Active filters amplify desired signals while rejecting unwanted frequencies, and can be tailored to meet application-specific requirements in electronics.
Amplifiers boost signal strength, match impedance levels, and are essential in many circuit systems, including audio, broadcasting, and telecommunications.
Batteries store and provide electrical energy, come in various types and sizes for multiple uses, rechargeable or single-use.
Capacitors store electrical charge with metallic plates and a dielectric; types vary and can be combined for specific circuit characteristics.
Chip carriers and sockets provide an interface between components and PCBs, enabling easy replacement or upgrading without soldering.
Circuit protection devices prevent damage from overcurrent flow, including fuses, breakers, surge protectors, and voltage regulators.
Connector accessories and support devices aid connector function and longevity, including backshells, grips, clamps, and ties; must be compatible with connector type.
Connectors join electronic circuits to transfer signals and power, come in various sizes and shapes, and include support accessories.
Converters transform DC input to another voltage level, essential in electronic systems, renewable energy, and automotive electronics.
Crystals and resonators generate and stabilize frequency signals via piezoelectricity. They are used in timing, frequency control, and filters. Crystals are quartz and resonators are ceramic with a built-in capacitor.
Semiconductor diodes control current flow in one direction (uni-directionality) via low resistance. Useful for rectification, voltage regulation, detection, and digital logic.
Discover essential electronic components for your devices, including CPU accelerators, system cache controllers, computer processors, motherboards, and graphics computing systems. Enhance device performance and connectivity with reliable components engineered for seamless integration and optimal functionality.
Fiber optics use light pulses to transmit data over long distances. They have superior bandwidth capacity, low signal attenuation, and secure physical properties. They are essential in telecommunications networks today.
Filters enhance signal processing by selectively passing desired frequencies while suppressing unwanted ones. Filters can be passive (using capacitors, resistors, and inductors) or active (using transistors or amplifiers).
Flash devices are non-volatile storage solutions that offer fast read and write speeds, making them ideal for applications requiring high-speed data transfer. These devices utilize flash memory technology, providing reliable storage for data-intensive tasks such as gaming, multimedia, and enterprise-level applications.
General purpose ICs consist of multiple individual circuits or components (e.g., logic gates, amplifiers, oscillators, etc.) that are combined onto a single integrated circuit chip for a smaller physical footprint.
I/O and storage controllers are crucial components in computer systems, managing input/output operations and storage devices. These controllers facilitate efficient data transfer between peripherals, storage drives, and the central processing unit (CPU), enhancing system performance and enabling seamless connectivity.
Inductors store energy in magnetic fields, oppose sudden changes in current flow and prevent electrical surges. Common inductor applications include power supplies, signal filters, and oscillators.
Interface ICs allow efficient device connectivity with high-speed data transfer and low power consumption.They can be ASIC or FPGA types, and may perform additional functions such as sensing, storage, and conversion.
Logic ICs can be used for storage, memory, amplification, and multiplexing. They perform fundamental logical operations on digital input signals (1, 0, H, L) to generate a corresponding digital output signal.
Memory modules are essential components in electronic devices, storing data temporarily or permanently for processing and retrieval. From volatile RAM (Random Access Memory) to non-volatile ROM (Read-Only Memory), memory technologies vary in speed, capacity, and functionality, catering to diverse application requirements.
Memory ICs store digital data and retain the information even when the power is turned off. They come in various types, like RAM (Random Access Memory) for fast data access, and ROM (Read-Only Memory) for permanent data storage.
Miscellaneous semiconductor components are a diverse category of electronic components that combines elements from a mix of component devices.
Optoelectronic devices interact with light. This family of devices can emit light, detect light, generate current, and transmit light signals for long-distance communication.
Oscillators generate repetitive waveforms, such as sine, square, or triangle waves. They are commonly used to produce stable and precise frequencies for applications like clocks, signal generation, and communication systems.
Other Function Semiconductor components are a diverse category of semiconductor components that perform a range of specialized functions.
Passive component networks operate without a power source and support data transmission within system by performing filtering, energy storage, and/or signal coupling functions.
Peripheral ICs (Integrated Circuits) are designed to control and manage the peripheral devices connected to a computer or other electronic device.
Programmable Logic ICs are user-programmable devices that allow designers to create custom logic circuits. These cost saving ICs offer real-time data processing and maximum design flexibilty.
RF (Radio Frequency) and microwave devices are used in telecommunications, wireless communications, and electronic systems. These devices include amplifiers, attenuators, filters, mixers, oscillators, and antennas, and a host of other components.
Voltage regulators are used to ensure a constant output voltage despite power fluctuations and load changes. Linear and switching regulators are common types used to maintain voltage stability.
Relays are electromagnetic switches that are used to control the flow of electrical current in an electrical circuit. Relays are a safe means of providing isolation between a controlling circuit and a controlled circuit.
Resistors control the flow of electrical current in a circuit by introducing a set resistance. These passive components reduce current flow, adjust signal levels, and bias active elements in circuits.
Transducers convert energy from one form to another and are crucial in sensing, audio and control systems. They transform physical measures like temperature, pressure, or sound into electrical signals for circuits.
Storage drives are hardware devices used to store and retrieve digital data in computers and electronic devices. These drives come in various forms, including hard disk drives (HDDs), solid-state drives (SSDs), and hybrid drives, offering different levels of capacity, speed, and durability to suit specific storage needs.
Storage media encompass physical or digital mediums used for storing and preserving digital data. From optical discs and magnetic tapes to USB flash drives and memory cards, storage media come in diverse formats and capacities, offering flexibility and reliability for data storage and archival purposes.
Storage systems comprise hardware and software components designed to manage and store digital data efficiently. These systems range from simple standalone devices to complex network-attached storage (NAS) and storage area network (SAN) solutions, providing scalable storage capacity and data protection features for businesses and enterprises.
Switches control electrical current flow by making or breaking connections. These devices vary in design and application, from basic on/off switches to complex industrial automation systems.
Telecom integrated circuits (ICs) are specialized electronics for telecommunications, tailored to high data rates, low power use, and reliable long-distance transmission. These devices include amplifiers, filters, ADCs, DACs, and more-- and they are often integrated on one chip for specific telecom tasks.
Terminal blocks, or connection terminals, are modular blocks that bring together multiple electrical wires at one connection point. They offer a reliable, organized way to terminate cables.
Thermal management devices control heat in electronic systems, preventing overheating and ensuring optimal performance and reliability. Examples include heat sinks, fans, and thermal interface materials that dissipate or transfer heat away from components.
Transformers are devices that alter electrical voltage levels between circuits through electromagnetic induction. They are vital in power distribution, converting high-voltage electricity for transmission and lower voltage for safe usage.
Transistors are 3-layer semiconductor devices that regulate the flow of electrical current. They function as amplifiers, boosting weak signals, and as switches, controlling the flow of current between terminals.
Triggering devices initiate electronic processes or events in response to specific conditions. These devices support many automated tasks such as activating switches and signals, or turning on lights when motion is detected.
Video cards, also known as graphics cards or GPU (Graphics Processing Unit), are essential components in computers, responsible for rendering graphics and images on display devices. These cards feature dedicated processors and memory, delivering smooth and immersive visual experiences for gaming, multimedia, and professional applications.
Choose from over than a million of proven quality materials. Over 300 manufacturers are presented. From renowned major international players to small independent companies with a proven track record in local markets.
Featured manufacturers
LD6805K/18P,115 by NXP Semiconductors is a CMOS regulator with 1.8V output voltage and 0.15A max current. It has a small outline package, operates b/w -40°C to 125°C, and offers 3% voltage tolerance. Ideal for applications requiring precise power regulation in compact designs.
Median Price
$0.223
Lifecycle Status
Suppliers In-Stock
5
In-Stock Inventory
1k+
Rochester
1+ parts
-
100+ parts
$0.232
1k+ parts
$0.192
10k+ parts
$0.172
Verical
$0.214
Digiode
$0.093
Vyrian
Anansix
Corphita
$0.088
Microchip USA
$14.280
AZTECH Wire
$20.590
Continental Prestige Electronics
$0.117
QUARKTWIN TECHNOLOGY LTD
UNI Independent Distributors
The use of plastic/epoxy material provides durability and protection for the regulator, making it suitable for a variety of applications.
The surface mount feature allows for easy and convenient installation on circuit boards, saving space and reducing assembly time.
With a high maximum operating temperature, this regulator can withstand harsh environments and extended usage without compromising performance.
The CMOS technology ensures efficient power consumption and low noise operation, making it an energy-efficient choice for regulating voltage.
The no lead terminal form simplifies the connection process and eliminates the risk of lead contamination, ensuring a safer and cleaner installation.
The low minimum operating temperature enables reliable performance even in extreme cold conditions, enhancing the regulator's versatility.
The tight voltage tolerance ensures precise and stable output voltage regulation, making it ideal for sensitive electronic devices.
The specific output voltage of 1.8V is suitable for various applications that require a consistent and reliable voltage supply.
Having 4 terminals provides flexibility in connecting external components and allows for customization of the regulator circuit as needed.
The small outline package style saves space and allows for efficient use of circuit board real estate, making it a compact and practical choice.
The fixed adjustability simplifies the design and operation of the regulator, ensuring consistent performance and reducing the risk of user error.
The fine terminal pitch of 0.635 mm enables precise connections and allows for a compact design, especially useful in miniaturized electronic devices.
The minimal line regulation ensures stable output voltage even with fluctuations in input voltage, maintaining the reliability of connected devices.
The dual terminal position provides redundancy and flexibility in the connection layout, accommodating different circuit configurations and ensuring robust performance.
The low load regulation ensures the voltage output remains constant even with varying load conditions, making it suitable for dynamic power requirements.
With a maximum output current of 0.15A, this regulator can efficiently power a range of electronic components and devices within its capacity.
The low dropout voltage of 0.25V allows for efficient energy conversion and minimal power loss, enhancing the overall efficiency of the regulator.
The maximum input voltage of 6V provides compatibility with a wide range of power sources, making this regulator versatile and adaptable to different setups.
Other Function Regulators LD6805K/18P,115 attributes and parameters. Explore more Other Function Regulators devices from NXP Semiconductors
Adjustability:
Nominal Dropout Voltage-1:
Maximum Input Voltage Absolute:
JESD-30 Code:
Maximum Line Regulation:
Maximum Load Regulation:
No. of Outputs:
No. of Terminals:
Operating Temperature (TJ-Max):
Operating Temperature (TJ-Min):
Maximum Output Current-1:
Nominal Output Voltage-1:
Package Body Material:
Package Code:
Package Equivalence Code:
Package Shape:
Package Style (Meter):
Packing Method:
Qualification Status:
Sub-Category:
Surface Mount:
Technology:
Terminal Form:
Terminal Pitch:
Terminal Position:
Maximum Voltage Tolerance:
LD6805K/18P,115 Regulators trade compliance attributes, and parameters.
ECCN
EAR99
ECCN Governance
EAR
HTS
8542.39.00.01
SB
8542.39.00.00
PCN Obsolescence/ EOL - Multiple Devices 06/Dec/2013 Multiple Devices 25/Dec/2013
PCN Design/Specification - LD6805 Series Datasheet Update 13/Jun/2013
PCN Packaging - All Dev Label Update 15/Dec/2020 Leadframe Material Update 20/Mar/2014
NXP is a leading semiconductor company that creates cutting-edge technology to power secure connections in a smarter world. Founded in 2006, they have grown to become one of the top five global semiconductor companies and serve their customers in over 70 countries around the world.
Executive Director, President, CEO
Kurt Sievers
Executive VP, CFO
Bill Betz
Executive VP, Chief Sales Officer
Ron Martino
ICN8
Fabrication
Fab Initiation
1996
Netherlands
Nijmegen
Wafer Capacity
55,000
ATMC (Austin Tech & Mfg Center)
1995
USA
Austin
30,000
N/A
1989
Germany
Boeblingen
CHD
1993
Chandler
OHTC
1991
24,000
New Expansion Fab
2026
ECHO
2020
10,000
DS18B20Z+
Maxim Integrated
TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL; Mounting Feature: SURFACE MOUNT; No. of Terminals: 8; Package Shape or Style: RECTANGULAR; Body Width: 3.9 inch; Maximum Supply Voltage: 5.5 V;
SMBJ18CA
Yageo
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
2N7002
STMicroelectronics
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .35 W; Maximum Drain Current (ID): .2 A; Transistor Application: SWITCHING;
LL4148
Diotec Semiconductor Ag
RECTIFIER DIODE; Terminal Position: END; Terminal Form: WRAP AROUND; No. of Terminals: 2; Surface Mount: YES; Package Shape: ROUND;
USB2514BI-AEZG
Standard Microsystems
BUS CONTROLLER, UNIVERSAL SERIAL BUS; Temperature Grade: INDUSTRIAL; Terminal Form: NO LEAD; No. of Terminals: 36; Package Code: HVQCCN; Package Shape: SQUARE;
C0603C104K5RACTU
KEMET Corporation
KEMET C0603C104K5RACTU is a ceramic capacitor with 0.1uF capacitance and 50V URdc. It has X7R temperature characteristics, -55 to 125 °C operating range, and ±10% tolerance. Ideal for SMT applications requiring compact size and reliable performance in various electronic circuits.
LM317AEMP/NOPB
National Semiconductor
ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR; No. of Terminals: 3; Package Code: SOP; Terminal Form: GULL WING; Qualification Status: Not Qualified; Width: 3.56 mm;
LM317T
Motorola
ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR; No. of Terminals: 3; Package Code: TO-220; Terminal Form: THROUGH-HOLE; No. of Outputs: 1; Package Equivalence Code: SIP3,.1TB;
Pro-an Electronic
TRANS VOLTAGE SUPPRESSOR DIODE; Surface Mount: YES; Maximum Clamping Voltage: 29.2 V; Polarity: BIDIRECTIONAL; Nominal Breakdown Voltage: 21.05 V; Maximum Repetitive Peak Reverse Voltage: 18 V;
LM7805CT
Fairchild Semiconductor
FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR; No. of Terminals: 3; Package Code: TO-220; Terminal Form: THROUGH-HOLE; Maximum Input Voltage Absolute: 35 V; Maximum Voltage Tolerance: 5 %;
1N4148
Sensitron Semiconductor
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
BAV99
Sprague Electric
RECTIFIER DIODE; Surface Mount: YES; Maximum Forward Voltage (VF): 1.3 V; Maximum Output Current: .1 A; Terminal Finish: Tin/Lead (Sn/Pb); Maximum Operating Temperature: 175 Cel;
BSS138BKW,115
NXP Semiconductors
NXP Semiconductors' BSS138BKW,115 is a N-CHANNEL FET with 60V DS breakdown voltage and 0.32A ID. Ideal for SWITCHING applications, it features a built-in diode, 1.6 ohm RDS(on), and operates in ENHANCEMENT MODE. Suitable for surface mount with GULL WING terminals, it meets AEC-Q101 standards.
NC7WZ17P6X
BUFFER; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 6; Package Code: TSSOP; Package Shape: RECTANGULAR;
1554216002
Molex
WIRE AND CABLE;
LM358MX
ROHM
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: GULL WING; No. of Terminals: 8; Package Code: LSOP; Package Shape: RECTANGULAR;
Bytesonic Electronics
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 3; Surface Mount: YES; Package Shape: RECTANGULAR;
International Components
RECTIFIER DIODE; Surface Mount: NO; No. of Elements: 1; Terminal Finish: Tin/Lead (Sn/Pb); JESD-609 Code: e0; Maximum Reverse Recovery Time: .004 us;
LM358N
Onsemi
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: THROUGH-HOLE; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR;
Weitron Technology
RECTIFIER DIODE; Surface Mount: NO; Maximum Reverse Recovery Time: .004 us; Config: SINGLE; Maximum Output Current: .15 A; Terminal Finish: Tin/Lead (Sn/Pb);
UA723CN3
Texas Instruments
UA723CN3 by Texas Instruments is a bipolar technology regulator with 14 terminals and adjustable output voltage from 2V to 37V. It offers excellent load regulation of 0.6% and line regulation of 0.02%/V, making it ideal for precision applications in various industries such as automotive, industrial, and telecommunications.
UA78L15ACLP1
UA78L15ACLP1 by Texas Instruments is a 3-terminal fixed voltage regulator with an output of 15V and max load regulation of 0.15%. Operating temperature ranges from 0 to 125°C, making it suitable for various applications requiring stable power supply within a voltage tolerance of 5%.
UA78M20MJG/883B
UA78M20MJG/883B by Texas Instruments is a ceramic packaged regulator with 20V output voltage, -55 to 125°C operating temperature range, and 5% voltage tolerance. Ideal for military applications due to MIL-STD-883 Class B screening level.
MC7805ACT
Samsung
Other Regulators; No. of Terminals: 3; Maximum Input Voltage Absolute: 35 V; Maximum Voltage Tolerance: 4 %; Terminal Finish: Tin/Lead (Sn/Pb); Qualification Status: Not Qualified;
LM323K
Other Regulators; No. of Terminals: 3; Maximum Input Voltage Absolute: 20 V; Maximum Voltage Tolerance: 5 %; Maximum Output Current-1: 3 A; Package Body Material: METAL;
LP2997M/NOPB
DDR TERMINATION REGULATOR; No. of Terminals: 8; Package Code: SOP; Terminal Form: GULL WING; Package Shape: RECTANGULAR; Maximum Seated Height: 1.75 mm;
LM305JGP4
LM305JGP4 by Texas Instruments is a ceramic packaged bipolar regulator with adjustable output voltage ranging from 4.5V to 40V. Featuring through-hole terminals and dual position, it operates b/w 0°C to 70°C making it suitable for various applications requiring precise voltage regulation in electronic circuits.
TL317MJG
TL317MJG by Texas Instruments is an adjustable bipolar regulator with a min output voltage of 1.2V and max output voltage of 32V. It operates in temperatures ranging from -55°C to 125°C, making it suitable for various applications requiring precise voltage regulation in harsh environments. With a ceramic package body material and through-hole terminal form, this device offers reliability and stability in diverse electronic systems.
UA78M15CKD
UA78M15CKD by Texas Instruments is a fixed 15V bipolar regulator with a max output current of 0.5A and operating temperature range from 0 to 125°C. It has a plastic/epoxy package body material, 3 terminals, and offers excellent line/load regulation for various applications in electronics circuits.
LM105H/883C
General Electric Solid State
Other Regulators; No. of Terminals: 8; Terminal Form: WIRE; Package Equivalence Code: CAN8,.2; Technology: BIPOLAR; Screening Level: MIL-STD-883 Class C;
SN0211033DBVR
SN0211033DBVR by Texas Instruments is a CMOS regulator with 1.8V output voltage, 0.15A output current, and 1V dropout voltage. It operates in temperatures ranging from -40 to 125°C and has a max input voltage of 10V. This small outline, thin profile package is ideal for applications requiring precise voltage regulation in compact electronic devices.
LM205L
LM205L by Texas Instruments is a BIPOLAR regulator with 8 terminals and adjustable output voltage from 4.5V to 40V. Its METAL package body makes it suitable for various applications, offering a wide operating temperature range of -25°C to 85°C in a CYLINDRICAL package style.
UA723CNP1
UA723CNP1 by Texas Instruments is an adjustable bipolar regulator with a min output voltage of 2V and max output voltage of 37V. It has 14 terminals in a rectangular package style, suitable for various applications requiring precise voltage regulation. With operating temperatures ranging from 0°C to 70°C, it is ideal for electronic devices needing stable power supply.
LP38691QSD-ADJ/NOPB
Other Regulators; No. of Terminals: 6; Package Code: SON; Terminal Form: NO LEAD; Maximum Load Regulation (%): 2.5 %; Qualification Status: Not Qualified;
TL580CJG4
TL580CJG4 by Texas Instruments is an adjustable bipolar regulator with a min output voltage of 2.5V and max output voltage of 24V. It has 8 terminals, ceramic package body material, and operates b/w 0°C to 70°C. Ideal for applications requiring precise voltage regulation in various electronic devices.
LM723H
Harris Semiconductor
Other Regulators; No. of Terminals: 10; Terminal Form: WIRE; Package Shape: ROUND; Maximum Output Voltage-1: 37 V; Adjustability: ADJUSTABLE;
UA7810CKC3
UA7810CKC3 by Texas Instruments is a fixed voltage regulator with an output of 10V and max load regulation of 0.2%. Operating temperature ranges from 0 to 125°C, making it suitable for various applications in electronics requiring stable power supply. With a package body material of PLASTIC/EPOXY, this bipolar technology regulator has 3 terminals and a terminal pitch of 2.54mm.
5962-1222402QHA
Other Regulators; Qualification Status: Not Qualified;
MC33269DT3.3
MC33269DT3.3 by Motorola is a 3-terminal fixed voltage regulator with an output of 3.3V and max current of 0.8A. It operates in temperatures ranging from -40 to 125°C, making it suitable for various applications requiring stable voltage regulation in a compact surface-mount package.
TL431CDBV6-J
Other Regulators;
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
LD6806TD/30H,125
Other Regulators; No. of Terminals: 5; Package Code: TSOP; Terminal Form: GULL WING; Maximum Input Voltage Absolute: 6 V; Maximum Voltage Tolerance: 3 %;
LD6806CX4/30P,315
NXP Semiconductors' LD6806CX4/30P,315 is a CMOS regulator with 3% voltage tolerance and 3V output. It has a max load regulation of 0.0597%, operating temperature range from -40 to 85°C, and can handle up to 0.2A output current. Ideal for applications requiring precise voltage regulation in compact electronic devices.
LD6805K/22P,115
Other Regulators; No. of Terminals: 4; Package Code: SON; Terminal Form: NO LEAD; Maximum Input Voltage Absolute: 6 V; Nominal Output Voltage-1: 2.2 V;
LD6805K/14H,115
Other Regulators; No. of Terminals: 4; Package Code: SON; Terminal Form: NO LEAD; Maximum Input Voltage Absolute: 6 V; Maximum Voltage Tolerance: 4 %;
LD6805K/185H,115
Other Regulators; No. of Terminals: 4; Package Code: SON; Terminal Form: NO LEAD; Maximum Input Voltage Absolute: 6 V; Maximum Voltage Tolerance: 3 %;
LD6805K/21P,115
LD6805K/16H,115
LD6805K/23H,115
Other Regulators; No. of Terminals: 4; Package Code: SON; Terminal Form: NO LEAD; Maximum Input Voltage Absolute: 6 V; Terminal Pitch: .635 mm;
LD6805K/12P,115
NXP Semiconductors' LD6805K/12P,115 is a CMOS regulator with 1.2V output voltage and 0.15A current capacity. Operating temperature ranges from -40 to 125°C, making it suitable for various applications in electronics requiring stable power supply. The package style is small outline with surface mount capability, ideal for compact designs.
LD6805K/18H,115
LD6805K/14P,115
LD6805K/21HX
LD6805K/15P,115
LD6805K/22H,115
Other Regulators; No. of Terminals: 4; Package Code: SON; Terminal Form: NO LEAD; Maximum Input Voltage Absolute: 6 V; Maximum Output Current-1: .15 A;
LD6805K/13P,115
LD6805K/20H,115
LD6805K/16P,115
LD6805K/12H,115
Other Regulators; No. of Terminals: 4; Package Code: SON; Terminal Form: NO LEAD; Maximum Input Voltage Absolute: 6 V; No. of Outputs: 1;
LD6805K/13H,115
Supply Digital Components
$106.00
$54.25
$11.90
$7.29
Quantity
12,000 In-Stock
Total price ≈ $80,197.29
© 2023 All rights reserved