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
PA2748NLT by Pulse Electronics is a Data Line Filter with 2 functions and 4 terminals. It offers inductance of 1125 uH, rated current of 1.8 A, and max operating temperature of 130°C. Ideal for applications requiring surface mount filters for data lines.
Median Price
$0.904
Lifecycle Status
Suppliers In-Stock
8
In-Stock Inventory
1k+
Master Electronics
1+ parts
$1.888
100+ parts
-
1k+ parts
$1.056
10k+ parts
$0.819
Arrow
$0.877
Verical
Chip Stock
Vyrian
Sensible Micro Corp
Nova Conductors
TME
$1.400
$1.260
Corohmni
$0.522
Aztec Data Supply Inc.
$2.756
AZTECH Wire
$9.184
Continental Prestige Electronics
Argo Parts USA
Kepictronics
iodParts Technologies Inc.
Bastille Electronics
Having 2 functions allows for better filtering capabilities, ensuring a cleaner data signal.
With 4 terminals, this data line filter offers a secure and stable connection for enhanced performance.
Being a data line filter, this product is specifically designed to reduce electromagnetic interference on data lines, resulting in improved data transmission quality.
The high maximum operating temperature of 130°C ensures stable performance even in demanding environmental conditions.
The low minimum operating temperature of -40°C makes this data line filter suitable for use in a wide range of temperature settings.
With a high inductance of 1125 microhenries, this data line filter effectively suppresses noise and interference on data lines.
The compact width of 12.7mm allows for easy integration and installation, making it suitable for space-constrained applications.
With a low maximum DC resistance of 0.0495 ohms, this data line filter minimizes power loss and ensures efficient data transmission.
The length of 13.2mm provides a good balance between performance and compactness, making it versatile for various applications.
The TR packing method ensures easy handling and storage of the data line filters, simplifying the manufacturing process.
The surface mounting type offers secure attachment to circuit boards, enhancing reliability and ease of assembly.
The compact dimensions of this data line filter make it versatile for a range of applications, while also offering flexibility in installation.
With a rated current of 1.8 amps, this data line filter can handle high current loads, ensuring stable operation in demanding scenarios.
The height of 5.6mm provides a good balance between compactness and thermal dissipation, making it suitable for various space-constrained environments.
Data Line Filters PA2748NLT attributes and parameters. Explore more Data Line Filters devices from Pulse Electronics
Additional Features:
Maximum DC Resistance:
Filter Type:
Height:
Inductance:
Length:
Mounting Type:
No. of Functions:
No. of Terminals:
Maximum Operating Temperature:
Minimum Operating Temperature:
Packing Method:
Dimensions:
Rated Current:
Width (mm):
PA2748NLT Filters trade compliance attributes, and parameters.
ECCN
EAR99
ECCN Governance
EAR
HTS
8504.50.80.00
SB
8504.50.00.00
Pulse, a member of the YAGEO Group (2327, TAI), was founded in 1956 and is a leader in technology, design and manufacturing of power and signal magnetics, current sensing, antennas, and connectors. Pulse products can be found in a wide range of applications including electric vehicles, 5G mobile network systems, smart grids, wearables. Lighting, cell phones, datacenters, wireless charging, industrial automation equipment and security.
1N4148
Bkc Semiconductors
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
BSS138
Changzhou Galaxy Century Microelectronics
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Time At Peak Reflow Temperature (s): NOT SPECIFIED; Minimum DS Breakdown Voltage: 50 V; Maximum Operating Temperature: 150 Cel;
2N2222A
Aeroflex/metelics
NPN; Configuration: SINGLE; Surface Mount: NO; Maximum Collector Current (IC): .8 A; Package Shape: ROUND; Transistor Application: SWITCHING;
LM107H
General Electric Solid State
OPERATIONAL AMPLIFIER; Temperature Grade: MILITARY; Terminal Form: WIRE; No. of Terminals: 8; Package Shape: ROUND; Minimum Voltage Gain: 25000;
IRLML6401TRPBF
Infineon Technologies
IRLML6401TRPBF by Infineon is a P-CHANNEL FET for SWITCHING applications. It features a 12V DS Breakdown Voltage, 34A IDM, and 0.05ohm RDS(on). With a small outline package style, it operates in an ambient temperature range of -55 to 150 °C.
STM32F103C8T6
STMicroelectronics
STM32F103C8T6 by STMicroelectronics is a 32-bit microcontroller with 48 terminals, operating at up to 16 MHz. It features 10-Ch 12-Bit ADC channels and 7 DMA channels, suitable for industrial applications requiring low power consumption and high-speed connectivity via CAN, I2C(2), SPI(2), USART(3), USB.
STM32H753BIT6
STM32H753BIT6 by STMicroelectronics is a 32-bit microcontroller with 208 terminals, operating at up to 48 MHz. It features 20-Ch 16-Bit ADCs, 2-Ch 12-Bit DACs, and extensive peripherals for industrial applications like CAN, Ethernet, and USB connectivity. With a wide temperature range of -40 to +85 °C, it's ideal for demanding environments requiring high-speed processing capabilities.
BAV99
Jgd Semiconductors
RECTIFIER DIODE; Surface Mount: YES; Maximum Reverse Recovery Time: .006 us; Maximum Repetitive Peak Reverse Voltage: 70 V; Maximum Forward Voltage (VF): 1 V; Maximum Operating Temperature: 150 Cel;
Itt Semiconductor
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 250 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
NE555DR
Texas Instruments
NE555DR by Texas Instruments is an Analog Waveform Generation IC with 8 terminals, operating voltage of 5V, and power supplies ranging from 5-15V. It is a versatile component for pulse generation applications due to its small outline package and commercial temperature grade suitability.
C0603C104K5RACAUTO
KEMET Corporation
KEMET C0603C104K5RACAUTO is a ceramic capacitor with 0.1uF capacitance, rated for 50V. It has X7R temperature characteristics, -55 to 125°C operating range, and ±10% tolerance. Ideal for automotive applications meeting AEC-Q200 standard, it comes in SMT package with matte tin finish and wraparound terminals.
LL4148
RECTIFIER DIODE; Terminal Position: END; Terminal Form: WRAP AROUND; No. of Terminals: 2; Surface Mount: YES; Package Shape: ROUND;
1N4148WS
Jiangsu Changjiang Electronics Technology
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
LM107H/883
Advanced Micro Devices
OPERATIONAL AMPLIFIER; Temperature Grade: MILITARY; Terminal Form: WIRE; No. of Terminals: 8; Package Shape: ROUND; Low-Offset: NO;
SS14
Sensitron Semiconductor
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
SPC TECHNOLOGY/ MULTICOMP
First Components International
Semiconductor Technology
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
BSS84PH6327XTSA2
BSS84PH6327XTSA2 by Infineon is a P-CHANNEL FET with 60V DS breakdown voltage, ideal for switching applications. It features a single configuration with built-in diode and operates in enhancement mode. With a max drain current of 0.17A and on-resistance of 8 ohm, it offers reliable performance in small outline packages.
Eic Semiconductor
742792651
Wuerth Elektronik & Kg
Wurth Elektronik 742792651 is a surface mount data line filter with AEC-Q200 screening. Featuring multi-layer construction, it has 2 terminals and FERRITE BEAD filter type. With dimensions of L1.6xB0.8xH0.8 mm, it operates b/w -55 to 125°C and offers an output impedance of 600 ohm for applications requiring noise suppression in automotive electronics.
BLM41PG750SN1
Murata Manufacturing
Murata Manufacturing's BLM41PG750SN1 is a FERRITE CHIP filter with 2 terminals, rated for 3A current. With dimensions of L4.5XB1.6XH1.6 (mm), it operates b/w -55 to 125 °C, offering an output impedance of 75 OHM. Ideal for data line filtering in surface mount applications due to its low DC resistance of 0.025 ohm and compact size.
74279228260
Wurth Elektronik's 74279228260 is a FERRITE CHIP data line filter with 2 terminals. It has a max operating temp of 125°C and min of -55°C, DC resistance of 0.008 ohm, and output impedance of 26Ω. Ideal for applications requiring surface mount filters with a rated current of 6.5A.
CM5441Z161B-10
Laird Technologies
The Laird Technologies CM5441Z161B-10 is a data line filter with 2 functions and 4 terminals. It has a max DC resistance of 0.0003 ohm and an output impedance of 160 OHM, suitable for applications requiring a rated current of 75 A. This through-hole mount filter measures L13.72XB10.41XH15.24 mm and is ideal for use in electronic devices to reduce electromagnetic interference.
BLM15EG121SN1D
Murata Manufacturing's BLM15EG121SN1D is a chip bead data line filter with 2 terminals, operating b/w -55 to 125°C. With dimensions of 1x0.5x0.5mm, it offers a DC resistance of 0.095 ohm and output impedance of 120 ohm. Ideal for applications requiring filtering in the frequency range of 100-1000 MHz.
742792043
Wurth Elektronik 742792043 is an AEC-Q200 rated FERRITE CHIP filter with 2 terminals, suitable for data line applications. Featuring multi-layer construction, it operates b/w -55 to 125 °C with a DC resistance of 0.65 ohm. With dimensions of L2.0XB1.2XH0.9 (mm), it has a max frequency of 190 MHz and output impedance of 600 OHM.
BLM21BB750SN1D
Murata Manufacturing's BLM21BB750SN1D is an 0805 chip bead filter with 2 terminals, operating b/w -55°C to 125°C. With a DC resistance of 0.16 ohm and output impedance of 75 ohm, it's ideal for data line filtering applications at frequencies ranging from 100 MHz.
BLM31PG601SN1L
BLM31PG601SN1L by Murata is a chip bead data line filter with 2 terminals, rated for 1.5A current and 600 ohm output impedance. It operates b/w -55 to 125 °C, with dimensions of L3.2xB1.6xH1.1 mm and is used in surface mount applications for filtering frequencies up to 100 MHz.
HH-1M1608-121JT
Ceratech
FERRITE CHIP; Maximum DC Resistance: .14 ohm; Material: Ferrite; Rated Current: 1.1 A; No. of Functions: 1; Length: 1.6 mm;
DLP11TB800UL2L
Murata Manufacturing's DLP11TB800UL2L is a Data Line Filter with 2 functions, rated at 5V. It offers a max operating temperature of 85°C and min insulation resistance of 100 Mohm. Ideal for applications requiring filtering in data lines with dimensions of L1.25xB1.0xH0.3mm.
HZ0805E601R-10
Steward
FERRITE CHIP; Construction: Chip Bead; Maximum DC Resistance: .3 ohm; Maximum Frequency: 1000 MHz; Material: Ferrite; Rated Current: .5 A;
BK1005HS102-T8
Taiyo Yuden
BK1005HS102-T8 by Taiyo Yuden is a FERRITE CHIP filter with 2 terminals, rated at 0.3A current. With dimensions of 1mm length, 0.5mm width, and 0.5mm height, it has a max DC resistance of 0.58 ohm and output impedance of 1000 ohm. Ideal for data line filtering applications with operating temperatures ranging from -55°C to 125°C.
ACM2012-121-2P-T002
TDK
TDK's ACM2012-121-2P-T002 is a FERRITE CHIP filter with 2 functions, rated at 50V and 0.37A. With dimensions of L2.0xB1.2xH1.3 (mm), it offers high insulation resistance for data line filtering applications in electronics, ensuring reliable performance from -40 to 85 °C temperatures.
742792655
The Wurth Elektronik 742792655 is a data line filter with a multi-layer construction. It has a max operating temperature of 125°C and a min operating temperature of -55°C. This surface mount filter is suitable for applications requiring a frequency range of 100 MHz to 600 MHz.
EXC3BB221H
Panasonic
The Panasonic EXC3BB221H is a 0603 multilayer chip data line filter with FERRITE CHIP construction. It has 2 terminals, operates b/w -25 to 85 °C, and offers an output impedance of 220 OHM. Ideal for surface mount applications, it measures L1.6XB0.8XH0.8 (mm) and is suitable for filtering signals up to 100 MHz frequency range.
D-08C2A
Tokin
DATA LINE FILTER; Maximum DC Resistance: .07 ohm; Rated Current: .5 A; Width (mm): 16.0; Rated Voltage: 50 V; Dimensions: L21.0XB16.0XH14.0 (mm)/L0.827XB0.63XH0.551 (inch);
DLW21HN181SQ2L
Murata Manufacturing's DLW21HN181SQ2L is a data line filter with 2 functions, rated at 50V and 0.25A. It offers a max DC resistance of 0.5 ohm and an output impedance of 180 ohm, suitable for applications requiring noise suppression in data lines. With dimensions of L2.0xB1.2xH0.9 (mm), it is designed for surface mount installation in electronic devices operating b/w -40°C to 85°C.
NFE31PT471F1E9L
Murata Manufacturing's NFE31PT471F1E9L is a 3-terminal data line filter with 1000 Mohm insulation resistance, 25V rated voltage, and 470uF capacitance. It operates b/w -40 to 85 °C and has matte tin over nickel terminal finish. Ideal for surface mount applications requiring up to 6A current filtering.
BLM21PG221SN1D
Murata Manufacturing's BLM21PG221SN1D is an 0805 chip bead filter with 2 terminals, operating from -55 to 125°C. With a width of 1.25mm and length of 2mm, it offers a max frequency of 100MHz and DC resistance of 0.05 ohm. Ideal for data line filtering applications due to its ferrite material and output impedance of 220 ohm.
DLW43SH101XK2K
DLW43SH101XK2K by Murata Manufacturing is a FERRITE CHIP filter with 100uH inductance and 10 Mohm min insulation resistance. It has 2 functions, rated at 50V and 0.2A, suitable for AEC-Q200 applications in automotive electronics due to its compact size of L4.5xB3.2xH2.6mm for surface mounting.
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
PA2745NLT
Pulse Electronics
DATA LINE FILTER; Maximum DC Resistance: .0067 ohm; Rated Current: 5 A; Length: 13.2 mm; Height: 5.6 mm; Packing Method: TR;
PA2756NLT
DATA LINE FILTER; Maximum DC Resistance: .0077 ohm; Rated Current: 8 A; Width (mm): 17.02; Dimensions: L19.56XB17.02XH9.91 (mm)/L0.77XB0.67XH0.39 (inch); No. of Functions: 2;
PA2745NL
DATA LINE FILTER; Maximum DC Resistance: .0067 ohm; Rated Current: 5 A; Mounting Type: SURFACE MOUNT; No. of Functions: 2; No. of Terminals: 4;
PA2743NL
DATA LINE FILTER; Maximum DC Resistance: .018 ohm; Rated Current: 3.3 A; Length: 13 mm; No. of Terminals: 4; Width (mm): 13.0;
PA2743NLT
DATA LINE FILTER; Maximum DC Resistance: .018 ohm; Rated Current: 3.3 A; Length: 13 mm; Mounting Type: SURFACE MOUNT; Packing Method: TR;
PA2749NL
DATA LINE FILTER; Maximum DC Resistance: .0171 ohm; Rated Current: 3.8 A; Width (mm): 14.22; No. of Functions: 2; Inductance: 536 uH;
PA2749NLT
DATA LINE FILTER; Maximum DC Resistance: .0171 ohm; Rated Current: 3.8 A; Mounting Type: SURFACE MOUNT; Height: 8.9 mm; Packing Method: TR;
PA2755NLT
DATA LINE FILTER; Maximum DC Resistance: .0024 ohm; Rated Current: 14 A; Packing Method: TR; No. of Functions: 2; Maximum Operating Temperature: 130 Cel;
PA2755NL
DATA LINE FILTER; Maximum DC Resistance: .0024 ohm; Rated Current: 14 A; No. of Functions: 2; Width (mm): 19.05; Length: 21.1 mm;
PA2756NL
DATA LINE FILTER; Maximum DC Resistance: .0077 ohm; Rated Current: 8 A; Width (mm): 17.02; Additional Features: 0.0077 DC RESISTANCE MAX AVAILABLE; Height: 9.91 mm;
PA2746NLT
DATA LINE FILTER; Maximum DC Resistance: .0043 ohm; Rated Current: 6 A; Additional Features: 0.0043 DC RESISTANCE MAX AVAILABLE; Dimensions: L13.2XB13.2XH5.6 (mm)/L0.52XB0.52XH0.22 (inch); Inductance: 96 uH;
PA2748NL
DATA LINE FILTER; Maximum DC Resistance: .055 ohm; Rated Current: 1.8 A; Width (mm): 12.7; Inductance: 1125 uH; Maximum Operating Temperature: 130 Cel;
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