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
Z84C40BD6 by STMicroelectronics is a Serial Communication Controller with 5V power supply, 40 terminals, and 6MHz clock frequency. It supports communication protocols like ASYNC, SYNC, HDLC, and X.25. Ideal for industrial applications requiring low power consumption and high data transfer rates up to 0.09765625 MBps.
Median Price
-
Lifecycle Status
Suppliers In-Stock
3
In-Stock Inventory
1k+
Vyrian
1+ parts
100+ parts
1k+ parts
10k+ parts
Anansix
Digiode
IDEA Electronic Components Group
$53.360
$48.024
MKK Technologies
$100.340
DigiPath Technology Company
Corphita
Parana Technologies
$63.800
The ceramic and metal-sealed cofired package body material provides durability and reliability, making this product suitable for harsh operating environments.
The high maximum supply voltage allows for versatility in power supply options, accommodating a range of applications.
The rectangular package shape offers ease of integration and space-saving design for efficient PCB layout.
The NRZ data encoding or decoding method ensures efficient and reliable data transmission, enhancing overall communication performance.
Support for a wide range of communication protocols enables seamless integration with diverse systems and networks.
The CMOS technology offers low power consumption, optimizing energy efficiency and extending battery life in portable devices.
The high maximum clock frequency ensures fast data transfer rates, enhancing the overall performance of the product.
The presence of serial IO/communication controller functionality makes this product well-suited for a wide range of serial communication applications.
Having 2 serial I/Os allows for more flexible connectivity options and simultaneous data transfer capabilities.
The low power mode feature further enhances energy efficiency, making this product ideal for battery-powered devices or applications requiring minimal power consumption.
Serial Communication Controllers Z84C40BD6 attributes and parameters. Explore more Serial Communication Controllers devices from STMicroelectronics
Additional Features:
Address Bus Width:
Boundary Scan:
Bus Compatibility:
Maximum Clock Frequency:
Communication Protocol:
Data Encoding or Decoding Method:
Maximum Data Transfer Rate:
External Data Bus Width:
JESD-30 Code:
JESD-609 Code:
Low Power Mode:
No. of DMA Channels:
No. of I/O Lines:
No. of Serial I/Os:
No. of Terminals:
On Chip Data RAM Width:
Maximum Operating Temperature:
Minimum Operating Temperature:
Package Body Material:
Package Code:
Package Equivalence Code:
Package Shape:
Package Style (Meter):
Power Supplies (V):
Qualification:
RAM Words:
Sub-Category:
Maximum Supply Current:
Maximum Supply Voltage:
Minimum Supply Voltage:
Nominal Supply Voltage:
Surface Mount:
Technology:
Temperature Grade:
Terminal Finish:
Terminal Form:
Terminal Pitch:
Terminal Position:
Width:
Peripheral IC Type:
Z84C40BD6 Peripheral ICs trade compliance attributes, and parameters.
HTS
8542.31.00.01
SB
8542.31.00.00
STMicroelectronics is a global leader in the semiconductor manufacturing industry, with over 35 years of experience providing innovative and advanced technologies for customers around the world. Headquartered in Netherlands, STMicroelectronics has more than 51,323 employees worldwide and operates across 32 countries all over Europe, Asia-Pacific and the Americas. The company’s portfolio includes integrated circuits, discrete components, application-specific standard products, and computer chipsets. STMicroelectronics serves a wide range of industries such as automotive, consumer markets, healthcare and industrial applications.
President, CEO
Jean-Marc Chery
President, CFO, Finance, Purchasing,Enterprise Risk Management & Resilience
Lorenzo Grandi
President, Sales & Marketing
Jerome Roux
Castelletto
Fabrication
Fab Initiation
1968
Italy
Wafer Capacity
SGFAB AMK 6
2000
Singapore
29,000
AG200
Agrate Brianza
14,000
RST 8
France
Rousset
35,000
Crolles 1
1993
Crolles
30,000
Crolles 2-ext. mod 5
Crolles 2-ext. mod 2
2022
Crolles 2-ext. mod 3
2023
Crolles 2
2004
28,000
1985
SiC Fab
2006
Sweden
Norrköping
10,000
Fab 3
2005
Tours
2,000
Fab 1 & Fab 2
1978
55,000
Fab 2
1997
Catania
SGFAB-AMK 6E
2003
145,000
SGFAB-AMJ 9
1984
152,000
AG300 (R3)
1980
25,000
1987
34,000
AG300
2024
Crolles 2-ext. mod 1
2020
Fab 1 6-inch fab
2013
11,000
SiC 6-inch line
2021
2,500
200mm GaN
2018
SGFAB-AMK 8
2001
Crolles 2- JV Fab
SGFAB-AMK 6
2016
38,125
SGFAB-AMK 2E
2010
20,000
Silicon Carbide A.B.
SiC wafer/EPI Fab
SiC Device Fab
2025
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.
2N7002
NXP Semiconductors
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .83 W; JESD-609 Code: e3; Minimum DS Breakdown Voltage: 60 V;
CRCW080510K0FKEA
Vishay Intertechnology
Vishay Intertechnology's CRCW080510K0FKEA is a fixed resistor with 10000 ohm resistance, 1% tolerance, and 0.125 W power dissipation. Ideal for surface mount applications in automotive electronics due to AEC-Q200 reference standard compliance and -55 to 155 °C operating temperature range.
Comchip Technology
N-CHANNEL; Configuration: SINGLE; Surface Mount: YES; Maximum Power Dissipation (Abs): .2 W; Maximum Operating Temperature: 150 Cel; Operating Mode: ENHANCEMENT MODE;
STM32H743ZIT6
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.
LL4148
Silicon Standard
RECTIFIER DIODE; Terminal Position: END; Terminal Form: WRAP AROUND; No. of Terminals: 2; Surface Mount: YES; Package Shape: ROUND;
SMBJ18CA
Protek Devices
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
1N4148WS
Jiangsu Changjiang Electronics Technology
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
LM317T
Bay Linear
Other Regulators; No. of Terminals: 3; No. of Outputs: 1; Surface Mount: NO; Maximum Load Regulation (%): 1.5 %; Operating Temperature (TJ-Min): 0 Cel;
Changzhou Galaxy Century Microelectronics
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Minimum DS Breakdown Voltage: 60 V; Maximum Time At Peak Reflow Temperature (s): NOT SPECIFIED; No. of Terminals: 3;
C1206C104M5RACTU
KEMET Corporation
KEMET C1206C104M5RACTU is a ceramic capacitor with 0.1uF capacitance and 50V rated DC voltage. It has X7R temperature characteristics, -55 to 125°C operating range, and ±20% tolerance. Ideal for surface mount applications in electronics requiring stable capacitance across temperatures.
CGA3E2X7R1H104K080AA
TDK
CGA3E2X7R1H104K080AA by TDK is a fixed ceramic capacitor with a capacitance of 0.1 uF and a rated DC voltage of 50 V. It has a temperature coefficient of 15% and can operate at temperatures ranging from -55 to 125 °C. This capacitor is commonly used in surface mount applications for various electronic devices.
1554216002
Molex
WIRE AND CABLE;
2N2222A
Raytheon Semiconductor
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 250 MHz; Minimum DC Current Gain (hFE): 100; Maximum Turn On Time (ton): 35 ns;
Comset Semiconductors
Other Regulators; No. of Terminals: 3; Terminal Pitch: 2.54 mm; Minimum Output Voltage-1: 1.2 V; Technology: BIPOLAR; Operating Temperature (TJ-Max): 125 Cel;
1N4148
Synsemi
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
STM8S003F3P6TR
STM8S003F3P6TR by STMicroelectronics is an 8-bit microcontroller with a max clock frequency of 16 MHz. It features 1024 RAM bytes, 128 data EEPROM size, and 5-ch 10-bit ADC channels. Ideal for industrial applications requiring low power mode and connectivity via I2C, SPI, and UART interfaces.
Supertex
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .2 W; No. of Elements: 1; Maximum Feedback Capacitance (Crss): 5 pF;
FT232RL-REEL
FTDI
FTDI's FT232RL-REEL is a bus controller with 28 terminals, operating at 3.3V to 5.25V. It supports USB, VBUS, and UART buses with a data transfer rate of 60MBps. Ideal for industrial applications due to its CMOS technology and compatibility with RS232, RS422, and RS485 standards.
BSS123,215
NXP Semiconductors' BSS123,215 is a N-CHANNEL FET for SWITCHING applications. Features include 100V DS Breakdown Voltage, 0.17A Drain Current, and 6 ohm On Resistance. With GULL WING terminals and ENHANCEMENT MODE operation, it's ideal for small outline packages in various electronic devices.
SC16C650BIBS,128
SC16C650BIBS,128 by NXP Semiconductors is a Serial Communication Controller with 32 terminals and 8-bit external data bus width. It operates b/w -40 to 85 °C, supporting a max clock frequency of 48 MHz for communication protocols like ASYNC and BIT. Ideal for industrial applications requiring low power mode and high-speed data transfer up to 0.375 MBps.
SCC2691AC1D24
SCC2691AC1D24 by NXP Semiconductors is a Serial Communication Controller with 5V power supply, 4 MHz clock frequency, and 0.0046875 MBps data transfer rate. It is used for asynchronous communication protocols in commercial-grade applications requiring low power mode.
HS4-3282-8
Harris Semiconductor
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: MILITARY; Terminal Form: NO LEAD; No. of Terminals: 44; Package Shape: SQUARE; Terminal Finish: Tin/Lead (Sn/Pb);
WGI210ITSLJXS
Intel
The Intel WGI210ITSLJXS is a Serial IO/Communication Controller with 64 terminals, operating at temperatures from -40 to 85°C. It supports I2C communication protocol and PCI bus compatibility, featuring low power mode for industrial applications. The chip carrier package style makes it suitable for surface mount in various electronic devices.
MAX3100CPD
Maxim Integrated
MAX3100CPD by Maxim Integrated is a Serial Communication Controller with 14 terminals, operating at 3.6864 MHz clock frequency. It supports ASYNC and BIT communication protocols, with data transfer rate of 0.028125 MBps. Ideal for applications requiring low power consumption and reliable serial IO/communication control in commercial temperature grades.
XR17V358IB176-F
Exar
Exar's XR17V358IB176-F is a serial communication controller with 3.125 MBps data rate, 8 serial I/Os, and 1.2 V supply voltage. Ideal for PCI bus compatibility in industrial applications due to its low power mode and CMOS technology.
8101
Lsi
SERIAL IO/COMMUNICATION CONTROLLER, LAN; Temperature Grade: COMMERCIAL; Terminal Form: GULL WING; No. of Terminals: 208; Package Code: FQFP; Package Shape: SQUARE;
XR88C681J-F
Maxlinear
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: INDUSTRIAL; Terminal Form: J BEND; No. of Terminals: 44; Package Code: QCCJ; Package Shape: SQUARE;
XR16C2850IM48
Exar's XR16C2850IM48 is a Serial Communication Controller with 3.3/5V power supplies, supporting data rates up to 0.78125 MBps. Ideal for industrial applications, it operates in temperatures ranging from -40 to 85 °C and features low power mode for energy efficiency.
SJA1000T
Philips Semiconductors
SERIAL IO/COMMUNICATION CONTROLLER, LAN; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 28; Package Code: SOP; Package Shape: RECTANGULAR;
CY7C9689A-AXC
Cypress Semiconductor
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: COMMERCIAL; Terminal Form: GULL WING; No. of Terminals: 100; Package Code: LFQFP; Package Shape: SQUARE;
HI-8282APQI-10
Hokuriku Electric Industry
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 44; Package Code: QFP; Package Shape: SQUARE;
MAX3111ECNI
MAX3111ECNI by Maxim Integrated is a Serial Communication Controller with 28 terminals, operating at 3.3V and 4.5-5.5V supply voltage range. It is used in applications requiring SERIAL IO/COMMUNICATION CONTROLLER technology, with temperature range of 0-70°C and PLASTIC/EPOXY package material.
SCD240110QCM
The Intel SCD240110QCM is a Serial Communication Controller with 16-bit address bus width and max data transfer rate of 0.01640625 MBps. It operates at temperatures b/w 0 to 70 °C and supports communication protocols like ASYNC, BIT; SYNC, HDLC; X.21. Ideal for applications requiring high-speed serial I/O communication in commercial-grade devices.
SC16C554DBIB64,157
NXP Semiconductors SC16C554DBIB64,157 is a Serial Communication Controller with 3.63V max supply voltage and 0.625 MBps data transfer rate. It is used in industrial applications for asynchronous communication at up to 80 MHz clock frequency.
SC16IS752IBS,128
SC16IS752IBS,128 by NXP Semiconductors is a Serial Communication Controller with 2 address bus width and 32 terminals. It operates at a max clock frequency of 80 MHz and supports communication protocols like ASYNC and BIT. Ideal for industrial applications requiring low power mode and high data transfer rates up to 0.625 MBps.
SC16C754BIB80
SC16C754BIB80 by NXP Semiconductors is a Serial Communication Controller with 3.63V max supply voltage, 0.625 MBps data transfer rate, and 80 MHz clock frequency. Ideal for industrial applications requiring high-speed asynchronous communication with low power consumption in a compact package.
IM6402IJL
General Electric Solid State
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: INDUSTRIAL; Terminal Form: THROUGH-HOLE; No. of Terminals: 40; Package Code: DIP; Package Shape: RECTANGULAR;
LAN91C111I-NE
Standard Microsystems
LAN91C111I-NE by Standard Microsystems is a Serial Communication Controller with 3.3V power supply, 12.5 MBps data transfer rate, and 25 MHz clock frequency. It is ideal for industrial applications requiring low power mode, compatible with ARM, SH, POWERPC processors for efficient serial I/O communication.
TIR2000
Texas Instruments
TIR2000 by Texas Instruments is a Serial Communication Controller with 64 terminals in a flatpack, low profile package. It offers a max data transfer rate of 0.5 MBps and operates at a nominal voltage of 3.3 V. Ideal for applications requiring high-speed serial I/O communication in compact electronic devices.
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
Z84C4006PEG
IXYS Corporation
Z84C4206PEG
Z84C4010PEG
Z84C4010PEG by IXYS Corp is a Serial Communication Controller with 40 terminals, operating at 4.5-5.5V, and supports data rates up to 0.25 MBps. Widely used in industrial applications for asynchronous/synchronous communication protocols like ASYNC, BIT; SYNC, BYTE; X.25 etc., with low power mode feature.
Z84C42BB6
Z84C42AD2
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: MILITARY; Terminal Form: THROUGH-HOLE; No. of Terminals: 40; Package Code: WDIP; Package Shape: RECTANGULAR;
Z84C41AB6
Z84C42BD2
Z84C40AD6
SERIAL IO/COMMUNICATION CONTROLLER, SERIAL; Temperature Grade: INDUSTRIAL; Terminal Form: THROUGH-HOLE; No. of Terminals: 40; Package Code: WDIP; Package Shape: RECTANGULAR;
Z84C41AD6
Z84C41BB6
Z84C40BB6
Z84C41BD2
Z84C42AB6
Z84C42AD6
Z84C40AD2
Z84C41AD2
Z84C40AB6
Z84C40BD2
Z84C41BD6
Z84C4004PEC
Zilog
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