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
7XZ-32.768K-BA-T by Txc is a ceramic XO Clock Oscillator with 25% frequency stability, suitable for applications requiring a 3.3V power supply and 15pF output load. It operates at 0.032768 MHz with a max rise time of 200ms, making it ideal for surface mount installations in temperature-sensitive environments.
Median Price
$1.306
Lifecycle Status
Suppliers In-Stock
12
In-Stock Inventory
1k+
Arrow
1+ parts
$0.428
100+ parts
$0.425
1k+ parts
-
10k+ parts
Mouser Electronics
$1.650
$1.280
$1.150
$0.964
Newark
$1.820
$1.410
$1.300
DigiKey
$2.000
$1.273
$0.934
$0.737
Farnell
$1.148
$1.020
$1.010
Element14
$1.149
$1.037
Verical
Nova Conductors
$1.036
VNN
Vyrian
Chip Stock
Prism Electronics
Corohmni
$0.698
Continental Prestige Electronics
$1.016
Argo Parts USA
Netroflash
Perfect Parts
Ceramic package provides excellent thermal stability and durability, making the oscillator reliable in various operating conditions.
Offers a stable frequency output with minimal drift over time, ensuring accurate timekeeping and synchronization in applications.
Can handle higher supply voltages, providing flexibility in power supply design without risk of damage.
Suitable for driving standard loads, ensuring compatibility with a wide range of circuit configurations.
Low power consumption helps in reducing overall energy usage and prolonging battery life in portable devices.
Operates at a commonly used supply voltage, making it easy to integrate into existing systems without additional voltage regulation.
CMOS technology offers low power consumption, fast switching speeds, and high noise immunity, making it suitable for digital applications.
Can withstand high temperatures, making it suitable for industrial and automotive applications where heat dissipation is a concern.
Capable of operating in cold environments without performance degradation, ensuring reliable operation in varying temperature conditions.
Provides a standard clock frequency commonly used in many digital systems, offering compatibility with existing designs.
Surface mount package allows for easy and efficient PCB assembly, saving space and reducing manufacturing costs.
XO Clock Oscillators 7XZ-32.768K-BA-T attributes and parameters. Explore more XO Clock Oscillators devices from Txc
Additional Features:
Maximum Fall Time:
Frequency Adjustment (Mechanical):
Frequency Stability:
Mounting Feature:
No. of Terminals:
Nominal Operating Frequency:
Maximum Operating Temperature:
Minimum Operating Temperature:
Oscillator Type:
Output Load:
Package Body Material:
Package Equivalence Code:
Physical Dimension:
Power Supplies (V):
Qualification:
Maximum Rise Time:
Sub-Category:
Maximum Supply Current:
Maximum Supply Voltage:
Minimum Supply Voltage:
Nominal Supply Voltage:
Maximum Symmetry (%):
TXC Corporation, founded in 1983, is a professional frequency control and sensor solutions provider. We are dedicated to the R&D, design, production and sales of crystal and oscillator products. Based upon our core and cutting-edge technologies, TXC successfully expanded into diversified markets with innovative product portfolio. Our advanced products can be used in a wide variety of applications including mobile communication, wearable devices, IoT, server, storage, automotive, telecommunication and medical devices. Our goal is to enhance the added value of our esteemed customers by providing cost effective, high quality, on-time delivery and professional products/services to exceed their expectations, thereby becoming one of their best strategic partners. With more than three decades of endeavor, TXC now has the following production locations and subsidiary apart from our headquarters in Taiwan.
SZNUP2105LT1G
Onsemi
SZNUP2105LT1G by Onsemi is a Transient Suppression Device with 2 elements in a common anode configuration. It has a max non-repetitive peak reverse power dissipation of 350W and breakdown voltage of 29.1V. Ideal for applications requiring bidirectional polarity protection, such as automotive electronics and industrial equipment due to its AEC-Q101 compliance and high clamping voltage of 44V.
LM317T/NOPB
Texas Instruments
LM317T/NOPB by Texas Instruments is an adjustable positive single output standard regulator with a max output voltage of 37V and max input-output voltage differential of 40V. It operates in temperatures ranging from 0 to 125°C, making it suitable for various applications requiring precise voltage regulation in electronic circuits. The package style is flange mount with three terminals for easy installation.
MBRS130LT3G
MBRS130LT3G by Onsemi is a Schottky rectifier diode with a max output current of 1A and forward voltage of 0.445V. It operates b/w -65 to 125°C, has a reverse test voltage of 30V, and is ideal for power applications due to its small outline package style.
1N4148
Fairchild Semiconductor
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
261
New England Microwave
Other Interface ICs; No. of Terminals: 14; Package Equivalence Code: FL14(UNSPEC); Power Supplies (V): +-5,-15; Package Body Material: PLASTIC/EPOXY; Surface Mount: YES;
SS14
Pro-an Electronic
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
2N2222A
Ksl Microdevices
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
SMBJ18CA
International Semiconductor
TRANS VOLTAGE SUPPRESSOR DIODE; Surface Mount: YES; Maximum Clamping Voltage: 29.2 V; Nominal Breakdown Voltage: 21.1 V; Maximum Repetitive Peak Reverse Voltage: 18 V; Polarity: BIDIRECTIONAL;
NUP2105LT1G
NUP2105LT1G by Onsemi is a Transient Suppression Device with 350W power dissipation, 29.1V breakdown voltage, and 44V clamping voltage. Commonly used in electronic circuits for surge protection due to its bidirectional polarity and silicon diode element material.
ECA2DHG4R7
Panasonic
ECA2DHG4R7 by Panasonic is a 4.7uF aluminum electrolytic capacitor with 200V rated DC voltage. It features tan delta of 0.15, leakage current of 0.0664mA, and ripple current of 50mA, making it ideal for applications requiring high capacitance stability and low leakage in through-hole mounting setups at temperatures ranging from -25 to 105°C.
SS495ASP
Micro Switch
The Micro Switch SS495ASP is an analog circuit IC with a supply voltage range of 4.5V to 10.5V, suitable for automotive applications. Its package body material is plastic/epoxy, and it has a rectangular shape with three terminals. Operating temperature ranges from -40°C to 125°C, making it ideal for various automotive sensor and control systems.
1N4148WT
1N4148WT by Onsemi is a single rectifier diode with a max output current of 0.3A and forward voltage of 0.72V. It has a small outline package style, matte tin terminal finish, and operates at temperatures up to 150°C. Ideal for applications requiring fast reverse recovery time such as power supplies and signal demodulation circuits.
STM32H743ZIT6
STMicroelectronics
STM32H743ZIT6 by STMicroelectronics is a 32-bit microcontroller with integrated cache and a max supply voltage of 3.6V. It is commonly used in industrial applications, offering features such as 21 timers, CAN and USB connectivity, and low power mode.
DS18B20U+
Maxim Integrated
TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL; Mounting Feature: SURFACE MOUNT; No. of Terminals: 8; Package Shape or Style: SQUARE; Housing: PLASTIC; Minimum Supply Voltage: 3 V;
M39029/58-360
Molex
CONNECTOR ACCESSORY; Alternate Contact Sources: MILITARY; Removal Tool Sources: MILITARY; Material: COPPER ALLOY; National Stock Number (NSN): 5999004733551; Mating Contacts: M39029/56-348, M39029/57-354;
2N7002DWH6327XTSA1
Infineon Technologies
2N7002DWH6327XTSA1 by Infineon: N-CHANNEL FET with 60V DS Breakdown Voltage, 0.3A ID, and 3ohm RDS. Ideal for SWITCHING applications in small outline packages with GULL WING terminals.
C0603X104K5RACAUTO
KEMET Corporation
C0603X104K5RACAUTO by KEMET Corp is a ceramic capacitor with capacitance of 0.1 uF and rated DC voltage of 50 V. It has a temperature coefficient of 15% and can operate b/w -55 to 125 °C. This SMT package is commonly used in automotive applications due to its AEC-Q200 reference standard.
Forward International Electronics
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .625 W; Maximum Collector Current (IC): .6 A;
Eic Semiconductor
LM555CN
LM555CN by Texas Instruments is an Analog Waveform Generation IC with a supply voltage range of 4.5V to 16V. It operates b/w 0°C to 70°C, making it suitable for commercial applications. This rectangular package IC has dual terminals and uses bipolar technology for pulse generation in various electronic circuits.
LTC6908IDCB-1#TRPBF
Linear Technology
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 6; Frequency Stability: 40 %; Frequency Adjustment (Mechanical): NO; Maximum Supply Voltage: 5.5 V;
SG5032CAN12.000000M-TJGA3
Seiko Epson
SG5032CAN12.000000M-TJGA3 by Seiko Epson is a CMOS XO Clock Oscillator with 12 MHz frequency, 50% stability, and 15 pF load. Ideal for applications requiring precise timing in temperature ranges from -40 to 85°C, it operates at voltages b/w 1.6V to 3.6V and features gold over nickel terminal finish.
530CB25M0000DGR
Skyworks Solutions
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 6; Frequency Stability: 20 %; Frequency Adjustment (Mechanical): NO; Nominal Supply Voltage: 3.3 V;
ASFLMB-100.000MHZ-XY-T
Abracon
Abracon's ASFLMB-100.000MHZ-XY-T is a 100MHz XO Clock Oscillator with 10% frequency stability, CMOS technology, and 15pF output load. Ideal for applications requiring precise timing in temperature range of -40 to 105°C.
FXO-HC735-20.48
Fox Electronics
HCMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 50 %; Frequency Adjustment (Mechanical): NO; Minimum Supply Voltage: 3.135 V;
ASE-12.000MHZ-L-C-T
Abracon's ASE-12.000MHZ-L-C-T is a 12MHz XO Clock Oscillator with 50% frequency stability, ideal for CMOS technology applications. It operates at a nominal voltage of 3.3V, drawing a max current of 7mA. With compact dimensions of 3.2mm x 2.5mm x 1.0mm and surface mounting feature, it suits various electronic devices requiring precise timing control in the temperature range of -40 to +85°C.
ISM92-3351AH-14.7456MHZ
Abracon's ISM92-3351AH-14.7456MHZ XO Clock Oscillator operates at 14.7456MHz with a frequency stability of 25%. It has a max supply voltage of 3.465V and is ideal for applications requiring precise timing in electronics, telecommunications, and industrial equipment.
LTC6991CS6#PBF
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 6; Frequency Adjustment (Mechanical): NO; Minimum Supply Voltage: 2.25 V; Maximum Rise Time: 2.7 ms;
DSC6001HE1B-011.0592T
Microchip Technology
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 50 %; Frequency Adjustment (Mechanical): NO; Maximum Symmetry (%): 55/45;
AP3S1-19.200MHZ-EJ-T
Abracon's AP3S1-19.200MHZ-EJ-T is a 19.2MHz XO Clock Oscillator with 20% frequency stability, CMOS type, and 15pF output load. Ideal for applications requiring precise timing in temperature range of -20°C to 70°C.
ASEMB-8.000MHZ-LY-T
Abracon's ASEMB-8.000MHZ-LY-T is a 4-terminal CMOS XO Clock Oscillator with 8MHz frequency, suitable for applications requiring a supply voltage of 1.8/3.3V. With a compact size of 3.2mm x 2.5mm x 0.85mm and operating temperature range from -40 to 85°C, it is ideal for surface mount technology in various electronic devices.
DSC1001DI1-024.0000
Microchip's DSC1001DI1-024.0000 XO Clock Oscillator operates at 24 MHz with 50% frequency stability, suitable for CMOS applications. It has a 3.3 V supply voltage, 10 KOHM output load, and compact dimensions of 2.5mm x 2.0mm x 0.85mm, making it ideal for surface mount installations in various electronic devices.
S1613B-24.5760
Diodes Incorporated
Diodes Inc.'s S1613B-24.5760 is a ceramic XO Clock Oscillator with 24.576 MHz frequency, 50% stability, and 15 pF output load. Ideal for applications requiring precise timing in temperature range of -10 to 70°C, it operates at supply voltage of 2.97-3.63V with CMOS oscillator type and surface mounting feature.
ASDMB-48.000MHZ-XY-T
Abracon's ASDMB-48.000MHZ-XY-T is a 48 MHz XO Clock Oscillator with 10% frequency stability, 15 pF output load, and CMOS oscillator type. Ideal for applications requiring precise timing in temperature range of -40 to 105°C. Suitable for surface mounting with compact dimensions of 2.5mm x 2.0mm x 0.85mm.
AX3DCF1-100.0000T3
Abracon's AX3DCF1-100.0000T3 is a 100MHz LVDS XO Clock Oscillator with 25% frequency stability, suitable for applications requiring precise timing. Operating at 1.8V, it offers fast rise time of 0.5ms and fall time of 0.5ns, making it ideal for high-speed digital circuits in temperature-sensitive environments.
LTC6991IDCB#PBF
Analog Devices
LTC6991IDCB#PBF by Analog Devices is a CMOS XO Clock Oscillator with 6 terminals. It operates b/w -40°C to 85°C, with supply voltage range of 2.25V to 5.5V. Featuring fast rise time of 2.7ms and fall time of 2.4ns, it's ideal for applications requiring precise timing in compact designs.
DSC1123BI2-148.5000T
Microchip Technology's DSC1123BI2-148.5000T XO Clock Oscillator operates at 148.5 MHz with LVDS type, 25% frequency stability, and 100 OHM output load. Ideal for applications requiring precise timing in a temperature range of -40 to 85 °C, it features compact dimensions of 5.0mm x 3.2mm x 0.85mm for surface mount installation.
LTC6991HS6#TRMPBF
LTC6991HS6#TRMPBF by Analog Devices is a CMOS XO Clock Oscillator with 5.5V max supply voltage, 5 KOHMS output load, and 2.7ms rise time. Ideal for applications requiring precise timing control in compact designs due to its small form factor of 2.9mm x 1.5mm x 1.0mm and surface mounting feature.
545ACA128M000ABG
Silicon Labs
Silicon Labs' 545ACA128M000ABG is a LVPECL XO Clock Oscillator with 7% frequency stability, 128 MHz nominal operating frequency, and 3.465 V max supply voltage. Ideal for applications requiring precise timing such as networking equipment, telecommunications devices, and industrial automation systems.
FXO-HC536R-12.288
Integrated Device Technology
HCMOS; Mounting Feature: SURFACE MOUNT; Frequency Stability: 25 %; Frequency Adjustment (Mechanical): NO; Maximum Operating Temperature: 85 Cel; Nominal Supply Voltage: 3.3 V;
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
7XZ-32.768K-CE-T
Txc
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 50 %; Frequency Adjustment (Mechanical): NO; Physical Dimension: 3.2mm x 2.5mm x 1.0mm;
7XZ-32.768K-DA-T
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 25 %; Frequency Adjustment (Mechanical): NO; Maximum Operating Temperature: 70 Cel;
7XZ-32.768K-BE-T
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 50 %; Frequency Adjustment (Mechanical): NO; Package Body Material: CERAMIC;
7XZ-32.768K-CA-T
7XZ-32.768K-DE-T
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 50 %; Frequency Adjustment (Mechanical): NO; Maximum Supply Current: 3 mA;
7XZ-32.768KBA-B
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 25 %; Frequency Adjustment (Mechanical): NO; Package Body Material: CERAMIC;
7XZ-32.768KBE-B
7XZ-32.768K-DD-T
7XZ-32.768K-CD-T
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 25 %; Frequency Adjustment (Mechanical): NO; Minimum Supply Voltage: 2.25 V;
7XZ-32.768K-BD-T
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: 25 %; Frequency Adjustment (Mechanical): NO; Nominal Supply Voltage: 3.3 V;
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