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SI5345B-D-GM - 10-Output Jitter Attenuator | Skyworks
The Skyworks Solutions (formerly Silicon Labs) SI5345B-D-GM is a 10-channel, any-frequency, any-output jitter attenuator and clock multiplier housed in a 64-pin QFN exposed-pad package. It integrates fourth-generation DSPLL and MultiSynth technologies to synthesize up to ten independent output frequencies from a single reference, with output rates up to 350 MHz and 0.09 ps RMS phase jitter typical performance. The device operates from a 1.8 V / 3.3 V supply and is configurable via I2C/SPI with on-chip non-volatile memory. A jitter attenuator is a clock-tree building block that takes a potentially noisy reference signal and produces an ultra-clean clock that meets strict phase-noise and jitter budgets. Within the broader timing hierarchy it sits above simple crystal oscillators (XO) and below fully integrated timing cards; the SI5345B family specifically targets applications where any-frequency flexibility and sub-100-fs-class jitter are required simultaneously, such as 10G/25G/100G Ethernet PHYs, OTN framer/mapper ASICs, and synchronous-Ethernet line cards. Key features include any-output frequency from 0.001 MHz to 350 MHz, programmable output formats (LVCMOS, LVDS, LVPECL, HCSL, CML), digitally programmable jitter-attenuation bandwidth, and a fractional-feedback architecture that delivers true any-frequency synthesis without requiring external VCXO components. Each of the ten outputs can be set to different logic levels, divider ratios, and enable states through the serial interface, replacing multiple single-purpose oscillators and buffers on dense telecom boards. The architecture combines a fourth-generation DSPLL core with ten independent MultiSynth fractional dividers, allowing each output to be tuned to non-integer ratios from a common reference without compromising phase noise. Internal loop-filter components, EEPROM-backed default configuration, and per-output skew adjustment further simplify board design while keeping the BOM small. Typical applications include IEEE 1588 packet-clock synchronization, OTU2/OTU4 framer line cards, 100G optical module reference clocks, broadcast video reference generation, and FPGA transceiver reference clocking. The Skyworks ClockBuilder Pro software lets designers generate a register map for any combination of input/output frequencies and load it into the on-chip NVM so the device powers up configured. When laying out the Si5345B, treat the exposed pad as the primary thermal and grounds return path, place both 1.8 V and 3.3 V decoupling within 2 mm of their respective pins, and keep output traces at matched lengths (within 25 mil) for LVDS/LVPECL pairs to preserve jitter performance at high toggle rates. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
SI5351A-B-GTR - 200MHz I2C CMOS Clock Generator, 2-Output, MSOP-10 | Skyworks
The Skyworks (formerly Silicon Labs) SI5351A-B-GTR is an I2C-programmable any-frequency CMOS clock generator that synthesizes up to two independent non-integer-related frequencies from 8 kHz to 160 MHz, with a maximum output frequency of 200 MHz on each of its two LVCMOS outputs, housed in a 10-pin MSOP package. The device integrates two MultiSynth fractional dividers driven by a high-frequency PLL and accepts a standard 25 MHz or 27 MHz crystal reference, enabling flexible frequency planning without external VCXO components. A clock generator is a semiconductor IC that produces one or more precise timing signals used to synchronize logic in digital systems. The SI5351A-B-GTR belongs to the broader category of timing ICs, which sits between frequency synthesizers (PLL/VCO blocks) and standard fixed-frequency oscillators. Within the timing hierarchy, it is classified as a programmable CMOS clock generator, offering finer frequency resolution than a fixed-frequency XO and lower cost and complexity than a full VCXO/PLL solution. Engineers reach for the Si5351 family when fixed oscillators cannot deliver the exact multiple frequencies a system requires, especially in mixed-signal designs, SDR front-ends, and embedded video/multi-rate audio applications. Key features include independent per-output MultiSynth fractional-N dividers, user-configurable drive strength (2 mA, 4 mA, 6 mA, 8 mA), a spread-spectrum option for EMI reduction, and ultra-low jitter measured at 70 ps pk-pk typical. The two LVCMOS outputs support independently selectable output enable and phase-offset adjustment, allowing fine skew control between clock domains. The device operates from a single 2.5 V or 3.3 V supply with low quiescent current draw and integrates an I2C interface (up to 400 kHz) for in-system register configuration. The architecture is built around two PLLs and per-output MultiSynth fractional dividers that decouple output frequencies from integer-multiple relationships, enabling any-rate-any-output synthesis. The internal VCO is calibrated automatically, eliminating manual loop-filter components and supporting the wide 8 kHz to 200 MHz output range from a single silicon revision. Typical applications include amateur-radio SDR QRP transceivers, FPGA reference clocks, multi-rate audio interface clocks (e.g., 44.1/48/96 kHz families), microcontroller clock-tree generation, and HDMI/USB peripheral timing. When designing with this device, ensure the reference crystal load capacitance matches the onboard load capacitors, and follow the ClockBuilder Pro configuration utility to generate the I2C register map for non-standard frequency plans.
SI5391A-A-GM - 12-Output Ultra-Low-Jitter Clock Generator | Skyworks
The Skyworks Solutions SI5391A-A-GM is a 12-output, any-frequency, any-output ultra-low-jitter clock generator housed in a 64-pin VFQFN exposed-pad package. It supports a maximum output frequency of 1028 MHz, achieves phase jitter as low as 0.075 ps RMS, and operates from a single 1.8 V core supply with 3.3 V tolerant I/O. The device combines MultiSynth fractional and integer synthesis blocks to deliver four reference inputs, an on-chip VCO, and in-system programmable non-volatile memory for power-up deterministic configuration. A clock generator is a timing IC that derives one or more synchronized output frequencies from a single reference and distributes them as low-jitter CMOS, HCSL, LVDS, or LVPECL clocks to system sub-blocks. Clock generators sit in the broader timing hierarchy: oscillator -> PLL -> clock synthesizer -> clock generator -> clock buffer/jitter cleaner. The SI5391A-A-GM occupies the high-performance end of the clock-generator taxonomy, merging low-jitter PLL jitter-cleaning with MultiSynth fractional synthesis - it functions simultaneously as a synthesizer and a jitter-cleaner. Key specifications include 95 fs RMS typical phase jitter (12 kHz-20 MHz), 1.5 ps peak-to-peak period jitter, four differential reference inputs (XTAL, CMOS, LVDS, HCSL, LVPECL), twelve configurable output drivers, integrated LDO regulators, and I2C/SPI host control. Loss-of-lock and loss-of-reference detection support broadcast video, OTN, and SONET/SDH holdover transitions. The architecture pairs a high-Q analog MultiSynth VCO with four fractional-output MultiSynth blocks, allowing independent, non-coupled output frequencies up to 1028 MHz. Each output driver independently supports CMOS, HCSL, LVDS, and LVPECL standards through register configuration, eliminating external level-translation components. Typical applications include 100G/400G optical-module line-card clock trees, broadcast video reference clock fan-out, wireless baseband timing, OTN/SONET/SDH line cards, FPGA and ASIC reference-clock distribution in test & measurement ATE, and server/storage PCIe Gen 5 reference-clock generation. When designing with the SI5391A-A-GM, use Skyworks ClockBuilder Pro to generate the personalized configuration script because each shipping variant is factory pre-programmed with a unique NVM image. Plan PCB layout to keep the 64-VFQFN exposed pad soldered to a continuous low-thermal-resistance ground plane. This page synthesizes authoritative datasheet specs, current distributor pricing as of 2026-10-10, drop-in same-package alternatives, and AEO-oriented engineering content not found in the Si5391 datasheet alone.
SI5391P-A-GM - Ultra-Low Jitter 12-Output Clock Generator
The Skyworks Solutions (formerly Silicon Labs) SI5391P-A-GM is a precision-calibration ultra-low-jitter clock generator IC delivering 12 outputs from a single 64-pin VQFN exposed-pad package. According to the manufacturer's datasheet, it supports a maximum output frequency of 312.5 MHz and provides RMS phase jitter of 69 fs (typical) at 156.25 MHz and 312.5 MHz carrier frequencies, calibrated for data-converter, networking, and wireless infrastructure applications. A clock generator is a frequency-synthesis component that produces one or more precisely controlled timing references from a single input reference. Clock generators occupy the timing hierarchy above quartz crystals (which provide only a single fixed frequency) and below PLLs that lock to external references. The SI5391P belongs to the broader family of programmable clock generators that internalize MultiSynth fractional-divider technology to generate "any-frequency, any-output" combinations, eliminating discrete oscillator inventory in complex multi-rail designs. Key features of the SI5391P-A-GM include a 48 MHz crystal reference input, support for three independent clock domains, I2C/SPI serial configuration with non-volatile memory for default configuration restore, and precision calibration that linearizes the internal MultiSynth to achieve 95 fs maximum phase jitter across the supported frequency plan. Each output can be independently set to LVPECL, LVDS, HCSL, CMOS, or SSTL levels through software, allowing one part to replace multiple discrete XOs in PCB layout. Architecturally, the device combines a low-noise PLL, four MultiSynth fractional dividers, and per-output level translators. The MultiSynth architecture achieves 0 ppm frequency synthesis error while maintaining sub-100 fs RMS jitter, which directly translates to bit-error-rate improvements in 100G/400G optical transceivers and to ENOB headroom in high-speed ADCs. The 1 GHz internal VCO is divided down through MultiSynth blocks rather than traditional sigma-delta modulators, avoiding spurs in sensitive spectrum windows. Typical applications include 100G/400G Ethernet PHY line cards, OTU4 long-haul optical module reference clocks, FPGA and ASIC fabric clocks, JESD204B/C SerDes reference generation for high-speed data converters, wireless base-station timing distribution, and broadcast video reference generation. Its low intrinsic jitter makes it suitable as a master clock for RF DACs and ADCs where aperture jitter limits signal-to-noise ratio at IF frequencies above 1 GHz. When designing with the SI5391P, ensure the AC-coupling capacitor network on each differential output matches the 100-ohm termination scheme and that the PCB layout keeps the 48 MHz crystal traces short and symmetric. Decoupling the AVDD pins with both bulk and high-frequency ceramic capacitors within 2 mm of the exposed pad is critical to achieving datasheet jitter specifications.
SI5394A-A-GM - 4-Output Jitter Attenuator, 69fs | Skyworks
The Skyworks (formerly Silicon Labs) SI5394A-A-GM is a 4-output ultra-high-performance jitter attenuator that combines fourth-generation DSPLL and MultiSynth technologies to deliver 69 fs of phase jitter, supporting any-frequency clock generation and reference-clean clocking for next-generation serial-data systems. Housed in a 44-pin VFQFN Exposed Pad package, the device provides up to 12.8 GHz maximum output frequency per the DigiKey listing and includes 1 PLL with internal reference support. A jitter attenuator is a clock-tree building block placed between a noisy reference oscillator (or recovered clock) and a downstream high-speed transceiver, ADC, or serializer/deserializer (SerDes). The Si5394 integrates a digital PLL (DSPLL) with a MultiSynth fractional output divider tree, allowing it to generate non-integer-related output frequencies from almost any input reference while aggressively attenuating jitter across a wide loop bandwidth. As a member of the clock & timing hierarchy, it sits above simple crystal oscillators and below the system-level timebase, providing a programmable timing layer. The headline performance numbers are 69 fs RMS phase jitter (12 kHz-20 MHz integration band), 12.8 GHz maximum output frequency, and 12-channel/4-output flexibility. The device also supports free-run, synchronous, and holdover operating modes plus enhanced hitless switching between input references, minimizing phase transients during reference changes. Programming is done through a serial interface with in-circuit programmable non-volatile memory (NVM) so the device always powers up with a known frequency plan. The Si5394A-A-GM is targeted at 56G PAM4 SerDes, OTN/optical transport, high-speed data-conversion reference clocks, broadcast video, and military/aerospace timing systems. The combination of sub-100 fs jitter and high output frequency makes it one of the highest-performance integrated jitter cleaners on the market. When designing with this part, engineers should follow the ClockBuilder Pro configuration tool from Skyworks/Silicon Labs and respect the PCB layout note that all supply pins require local decoupling, while the exposed pad must be soldered to a continuous ground plane for thermal and electrical integrity. This page synthesizes distributor pricing, same-package cross-references, and practical design notes not found in the manufacturer datasheet.
SIT1602BC-22-33S-38.000000 - 38 MHz MEMS LVCMOS XO | SiTime
The SiTime SIT1602BC-22-33S-38.000000 is a 38.000 MHz fixed-frequency MEMS-based XO (crystal oscillator) with HCMOS/LVCMOS output, supplied in a 4-pin 3.2x2.5 mm SMD no-lead package. It operates from a continuous 1.8 V to 3.3 V supply (3.3 V nominal in this variant) and integrates Standby (Power Down) functionality for battery-powered applications. Per the SiTime SiT1602 datasheet, the device consumes 4.5 mA typical active current and supports frequencies from 3.57 MHz to 77.76 MHz, of which 38 MHz is one of 52 standard frequencies offered. An XO (crystal oscillator) is a self-contained timing device that delivers a stable square-wave reference clock to digital logic, MCUs, FPGAs, SoCs, and serializer/deserializer (SerDes) channels. In the broader taxonomy, an XO sits below the TCXO/VCTCXO/OCXO classes and above a bare quartz crystal: a quartz crystal alone cannot drive a load, whereas an XO combines the resonator with an amplifier and output buffer in one package. MEMS oscillators such as the SiT1602 family replace legacy quartz with silicon micro-electromechanical resonators, improving shock/vibration tolerance and shortening lead times. Key features of the SIT1602BC-22-33S-38.000000 include ±25 ppm frequency stability over -20 °C to +70 °C, total stability as low as ±20 ppm across the wider -40 °C to +85 °C operating range, 100% pin-to-pin compatibility with quartz-based XO footprints, and a standby current that preserves battery life. The 38 MHz output is a commonly required reference for Ethernet PHYs, USB 2.0 controllers, and mid-speed MCU peripherals. The SiT1602B architecture pairs a silicon MEMS resonator with a programmable analog ASIC and LVCMOS driver, achieving faster start-up than typical quartz oscillators while eliminating the quartz crystal's susceptibility to shock. Its 4.5 mA active supply current makes it suitable for always-on or battery-backed designs. Typical applications include Ethernet PHY reference clocks, USB 2.0 full-speed clocks, MCU/MPU clock trees, portable industrial handheld terminals, and consumer audio/video peripherals. The wide 1.8-3.3 V continuous supply range also allows a single BOM configuration across multiple rails, simplifying inventory. When designing in the SIT1602BC-22-33S-38.000000, place a 0.1 µF decoupling capacitor within 2 mm of the VDD pin and keep the output trace short to minimise reflections on this fast-edged LVCMOS signal. For standby control, drive the ST pin logic-low to enter power-down. This page synthesizes distributor stock, drop-in SiT1602 alternatives, and practical design notes beyond the manufacturer datasheet for engineers evaluating the 38 MHz fixed-frequency MEMS XO option.
SIT9002AI-432N33EQ200.00000Z - 200 MHz HCSL Spread-Spectrum XO | 6-SMD
The SiTime SIT9002AI-432N33EQ200.00000Z is a programmable spread-spectrum differential oscillator from the SIT9002 family, factory-configured at 200 MHz with HCSL output, 3.3 V supply, ±50 ppm frequency stability, and a 5.0 x 3.2 mm 6-SMD package. According to the SiTime datasheet, the SIT9002 platform is the industry's first programmable spread-spectrum differential oscillator and supports four programmable differential output signaling types: LVPECL, LVDS, CML, and HCSL across a 1 MHz to 220 MHz frequency range. This specific part-number suffix decodes as: AI = industrial grade, 43 = 5.0 x 3.2 mm 6-SMD, 2 = HCSL output, N33 = 3.3 V supply, E = Enable/Disable pin, Q = ±50 ppm stability, 200.00000 MHz center frequency, Z = factory-programmed customer configuration. Spread-spectrum clocking is a technique used to reduce peak electromagnetic interference (EMI) by modulating the output frequency over a wide band, lowering the fundamental tone-of-frequency amplitude measured in dBµV/m. The SIT9002 supports both center-spread and down-spread modes with programmable spread percentages, allowing system designers to meet stringent EMI compliance targets without adding shielding or filtering. As a programmable SiTime part, this device is built on a silicon MEMS resonator rather than a quartz crystal, providing superior shock and vibration resistance and eliminating the start-up reliability issues common to traditional crystal oscillators. Key electrical features of the SIT9002 family include: ±50 ppm total frequency stability across the full industrial temperature range (-40 °C to +85 °C), low jitter differential outputs suitable for PCI Express Gen-1 reference applications, and integrated Enable/Disable pin (pin 1) for power management. The HCSL output format is reference-terminated at the receiver and is commonly used for chip-to-chip clocking on PCI Express, Serial ATA, and RapidIO interfaces. Unlike LVPECL which requires external biasing, HCSL simplifies board design by allowing a source-terminated series resistor at the driver output. Typical applications include PCI Express expansion cards and chipsets, server and storage area networking clock distribution, industrial controllers with EMI-sensitive enclosures, and SATA/SAS storage interfaces. The wide programmable frequency range (1 to 220 MHz) and four programmable pin shapes (LVPECL/LVDS/CML/HCSL) make the SIT9002 family a flexible platform for designers who want a single BOM line that covers multiple frequency plans and output standards. When designing with this part, ensure the load capacitors specified in the datasheet are placed close to the receiver, and that the HCSL source-termination resistor (typically 33 Ω) is selected per the SiTime reference schematic. For best EMI performance, use the down-spread mode with at least ±0.25 % spread percentage, which typically reduces measured EMI by 7-10 dB on the fundamental. This page synthesizes distributor pricing, drop-in alternative MPNs, and application-specific design notes not found in the manufacturer datasheet itself.
SKY72300-362 - 2.1 GHz Dual Fractional-N Synthesizer | Skyworks
The Skyworks SKY72300-362 is a direct digital modulation fractional-N frequency synthesizer that provides ultra-fine frequency resolution, fast switching speed, and low phase-noise performance. It supports an RF output range from 100 MHz to 2.1 GHz with a 100 Hz step size in a 24-pin VFQFN exposed-pad package. The part operates from a single 2.7 V to 3.3 V supply while drawing only 200 µA typical current, suiting it to portable and battery-powered radio platforms. A fractional-N synthesizer is a phase-locked loop (PLL) frequency synthesizer that allows the feedback divider to take non-integer values, achieving a reference-frequency resolution smaller than the comparison frequency itself. The SKY72300-362 belongs to the broader category of clock & timing ICs and sits within the hierarchy: PLL -> frequency synthesizer -> clock generator -> timing IC -> mixed-signal semiconductor. This taxonomy matters because fractional-N synthesizers are preferred over integer-N designs whenever fine channel spacing is required without sacrificing loop bandwidth or switching speed. Key differentiating specifications include programmable divide ratios from 38 to 537 in fractional-N mode and from 32 to 543 in integer-N mode, dual CML prescaler outputs for flexible system architecture, and integrated charge-pump phase detectors that remove the need for an external loop-filter op-amp. The device also features a low phase-noise floor of -91 dBc/Hz, which is essential for high-performance radio designs requiring clean local-oscillator signals. Architecture-wise the SKY72300-362 combines a digital Σ-Δ modulator with a high-speed prescaler and dual charge pumps. Direct digital modulation enables data to be injected into the loop without an external DAC, which simplifies the radio baseband interface and minimizes bill-of-material cost. The spur-free architecture specifically targets spurious emissions that commonly degrade adjacent-channel performance in fractional-N synthesizers. Typical applications include cellular base-station transceivers, wireless local-loop equipment, ISM-band radios operating between 750 MHz and 850 MHz, and Software Defined Radio (SDR) platforms. The 750-850 MHz VCO/synthesizer combination is well-suited to industrial-scientific-medical bands, private mobile radio, and short-range data links. The part's small 4x4 mm QFN footprint also enables compact PCB layouts for portable test equipment. When designing with this part, place the loop filter components as close to the charge-pump pins as possible, use a stable low-noise reference oscillator, and ensure the exposed pad receives sufficient ground copper for thermal dissipation. Bypass capacitors of 100 nF and 10 µF in parallel should be placed within 2 mm of the supply pin. This page synthesizes distributor pricing, drop-in alternative candidates, and practical RF design notes not collated in the manufacturer datasheet alone.
SN65LVDS105PWR - 1:4 LVDS Clock Fanout Buffer 400Mbps | TI
The Texas Instruments SN65LVDS105PWR is a 1 LVTTL-to-4 LVDS clock fanout buffer and repeater that accepts a single low-voltage TTL input and drives four differential LVDS output pairs at data signaling rates up to 400 Mbps (clock frequencies to 400 MHz), operating from a single 3.3-V supply (3 V to 3.6 V) in a 16-pin TSSOP (PW) package. A clock fanout buffer is a timing distribution device that takes one reference clock or data stream and replicates it across multiple identical outputs, maintaining signal integrity over transmission lines. Within the system hierarchy, it belongs to the clock buffer and signal repeater family of interface ICs, sitting between the clock source and the differential receivers distributed across a backplane or board. LVDS, as specified in ANSI EIA/TIA-644, is a low-voltage differential signaling technique offering low power, low noise coupling, and high switching speeds over relatively long distances. Key features include four differential LVDS line drivers meeting or exceeding the ANSI EIA/TIA-644 LVDS standard, a typical output voltage swing of 350 mV into a 100-ohm load, operation from a single 3.3-V rail, and support for signaling rates to 400 Mbps. The LVTTL-compatible input allows direct connection to standard CMOS or TTL clock sources without external level translation. Technically, the SN65LVDS105 integrates one LVTTL receiver stage followed by four parallel LVDS drivers implemented with current-mode outputs, which limit the slew-related EMI and crosstalk compared with single-ended signaling. The small 350-mV differential swing over a 100-ohm terminated line reduces power consumption relative to PECL while sustaining high data rates, making the part well suited to dense timing trees. Typical applications include clock distribution to backplane line cards, LVDS signal retiming and repeat in telecom and networking equipment, and fanout of a processor or FPGA reference clock to multiple serializer or ADC loads. Design consideration: route each LVDS output pair as a controlled-impedance 100-ohm differential pair, and keep the LVTTL input trace away from the LVDS pairs; on multilayer boards TI recommends at least two separate signal planes to reduce TTL/CMOS-to-LVDS crosstalk. This page synthesizes distributor pricing, verified drop-in alternatives, application guidance, and design notes not found in the manufacturer datasheet alone.
SN65LVDS105PWRG4 - 1:4 LVDS Clock Fanout Buffer 400Mbps | TI
The Texas Instruments SN65LVDS105PWRG4 is a 1 LVTTL-to-4 LVDS clock fanout buffer and repeater that supports data signaling rates up to 400 Mbps, operates from a single 3 V to 3.6 V supply, and is housed in a 16-pin TSSOP (PW) package. It accepts one low-voltage TTL (LVTTL) input and drives four differential LVDS output pairs that meet or exceed the ANSI EIA/TIA-644 LVDS standard. A clock fanout buffer is a timing-distribution component in the clock and timing hierarchy of a digital system. It takes a single reference clock (or data stream) and replicates it to multiple loads while preserving signal integrity, edge rate, and jitter performance. In LVDS-based systems, the fanout buffer also converts single-ended LVTTL levels to low-voltage differential signaling, which offers common-mode noise immunity and lower electromagnetic emissions than single-ended CMOS or TTL clock distribution. Key features of the SN65LVDS105 include compliance with the ANSI EIA/TIA-644 LVDS electrical standard, typical LVDS output swing of approximately 285 mV into a 100-ohm load, and bus-terminal ESD tolerance that exceeds 12 kV (per TI family datasheet information for this device class). The four LVDS drivers provide deterministic propagation delay with a typical buffer delay of 2.2 ns, enabling predictable multi-load clock skew planning. The device operates from a 3.3 V nominal supply (3 V to 3.6 V range), making it compatible with standard logic rails. The LVTTL receiver input accepts standard 3.3 V logic levels, so the part can sit directly between an FPGA, MCU, or clock generator output and four separate LVDS destinations such as displays, serializers, or data converters. The SN65LVDS104 companion variant accepts differential input levels (+/-100 mV typical) instead of LVTTL, allowing true LVDS repeater designs. Typical applications include backplane clock distribution, point-to-point LVDS data links, LCD panel timing distribution, telecom and networking line cards, and industrial control systems requiring 400 Mbps-class differential signaling over controlled-impedance traces. Design consideration: use 100-ohm differential termination at each LVDS receiver, keep the four output pairs tightly length-matched, and verify supply decoupling with 0.1 uF ceramic capacitors at each VCC pin to minimize jitter contribution. This page synthesizes distributor listings, cross-reference data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
STW81100AT-1 - 4.4GHz RF Synthesizer | STMicroelectronics
STMicroelectronics STW81100AT-1 is an integer-N, multi-band RF frequency synthesizer with two integrated differential VCOs, a maximum indicated frequency of 4.4 GHz, and one channel in a 28-pin VFQFN exposed-pad package. The device is intended for RF clock generation and frequency synthesis where multiple internal oscillator ranges improve coverage of wireless communication bands. According to the manufacturer datasheet, direct output includes a 3900 MHz to 4400 MHz range and an internal divider extends coverage to 2200 MHz. A frequency synthesizer is a clock-and-timing IC that uses a phase-locked loop to generate a stable output frequency from a reference source. A PLL compares a divided feedback signal with the reference, while an integrated voltage-controlled oscillator supplies the output. This STW81100AT-1 device combines an integer-N PLL architecture, dual differential integrated VCOs, and automatic center-frequency calibration in one RF-oriented package. The principal feature is multi-band operation from integrated VCO cores. The manufacturer datasheet identifies direct output at 3900 MHz to 4400 MHz and an internal divider by two with output at 2200 MHz. Automatic center-frequency calibration supports startup across different operating states, while the integer-N architecture simplifies frequency planning. A maximum frequency of 4.4 GHz makes the part applicable to microwave and wireless RF signal chains operating below that limit. The 28-VFQFN exposed-pad package is designed for compact RF layouts and provides a central thermal and ground connection. Its RF performance depends on clean supplies, controlled reference routing, short interconnects, and appropriate impedance-controlled layouts. The datasheet indicates that the exposed pad must be connected to ground, while the remaining manufacturing, loop-filter, and RF-layout details should follow the exact pin arrangement and reference circuit in the manufacturer documentation. Typical uses include RF transceiver clock generation, wireless base-station and infrastructure equipment, microwave communication links, test-and-measurement instruments, and frequency-generation modules. It is most appropriate when an integrated synthesizer reduces board area compared with a discrete oscillator and divider arrangement. It should not be selected solely by its 4.4 GHz headline value; reference frequency, tuning range, channel spacing, output power, phase noise, temperature range, and system loop-filter requirements must also be checked. Designers should verify every pin against the 28-pin VFQFN layout before layout release and use the manufacturer's reference circuit as the starting point. RF and supply connections need short return paths, carefully controlled impedance, and isolation from noisy switching stages. Loop-filter component values determine lock behavior and phase noise, so they should not be copied between different reference or output-frequency plans without recalculation. This page consolidates distributor availability, package information, verified frequency and architecture details, engineering application guidance, and procurement-oriented comparisons. It distinguishes documented facts from unavailable information rather than estimating supply voltage, output power, phase noise, temperature limits, pricing, or a complete pin assignment that was not present in the supplied web results.
STW81100ATR-1 4.4 GHz Multi-Band RF Synthesizer | STMicroelectronics
STMicroelectronics STW81100ATR-1 is a multi-band RF frequency synthesizer with integrated voltage-controlled oscillators, a maximum listed frequency of 4.4 GHz, one RF output, and a 28-pin VFQFN exposed-pad package. It uses an integer-N architecture and incorporates two differential integrated VCOs with automatic center-frequency calibration. The documented direct-output ranges include 3.9 GHz and 4.4 GHz, while the available source material also identifies internal-divider operation around 2.2 GHz. A frequency synthesizer is a clock-and-timing integrated circuit that generates a stable output frequency from a reference source. In the hierarchy, the STW81100ATR-1 is an RF frequency synthesizer, a phase-locked-loop device, and a multi-band clock generator. Its integrated VCOs place the oscillator core inside the package, reducing the number of external microwave oscillator components required in an RF signal chain while supporting closed-loop frequency regulation. The primary feature set includes an integer-N frequency-synthesizer architecture, dual differential integrated VCOs, automatic center-frequency calibration, direct RF output, and internal division. Direct outputs are explicitly listed at 3900 MHz and 4400 MHz. The device is identified as a one-output RF frequency synthesizer in a 28-terminal QCCN surface-mount package and is intended for industrial-grade RF equipment. Automatic center-frequency calibration is particularly important for an integrated VCO because it helps the synthesizer establish an operating condition suitable for stable closed-loop operation. The integer-N architecture determines frequency through integer division and phase comparison, while the integrated VCO supplies the high-frequency output. Detailed phase-noise, reference-input, tuning-voltage, lock-time, temperature-range, and power-supply values are not included in the supplied source snippets and therefore require confirmation from the manufacturer datasheet. Typical uses include multi-band RF transceiver modules, microwave communication equipment, test and measurement instruments, and RF subsystems requiring synthesized local-oscillator signals in the 3.9 GHz or 4.4 GHz bands. The industrial temperature grade can suit equipment operating outside consumer-only environments, although the precise rated temperature interval must be obtained from the datasheet. When designing around this IC, verify the complete reference, charge-pump, loop-filter, supply, and RF output network against the manufacturer application guidance. Preserve the exposed-pad thermal and grounding requirements of the 28-pin VFQFN package, and validate lock behavior, spur performance, and phase noise in the intended channel plan rather than relying only on the maximum listed output frequency. This page consolidates distributor availability, verified catalog attributes, related family information, and practical RF design considerations. It also distinguishes documented facts from parameters not present in the supplied data, providing a transparent basis for footprint review and manufacturer-datasheet confirmation before a drop-in design decision.
STW81101ATR - Multi-Band RF Frequency Synthesizer | STMicroelectronics
The STMicroelectronics STW81101ATR is a multi-band RF frequency synthesizer with integrated VCOs, integer-N frequency synthesis, and dual differential VCO outputs in a 28-pin VFQFPN package. The device accepts a 10 MHz to 200 MHz input reference and operates from a 3 V to 3.6 V supply. Its 0.5 mm terminal pitch and approximately 1 mm package height support compact RF and wireless-infrastructure equipment. A frequency synthesizer is a clock-and-timing IC that generates a stable, programmable output frequency by locking a voltage-controlled oscillator to a reference signal. The STW81101ATR belongs to the PLL, clock-generator, and RF-synthesizer hierarchy. Integrating the VCOs with the synthesizer reduces board area compared with a discrete oscillator and separate phase-locked-loop arrangement while retaining programmable RF output generation. The verified product information identifies integer-N operation and two differential integrated VCOs with automatic center-frequency calibration. Direct and internally divided output arrangements are indicated in the available documentation, although the complete frequency ranges are not exposed in the supplied excerpts. The 10 MHz to 200 MHz input range provides a reference interface suitable for RF systems that derive a stable carrier from an external reference or frequency multiplier. The STW81101ATR is specified for a 3 V to 3.6 V supply and an operating temperature range of -40°C to +85°C. These values make it appropriate for compact industrial and commercial RF equipment where a low-voltage control domain, moderate temperature range, and surface-mount construction are required. Its integrated synthesizer architecture is intended to simplify RF signal generation compared with a discrete VCO, divider, charge-pump, and loop-filter implementation. Typical uses include wireless infrastructure, RF test equipment, frequency-generation modules, and communication receivers that require a phase-locked RF carrier. In these systems, the device can generate a calibrated carrier that is subsequently mixed, modulated, or divided. Integration is especially useful where PCB area is constrained and repeatable center-frequency calibration is more valuable than the flexibility of a fully discrete oscillator network. Designers should provide a clean reference signal and follow the manufacturer layout guidance for the differential VCO and synthesizer interfaces. Decoupling and high-frequency routing are critical because supply noise or trace coupling can degrade phase-noise and spur performance. The exact recommended capacitor values, loop-filter constants, output-frequency ranges, and RF output power must be taken from the complete manufacturer datasheet. This page consolidates the verified package, interface, supply, temperature, sourcing, and cross-reference information into an engineering-focused selection guide. It also distinguishes a documented same-package option from unsupported cross-package suggestions, helping designers avoid treating functionally related RF ICs as true drop-in replacements.
STW81102ATR - 4.65 GHz Multi-Band RF Synthesizer | STMicroelectronics
STMicroelectronics STW81102ATR is an integer-N multi-band RF frequency synthesizer with dual differential integrated voltage-controlled oscillators, a maximum listed frequency of 4.65 GHz, and a 28-pin VFQFPN package. The R suffix identifies the tape-and-reel ordering option, while the device belongs to STMicroelectronics' Clock & Timing family of clock generators, phase-locked loops, and frequency synthesizers. An RF frequency synthesizer is a clock-and-timing semiconductor that locks a voltage-controlled oscillator to a stable reference frequency. Its phase-locked loop compares the divided output with the reference signal, then adjusts the oscillator control voltage until phase and frequency align. This architecture allows an RF system to generate a stable programmable output from a shared reference instead of relying on multiple independent oscillators. The STW81102ATR uses an integer-N frequency-synthesis architecture and incorporates two differential VCOs with automatic center-frequency calibration. According to the supplied STMicroelectronics datasheet indexing, each VCO provides a direct RF output path, while an internal divider supports an additional lower-frequency division function. Automatic center-frequency calibration helps compensate for process, supply, and temperature variation that would otherwise move the oscillator operating point. The verified distributor and datasheet listings identify the device as operating up to 4.65 GHz with one listed output and approximately 12 mA device current. These figures make it relevant to RF and wireless-infrastructure designs, although the supplied sources do not provide the complete input-frequency ranges, output-power levels, phase-noise curves, reference sensitivity, lock-time limits, supply-voltage range, temperature range, or recommended decoupling network. Typical use cases include multi-band wireless infrastructure, local-oscillator generation, RF transceiver frequency planning, and other systems requiring programmable RF output with integrated VCOs. The two calibrated differential VCOs are especially useful when a design requires more than one related RF frequency source or a direct output combined with a divided output. Engineers should still verify phase-noise and spur performance against the exact channel and band requirements. The main design consideration is that this is a high-frequency analog/RF subsystem rather than a general-purpose digital clock generator. PCB traces, supply filtering, reference routing, ground-plane continuity, and exposed-pad thermal management can affect VCO behavior. Decoupling and loop-filter values must be selected from the complete manufacturer datasheet and reference schematic rather than inferred from the distributor summary. This page consolidates the verified catalog data for the STW81102ATR and adds application context, engineering caveats, and a drop-in comparison with the identified STW81102AT ordering variant. The comparison distinguishes verified facts from parameters that require confirmation from the full manufacturer datasheet before layout or qualification.
STW81200T - 6 GHz Fractional-N RF Synthesizer | STMicroelectronics
The STMicroelectronics STW81200T is a wideband RF PLL frequency synthesizer covering 46.875 MHz to 6 GHz, with one output, in a 36-VFQFN exposed-pad package. It combines dual Fractional-N and Integer-N architectures with three low-phase-noise VCOs and integrated LDOs for RF signal-generation systems. A frequency synthesizer generates or converts an output frequency from a reference source while controlling phase and frequency. A PLL-based synthesizer belongs to the clock and timing IC hierarchy, where it extends beyond ordinary clock distribution into phase-locked-loop frequency generation, RF signal conditioning, modulation, and waveform conversion. The device's headline capabilities are its 46.875 MHz-to-6 GHz tuning range, fractional-N or integer-N operation, and three integrated low-phase-noise VCOs. Integrated LDOs include over-current protection, internal power ramping, and an external 100 nF feed-forward bypass requirement described in the manufacturer datasheet. This integration supports compact RF designs while reducing the number of separate frequency-generation blocks. Architecturally, STW81200T supports both fractional-N synthesis for programmable frequency relationships and integer-N synthesis for channels that do not require fractional division. The three VCO choices allow the system designer to optimize frequency coverage and phase-noise behavior across the operating band. The wide range makes the synthesizer relevant to RF communications, test equipment, and frequency-conversion stages. Typical applications include wideband RF transceivers, local oscillators, laboratory synthesizers, communication infrastructure, and instrumentation requiring programmable output above 500 MHz. Its principal trade-off is integration: fewer external frequency-generation blocks are required, but the design must follow the datasheet's reference, bypass-capacitor, grounding, and exposed-pad requirements. Place the 100 nF feed-forward capacitor exactly as specified in the manufacturer datasheet and provide the required supply decoupling at every LDO. Keep the reference path short and controlled, connect the exposed pad to the recommended thermal and ground plane, and validate phase-noise, spur, and settling performance across the intended frequency plan. This page combines verified distributor data, official STMicroelectronics documentation, application guidance, and procurement information.
STW81200TR - 6 GHz Fractional-N RF Synthesizer | STMicroelectronics (Tape & Reel)
The STMicroelectronics STW81200TR is a wideband RF PLL frequency synthesizer covering 46.875 MHz to 6 GHz, with one output, in a 36-VFQFN exposed-pad package. It combines dual Fractional-N and Integer-N architectures with three low-phase-noise VCOs and integrated LDOs for RF signal-generation systems. A frequency synthesizer generates or converts an output frequency from a reference source while controlling phase and frequency. A PLL-based synthesizer belongs to the clock and timing IC hierarchy, where it extends beyond ordinary clock distribution into phase-locked-loop frequency generation, RF signal conditioning, modulation, and waveform conversion. The device's headline capabilities are its 46.875 MHz-to-6 GHz tuning range, fractional-N or integer-N operation, and three integrated low-phase-noise VCOs. Integrated LDOs include over-current protection, internal power ramping, and an external 100 nF feed-forward bypass requirement described in the manufacturer datasheet. This integration supports compact RF designs while reducing the number of separate frequency-generation blocks. Architecturally, STW81200TR supports both fractional-N synthesis for programmable frequency relationships and integer-N synthesis for channels that do not require fractional division. The three VCO choices allow the system designer to optimize frequency coverage and phase-noise behavior across the operating band. The wide range makes the synthesizer relevant to RF communications, test equipment, and frequency-conversion stages. Typical applications include wideband RF transceivers, local oscillators, laboratory synthesizers, communication infrastructure, and instrumentation requiring programmable output above 500 MHz. Its principal trade-off is integration: fewer external frequency-generation blocks are required, but the design must follow the datasheet's reference, bypass-capacitor, grounding, and exposed-pad requirements. Place the 100 nF feed-forward capacitor exactly as specified in the manufacturer datasheet and provide the required supply decoupling at every LDO. Keep the reference path short and controlled, connect the exposed pad to the recommended thermal and ground plane, and validate phase-noise, spur, and settling performance across the intended frequency plan. This page combines verified distributor data, official STMicroelectronics documentation, application guidance, and procurement information.
SY604JC - 255-Tap 4-40ns Programmable Delay | Microchip
The Microchip Technology SY604JC is an ECL-compatible trigger-programmable timing-edge vernier and delay-line IC with 255 taps, a 4ns first-tap delay, and a 4ns to 40ns programmable delay range in a 28-LCC J-lead package. According to the provided manufacturer-related data, the device supports a true 125 MHz retrigger rate, 15ps delay resolution, differential TRIGGER inputs, and lower-power dissipation of 350mW typical. A programmable delay line, delay generator, or timing vernier is a timing IC that inserts a digitally selected interval into a signal path. Its hierarchy is timing IC to delay-line IC to programmable timing component. SY604JC uses an 8-bit code loaded concurrently with the circuit trigger to select among 255 delay taps, making it useful where calibrated timing, pulse positioning, clock alignment, or retriggerable edge delays are required. The verified feature set emphasizes fine delay granularity. The provided Microchip product-page information specifies a 15.7ps tap increment, while another verified source states 15ps delay resolution. Differential trigger inputs support timing-control arrangements that can reduce common-mode sensitivity. The ECL-compatible interface places the part in high-speed logic systems where short, programmable delays are more useful than a general-purpose fixed-delay element. Technically, SY604JC is fabricated in Micrel-Synergys proprietary ASSET bipolar process, as stated in the verified datasheet search data. The 28-LCC J-lead package provides a defined leaded footprint for board-level assembly and rework. The available evidence describes one independent delay, 255 taps or steps, and timing accuracy of less than ±1 LSB; exact rise and fall times, supply-voltage range, and temperature limits were not supplied and therefore remain data-needed rather than inferred. Typical uses include digital trigger conditioning, high-speed test systems, pulse-generation circuits, clock-phase adjustment, and ECL-compatible timing modules. The 4ns to 40ns span is particularly appropriate for short timing offsets that must be digitally selected rather than approximated with analog trimmer networks. The 125MHz retrigger capability can suit repetitive high-rate timing systems when system timing budgets meet the device requirements. A key design consideration is that the control code must be coordinated with the trigger event because the verified description says the 8-bit code is loaded concurrently with the trigger. Preserve adequate routing margin for the differential trigger and delay outputs, and verify the exact logic levels and timing specifications against the manufacturer datasheet before layout signoff. The 350mW typical dissipation also calls for normal package thermal review. This page combines verified distributor, manufacturer-related, and datasheet-search information with application guidance and explicitly identifies missing electrical details. It does not invent substitute parts where the supplied cross-reference results contain no confirmed pin-compatible equivalent.
SY604JC-TR - 255-Tap 4ns-40ns Delay Line | Microchip
The Microchip Technology SY604JC-TR is a programmable trigger delay line IC with 255 taps, a 4ns minimum total delay, and a 40ns maximum total delay. It is packaged in a 28-LCC J-lead surface-mount package and is supplied in tape-and-reel packaging. The device also provides a 15.7ps tap increment and a true 125MHz retrigger rate. A delay line is a timing IC that creates a controlled propagation delay between an input edge and an available output tap. It belongs to the broader integrated-circuit hierarchy as a clock-and-timing IC, a timing-control IC, and ultimately a semiconductor. Programmable delay lines are useful when a system requires calibration, edge-position adjustment, phase alignment, or a selectable delay without redesigning the physical layout. The SY604JC-TR offers 255 selectable taps, differential TRIGGER inputs, and timing accuracy described as less than ±1 LSB. Its total programmable span is 4ns to 40ns, while the 15.7ps increment permits fine delay resolution. Compatibility with 10KH ECL logic supports use in high-speed timing environments, and typical power dissipation is listed as 350mW. Technically, the device combines a retriggerable delay path with a tap-selection mechanism so a system can choose among 255 delay positions. The 125MHz retrigger rate means the delay element can be triggered again at high repetition rates, which is relevant in pulse-generation, synchronization, and instrumentation systems. The trigger arrangement provides two inputs for differential triggering, helping reduce sensitivity to common-mode input effects when the circuit requires repeatable edge detection. Typical applications include pulse-width calibration, digital timing alignment, phase-shift generation, clock distribution and synchronization, automated test equipment, and laboratory instrumentation. The 4ns-to-40ns span is especially useful for fine timing adjustment in systems operating at sub-nanosecond resolution. The principal design consideration is that a delay-line IC is not interchangeable with a fixed-delay trace or passive delay network. The PCB must route the differential trigger signals and output taps with controlled impedance, and the power supply must meet the documented 4.2V-to-5.7V range. Designers should also account for 350mW typical power dissipation when placing the 28-LCC package near thermally sensitive circuitry. This product page combines verified distributor specifications, practical timing-engineering guidance, and a structured comparison framework. It separates documented performance from unavailable information and helps engineers evaluate the SY604JC-TR for precision delay, calibration, and synchronization designs.
SY604JZ - 255-Tap 4-40ns Delay Line IC | Microchip
The Microchip Technology SY604JZ is a programmable delay-line integrated circuit with 255 taps, a 4 ns to 40 ns total-delay range, and a 28-LCC J-lead package. It supports 125 MHz retrigger operation, differential trigger inputs, and 15 ps delay resolution according to the verified distributor data. A programmable delay line is a timing integrated circuit that accepts a trigger edge and produces one or more delayed versions of that edge. It belongs to the delay-line and timing-element hierarchy, alongside clock and timer integrated circuits. The SY604JZ is useful where deterministic edge alignment, calibration, pulse-position adjustment, or synchronous timing compensation is required rather than ordinary frequency generation. The device provides one independent delay path with 255 selectable taps. Verified listings identify a 4 ns delay to the first tap, an available total-delay range of 4 ns to 40 ns, and a tap increment of approximately 15.7 ps. Its differential trigger arrangement can support systems that need controlled edge-to-edge timing, while the 125 MHz retrigger capability addresses high-rate repeated triggering. The SY604JZ is identified in the verified data as a lead-free surface-mount component supplied in a 28-pin PLCC/J-lead package. The operating voltage is listed as 4.2 V to 5.7 V. These details make the device most suitable for 5 V-class digital timing systems, provided the host circuit observes the supply limits and uses the correct package footprint. Typical timing applications include digital test equipment, pulse-position calibration, clock-skew compensation, phase alignment, synchronization networks, and embedded timing-generation circuits. The 15 ps resolution can be valuable when fine edge placement is more important than simple propagation delay. Engineers should verify output timing over the complete temperature and supply range using the manufacturer datasheet before treating nominal resolution as a guaranteed system accuracy. For PCB implementation, preserve the J-lead land pattern, route the differential trigger pair as a matched pair, and keep the delay-line supply and return planes low-impedance. Treat the delay path as a timing-sensitive structure: uncontrolled loading, long stubs, or mismatched routing can disturb intended edge timing. The available distributor records are the basis for the commercial and source links listed here; detailed application guidance should be checked against the official Microchip datasheet.
SY604JZ-TR - 255-Tap 4-40ns Delay Line IC | Microchip (Tape & Reel)
The Microchip Technology SY604JZ-TR is a programmable delay-line integrated circuit with 255 taps, a 4 ns to 40 ns total-delay range, and a 28-LCC J-lead package. It supports 125 MHz retrigger operation, differential trigger inputs, and 15 ps delay resolution according to the verified distributor data. A programmable delay line is a timing integrated circuit that accepts a trigger edge and produces one or more delayed versions of that edge. It belongs to the delay-line and timing-element hierarchy, alongside clock and timer integrated circuits. The SY604JZ-TR is useful where deterministic edge alignment, calibration, pulse-position adjustment, or synchronous timing compensation is required rather than ordinary frequency generation. The device provides one independent delay path with 255 selectable taps. Verified listings identify a 4 ns delay to the first tap, an available total-delay range of 4 ns to 40 ns, and a tap increment of approximately 15.7 ps. Its differential trigger arrangement can support systems that need controlled edge-to-edge timing, while the 125 MHz retrigger capability addresses high-rate repeated triggering. The SY604JZ-TR is identified in the verified data as a lead-free surface-mount component supplied in a 28-pin PLCC/J-lead package. The operating voltage is listed as 4.2 V to 5.7 V. These details make the device most suitable for 5 V-class digital timing systems, provided the host circuit observes the supply limits and uses the correct package footprint. Typical timing applications include digital test equipment, pulse-position calibration, clock-skew compensation, phase alignment, synchronization networks, and embedded timing-generation circuits. The 15 ps resolution can be valuable when fine edge placement is more important than simple propagation delay. Engineers should verify output timing over the complete temperature and supply range using the manufacturer datasheet before treating nominal resolution as a guaranteed system accuracy. For PCB implementation, preserve the J-lead land pattern, route the differential trigger pair as a matched pair, and keep the delay-line supply and return planes low-impedance. Treat the delay path as a timing-sensitive structure: uncontrolled loading, long stubs, or mismatched routing can disturb intended edge timing. The available distributor records are the basis for the commercial and source links listed here; detailed application guidance should be checked against the official Microchip datasheet.
SY605JC - 125MHz 255-Tap Programmable Delay | Microchip
The Microchip Technology SY605JC is a 125 MHz write-programmable timing edge vernier with 255 taps, 15 ps delay resolution, and a selectable 4 ns to 40 ns delay range. The device is supplied in a 28-LCC J-lead package and provides one independent programmable delay channel for precision edge-positioning and phase-control applications. A programmable delay line is a clock-and-timing semiconductor that digitally selects an adjustable propagation delay between a trigger edge and an output edge. It belongs to the timing IC hierarchy: delay line IC → programmable timing IC → clock and timing IC → semiconductor. This makes the SY605JC useful where a circuit requires calibrated nanosecond offsets, retriggerable timing, or deterministic edge placement without redesigning the surrounding board. Key features include a true 125 MHz retrigger rate, 255 programmable taps, 15 ps delay resolution, and timing accuracy of less than ±1 LSB. Differential TRIGGER and delay WRITE inputs support interface compatibility, while 10K H ECL compatibility supports high-speed digital timing environments. The reported typical power dissipation is 350 mW, making thermal design and power-plane return paths important in dense systems. The SY605 architecture uses the Micrel-Synergys proprietary ASSET bipolar process, according to the manufacturer datasheet information supplied in the verified results. Its differential control inputs and fine delay granularity make it more appropriate than a general-purpose fixed delay line when the delay must be changed by a digital control word. The 28-LCC package preserves a conventional leaded footprint for through-hole or mixed-technology assemblies, but the exact pin names and electrical limits must be confirmed against the official datasheet before layout release. Typical applications include high-speed clock calibration, digital timing alignment, pulse-position control, phase-shift generation, instrumentation, and ECL-compatible timing modules. The device is particularly relevant where a retriggerable event and programmable 15 ps increments simplify calibration or phase alignment. When designing around the SY605JC, preserve the differential input topology and provide adequate decoupling and controlled return paths. Treat the 350 mW typical dissipation as a design input, then verify package thermal performance against the actual board copper and ambient temperature. Avoid assuming the 28-LCC package is interchangeable with a surface-mount package without a footprint and pinout review. This page consolidates the verified distributor descriptions, timing specifications, package information, and replacement-search status for SY605JC. It separates confirmed values from unavailable details rather than estimating pin assignments, pricing, lifecycle, or electrical limits.
SY605JC-TR - 125MHz 255-Tap Programmable Delay | Microchip (Tape & Reel)
The Microchip Technology SY605JC-TR is a 125 MHz write-programmable timing edge vernier with 255 taps, 15 ps delay resolution, and a selectable 4 ns to 40 ns delay range. The device is supplied in a 28-LCC J-lead package and provides one independent programmable delay channel for precision edge-positioning and phase-control applications. A programmable delay line is a clock-and-timing semiconductor that digitally selects an adjustable propagation delay between a trigger edge and an output edge. It belongs to the timing IC hierarchy: delay line IC → programmable timing IC → clock and timing IC → semiconductor. This makes the SY605JC-TR useful where a circuit requires calibrated nanosecond offsets, retriggerable timing, or deterministic edge placement without redesigning the surrounding board. Key features include a true 125 MHz retrigger rate, 255 programmable taps, 15 ps delay resolution, and timing accuracy of less than ±1 LSB. Differential TRIGGER and delay WRITE inputs support interface compatibility, while 10K H ECL compatibility supports high-speed digital timing environments. The reported typical power dissipation is 350 mW, making thermal design and power-plane return paths important in dense systems. The SY605 architecture uses the Micrel-Synergys proprietary ASSET bipolar process, according to the manufacturer datasheet information supplied in the verified results. Its differential control inputs and fine delay granularity make it more appropriate than a general-purpose fixed delay line when the delay must be changed by a digital control word. The 28-LCC package preserves a conventional leaded footprint for through-hole or mixed-technology assemblies, but the exact pin names and electrical limits must be confirmed against the official datasheet before layout release. Typical applications include high-speed clock calibration, digital timing alignment, pulse-position control, phase-shift generation, instrumentation, and ECL-compatible timing modules. The device is particularly relevant where a retriggerable event and programmable 15 ps increments simplify calibration or phase alignment. When designing around the SY605JC-TR, preserve the differential input topology and provide adequate decoupling and controlled return paths. Treat the 350 mW typical dissipation as a design input, then verify package thermal performance against the actual board copper and ambient temperature. Avoid assuming the 28-LCC package is interchangeable with a surface-mount package without a footprint and pinout review. This page consolidates the verified distributor descriptions, timing specifications, package information, and replacement-search status for SY605JC-TR. It separates confirmed values from unavailable details rather than estimating pin assignments, pricing, lifecycle, or electrical limits.
SY605JZ - 255-Tap Programmable Delay Line | Microchip
The Microchip Technology SY605JZ is a programmable delay-line clock and timing IC with 255 taps, 4 ns to 40 ns total delay range, and 15 ps delay resolution in a 28-LCC J-lead package. It supports a true 125 MHz retrigger rate and differential TRIGGER and delay WRITE inputs, making it suitable for deterministic timing alignment in communications, instrumentation, and test systems. The SY605JZ uses one independent delay path and provides less than ±1 LSB timing accuracy. A programmable delay line is a timing-control integrated circuit that introduces a digitally selectable interval between an input edge and its corresponding output. It belongs to the clock-and-timing IC hierarchy, where delay lines support calibration, phase alignment, pulse positioning, and clock compensation. Unlike a general-purpose digital delay, this device provides a calibrated tap-based delay structure for fine timing adjustment. Key features include 255 programmable taps, a 4 ns delay to the first tap, a 40 ns maximum total delay, and 15 ps resolution. Its differential TRIGGER and delay WRITE inputs support robust control-interface design. The less-than-±1-LSB timing-accuracy specification gives engineers a quantified basis for selecting tap values when precise event placement is required. The SY605JZ is intended for high-speed timing systems where deterministic delay calibration and repeatable retriggering matter. Its 125 MHz retrigger rate allows successive trigger events to be accepted at high repetition rates, while the programmable tap count provides fine control over relative timing. The component is packaged as a 28-LCC J-lead device, with tube packaging identified for SY605JZ and tape-and-reel identified for the SY605JZ TR ordering variant. Typical uses include clock phasing, pulse-width calibration, time-interval measurement, communication timing alignment, and laboratory or industrial test equipment. Because it is a delay-line IC rather than a general clock generator, designers should evaluate input edge requirements, output timing, control logic, and PCB propagation effects together when defining the external timing budget. A key design consideration is to preserve controlled edge rates and isolate sensitive timing paths from unnecessary noise. The datasheet-supported TRIGGER and delay WRITE interface should be driven with compatible logic, while power and ground connections should be routed to minimize return-path disturbance. Engineers should also verify all operating conditions against the manufacturer datasheet. This page consolidates distributor pricing, verified timing specifications, package details, and application guidance. It also distinguishes the SY605JZ from SY605JZ TR as a packaging variant rather than presenting the TR suffix as a different functional device, while clearly identifying where a full pinout or verified drop-in substitute is unavailable in the supplied data.
SY69753LHC - 155Mbps CDR Multiplexer IC | Microchip Technology
Microchip Technology SY69753LHC is an application-specific clock and data recovery (CDR) IC for Ethernet, SONET/SDH, and ATM OC-3 communications, operating at up to 155Mbps with one output in a 32-TQFP-EP (7x7) package. It is designed for high-speed serial interfaces requiring recovered clock and data multiplexing. A clock and data recovery IC is a timing IC that extracts a synchronized clock from a serial data stream and aligns recovered data with that clock. In the signal hierarchy, a CDR belongs to clock and timing ICs, timing recovery ICs, interface ICs, and ultimately the broader semiconductor category. The SY69753LHC targets telecommunications transport networks operating at OC-3-class data rates. Key verified features include a maximum data rate of 155Mbps, support for Ethernet, SONET/SDH, and ATM OC-3 interfaces, one recovered output, and a 3.3V supply identified by the distributor listing. The component integrates the functions normally associated with a serial-interface multiplexer and timing-recovery circuit into one package. Its 32-TQFP-EP (7x7) surface-mount package supports compact telecommunications and networking equipment. The IC is positioned for systems in which a 155Mbps serial stream must be recovered and routed while maintaining timing alignment with associated channel-interface circuitry. Compared with passive clock distribution, a CDR performs an active timing function. Compared with a general-purpose transceiver, its application-specific architecture is directed specifically toward Ethernet, SONET/SDH, and ATM OC-3 interface requirements rather than a broad range of data rates. Typical uses include optical transport equipment, SONET/SDH line-interface modules, ATM OC-3 line cards, packet-network timing subsystems, and legacy or migration-era 155Mbps Ethernet interfaces. In each case, system designers must account for the device's specific reference-clock topology, input/output data format, jitter requirements, and termination network because those detailed implementation values are not contained in the supplied web data. The primary design consideration is board-level timing integrity. A 155Mbps CDR can be sensitive to trace discontinuities, impedance mismatches, return-path discontinuities, and inadequate reference-clock conditioning. Designers should follow the manufacturer's layout and component-selection guidance, preserve continuous ground and power planes, and validate the complete channel rather than relying only on nominal data-rate compatibility. This page consolidates the verified distributor specifications, package information, application context, sourcing links, and replacement limitations for the SY69753LHC. It also distinguishes verified facts from electrical parameters that still require confirmation from the manufacturer datasheet, helping engineers make sourcing and design decisions without treating search-result summaries as a complete electrical specification.