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
SPI235-18 by Onsemi is a Transistor with 20V Max On State Voltage, 0.000005s Max Response Time, and 2mm Gap Size. Ideal for optoelectronic applications, it operates b/w -20 °C to 80°C temperature range.
Median Price
-
Lifecycle Status
Suppliers In-Stock
2
In-Stock Inventory
1k+
Vyrian
1+ parts
100+ parts
1k+ parts
10k+ parts
Digiode
Problanco Electronics
Kulean Microsystems
Kepictronics
TANS Electronics
Corphita
SupplyDigital Components
UHIMA Technologies
Corohmni
This product can handle a maximum on state voltage of 20 V, making it suitable for a wide range of applications.
The use of a transistor in the output circuit provides efficient control and amplification of signals.
With a maximum operating temperature of 80 °C, this product can withstand high temperature environments.
The ability to operate at temperatures as low as -20 °C makes this product suitable for use in cold environments.
With a very fast maximum response time of 0.000005 seconds, this product can quickly react to input signals.
The through hole mounting feature makes it easy to securely install this product on a circuit board.
The 2 mm gap size ensures proper spacing and insulation between components, preventing interference and short circuits.
Other Function Optoelectronics SPI235-18 attributes and parameters. Explore more Other Function Optoelectronics devices from Onsemi
Gap Size:
Mounting Feature:
Maximum On State Voltage:
Maximum Operating Temperature:
Minimum Operating Temperature:
Output Circuit Type:
Maximum Response Time:
Sub-Category:
SPI235-18 Optoelectronics trade compliance attributes, and parameters.
HTS
8541.40.80.00
SB
Established in 1999, Onsemi is a leading global provider of power and image-sensing technologies. They are dedicated to building a better future for the automotive, industrial, cloud, medical, and IoT markets. Onsemi's core technologies include analog, digital, and mixed-signal products that offer innovative solutions for advanced automotive systems; highly reliable power management products for industrial applications; low-cost imaging solutions for medical equipment and consumer electronics; and robust communication architectures for the Internet of Things (IoT).
President, CEO
Hassane El-Khoury
Executive VP, CFO, Treasurer
Thad Trent
Senior VP
Ross F. Jatou
Aizu Fab
Fabrication
Fab Initiation
1995
Japan
Aizu Wakamatsu
Wafer Capacity
52,000
Si/EPI Fab
2018
Czech Republic
Rožnov pod Radhoštěm
10,000
Expansion Phase 1 for SiC / EPI
2019
14,500
Expansion Phase 2 for SiC / EPI
2024
SiC Fab
2022
USA
Hudson
Bucheon
2013
South Korea
61,000
ISMF - Malaysia
1990
Malaysia
Seremban
95,000
Roznov Device Fab
1987
80,000
Fab 10
2002
East Fishkill
15,000
Burlington
1986
Canada
Gresham
1998
45,000
Bucheon 150mm
2000
50,000
Rochester
1983
Nampa
Pennsylvania
1997
Mountain Top
36,000
2N2222A
Tesla Elektronicke Soucastky
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
LM358N
Silicon Group
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: THROUGH-HOLE; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR;
Taejin Technology
OPERATIONAL AMPLIFIER; Temperature Grade: AUTOMOTIVE; Terminal Form: THROUGH-HOLE; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR;
1N4148WS
Eic Semiconductor
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: FLAT; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
M39029/58-360
Glenair
CONNECTOR ACCESSORY; Contact Gender: MALE; Material: COPPER ALLOY; IEC Conformity: NO; MIL-Connector Accessory Name: CONTACT; MIL Conformity: YES;
2N7002
Itt Semiconductor
N-CHANNEL; Configuration: SINGLE; Surface Mount: YES; Package Body Material: PLASTIC/EPOXY; Field Effect Transistor Technology: METAL-OXIDE SEMICONDUCTOR; Package Shape: RECTANGULAR;
LD1117S33TR
STMicroelectronics
LD1117S33TR by STMicroelectronics is a fixed positive single output LDO regulator with a nominal output voltage of 3.3V and max output current of 1.3A. It has a small outline package style, operates at an adjustable temperature range from 0 to 125°C, and is ideal for applications requiring stable voltage regulation in compact electronic devices.
LM358AN
Onsemi
SMBJ18CA
Telefunken Microelectronics
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
1N4148
Central Semiconductor
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
BAV99
Panjit International
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 3; Surface Mount: YES; Package Shape: RECTANGULAR;
OPA2227UA
Burr-Brown Corporation
OPERATIONAL AMPLIFIER; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR;
AT90CAN128-16AU
Microchip Technology
AT90CAN128-16AU by Microchip Technology is a microcontroller with 8-bit data RAM and 16-bit address bus width. It operates at a max clock frequency of 16 MHz, making it suitable for industrial applications requiring low power mode and connectivity options like CAN, SPI, and USART. With 53 I/O lines and 8-channel 10-bit ADCs, this microcontroller offers versatile peripheral support for various embedded systems.
LM2931AZ-5.0RPG
LM2931AZ-5.0RPG by Onsemi is a Fixed Positive Single Output LDO Regulator with 5V nominal output voltage and 0.1A max output current. It features a low dropout voltage of 0.6V, making it suitable for applications requiring stable power supply in temperature range from -40 to 125°C. The package style is cylindrical with matte tin terminal finish, ideal for various electronic devices needing precise voltage regulation.
RC0603FR-071KL
Yageo
Yageo's RC0603FR-071KL is a fixed resistor with 1000 ohm resistance, 1% tolerance, and 0.1 W power dissipation. Ideal for surface mount applications in electronics, it operates b/w -55 to 155 °C with a temperature coefficient of 100 ppm/°C.
LM555CN
Rca Solid State
Analog Waveform Generation Functions; Temperature Grade: COMMERCIAL; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR; Surface Mount: NO;
USBLC6-2SC6
USBLC6-2SC6 by STMicroelectronics is a unidirectional transient voltage suppressor diode with a breakdown voltage of 6V. It has a max clamping voltage of 17V and operates in temperatures ranging from -40 to 125°C. This device, with dual terminals and matte tin finish, is ideal for protecting sensitive electronics from voltage spikes in various applications.
OHN3020U
Tt Electronics Plc
OHN3020U by Tt Electronics Plc is a magnetic field sensor with a max supply voltage of 24V and hysteresis of 5mT. It features an output range of 25mA and operates in temperatures ranging from -20 to 85°C. Ideal for applications requiring precise detection and measurement of magnetic fields, such as automotive sensors or industrial automation systems.
SS14
Sensitron Semiconductor
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
Grande Electronics
V23845-B1532
Infineon Technologies
OPTOELECTRONIC DEVICE;
SG260
Kodenshi Auk
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Operating Temperature: 85 Cel; Maximum On State Voltage: 30 V; Minimum Operating Temperature: -20 Cel; Gap Size: 3 mm;
HEDL-5540#A14
Hewlett Packard
OPTOELECTRONIC DEVICE; Maximum Operating Temperature: 70 Cel; Configuration: SINGLE, 3 CHANNELS; Minimum Operating Temperature: 0 Cel; No. of Functions: 1;
IL300-F-X007T
Vishay Intertechnology
Vishay Intertechnology's IL300-F-X007T is a dual optocoupler with 0.06A forward current, ideal for surface mount applications. Featuring a max isolation voltage of 5300V and operating temperature range from -55 to 100°C, it offers reliable performance in various optoelectronic setups.
4464
Standish L C D
Other Optoelectronics;
SL1180-22
SL1180-22 by Onsemi is a 7 SEG NUMERIC LED DISPLAY with peak wavelength of 700nm. It has common cathode configuration, red color at wavelength, and 8mm display height. Ideal for applications requiring temperature range from -25 °C to 70°C.
IL300-F
Siemens
Photodiode Output Optocoupler; Mounting Feature: THROUGH HOLE MOUNT; Terminal Finish: Matte Tin (Sn); Maximum Operating Temperature: 100 Cel; No. of Functions: 1; No. of Elements: 1;
IL300
IL300 by Siemens is a dual, simultaneous operation optocoupler with a max forward current of 0.06 A. It has a photodiode output and a max operating temperature of 100°C. The optocoupler has a matte tin terminal finish and a max power dissipation of 0.05 W. It offers a max isolation voltage of 5300 V and can be mounted through a hole. Suitable for applications requiring optoelectronic isolation.
1882.2781
Mentor & Prazisions Bauteile Kg
1882.2781 by Mentor & Prazisions Bauteile Kg is an optoelectronic component with peak wavelength of 660nm, operating from -40°C to 85°C. It features a tin/lead terminal finish, emits green/red/yellow light at 0.001cd luminous intensity, and has 3 LEDs in array with max forward voltage of 2V. Ideal for applications requiring precise optical signaling in various temperature conditions.
SLA8663
Other Optoelectronics; No. of LEDs in Array: 10; Color At Wavelength: Red; Peak Wavelength (nm): 660;
LS5180J
Other Optoelectronics; Lens Type: DIFFUSED; Terminal Finish: Tin/Lead (Sn/Pb); Maximum Forward Current: .045 A; Peak Wavelength (nm): 590; Maximum Operating Temperature: 100 Cel;
PSD302-12LM
Other Optoelectronics; Terminal Finish: TIN LEAD; JESD-609 Code: e0;
MSD2310TXV
Other Optoelectronics; Terminal Finish: Tin/Lead (Sn/Pb); No. of Characters: 4; Minimum Operating Temperature: -55 Cel; Maximum Forward Voltage: 2 V; Configuration: N/A;
NSL-4960
Advanced Photonix
OPTOELECTRONIC DEVICE; Terminal Finish: Tin/Lead (Sn/Pb); JESD-609 Code: e0;
SPI228
SPI228 by Onsemi is a transistor optoelectronic component with max on-state voltage of 20V and current of 0.005A. It operates b/w -25 °C to 80°C, with response time of 5μs. Ideal for applications requiring through-hole mounting, such as industrial control systems.
TIL148
Texas Instruments
TIL148 by Texas Instruments is a transistor optoelectronic component with max on-state voltage of 30V and forward current of 0.1A. It operates in temperatures from -40°C to 100°C, with response time of 5μs. Ideal for applications requiring fast switching speeds and precise control in through-hole mounting setups with a gap size of 2.54mm.
HCNR200-000E
Broadcom
HCNR200-000E by Broadcom is a single optoelectronic device with 8 terminals. It has a max forward current of 0.025A and isolation voltage of 5000V. Ideal for applications requiring through hole mounting, with operating temperatures ranging from -40 to 85°C.
SRP00255H
XMLDCL-H0-0000-00A4AAAE5
Cree Led
MULTIPLE COLOR LED;
MSD2313TXV
Other Optoelectronics; Terminal Finish: Tin/Lead (Sn/Pb); Color At Wavelength: Green; Minimum Operating Temperature: -55 Cel; Configuration: N/A; Maximum Operating Temperature: 100 Cel;
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
SPI202
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Response Time: .00003 s; Maximum On State Current: .003 A; Maximum Operating Temperature: 80 Cel; Output Circuit Type: Transistor;
SPI204
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Output Circuit Type: Transistor; Maximum On State Voltage: 20 V; Maximum Response Time: .00003 s; Maximum Operating Temperature: 85 Cel;
SPI206
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Minimum Operating Temperature: -25 Cel; Maximum Operating Temperature: 85 Cel; Gap Size: 3 mm; Maximum Response Time: .00003 s;
SPI206-10
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Minimum Operating Temperature: -25 Cel; Gap Size: 3 mm; Maximum Response Time: .00003 s; Output Circuit Type: Transistor;
SPI208
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Response Time: .00003 s; Gap Size: 3 mm; Minimum Operating Temperature: -25 Cel; Maximum Operating Temperature: 85 Cel;
SPI212
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Output Circuit Type: Transistor; Maximum On State Voltage: 20 V; Minimum Operating Temperature: -25 Cel; Maximum Operating Temperature: 85 Cel;
SPI214
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum On State Current: .006 A; Gap Size: 3.5 mm; Maximum Response Time: .00003 s; Minimum Operating Temperature: -25 Cel;
SPI214-10
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum On State Voltage: 20 V; Maximum Operating Temperature: 85 Cel; Minimum Operating Temperature: -25 Cel; Gap Size: 3 mm;
SPI216
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Operating Temperature: 80 Cel; Maximum Response Time: .00003 s; Maximum On State Voltage: 20 V; Output Circuit Type: Transistor;
SPI226
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Operating Temperature: 80 Cel; Minimum Operating Temperature: -25 Cel; Maximum On State Voltage: 20 V; Maximum On State Current: .006 A;
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Operating Temperature: 80 Cel; Output Circuit Type: Transistor; Maximum On State Current: .005 A; Maximum Response Time: .000005 s;
SPI230
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum On State Voltage: 20 V; Maximum On State Current: .008 A; Maximum Operating Temperature: 80 Cel; Maximum Response Time: .00001 s;
SPI232
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Output Circuit Type: Transistor; Gap Size: 3.5 mm; Maximum Operating Temperature: 80 Cel; Maximum On State Current: .008 A;
SPI236-15
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Minimum Operating Temperature: -20 Cel; Gap Size: 2 mm; Maximum Operating Temperature: 80 Cel; Maximum Response Time: .0001 s;
SPI-236-17
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum On State Voltage: 20 V; Maximum Operating Temperature: 80 Cel; Minimum Operating Temperature: -20 Cel; Output Circuit Type: Transistor;
SPI237
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum On State Voltage: 5 V; Maximum Operating Temperature: 80 Cel; Maximum On State Current: .00004 A; Minimum Operating Temperature: -20 Cel;
SPI237-20
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Minimum Operating Temperature: -20 Cel; Maximum Operating Temperature: 80 Cel; Maximum On State Voltage: 5 V; Maximum On State Current: .00004 A;
SPI-240-15-T1
Other Optoelectronics; Mounting Feature: SURFACE MOUNT; Maximum Operating Temperature: 80 Cel; Output Circuit Type: Darlington; Gap Size: 3 mm; Maximum On State Voltage: 20 V;
SPI235-18
Sanyo Electric
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Output Circuit Type: Transistor; Maximum Response Time: .000005 s; Maximum On State Voltage: 20 V; Maximum Operating Temperature: 80 Cel;
Other Optoelectronics; Mounting Feature: THROUGH HOLE MOUNT; Maximum Response Time: .000005 s; Maximum On State Current: .00004 A; Maximum On State Voltage: 5 V; Maximum Operating Temperature: 80 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