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
Abracon's AST3TQ53-T-25.000MHZ-1-C TCXO Clock Oscillator offers 0.1% frequency stability, 3.465V max supply voltage, and 1 PPM aging rate. Ideal for applications requiring precise timing at a nominal frequency of 25MHz in a compact 5mm x 3.2mm x 2mm surface-mount package.
Median Price
$53.272
Lifecycle Status
Suppliers In-Stock
3
In-Stock Inventory
1k+
Nova Conductors
1+ parts
100+ parts
-
1k+ parts
10k+ parts
VNN
Vyrian
Ampacity Inc.
$1.010
AZTECH Wire
$13.644
Continental Prestige Electronics
$52.206
Argo Parts USA
Bastille Electronics
Provides high accuracy in maintaining the frequency over time, ensuring reliable performance.
Allows compatibility with a wide range of power supply systems, increasing flexibility in usage.
Low aging rate ensures long-term frequency stability, making it a durable choice for applications requiring precision timing.
Suits various electrical circuits by providing appropriate output load impedance, enhancing compatibility.
Efficient power consumption allows for energy savings and prolonged battery life in portable devices.
Standard supply voltage ensures easy integration into existing systems without the need for additional components.
CMOS technology offers low power consumption and high noise immunity, making the oscillator energy-efficient and reliable.
Simple design with a limited number of terminals simplifies installation and integration, reducing complexity.
Fast rise time ensures quick signal transitions, improving the overall performance of the oscillator.
Compact size allows for easy placement on circuit boards, saving space in electronic devices.
Wide operating voltage range enables stable operation even in fluctuating power supply conditions.
High operating temperature range allows for use in various environments without compromising performance.
Wide temperature range ensures reliable operation in extreme cold conditions, making it suitable for outdoor applications.
Standard frequency facilitates compatibility with other components in the system, ensuring seamless integration.
Fast fall time complements the rise time, contributing to quick signal transitions for improved signal integrity.
High symmetry ensures balanced signal output, reducing signal distortion and enhancing overall accuracy.
Surface mount design simplifies installation on PCBs, allowing for automated assembly and reducing production costs.
TCXO Clock Oscillators AST3TQ53-T-25.000MHZ-1-C attributes and parameters. Explore more TCXO Clock Oscillators devices from Abracon
Aging:
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 Equivalence Code:
Physical Dimension:
Maximum Rise Time:
Maximum Supply Current:
Maximum Supply Voltage:
Minimum Supply Voltage:
Nominal Supply Voltage:
Maximum Symmetry (%):
Abracon is a trusted supplier of leading-edge and innovative electronic components including Frequency Control, Timing, Power, Magnetics, RF and Antenna solutions. Servicing world-class companies across the data communication, transportation, industrial, medical, consumer, aerospace, and defense industries, Abracon accelerates customers’ time-to-market by providing unmatched product solutions, technical expertise, and service excellence.
MBRS130LT3G
Onsemi
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.
LM358D-T
Philips Semiconductors
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: GULL WING; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR;
ULN2803A
Motorola
NPN; Configuration: 8 BANKS, DARLINGTON WITH BUILT-IN DIODE AND RESISTOR; Surface Mount: NO; Maximum Collector Current (IC): .5 A; Terminal Position: DUAL; JESD-30 Code: R-PDIP-T18;
M24308/2-1F
Bel Fuse
D SUBMINIATURE CONNECTOR; Option: GENERAL PURPOSE; Contact Gender: FEMALE; Dielectric Withstanding Voltage (V): 1750VAC; No. of Connectors: ONE; Mixed Contacts: NO;
1N4148WSF-7
Diodes Incorporated
1N4148WSF-7 by Diodes Inc. is a single silicon rectifier diode with max output current of 0.25A and max reverse voltage of 100V. It operates b/w -55 to 150°C, has a small outline package style, and is suitable for surface mount applications in various electronic circuits.
2N7002
Vishay Intertechnology
2N7002 by Vishay Intertechnology is a N-CHANNEL FET with 60V DS Breakdown Voltage, 0.115A Drain Current, and 7.5 ohm On Resistance. Ideal for SWITCHING applications due to its SINGLE configuration with BUILT-IN DIODE. Operates in ENHANCEMENT MODE, suitable for surface mount with GULL WING terminals.
Itt Semiconductor
N-CHANNEL; Configuration: SINGLE; Surface Mount: YES; Package Body Material: PLASTIC/EPOXY; Field Effect Transistor Technology: METAL-OXIDE SEMICONDUCTOR; Package Shape: RECTANGULAR;
MBRM140T1G
MBRM140T1G by Onsemi is a Schottky rectifier diode with 40V max repetitive peak reverse voltage, 1A max output current, and 0.3V max forward voltage. It is used in applications requiring small outline surface mount diodes for efficient power management.
BSS138DW-7-F
BSS138DW-7-F by Diodes Incorporated is a N-channel small signal FET with a min DS breakdown voltage of 50V. It is used for switching applications and operates in enhancement mode. This surface mount transistor has a max drain current of 0.2A and a max power dissipation of 0.2W.
M39029/56351
Souriau-sunbank Connection Technologies
Souriau-sunbank's M39029/56351 is a CRIMP contact type backshell accessory compliant with MIL-DTL-38999. It features FEMALE gender contacts, compatible with M39029/58363 mating contacts. The insertion and removal tools required are M81969/14-10 and M22520/2-10 respectively, making it ideal for military connector applications.
FDV303N
Fairchild Semiconductor
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .35 W; Transistor Application: SWITCHING; JESD-609 Code: e3;
CRG0805F10K
TE Connectivity
TE Connectivity's CRG0805F10K is a 10000 ohm fixed resistor with 1% tolerance. It operates b/w -55 to 155 °C and has a power dissipation of 0.125 W. Ideal for surface mount applications in various electronic circuits due to its compact size and high temperature rating.
NE555D
Analog Waveform Generation Functions; Temperature Grade: COMMERCIAL; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR; Surface Mount: YES;
BAV99
National Semiconductor
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 3; Surface Mount: YES; Package Shape: RECTANGULAR;
Adi Electronics
D SUBMINIATURE CONNECTOR; Option: GENERAL PURPOSE; Contact Gender: FEMALE; MIL Conformity: YES; Filter Feature: NO; Mating Info.: MULTIPLE MATING PARTS AVAILABLE;
LAN8720A-CP-TR
Microchip Technology
LAN8720A-CP-TR by Microchip: Ethernet transceiver with 100 Mbps data rate, operates at 3.3V, and consumes 54mA max supply current. Ideal for network interfaces in commercial applications due to its small size (4x4mm) and low power consumption.
SS14
General Semiconductor
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
SMBJ18CA
Weitron Technology
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
1N4148WS
Rochester Electronics
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: FLAT; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
LL4148
Leshan Radio
RECTIFIER DIODE; Surface Mount: YES; Maximum Non Repetitive Peak Forward Current: 2 A; Maximum Reverse Recovery Time: .004 us; No. of Phases: 1; Maximum Operating Temperature: 175 Cel;
SIT5157AI-FK-33N0-100.000000
Sitime
SIT5157AI-FK-33N0-100.000000 by Sitime is a TCXO Clock Oscillator with 0.5% Frequency Stability, 3.63V Max Supply Voltage, and 1 PPM/YEAR Aging. Ideal for applications requiring precise timing such as telecommunications, networking equipment, and industrial automation systems due to its LVCMOS Oscillator Type and 100MHz Nominal Operating Frequency.
SIT5156AI-FK-33E0-25.000000X
SIT5156AI-FK-33E0-25.000000X by Sitime is a TCXO Clock Oscillator with 25MHz frequency, 0.5% stability, and LVCMOS type. Ideal for applications requiring precise timing in temperature-sensitive environments due to its 1PPM aging, ceramic package, and operating range of -40°C to 85°C.
AST3TQ53-T-25.000MHZ-1-C
Abracon
ETXO-H33CL-50.000
Ecs International
ETXO-H33CL-50.000 by Ecs International is a TCXO Clock Oscillator with 2.5% Frequency Stability, 1 PPM/YEAR Aging, and HCMOS Oscillator Type. Ideal for applications requiring precise timing at 50 MHz frequency in a compact 3.2mm x 2.5mm x 1.6mm ceramic package for surface mount installations.
DS32KHZ/WBGA+
Maxim Integrated
TCXO, Clock;
DS4000A0/BGA
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 24; Frequency Stability: 1 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/YEAR;
DS76KHZ
TTL; Mounting Feature: SURFACE MOUNT; No. of Terminals: 6; Frequency Stability: 7.5 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/YEAR;
581L24C02CTT
Cts
581L24C02CTT by Cts is a TCXO Clock Oscillator with 0.2% Frequency Stability, 3 PPM/20 YEAR Aging, and 24.576 MHz Nominal Operating Frequency. Ideal for applications requiring precise timing such as telecommunications, networking equipment, and industrial automation systems.
T200F-024.576M
Connor Winfield
T200F-024.576M by Connor Winfield is a TCXO Clock Oscillator with 24.576 MHz frequency stability of 0.2%, ideal for applications requiring precise timing. It operates at a nominal voltage of 3.3V, with low aging rate of 0.04 PPM/DAY and LVCMOS oscillator type, making it suitable for various electronic devices. The compact ceramic package measures 7mm x 5mm x 2.4mm and can withstand temperatures from -40 to 85 °C, featuring surface mounting feature for easy installation.
SIT5002AI-3E-33E0-100.000000T
SIT5002AI-3E-33E0-100.000000T by Sitime is a TCXO Clock Oscillator with 5% Frequency Stability, 3.63V Max Supply Voltage, and 2.5 PPM/YEAR Aging. Ideal for applications requiring precise timing such as telecommunications equipment, networking devices, and industrial automation systems.
DS4000CW/BGA
VT-501-EAE-2560-10M0000000
VT-501-EAE-2560-10M0000000 by Microchip Technology is a TCXO Clock Oscillator with 2.5% Frequency Stability, 1 PPM/YEAR Aging, and 3.465 V Max Supply Voltage. Ideal for applications requiring precise timing in temperature-sensitive environments.
LFTCXO063712BULK
Iqd Frequency Products
LFTCXO063712BULK by Iqd Frequency Products is a TCXO Clock Oscillator with 0.28% frequency stability, 3.465V max supply voltage, and 1 PPM/year aging. Ideal for applications requiring precise timing such as telecommunications equipment, test instruments, and industrial controllers.
SIT5002AI-2E-33E0-160.000000Y
SIT5002AI-2E-33E0-160.000000Y by Sitime is a TCXO Clock Oscillator with 5% Frequency Stability, 3.63V Max Supply Voltage, and 2.5 PPM/YEAR Aging. Ideal for applications requiring precise timing at 160MHz frequency, such as telecommunications equipment and networking devices due to its LVCMOS oscillator type and compact size of 3.2mm x 2.5mm x 0.75mm for surface mount installation.
ECS-TXO-2520MV-500-AN-TR
ECS-TXO-2520MV-500-AN-TR by Ecs International is a TCXO Clock Oscillator with 2.5% Frequency Stability, 1 PPM/YEAR Aging, and 50 MHz Nominal Operating Frequency. Ideal for applications requiring precise timing in a compact form factor, such as telecommunications equipment and industrial automation systems.
SIT5021AC-2BE-33N-171.000000X
SIT5021AC-2BE-33N-171.000000X by Sitime is a TCXO Clock Oscillator with 5% Frequency Stability, 3.63V Max Supply Voltage, and 2.5 PPM Aging. Ideal for applications requiring precise timing at 171MHz frequency, such as telecommunications equipment and networking devices due to its LVDS oscillator type and compact size of 3.2mm x 2.5mm x 0.75mm for surface mount installation.
SIT5356AI-FQ-33E0-25.000000F
SIT5356AI-FQ-33E0-25.000000F by Sitime is a TCXO Clock Oscillator with 25MHz frequency, 0.1% stability, and LVCMOS type. Ideal for applications requiring precise timing in temperature-sensitive environments due to its 1PPM aging rate and ceramic package material. Operates at temperatures from -40°C to 85°C with low power consumption at 3.3V supply voltage.
FOX924B-16.000-T1
Fox Electronics
TG5032CGN40.0000M-CAGHNA0
Seiko Epson
CMOS; Terminal Finish: GOLD; JESD-609 Code: e4;
DS4026S+RCN
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 16; Frequency Stability: 1 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
SIT5356AI-FQ-33E0-25.000000
AST3TQ-T-40.000MHZ-28
Abracon's AST3TQ-T-40.000MHZ-28 TCXO Clock Oscillator offers 0.28% frequency stability, 1 PPM aging, and LVCMOS oscillator type. Ideal for applications requiring precise timing at 40 MHz with a compact size of 7.0mm x 5.0mm x 1.9mm for surface mounting feature.
AST3TQ-T-40.000MHZ-28-T5
LVCMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: .28 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
AST3TQ53-T-20.000MHZ-5-C
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: .05 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
AST3TQ-T-40.000MHZ-28-T2
AST3TQ53-T-20.000MHZ-2-C
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: .28 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
AST3TQ-T-16.384MHZ-50-C
Abracon's AST3TQ-T-16.384MHZ-50-C TCXO Clock Oscillator offers 0.05% frequency stability, 1 PPM aging, and LVCMOS oscillator type. Ideal for applications requiring precise timing in a compact 7.0mm x 5.0mm x 1.9mm package.
AST3TQ-T-16.384MHZ-50-C-T5
LVCMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: .05 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
AST3TQ-20.000MHZ-1-
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: .1 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
AST3TQ-20.000MHZ-2-
AST3TQ-20.000MHZ-5-
CMOS; Mounting Feature: SURFACE MOUNT; No. of Terminals: 4; Frequency Stability: .5 %; Frequency Adjustment (Mechanical): NO; Aging: 1 PPM/FIRST YEAR;
AST3TQ53-T-20.000MHZ-1-C
AST3TQ53-T-16.384MHZ-5-C-T5
AST3TQ53-T-25.000MHZ-2-C
AST3TQ-20.000MHZ-1-T2
AST3TQ-T-30.720MHZ-28
AST3TQ-T-10.000MHZ-28
AST3TQ53-T-10.000MHZ-1-C
AST3TQ53-T-16.384MHZ-5-C
AST3TQ53-T-19.440MHZ-1-C
AST3TQ53-T-19.440MHZ-1-C by Abracon is a TCXO Clock Oscillator with a frequency stability of 0.1%, max supply voltage of 3.465V, and aging rate of 1PPM/yr. It is commonly used in applications requiring precise timing, such as telecommunications, industrial automation, and GPS systems.
AST3TQ53-T-19.440MHZ-2-C
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