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SY58051AUMG - 10.7Gbps CML AnyGate, 16-QFN | Microchip
SY58051AUMG

SY58051AUMG - 10.7Gbps CML AnyGate, 16-QFN | Microchip

The Microchip Technology SY58051AUMG (originally Micrel Semiconductor) is an ultra-precision CML AnyGate universal differential logic gate with internal input and output termination, delivering a guaranteed maximum throughput of 10.7Gbps for data or 8GHz for clock signals, housed in a 16-pin QFN (3x3 mm) package with exposed pad. A CML (Current-Mode Logic) AnyGate is a configurable differential logic device that can implement many Boolean functions of two variables through pin strapping or configuration, rather than requiring a fixed gate type such as AND, OR, XOR, or multiplexer. Within the signal-chain hierarchy, it belongs to the family of high-speed logic ICs, sitting between pure clock buffers and full FPGA-based glue logic, and serves as a universal building block in high-speed digital, clocking, and data-conversion subsystems. Key differentiating features include the 10.7Gbps / 8GHz guaranteed throughput, ultra-low deterministic and random jitter performance suitable for SONET and Gigabit Ethernet clock trees, and a unique internal input termination network accessible via a dedicated VT pin. This VT-pin architecture allows the differential inputs to interface to different logic standards, both AC-coupled and DC-coupled, without external resistor-bias or termination networks, producing a clean, stub-free, low-jitter interface solution. Technically, the SY58051AU implements a 1:1 differential clock/data multiplexer function with CML output levels and integrated 50-ohm-style terminations, which reduces component count, minimizes stub reflections on the input traces, and improves signal integrity at multi-gigabit rates. The exposed-pad QFN-16 package provides a low-inductance ground path essential for jitter performance at these speeds. Typical applications include clock distribution and fanout trees for high-speed ADCs and FPGAs, SONET/SDH and 10G Ethernet line-card timing, retiming and multiplexing of redundant clock sources, and serial data path glue logic in optical modules and test instrumentation. Design consideration: the VT pin flexibility means the input termination should be configured deliberately for the source logic standard; AC-coupled sources require proper VT biasing to keep the input common-mode within the datasheet range. Keep the differential traces impedance-controlled at 50 ohms single-ended. This page synthesizes distributor pricing (LCSC from $20.10 as of 2026-10-10), family-based drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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SY58051AUMG-TR - 10.7Gbps CML AnyGate Logic | Microchip
SY58051AUMG-TR

SY58051AUMG-TR - 10.7Gbps CML AnyGate Logic | Microchip

The Microchip Technology SY58051AUMG-TR is an ultra-fast, low-jitter universal CML logic gate (AnyGate) with a guaranteed maximum data throughput of 10.7 Gbps or clock throughput of 8 GHz, housed in a 16-pin QFN (3x3 mm) package with exposed pad. It operates from a 2.3 V to 3.465 V supply (2.5 V and 3.3 V nominal) across -40C to +85C. A universal logic gate is a differential high-speed gate that can be configured to realize many Boolean functions of two variables, such as AND, OR, NAND, NOR, XOR, and XNOR, by strapping or biasing its inputs. Within the signal-chain hierarchy it sits in the logic IC family alongside gates and inverters, but unlike standard CMOS logic it is built on a precision CML (current-mode logic) architecture optimized for multi-gigabit serial links rather than for static power savings. Key features include differential CML inputs and outputs with internal input and output termination, eliminating external resistor-bias and termination networks; a VT pin that exposes the input termination network for easy AC- or DC-coupled interfacing to multiple logic standards (LVPECL, LVDS, CML); and picosecond-class jitter performance suitable for SONET, Fibre Channel, and 10 Gigabit Ethernet timing budgets. The internal termination design produces a clean, stub-free interface, reducing reflections and jitter contributions at the package boundary. Because termination is integrated, board designers save the discrete resistor networks typically required at 10 Gbps, improving signal integrity and layout density. The exposed-pad QFN-16 provides a low-inductance ground return essential for CML switching at multi-gigahertz edge rates. Typical applications include 10G Ethernet and Fibre Channel retiming paths, clock distribution and gating in high-speed test equipment, logic gating in optical module signal chains, and protocol translation between CML, LVDS, and LVPECL domains. A key design consideration: the VT pin must be biased correctly for the chosen logic standard and coupling mode; AC-coupled CML and DC-coupled LVDS each require different VT configurations per the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet.

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SY604JC - 255-Tap 4-40ns Programmable Delay | Microchip
SY604JC

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.

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SY604JC-TR - 255-Tap 4ns-40ns Delay Line | Microchip
SY604JC-TR

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.

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SY604JZ - 255-Tap 4-40ns Delay Line IC | Microchip
SY604JZ

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.

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SY604JZ-TR - 255-Tap 4-40ns Delay Line IC | Microchip (Tape & Reel)
SY604JZ-TR

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.

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SY605JC - 125MHz 255-Tap Programmable Delay | Microchip
SY605JC

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.

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SY605JC-TR - 125MHz 255-Tap Programmable Delay | Microchip (Tape & Reel)
SY605JC-TR

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.

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SY605JZ - 255-Tap Programmable Delay Line | Microchip
SY605JZ

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.

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SY69753LHC - 155Mbps CDR Multiplexer IC | Microchip Technology
SY69753LHC

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.

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SY69753LHG - 155Mbps 3.3V PECL CDR | Microchip
SY69753LHG

SY69753LHG - 155Mbps 3.3V PECL CDR | Microchip

The Microchip Technology SY69753LHG is a 3.3 V clock and data recovery IC with a multiplexer function, designed for 125 Mbps and 155 Mbps PECL links associated with Ethernet, SONET/SDH, and ATM OC-3 systems. The device is supplied in a 32-pin TQFP with exposed pad, measuring 7 mm by 7 mm, and includes a PLL for timing generation and recovery. A clock and data recovery IC is a specialized timing-device category that regenerates a synchronized clock from a serial data stream, compensates for accumulated phase and timing jitter, and supports deterministic transfer across high-speed communication links. Within the broader hierarchy, the SY69753LHG belongs to clock and timing ICs, interface ICs, and ultimately integrated semiconductors used in telecommunications and data-networking equipment. Principal device characteristics include support for data rates of 125 Mbps and 155 Mbps, PECL input and output interfaces, one recovered output, PLL support, and a 3.3 V supply. The package combines a 7 mm by 7 mm body with an exposed pad that provides a thermal and ground connection on a multilayer PCB. Published distributor descriptions also identify the part as a surface-mount clock and timing device suitable for precise timing applications. The SY69753LHG is intended for designs where a transmitted serial stream must be recovered into a usable clock and data pair. Its PLL-based architecture can support clock recovery and phase alignment, while the multiplexer function consolidates timing-related signal routing. The 125 Mbps operating point covers Fast Ethernet-related infrastructure, and the 155 Mbps point aligns with ATM OC-3 and 155 Mbps SONET/SDH-class interfaces. The PECL interface requires source termination, correct common-mode voltage, and controlled-impedance board layout. Typical uses include ATM network interface equipment, SONET/SDH tributary synchronization, Fast Ethernet line-card clocking, telecommunications backplanes, and optical-transport modules. In these systems, the recovered clock reduces accumulated timing drift and provides a stable reference for downstream retimers, serializers, switching silicon, and test equipment. When laying out a circuit around the SY69753LHG, treat the exposed pad as a primary ground and thermal connection rather than an unused package feature. Route PECL clocks and data as short, controlled-impedance nets, provide the decoupling and termination required by the device application circuit, and verify source, receiver, and multiplexer compatibility before layout release. This page combines verified distributor specifications with an engineering-focused assessment of speed, interface type, package implementation, and replacement constraints. It also distinguishes the directly purchasable base part from a tape-and-reel ordering code and documents where complete electrical, pin-level, lifecycle, and pricing information requires confirmation.

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SY69753LHI - 155Mbps Clock Data Recovery | Microchip
SY69753LHI

SY69753LHI - 155Mbps Clock Data Recovery | Microchip

The Microchip SY69753LHI is a clock recovery and data retiming integrated circuit for OC-3/STS-3 applications operating at 155 Mbps NRZ, supplied in a 32-pin TQFP with exposed pad, 7 mm × 7 mm package. It provides one recovered clock output and is associated with 3.3 V operation, Ethernet, SONET/SDH, and ATM OC-3 signal-chain applications. A clock and data recovery IC, commonly abbreviated CDR, belongs to the clock and timing IC hierarchy within integrated circuits and semiconductor signal-conditioning devices. Its primary function is to recover a usable clock from a serialized data stream while retiming data against that recovered clock. This allows a receiver to maintain alignment between transmitted data and its associated timing information across a high-speed serial link. The verified product information identifies the SY69753LHI as a complete clock recovery and data retiming device for OC-3/STS-3 applications at 155 Mbps NRZ. It is listed as a 3.3 V, 155 Mbps application-specific clock and timing IC with one output. The exposed-pad TQFP construction provides a thermal and grounding interface on a 7 mm × 7 mm surface-mount package, although detailed pin names, input tolerances, jitter specifications, and AC timing limits are not present in the supplied source data. The device is intended for systems where a serial transmitter produces NRZ data at OC-3 or STS-3 rates and the receiver needs regenerated timing rather than a free-running local clock. In this role, the recovered clock can establish a timing reference for subsequent deserialization or return-path multiplexing. Because the verified listing classifies the part as a multiplexer IC with one output, system allocation should provide separate serialization and receive-path functions rather than assuming multiple independent recovered outputs. Typical applications include SONET/SDH terminal equipment, ATM OC-3 line interfaces, Ethernet-oriented 155 Mbps links, telecommunications line cards, and high-speed data transmission systems. The 155 Mbps NRZ operating mode is especially relevant to legacy and installed transport infrastructure where compliant line-card designs already specify this Micrel-family clock recovery function. A key design consideration is that the source data does not disclose the exact pin mapping, differential input amplitude, reference-clock requirements, loop bandwidth, or jitter-transfer behavior. Engineers should therefore obtain the manufacturer datasheet and verify signal integrity, termination, decoupling, and exposed-pad layout against the complete electrical specification before releasing a PCB or substituting any component. This page consolidates verified distributor descriptions, package information, sourcing links, application context, and design cautions. It also distinguishes documented facts from unavailable parameters so engineers can identify what must still be confirmed in the manufacturer datasheet before layout or production use.

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SY69952ZC - 155.52Mbps Clock Recovery IC | Microchip
SY69952ZC

SY69952ZC - 155.52Mbps Clock Recovery IC | Microchip

The Microchip Technology SY69952ZC is an OC-3/STS-3 clock-recovering transceiver operating at 155.52 Mbps with one output in a 28-SOIC package. It combines an ATM-compatible transmitter and receiver with clock and data recovery for Ethernet, SONET/SDH, and ATM transport equipment. The verified device data identifies the SY69952 family as a single-chip OC-3/STS-3 solution and specifically associates SY69952ZC with a 28-pin SOIC package. A clock-recovering transceiver is a clock-and-timing semiconductor that accepts high-speed serial data, recovers timing from the incoming signal, and supports transmission and reception within optical or network transport systems. In the broader hierarchy, it belongs to clock and timing ICs, interface ICs, and semiconductor signal-path components. Its primary value is integrating functions that otherwise require separate transmitter, receiver, and clock-recovery circuitry. The verified features include complete ATM-compatible single-chip transmitter and receiver integration, operation at 155.52 Mbps, one recovered-clock output, and compatibility with named ATM processor platforms. The available documentation also indicates seamless operation with PM5345, VNS67200, WAC-013-B/WAC-413-A, and NEC µPD98402 UNI processors. Electrical ratings, supply voltage, recovery thresholds, jitter performance, operating temperature, and package dimensions were not supplied in the retrieved data and therefore must be confirmed from the original manufacturer datasheet. SY69952ZC is suited to ATM and SONET/SDH equipment, OC-3/STS-3 line-interface assemblies, optical transport modules, network processor interfaces, and legacy synchronous multiplexing systems. Its 28-SOIC construction favors conventional surface-mount assembly, but high-speed signal integrity still depends on controlled impedance routing, solid return paths, and careful power-supply decoupling. The device should be evaluated against the original datasheet and processor-interface requirements before use in a new design. A key design consideration is that this is a legacy OC-3/STS-3 clock-recovery device rather than a general-purpose Ethernet PHY. Verify signal rates, logic levels, recovered-clock jitter, reference-clock requirements, and processor timing before replacing it with any modern interface. Lifecycle status and a documented drop-in replacement could not be established from the supplied results. This page consolidates the verified source links, procurement data availability, application context, and unresolved engineering information without inventing missing specifications.

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SY69952ZH - 155.52Mbps Clock Recovery IC | Microchip
SY69952ZH

SY69952ZH - 155.52Mbps Clock Recovery IC | Microchip

The Microchip Technology SY69952ZH is an OC-3/STS-3 clock-recovering transceiver with a stated operating rate of 155.52Mbps, one output, and a 28-pin SOIC package. It combines clock and data recovery with PECL-oriented interface information identified in the verified results. The device is intended for telecommunications equipment using Ethernet, SONET/SDH, and ATM-related transports, where recovered timing must be extracted from a high-speed serial signal. A clock and data recovery transceiver, or CDR, is an integrated circuit that receives a serial data stream, separates or reconstructs its timing relationship, and produces aligned clock and data outputs. In the optical-transport hierarchy, it sits between the line-side high-speed interface and downstream digital logic. The SY69952ZH is therefore a timing-integrity component rather than a general-purpose clock generator or ordinary digital interface IC. The verified product information identifies OC-3/STS-3 operation, a 155.52Mbps rate, PECL input information, one output, and compatibility with several ATM UNI processors. A separate technical result describes a clock-generator input range of 6.41MHz to 19.64MHz, but the supplied excerpts do not establish how that range maps to every operating mode, supply condition, or pin function. Engineers should therefore use the manufacturer datasheet for final acquisition and circuit-design decisions. The 28-SOIC package offers through-hole assembly in a 7.50mm-wide body format according to the distributor result. Its size and pin count make it practical for legacy telecommunications boards, industrial transmission equipment, and repair or modernization programs. The package is not a modern high-density surface-mount ball-grid-array solution, so board area and manual or automated through-hole compatibility should be considered. Typical uses include ATM UNI links, SONET/SDH tributary-rate equipment, Ethernet transport modules, and OC-3/STS-3 line cards. The recovered-clock function is valuable when the receiver must regenerate a stable timing reference before forwarding payload data. The verified material does not provide a full electrical characterization, recommended decoupling, propagation-delay distribution, jitter specification, or absolute maximum-rating table. When designing a replacement board, verify every pin against the official datasheet and preserve the original channel-length and impedance layout. PECL interfaces are sensitive to biasing, termination, trace geometry, and return paths, so a nominal pin-compatible package alone does not guarantee signal-integrity equivalence. Confirm supply voltage, logic thresholds, reference-clock requirements, and recovery-loop behavior before production use.

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SY87700LHI - 3.3V 175Mbps AnyRate CDR | Microchip Technology
SY87700LHI

SY87700LHI - 3.3V 175Mbps AnyRate CDR | Microchip Technology

The Microchip Technology SY87700LHI is a 3.3V AnyRate clock and data recovery integrated circuit for 32Mbps to 175Mbps NRZ data streams, housed in a 32-pin TQFP-EP (7x7 mm) package. It combines clock generation and clock-and-data recovery functions, provides one recovered output, and includes two on-chip phase-locked loops for telecommunications and high-speed digital-network applications. A clock and data recovery IC, or CDR, is a specialized timing and timing-recovery component that extracts a usable clock from an incoming data stream and can regenerate aligned data and clock outputs. In the broader semiconductor hierarchy, a CDR belongs to clock and timing ICs, phase-locked-loop-based timing ICs, and ultimately the wider integrated-circuit category. The SY87700LHI is specifically positioned for SONET, SDH, ATM, Ethernet, and other high-speed NRZ transmission systems. Verified features include operation from a single 3.3V supply, recovery of data rates from 32Mbps through 175Mbps, one output, and an industrial temperature range of -40°C to +85°C. Two integrated PLLs support clock generation and clock recovery, while the AnyRate architecture allows the device to accommodate a broad range of line rates rather than being restricted to one fixed frequency. These characteristics make it useful in line cards, routers, ATM equipment, SONET/SDH transport systems, and other synchronization-sensitive network equipment. The device accepts PECL input according to distributor and manufacturer-derived listing data. Its recovery and generation functions are implemented around phase-locked-loop timing, enabling it to recover a clock from a corrupted or distorted NRZ stream and present a regenerated output to downstream logic. Exact jitter, lock-time, input-output delay, output-current, and absolute-maximum-rating details were not included in the supplied verified extracts and should therefore be confirmed in the manufacturer datasheet before release to production. The 32-TQFP-EP package provides 32 perimeter pins plus a thermal or electrical center feature associated with the EP package designation. Compared with a conventional TQFP-32, the EP construction can improve heat transfer into a PCB copper plane. This is valuable in communications equipment where continuous clock-recovery activity can contribute to device dissipation even when the external interface rate changes. A key design consideration is that this is a legacy-style PECL timing IC rather than a general-purpose low-voltage CMOS interface device. PCB layout must provide controlled impedance, short high-speed traces, appropriate reference-plane continuity, and clean separation between noisy switching paths and the recovered clock and data outputs. Decoupling should follow the manufacturer datasheet layout, and the exposed-pad region should be connected according to its electrical and thermal requirements. This page consolidates verified distributor specifications, same-family replacement candidates, comparison parameters, and practical implementation guidance. It distinguishes verified facts from unavailable datasheet details so engineers can identify procurement choices, engineering trade-offs, and the remaining checks required before using the SY87700LHI in a new SONET, SDH, ATM, or Ethernet timing design.

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SY87700LSI - 3.3V AnyRate Clock and Data Recovery | Microchip
SY87700LSI

SY87700LSI - 3.3V AnyRate Clock and Data Recovery | Microchip

The Microchip Technology SY87700LSI is a 3.3 V AnyRate clock and data recovery integrated circuit supporting data rates from 32 Mbps to 175 Mbps and supplied in a 32-pin TQFP package. It is designed for high-speed NRZ communication systems where recovered clock and retimed data are required to reduce timing errors and jitter. An AnyRate clock and data recovery IC is a clock-and-timing device that extracts or recovers a usable clock from an incoming data stream and can retime the associated data. In the broader semiconductor hierarchy, this device belongs to clock and timing ICs, application-specific timing integrated circuits, and ultimately the wider semiconductor category. Its primary role is to support reliable signal transfer in SONET, SDH, ATM, and other high-speed data-transmission systems. The verified product information identifies a 3.3 V supply, an operating data-rate range of 32 Mbps to 175 Mbps, and AnyRate clock and data recovery operation. The Microchip family page additionally identifies the related SY87700 family as supporting rates up to 208 Mbps, indicating a broader family capability than the 175 Mbps figure stated for SY87700LSI. The industrial temperature range associated with the SY87700L family is -40°C to +85°C. The SY87700LSI integrates clock recovery and data-retiming functions in one device, reducing the need for separate recovery circuitry in a communication link. This integration can simplify board partitioning while helping maintain timing alignment between the recovered clock and outgoing data. Its 32-pin TQFP construction provides a conventional surface-mount interface for equipment assembled using standard semiconductor manufacturing processes. Typical uses include SONET and SDH transport systems, ATM links, telecommunications line equipment, and other NRZ-based high-speed data links where the transmitter and receiver require an elastic or recovered data interface. It may also support proprietary backplane or serial-link architectures operating within its specified 32 Mbps to 175 Mbps range. Designers should verify the complete datasheet for differential impedance, reference-clock requirements, jitter tolerance, loop bandwidth, bypass behavior, and power-supply sequencing before layout. Input and output return paths must be controlled because a clock-and-data recovery IC can amplify timing degradation when its input signal quality is inadequate. This product record consolidates the verified manufacturer specifications, distributor availability references, package information, and drop-in family comparison into an engineering-oriented guide. It distinguishes confirmed SY87700LSI data from parameters that still require confirmation from the full manufacturer datasheet.

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SY87700LZI - 175 Mbps AnyRate CDR | Microchip | 28-SOIC
SY87700LZI

SY87700LZI - 175 Mbps AnyRate CDR | Microchip | 28-SOIC

The Microchip Technology SY87700LZI is a 3.3 V AnyRate clock and data recovery integrated circuit for 32–175 Mbps NRZ data streams, with one recovered-clock output in a 28-pin SOIC package. It combines clock and data recovery with clock generation for Ethernet, SONET/SDH, and ATM applications, and uses two on-chip phase-locked loops to support the specified operating range. A clock and data recovery IC, commonly called a CDR, is a timing-integrity device that extracts a coherent clock from a serial data stream and regenerates data aligned to that clock. In the electronic-component hierarchy, a CDR belongs to clock and timing ICs, then to clock-data recovery and PLL-based timing conversion, and ultimately to integrated circuits used for signal integrity and network timing. This distinction from a general-purpose oscillator is important: the SY87700LZI is designed to recover timing directly from incoming NRZ data rather than merely generate a free-running reference frequency. The verified device information identifies a 3.3 V power supply, an operating data range of 32–175 Mbps, PECL input, and PECL or TTL output. The industrial temperature rating extends to +85 °C. Its two internal PLLs support clock generation and clock recovery, while its AnyRate architecture allows the recovered timing system to accommodate changing line rates through the documented operating range. The single-output organization is indicated by the distributor classification “Clock and Data Recovery (CDR), Multiplexer IC.” The SY87700LZI is intended for telecommunications and data-communication equipment where incoming serial streams must be retimed before reaching a downstream receiver, framer, or switching element. Suitable contexts include SONET/SDH line-interface equipment, ATM equipment, Ethernet-related interfaces, and optical or electrical backplanes operating within the supported 32–175 Mbps range. Its AnyRate capability can simplify designs that must support more than one standardized line rate without relying on a separate fixed-frequency clocking strategy. Design implementation requires careful attention to high-speed differential routing, PECL interface termination, supply decoupling, return paths, and output-amplitude compatibility. The manufacturer's datasheet states that input jitter tolerance is defined using the peak-to-peak sinusoidal jitter amplitude that causes an equivalent 1 dB optical or electrical power penalty; this definition should be used when evaluating system margin rather than assuming a simple bit-period budget. The 28-SOIC package also requires adequate lead spacing and assembly clearance during routing. This product data consolidates verified device specifications, source links, selection trade-offs, and application guidance beyond a raw distributor listing. It also clearly distinguishes confirmed characteristics from parameters that require confirmation in the manufacturer datasheet before schematic release, qualification, or production procurement.

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SY87700VHC - 175 Mbps AnyRate CDR | Microchip Technology
SY87700VHC

SY87700VHC - 175 Mbps AnyRate CDR | Microchip Technology

The Microchip Technology SY87700VHC is a 5 V/3.3 V AnyRate clock and data recovery integrated circuit for NRZ data streams operating from 32 Mbps to 175 Mbps. It combines clock recovery, clock generation, and multiplexing functions in a 32-pin TQFP package with an exposed pad. According to the manufacturer datasheet, the device is compatible with SONET, SDH, and ATM applications and provides 100K ECL-compatible I/O with link-fault indication. An AnyRate clock and data recovery, or CDR, is a timing-recovery integrated circuit used to extract a usable clock from a serial data stream and regenerate a synchronized output clock. A CDR belongs to the broader clock and timing IC hierarchy, where it supports communication links, network equipment, and optical-transport systems. Unlike a fixed-rate divider or basic clock buffer, the SY87700VHC can recover data across a stated 32 Mbps to 175 Mbps operating range and can also generate a clock from the same upper-rate class. The SY87700VHC supports both 5 V and 3.3 V power-supply options. Its two on-chip phase-locked loops divide the internal functions into one loop for clock generation and another for clock recovery. The available sources describe one output, while the exposed-pad TQFP package supports thermal management when the device operates continuously. Link-fault indication and ECL-compatible interfaces provide useful features for telecommunications and SONET/SDH-class designs. The architecture supports clock and data recovery from an NRZ data stream up to 175 Mbps and clock generation up to 175 Mbps. The datasheet search excerpt also identifies compliance with Bellcore, ITU/CCITT, and ANSI specifications for applications including OC-1, OC-3, FDDI, and Fast Ethernet. These protocol names describe supported legacy network and transport use cases rather than guaranteeing interoperability with every modern implementation. Typical uses include SONET/SDH equipment, ATM network interfaces, telecom line-card clocking, legacy optical transport links, and recovery paths in Ethernet-oriented equipment. The 100K ECL-compatible interface can be useful where legacy backplane logic levels are required. When using that interface, designers must confirm voltage compatibility, termination, signal integrity, and the exact operating mode against the manufacturer datasheet. For new layouts, use the 32-pin EPAD-TQFP rather than the 28-pin SOIC option that the datasheet notes is available but not recommended for new designs. Keep high-speed routing short, provide clean power and ground planes, and connect the exposed pad to the intended thermal and ground structure. Verify the exposed-pad layout and stack-up against the current Microchip package drawing before release to production. This product record consolidates the verified manufacturer and distributor information for the SY87700VHC and distinguishes documented capabilities from unavailable details. Numeric pricing, exact pin names, electrical limits, and verified drop-in replacements are not inferred when the supplied records do not provide them. It also provides practical application guidance, source links, and a structured comparison framework for engineers evaluating this legacy AnyRate CDR.

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SY87700VSC - 175Mbps CDR | Microchip Technology
SY87700VSC

SY87700VSC - 175Mbps CDR | Microchip Technology

The Microchip Technology SY87700VSC is an AnyRate clock and data recovery IC for Ethernet, SONET/SDH, and ATM equipment, operating at data rates from 32 Mbps to 175 Mbps with one recovered-clock output in a 28-pin SOIC exposed-pad package. The device supports 3.3 V and 5 V operation and uses differential PECL inputs and outputs. A clock and data recovery IC, or CDR, belongs to the clock and timing IC family within application-specific clock and timing semiconductors. It extracts a usable clock from a serialized data stream and can also recover or retime data when the system requires a cleaner relationship between clock and data. In telecommunications equipment, this function supports synchronization across high-speed network interfaces. The SY87700VSC supports data rates of 32 Mbps through 175 Mbps, making it applicable to legacy and emerging SONET/SDH, ATM, and Ethernet transport paths. Its 3.3 V and 5 V operating capability provides supply-voltage flexibility, while the differential PECL interface supports high-speed, noise-sensitive transmission links. The device is identified as a phase-locked-loop clock and data recovery product in the supplied cross-reference data. The integrated PLL architecture recovers timing information and establishes the relationship between the incoming serial stream and the recovered output. According to the manufacturer datasheet, the PLL complies with the proposed SONET/SDH jitter specifications in Bellcore GR-253-CORE, Issue 2, December 1995 and ITU-T Recommendation G.958 when used with differential inputs and outputs. Those standards appear directly in the supplied datasheet source. Typical deployments include SONET/SDH line-interface equipment, ATM switching and transmission systems, Ethernet network-interface modules, and telecommunications line cards. The 175 Mbps upper rate and one-output configuration are particularly relevant to designs that need recovered timing for an optical or copper transmission section rather than a general-purpose multi-channel clock synthesizer. Designers should preserve the differential input and output topology specified by the manufacturer and validate transmission-line impedance, termination, and jitter performance in the final board environment. The exposed-pad package also requires careful thermal and layout treatment so that heat is transferred through the pad and ground-plane area rather than concentrated beneath the device. This page consolidates the verified 175 Mbps, 32 Mbps to 175 Mbps, 3.3 V/5 V, differential PECL, package, application, and standards information into an engineering-oriented product record. It also distinguishes verified characteristics from unspecified electrical details and avoids presenting unavailable pricing or pin data as confirmed facts.

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SY87700VZC - 175Mbps AnyRate CDR | Microchip Technology
SY87700VZC

SY87700VZC - 175Mbps AnyRate CDR | Microchip Technology

The Microchip Technology SY87700VZC is a 175 Mbps AnyRate clock and data recovery integrated circuit designed for Ethernet, SONET/SDH, and ATM applications. It supports 3.3 V and 5 V operation, accepts PECL input, and is housed in a 28-pin SOIC package measuring 7.50 mm wide. The device combines clock recovery, data recovery, and multiplexing functions for high-speed telecommunications and networking equipment. A clock and data recovery IC is a timing IC that extracts a coherent clock from a serial data stream and reconstructs data whose timing has degraded due to noise, jitter, or transmission losses. CDR devices belong to the clock and timing IC hierarchy and ultimately support synchronization in networking, optical transport, and digital communications systems. The SY87700VZC is an application-specific timing solution rather than a general-purpose fixed-frequency oscillator. The verified operating envelope includes data rates from 32 Mbps to 175 Mbps and operation from a 3.3 V or 5 V supply. Its AnyRate architecture supports a broad range of line rates, making it useful when one board design must accommodate multiple standardized transmission rates. The recovered clock and data outputs reduce the external circuitry needed to implement a compliant telecom or network interface. The SY87700VZC includes a phase-locked loop, as identified in the published specification data, and provides one recovered output. It is intended for SONET/SDH, ATM, and Ethernet systems where incoming serial data must be clocked and recovered before downstream processing. Input signaling is identified as PECL, which requires appropriate interface termination and level translation where the surrounding system uses another logic family. Typical deployments include SONET/SDH line cards, ATM switching equipment, optical transport modules, Ethernet backplane links, and telecommunications aggregation systems. A design can place the CDR between a high-speed serial receiver and the system's parallel processing or forwarding circuitry. Its 175 Mbps maximum rate supports legacy and intermediate-rate telecom links while its 28-pin SOIC package simplifies assembly on conventional surface-mount boards. The primary design consideration is verifying the complete signal environment. Board designers must accommodate the device's PECL input interface, provide suitable termination, maintain controlled routing for high-speed signals, and observe all supply and decoupling requirements in the manufacturer datasheet. Because the verified search data does not provide the complete electrical table or pin assignment, engineers should confirm those details before schematic capture or layout release. This page consolidates the verified distributor inventory information, AnyRate operating range, package details, and same-package family references into an engineering-focused comparison. It also distinguishes confirmed specifications from values that still require direct confirmation from the manufacturer datasheet.

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SY87701LHG - 1.25Gbps Any-Rate CDR | Microchip
SY87701LHG

SY87701LHG - 1.25Gbps Any-Rate CDR | Microchip

Microchip SY87701LHG is a 1.25 Gbps AnyRate clock and data recovery integrated circuit with one recovered output, optimized for 3.3 V systems and packaged in a 32-pin TQFP with exposed pad. The device supports clock and data recovery from data streams up to 1.25 Gbps and clock generation up to the same maximum rate, positioning it between general-purpose clock buffers and application-specific SONET/SDH, ATM, and Ethernet interface circuits. An AnyRate clock and data recovery, or CDR, IC is a timing-integrity component that extracts or reconstructs a usable clock from a serial data stream. It belongs to the clock and timing IC hierarchy, which includes clock buffers, clock generators, phase-locked loops, jitter attenuators, multiplexers, and data-recovery circuits. CDRs are particularly important where serial transmission introduces timing uncertainty, duty-cycle distortion, or inconsistent edge relationships that would otherwise impair receiver sampling. Key verified capabilities include operation from 32 Mbps to 1.25 Gbps, a single recovered output, a 3.3 V supply option, and use in Ethernet, SONET/SDH, and ATM equipment. A second search result describes the family as supporting both 5 V and 3.3 V supply options, while the exact SY87701LHG distributor listing identifies the offered device as the 3.3 V version. The product also supports clock generation in addition to recovery, allowing it to address transmit, receive, and network timing functions. The SY87701LHG is intended for communication systems where a 32-pin TQFP-EP package offers a practical balance between routing access, thermal performance, and assembly complexity. The exposed pad improves heat transfer from the integrated circuit to the PCB, but designers still need to follow the manufacturer's land-pattern and thermal-via requirements. Its AnyRate architecture is useful when one component must accommodate multiple line rates rather than requiring a separate fixed-rate recovery device for each operating mode. Typical application areas include Ethernet line-card and switching equipment, SONET/SDH transport systems, ATM network interfaces, and other serial communication platforms. These environments benefit from synchronized clocking, recovered data outputs, and clock generation from the same timing subsystem. The part may also support telecommunications backplanes and legacy data-communication equipment where NRZ serial links operate at rates through 1.25 Gbps. Designers should confirm signal integrity, loopback behavior, input/output timing, and supply requirements against the manufacturer datasheet before production release. PCB layout should provide a continuous return path, place decoupling capacitors close to the supply pins, and connect the exposed thermal pad to an appropriately sized ground or thermal copper plane according to the recommended land pattern. This page consolidates verified distributor specifications, sourcing information, application context, and package-specific guidance. It also distinguishes the confirmed tape-and-reel ordering code from the base device and clearly identifies the limited number of verified drop-in alternatives rather than presenting unverified substitutes as drop-in replacements.

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SY87701LHI - 1.25Gbps AnyRate CDR | Microchip Technology
SY87701LHI

SY87701LHI - 1.25Gbps AnyRate CDR | Microchip Technology

Microchip Technology SY87701LHI is a 3.3 V AnyRate clock and data recovery (CDR) integrated circuit designed for data rates from 32 Mbps to 1.25 Gbps, packaged in a 32-pin TQFP with an exposed pad. It recovers clock and data from NRZ data streams and generates clock signals from data as high as 1.25 Gbps, making it suitable for telecommunications timing, SONET/SDH, ATM, and other high-speed serial interfaces. A clock and data recovery IC is a timing subsystem that extracts a usable serial clock from an incoming data stream and aligns recovered data with that clock. Within the broader semiconductor hierarchy, the SY87701LHI is an integrated circuit, a clock and timing device, and a CDR. Its AnyRate architecture supports multiple line rates through one clock-recovery solution, reducing the need for separate recovery devices in multi-rate systems. Key verified characteristics include a 3.3 V power supply, an operating data-rate range of 32 Mbps to 1.25 Gbps, NRZ data recovery, and clock generation from a 1.25 Gbps stream. The device also provides an industrial-temperature option, according to the retrieved product documentation. The manufacturer documentation states that the PLL complies with the proposed jitter specifications for SONET/SDH equipment in Bellcore Specifications GR-253-CORE, Issue 2, December 1995 and ITU-T Recommendation G.958 when used with differential inputs and outputs. The device is intended for telecommunications equipment operating at OC-3, OC-12, and related serial-data rates. Its differential interface architecture and integrated clock-recovery function make it relevant to line cards, optical interface modules, SONET/SDH terminal equipment, ATM equipment, and other designs requiring synchronized NRZ data transfer. The exposed-pad TQFP construction also requires attention to thermal dissipation and PCB thermal design. A key design consideration is that the SY87701LHI is a high-speed timing device rather than a general-purpose logic IC. Differential routing, controlled impedance, solid reference planes, short return paths, and careful decoupling are essential for predictable signal integrity. The application circuit and pin assignments should be taken directly from the manufacturer datasheet, including the exposed-pad connection and differential input or output requirements. This product page consolidates the verified 3.3 V supply, 32 Mbps to 1.25 Gbps AnyRate operation, package information, timing-standard references, sourcing links, and practical integration guidance. Pin-level details not exposed in the supplied search evidence are intentionally left unspecified rather than inferred, allowing engineers to download the manufacturer PDF before layout or schematic release.

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SY87701LSI - 1.25Gbps Clock Data Recovery IC | Microchip
SY87701LSI

SY87701LSI - 1.25Gbps Clock Data Recovery IC | Microchip

Microchip SY87701LSI is a 3.3 V clock and data recovery (CDR) integrated circuit designed for protocol-independent recovery of serial data from 32 Mbps to 1.25 Gbps. The device combines clock and data recovery functions in a 28-lead SOIC package, making it suitable for high-speed telecommunications, networking, storage, and backplane interfaces. Its principal advantages are protocol independence, operation from a 3.3 V supply, and support for data rates extending to 1.25 Gbps. A clock and data recovery IC is a timing-integrity device that reconstructs a usable clock from a combined or separated serial-data stream. In the broader semiconductor hierarchy, a CDR is a clock-and-timing IC used to recover timing information corrupted by noise, jitter, propagation delay, and bandwidth loss. The SY87701 family therefore occupies the interface between high-speed serial communication and the clock-generation circuitry required by transmitters, receivers, serializers, and deserializers. The verified source information identifies the SY87701 as an AnyRate CDR operating from 32 Mbps to 1.25 Gbps at 3.3 V. AnyRate operation allows the same device to serve multiple link rates without changing the external data rate, which can simplify qualification inventories for equipment supporting more than one serial interface. The SY87701LSI orderable variant is listed with an advanced 28-lead SOIC package, although separate distributor snippets inconsistently describe the family with other package configurations. Protocol independence is the most important architectural feature for engineers evaluating this part. Instead of imposing a fixed encoding or transport protocol, the recovery circuitry is intended to work across compatible serial links. In a receive path, the recovered clock can provide a timing reference for subsequent deserialization or digital processing. Design work still requires checking the specific protocol, jitter tolerance, reference-clock requirements, input sensitivity, output characteristics, and board-level constraints in the manufacturer datasheet before release to production. Typical uses include telecom line cards, router and switch interfaces, optical-network equipment, backplane links, clock-generation subsystems, and high-speed test equipment. The device may be especially relevant where a 32 Mbps-to-1.25 Gbps AnyRate range is useful across a family of products. Designers should account for high-speed transmission-line behavior, controlled impedance, receiver sensitivity, reference-clock jitter, and connector or package parasitics when laying out the PCB. A critical design consideration is that distributor package descriptions are not fully consistent for the SY87701 family. The available source identifies SY87701LSI as a 28-lead SOIC variant, while other family listings mention a 32-pin TQFP. Confirm the exact mechanical drawing, pin numbering, exposed-pad requirements, and exposed pad status directly against the manufacturer documentation before ordering or substituting any related MPN. This page consolidates the verified Microchip family data, distributor availability information, sourcing links, and engineering guidance into one component record. It also distinguishes confirmed attributes from parameters that still require the manufacturer datasheet, helping engineers evaluate SY87701LSI without treating incomplete distributor descriptions as verified specifications.

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SY87701LZI - 3.3V 1.25Gbps AnyRate CDR | Microchip Technology
SY87701LZI

SY87701LZI - 3.3V 1.25Gbps AnyRate CDR | Microchip Technology

The Microchip Technology SY87701LZI is a 3.3V AnyRate clock and data recovery IC for NRZ data streams operating from 32Mbps to 1.25Gbps, housed in a 28-pin SOIC package. The device performs clock and data recovery from data streams up to 1.25Gbps and generates a recovered clock up to 1.25Gbps, making it suitable for telecommunications and synchronous digital data links. An AnyRate clock and data recovery IC is a timing-recovery component that extracts a usable clock from a serial data stream and retimes the associated data. Its position within the broader semiconductor hierarchy is clock and timing IC → clock and data recovery IC → integrated circuit → semiconductor. The technology is intended for systems where the transmitting clock is not separately available at the receiver or where accumulated timing drift must be continuously corrected. The verified specifications identify a 3.3V power supply, an operating data-rate range of 32Mbps to 1.25Gbps, and recovery-clock generation up to 1.25Gbps. The SY87701LZI also has an industrial temperature-range option, according to the Micrel datasheet information included in the search results. These characteristics make the device relevant to telecom backplane links, optical transport systems and other high-speed serial interfaces operating with NRZ-coded data. The Micrel device is described as complying with Bellcore, ITU/CCITT and ANSI specifications for applications such as OC-3 and OC-12. It supports clock and data recovery directly from an NRZ data stream, reducing the need for separate source-synchronous clocking across long or timing-sensitive interconnects. Exact architecture details, loop bandwidth, input sensitivity, jitter tolerance, supply-current limits and pin-level signal definitions are not available in the supplied verified records and therefore require confirmation from the manufacturer datasheet. Typical applications include SONET or optical-transport equipment, telecom line cards, high-speed backplanes and serial data links requiring recovered clock and data outputs. In an OC-3-class interface, its 1.25Gbps maximum recovery rate provides operating margin above the nominal line rate. In a lower-rate telecom or proprietary serial link, the 32Mbps lower limit allows one device family to cover multiple interface rates when the surrounding system supports the required encoding and reference-clock architecture. Designers should confirm the exact pin assignment, reference-clock requirements, input and output logic levels, jitter characteristics and recommended decoupling directly from the Micrel datasheet before layout. The 28-SOIC footprint requires careful high-speed routing, short return paths and controlled impedance. Input and output timing must be evaluated for the target data rate because compliance claims alone do not replace board-level signal-integrity validation. This page consolidates the verified distributor price, availability, package information and core SY87701LZI specifications, then adds practical sourcing, selection and implementation guidance. It also distinguishes verified facts from parameters that still require manufacturer confirmation, helping engineers avoid treating search-result summaries as a substitute for the complete datasheet.

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