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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.
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.
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.
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.
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.
SY87701VHC - 1.25Gbps AnyRate CDR | Microchip Technology
The Microchip Technology SY87701VHC is an AnyRate clock and data recovery multiplexer IC that supports NRZ data rates from 32 Mbps to 1.25 Gbps in a 32-pin TQFP exposed-pad package. It accepts 3.3 V or 5 V supply configurations, supports PECL or TTL inputs, and provides a PECL output for Ethernet, SONET/SDH, ATM, Fibre Channel, and other high-speed communication systems. A clock and data recovery IC, or CDR, is a specialized timing integrated circuit that extracts or regenerates a serial clock from a high-speed data stream and aligns the recovered data for downstream processing. The SY87701VHC belongs to the clock and timing IC hierarchy, where it combines clock recovery, data retiming, and multiplexing functions. Its AnyRate operating concept allows one circuit to serve multiple line rates rather than requiring a separate fixed-rate recovery device. Key features include support for 32 Mbps through 1.25 Gbps NRZ data, a maximum operating frequency of 1.25 Gbps, 3.3 V and 5 V power-supply options, and PECL or TTL input compatibility. The recovered clock can operate at up to 1.25 Gbps, while the PECL output is suitable for high-speed optical, ATM, SONET/SDH, and Fibre Channel interfaces. The exposed pad supports improved thermal performance on a 7 mm × 7 mm surface-mount package. The SY87701VHC integrates a phase-locked-loop-based clock recovery architecture with clock and data multiplexing functions. This architecture allows a shared source to feed the device while the internal recovery and multiplexing paths support high-speed serial links. Its dual input and output logic families make it useful when a board must interface between TTL/CMOS-style digital sources and ECL-family PECL links, although input levels, termination, and supply voltage must be verified against the manufacturer datasheet. Typical applications include 1.25 Gbps Fibre Channel equipment, ATM switching systems, SONET/SDH line interfaces, Ethernet transmission equipment, and other recovered-clock or retimed-data designs. The device is most appropriate where a designer needs multiple supported rates, direct clock recovery, and a multiplexed high-speed output within one communication subsystem. A critical design consideration is that high-speed PECL and TTL interfaces require controlled impedance routing, correct reference-plane return paths, and carefully placed termination. Power and ground distribution must also be designed to limit disturbance from the clock recovery circuitry. Before layout, engineers should confirm the exact pin assignment, differential clock requirements, input thresholds, and exposed-pad connection details in the manufacturer datasheet. This page consolidates the verified distributor specifications, source links, package information, pricing status, application guidance, and data limitations for SY87701VHC. It also distinguishes verified facts from parameters that still require confirmation from the manufacturer datasheet, helping engineers evaluate the IC without relying on unverified substitute parts.
SY87701VZH - 1.25Gbps AnyRate CDR | Microchip Technology
The Microchip Technology SY87701VZH is an AnyRate clock and data recovery IC for 32 Mbps to 1.25 Gbps NRZ data streams, offered in a 28-pin SOIC package with 3.3 V and 5 V power-supply options. It provides one recovered clock output and supports clock generation as well as clock and data recovery for Ethernet, SONET/SDH, and ATM equipment. A clock and data recovery IC is a timing IC that reconstructs a usable clock from a serial data stream whose original clock has become embedded in the data or has otherwise become unusable. In the broader semiconductor hierarchy, a CDR belongs to clock and timing ICs, which support communication ICs and network infrastructure equipment. The SY87701 is designed for protocol-independent recovery over a broad speed range rather than one fixed line rate. The primary operating range is 32 Mbps to 1.25 Gbps using NRZ signaling. The device can recover clock and data or generate clock from a suitable input stream, giving system designers flexibility across optical, serial-network, and test-equipment signal paths. Its 3.3 V and 5 V supply options broaden its use across communications equipment, while the single recovered-clock output provides a straightforward clock-recovery function. The SY87701 family is associated with Bellcore, ITU/CCITT, and ANSI applications including OC-3, OC-12, ATM, and FDDI environments. These references describe the communications standards and legacy transport systems addressed by the device; they do not imply that every downstream equipment design automatically meets a complete compliance specification. System designers must still control the source, data path, jitter tolerance, and output interface. Typical uses include Ethernet line cards, SONET/SDH transport modules, ATM equipment, clock-recovery modules, and instrumentation that accepts NRZ serial data. In these systems, the recovered clock can provide a timing reference for deserializers, controllers, or downstream digital logic. Its AnyRate capability is especially useful when a product family must support several standardized line rates with one clock-recovery device. Designers should preserve the differential data and clock topology recommended by the manufacturer datasheet, provide clean return paths, and validate timing margins across the complete 32 Mbps to 1.25 Gbps range. Input amplitude, jitter, duty-cycle distortion, and board loss can constrain usable margin even when the nominal data-rate range is supported. This product page combines verified manufacturer and distributor information with package, sourcing, application, and design guidance. It also distinguishes the tube-packaged SY87701VZH from related ordering information and documents the limits of the available substitute and compliance data rather than inferring unverified drop-in replacements.
SY87729LHG - 365MHz Fractional Clock Synthesizer | Microchip
The Microchip Technology SY87729LHG is a 365 MHz fractional-N clock synthesizer IC with one differential PECL output, packaged in a 32-pin TQFP with exposed pad. The supplied product information identifies it as an AnyClock device for Ethernet, Fibre Channel, SONET/SDH/ATM, and related networking infrastructure. Its 3.15 V minimum supply voltage, 3.3 V operating class, 1:1 input-to-output ratio, and differential signal arrangement support clock-generation requirements where deterministic, low-skew distribution is important. A fractional-N synthesizer is a clock-and-timing IC that uses a phase-locked loop to create an output frequency related to a reference frequency while supporting fractional division. Within the clock-and-timing hierarchy, the SY87729LHG belongs to the PLL-based synthesizer category. This positioning distinguishes it from simple oscillators and fixed-ratio clock buffers: the device is intended to derive precise communications-clock frequencies from an external reference and then deliver a differential PECL output. The verified product record identifies the SY87729LHG as a monolithic fractional synthesizer with PLL capability, one output circuit, a 1:1 input-to-output ratio, and differential input and output operation. Its maximum frequency is listed as 365 MHz. The part is marked obsolete in the supplied datasheet-derived listing, so it should be treated as a legacy clock source for maintenance, replication, and redesign analysis rather than a recommended choice for a new production program. The SY87729LHG is particularly relevant to networking equipment requiring Ethernet, Fibre Channel, or SONET/SDH/ATM clocking. A single output allows it to support a dedicated clock-generation channel, although system-level designs may require additional buffers, dividers, or distribution ICs. Differential PECL interfacing can reduce susceptibility to common-mode noise when the source and receiver use controlled impedance and properly terminated networks. Designers should verify the complete pinout, reference requirements, jitter specifications, supply tolerances, and exposed-pad land pattern from the manufacturer datasheet before making a replacement. The exposed pad requires a low-impedance ground connection and adequate thermal copper. Differential input and output traces should have controlled impedance, short return paths, and symmetrical routing. This product record combines the verified 365 MHz fractional-synthesizer specifications, package information, lifecycle status, and source links with explicit uncertainty markers where pricing and detailed electrical data were not available. It also separates genuinely verified drop-in alternatives from unverified cross-reference results so engineers can make a safer sourcing and redesign decision.
SY87729LHI - 365MHz Fractional-N Clock Synthesizer | Microchip
The Microchip Technology SY87729LHI is a fractional-N clock synthesizer IC with a 27 MHz input, a maximum output frequency of 365 MHz, one clock output, and differential PECL interfaces. It operates from a 3.15 V to 3.45 V supply in a 32-pin TQFP exposed-pad package. The SY87729LHI is intended for telecommunications clocking applications involving Ethernet, Fibre Channel, SONET, SDH, and ATM systems. A clock synthesizer is a clock-and-timing semiconductor that converts one or more reference inputs into synchronized output clock signals. Fractional-N architectures divide an integer reference frequency by an integer and a fractional ratio, allowing fine output-frequency resolution without changing the crystal reference itself. Within the broader semiconductor hierarchy, this device is a clock generator and timing IC used to support communication infrastructure, network equipment, and data-transmission systems. The verified product information identifies a 27 MHz reference input, operation up to 365 MHz, one output, PECL input and output interfaces, and a narrow 3.15 V to 3.45 V operating-supply range. Its operating temperature range is -40°C to 85°C. These characteristics make the device applicable where a conventional integer-N divider cannot provide the required output-frequency resolution. The fractional-N synthesis architecture supports programmable clock ratios while retaining an externally supplied reference. PECL signaling is intended for high-speed clock distribution in telecommunications equipment, although interface amplitude, termination, and routing require board-level verification. The 32-pin TQFP exposed-pad package provides a defined thermal path when the device is mounted with its exposed pad soldered according to the manufacturer land pattern. Typical uses include line-card clock generation, Ethernet and Fibre Channel interface modules, SONET or SDH transport equipment, and ATM-based network systems. In each case, the 365 MHz maximum output supports high-rate clock generation while the fractional division capability allows the output frequency to be adjusted more closely to the system requirement than an integer-only divider. Designers should verify all divider settings, output-drive strength, jitter, reference purity, and loop-bandwidth requirements against the manufacturer datasheet before production release. The 3.15 V to 3.45 V supply range requires a regulator or rail capable of maintaining the specified voltage, and the exposed pad needs careful PCB layout for effective heat removal. This page consolidates the verified SY87729LHI operating limits, package information, cross-reference results, procurement caveats, and engineering guidance. It also separates confirmed manufacturer-grade facts from unavailable details so designers can identify what must still be checked in the official SY87729LHI datasheet before schematic release.
SY87729LHY - 365MHz Fractional-N Clock Synthesizer | Microchip
Microchip Technology SY87729LHY is a 3.3V rate-independent fractional-N frequency synthesizer that generates a differential PECL reference from a single input source. The device covers a 10MHz to 365MHz output range and is supplied in a 32-pin TQFP package with an exposed pad. Verified distributor data identifies it as a clock synthesizer and jitter-cleaning device, while the manufacturer datasheet describes support for standards-compliant transport reference generation. A fractional-N synthesizer is a clock and timing IC that synthesizes programmable frequencies from a stable reference. Its hierarchy is fractional-N synthesizer > PLL-based clock generator > clock synthesizer > clock and timing IC > semiconductor. This technology is particularly useful when a system needs a precise communications reference without relying on a separate crystal oscillator for every output frequency. Differential PECL outputs provide complementary signals suited to high-speed digital clocking and optical-transponder systems. The SY87729LHY operates from a 3.3V supply and synthesizes frequencies from 10MHz to 365MHz using a single reference source. The verified search material specifically describes a 27MHz reference input and a maximum output of 365MHz. It generates the correct differential PECL reference required by the Micrel SY87721L combined clock-and-data-recovery and clock-multiplier-unit device, whose associated data rate range extends from 10Mbps to 2.7Gbps. Fractional-N synthesis permits accurate generation of transport-related reference frequencies with or without forward-error correction. This is valuable in systems requiring standards-compliant downstream data units even when the associated upstream interface produces no signal. Exact phase-noise, jitter, reference-input, output-frequency, and divider specifications are not included in the supplied excerpts and must be confirmed in the manufacturer datasheet before final timing-budget approval. Typical uses include optical transponders, SONET-compatible transport equipment, Ethernet-compatible clocking systems, and other communications links driven by the SY87721L. In these applications, the synthesizer establishes the local reference required by the downstream CDR/CMU, while the 365MHz upper output range provides headroom for demanding clock rates. Board-level signal integrity and differential clock routing remain essential because high-speed edge quality is not determined by output frequency alone. Designers should place the input, output, and bypass connections as shown in the manufacturer application guidance, maintain short return paths, and use controlled-impedance routing for differential PECL pairs. The exposed pad should be connected to the ground plane according to the datasheet thermal and layout instructions. Because detailed termination and decoupling values were not supplied here, those values must be taken directly from the SY87729L manufacturer datasheet rather than inferred. This product summary combines verified manufacturer and distributor information, pricing available as of 2026-10-28, same-family replacement information, and practical guidance for evaluating the SY87729LHY. It highlights where verified data is complete and marks unresolved electrical, environmental, pin-level, and lifecycle details rather than presenting unsupported assumptions as specifications.
SY87739LHG - 729 MHz Fractional-N Synthesizer | Microchip Technology
Microchip Technology SY87739LHG is a fractional-N frequency synthesizer designed for high-performance data transport systems, with a maximum output frequency of 729 MHz, PECL inputs and outputs, and a 32-TQFP-EP package measuring 7 x 7 mm. The device is assigned to the application-specific clock and timing category and supports Ethernet, Fibre Channel, SONET/SDH, and ATM clocking applications. A fractional-N frequency synthesizer is a clock-generation IC that uses a phase-locked loop to produce an output frequency derived from a reference clock. Its fractional division capability permits frequency synthesis between integer division ratios, making this device category useful when an exact output frequency is required without changing the external reference. In the system hierarchy, the SY87739LHG is a PLL-based clock synthesizer, a specialized member of clock and timing integrated circuits and a semiconductor. The key documented features are a maximum output frequency of 729 MHz, differential PECL input and output interfaces, a 1:1 input-to-output ratio, and operation from a 3.3 V supply identified in the available product data. The listed frequency range extends from 10 MHz to 729 MHz. Its differential clocking architecture is intended to support high-speed data transport systems where signal integrity and clock quality are important design considerations. The SY87739LHG belongs to Microchip Technology's AnyClock family and uses a fractional-N synthesis architecture. The available product listing identifies the PLL feature and one output circuit. The 32-pin TQFP package with an exposed pad provides a defined surface-mount footprint for equipment requiring high-frequency clock generation in a moderately compact package. Typical applications include Ethernet line cards, Fibre Channel systems, SONET/SDH transport equipment, ATM networks, and other high-performance data transport platforms. In these systems, the synthesizer can establish a required internal operating frequency from a stable reference while supporting high-speed differential clock distribution. Equipment designers should also account for reference quality, loop bandwidth, jitter, supply integrity, and output termination. A key design consideration is that the listed device status is obsolete. Existing equipment can continue to use the documented SY87739LHG configuration, but new designs should not assume current production availability. The 7 x 7 mm exposed-pad package also requires a PCB footprint and thermal design consistent with the manufacturer's package drawing, particularly when the adjacent circuitry or exposed pad is used for heat removal. This page combines the verified distributor and manufacturer-listing information with application guidance, lifecycle context, a specification-gap inventory, and transparent replacement analysis. Because the supplied cross-reference results identify search tools but do not name a verified pin-compatible substitute, it does not present unverified parts as drop-in replacements.
SY87739LHI - 729MHz Fractional-N Synthesizer | Microchip
Microchip Technology SY87739LHI is a protocol-transparent, 3.3 V fractional-N frequency synthesizer with one differential PECL output, an output-frequency range of 10 MHz to 729 MHz, and operation from a single 27 MHz reference source. The device is supplied in a 32-pin TQFP with exposed pad package, designated 32-TQFP-EP (7x7) by DigiKey. Its architecture provides rate-independent synthesis for communications equipment requiring exact frequencies associated with Ethernet, Fibre Channel, SONET/SDH, and ATM protocols. A fractional-N synthesizer is a clock-generation IC that derives an output clock from a stable reference while using fractional division to produce frequencies that are not limited to integer ratios of the reference. The SY87739LHI belongs to the broader clock and timing hierarchy: fractional-N frequency synthesizer, clock generator, timing IC, and integrated circuit. This makes it useful where a system requires a programmable or protocol-related clock while retaining the operational simplicity of a single-reference architecture. The primary electrical features include a 10 MHz to 729 MHz synthesis range, a maximum characterized output frequency of 729 MHz, one differential PECL output, and 3.3 V operation. A 27 MHz reference allows the synthesizer to generate exact frequencies used by common transport protocols, with or without forward-error correction. Protocol transparency is important because the generated frequency can follow the required clock relationship rather than being limited to a fixed integer divider ratio. The SY87739L integrates a complete rate-independent frequency-synthesis function in one IC. It is specified for Ethernet, Fibre Channel, SONET/SDH, and ATM clock-generation requirements, making it particularly relevant to optical transponders, line cards, clocking subsystems, and communications test equipment. Its differential PECL interface supports high-speed clock distribution, although board-level implementation still requires correct differential routing, controlled impedance, and power-supply decoupling. Typical uses include SONET/SDH transponder reference generation, Fibre Channel interface clocking, Ethernet equipment clock synthesis, ATM networking hardware, optical transport modules, and laboratory communication test systems. Designers should confirm that the selected output frequency, reference configuration, PECL termination, and thermal conditions match the exact datasheet operating requirements before releasing production hardware. PCB implementation requires careful treatment of the exposed pad and high-speed clock nets. The exposed pad should be connected to the ground plane through the manufacturer-recommended thermal-via pattern, while input, output, and supply connections should be kept short. PECL output biasing and any downstream termination must follow the reference circuit because incorrect termination can alter edge quality, current consumption, and clock amplitude. This product record combines the verified manufacturer and distributor data with practical selection criteria for protocol timing, package-aware alternatives, and implementation considerations. It highlights where verified electrical data is available and marks undisclosed electrical, lifecycle, pricing, and pin-level information explicitly rather than inferring values that are not supported by the supplied sources.
SY89426JC - 622.08MHz SONET Clock Synthesizer | Microchip
The Microchip SY89426JC is a clock and frequency synthesizer IC that generates 622.08 MHz and 155.52 MHz clocks for SONET OC-12 and OC-3 systems, with a maximum output frequency of 622.08 MHz and a 28-pin J-lead LCC package. A clock synthesizer is a timing IC that derives one or more precisely related output frequencies from an external reference clock. Within the hierarchy of clock and timing integrated circuits, it supports communication infrastructure requiring low deterministic jitter, consistent frequency relationships, and multiple logic-compatible outputs. The SY89426JC uses TTL/CMOS-compatible inputs and provides PECL clock outputs. The device provides a single-chip source for 622.08 MHz and 155.52 MHz clocks. Its 622.08 MHz output is differential PECL, while the 155.52 MHz output is single-ended PECL. It also includes a reference output and supports SONET-compliant jitter performance stated as 0.01 UI in the retrieved technical data. The SY89426JC is intended for telecommunications equipment operating at SONET OC-12 and OC-3 line rates. The 622.08 MHz and 155.52 MHz outputs support clock generation in line-card, transceiver, and network-interface designs where a local oscillator must provide both high-speed and divided timing signals. Use controlled-impedance routing for the differential 622.08 MHz output and provide compliant termination and decoupling close to the device. The 28-LCC package is a leaded ceramic package, so thermal performance and assembly compatibility should be checked against the PCB footprint and manufacturing process. This page consolidates verified distributor specifications, package information, datasheet links, and design-oriented guidance for the SY89426JC clock synthesizer.
SY89426JI - 622.08MHz SONET Clock Synthesizer | Microchip
The Microchip Technology SY89426JI is a clock and frequency synthesizer IC that generates 622.08 MHz and 155.52 MHz clocks for SONET OC-12 and OC-3 systems. Its primary high-speed output is differential PECL, its 155.52 MHz output is single-ended PECL, and it accepts TTL/CMOS-compatible reference inputs. The device is packaged in a surface-mount 28-LCC J-lead package. A clock synthesizer is a timing IC that derives one or more internally regulated clock outputs from an external reference. Clock synthesizers belong to the clock and timing IC hierarchy, where they support communication links, network equipment, and test systems by distributing frequencies with controlled phase and jitter. In a SONET design, accurate clocks are essential because transmit and receive hardware must process high-speed serial data within defined timing margins. The SY89426JI provides a single-chip source for both 622.08 MHz and 155.52 MHz clock frequencies. The verified device description identifies SONET-compliant jitter performance of 0.01 UI. Differential PECL at 622.08 MHz is suited to high-speed serial links, while the single-ended PECL output at 155.52 MHz supports parallel or lower-rate clocking requirements. TTL/CMOS-compatible inputs and a reference output simplify integration with external oscillators and system clock-distribution networks. Available verified data does not specify the complete electrical limits, supply-voltage range, power dissipation, temperature range, or detailed pin assignments. Those parameters remain marked as data-needed rather than inferred from the device category. Likewise, no manufacturer datasheet URL appears in the supplied search results, so a distributor or indexed datasheet page is retained only as a source reference rather than represented as an official Microchip PDF. Typical uses include SONET optical network equipment, telecommunications line cards, high-speed clock-distribution assemblies, and instrumentation that needs related OC-12 and OC-3 clock domains. The principal design consideration is interface compatibility: downstream circuits must support differential or single-ended PECL levels, and any unused output or supply pins must be terminated exactly as directed by the complete datasheet. This product page consolidates the verified clock frequencies, logic families, SONET jitter claim, package format, source links, and engineering cautions. It also distinguishes documented functions from unspecified parameters, helping designers evaluate the SY89426JI without converting category-level assumptions into unsupported component specifications.
SY89426JY - 622.08MHz SONET Clock Synthesizer | Microchip
The Microchip Technology SY89426JY is a clock/frequency synthesizer IC engineered for SONET OC-3 and OC-12 clock generation. It accepts a 38.88MHz-to-77.76MHz reference input and produces a maximum 622.08MHz clock, with documented TTL input and PECL/TTL output interfaces. The device is packaged in a 28-pin leaded chip carrier, identified by distributors as 28-LCC (J-Lead). Its core role is to derive a high-speed, phase-aligned telecommunications clock from a lower-frequency reference while supporting high-speed digital interfaces. A clock synthesizer is a timing IC that generates, multiplies, or distributes clock signals according to a defined frequency relationship. In the broader semiconductor hierarchy, this product is a clock and timing IC, then a frequency synthesizer, and finally a SONET line-rate clock-generation component. This classification matters because telecom designs require deterministic relationships among reference, payload, and line clocks rather than a general-purpose oscillator. The SY89426JY targets the 51.84MHz, 155.52MHz, 311.04MHz, and 622.08MHz SONET domain through its supported generation function. Verified source data identifies one clock circuit, no PLL, a TTL reference input, PECL and TTL outputs, a maximum frequency of 622.08MHz, and a 28-LCC package. The absence of a PLL is a defining architectural constraint: the synthesizer relies on a supplied reference rather than a phase-locked loop. Distributor descriptions further identify the part as lead-free and intended for industrial-temperature operation, but the supplied evidence does not expose voltage limits, supply current, jitter, output levels, pin names, or complete timing tables. The device is suitable for SONET OC-3 and OC-12 transport equipment, optical-network terminals, line cards, clock-distribution modules, and test equipment that require a 622.08MHz clock. Its multiple logic interfaces allow integration where the next stage accepts PECL or TTL. Because high-speed edges and propagation delays can affect timing integrity, the PCB must provide controlled impedance, short traces, solid return paths, and clean separation between clock and data or noisy power circuitry. When designing around SY89426JY, verify every supply rail, logic threshold, decoupling value, and output termination against the manufacturer datasheet before schematic release. Do not assume generic PECL or TTL termination because device-specific output topology and board-level loading are not present in the supplied data. Differential-clock standards, such as the CML interface referenced by the retrieved datasheet result, may not be available from this part even though CML is common in related SONET devices. This page combines verified distributor specifications, source-qualified data gaps, application context, and replacement constraints. It also distinguishes a true drop-in replacement from a merely functional clock synthesizer, since same-package status, pin compatibility, electrical ranges, and lifecycle availability must all be confirmed before substitution.
Si5330B-B00205-GM - 1:4 LVDS Clock Buffer 710 MHz 24-QFN
The Skyworks Solutions Si5330B-B00205-GM is a 1:4 LVDS low-jitter, low-skew clock fanout buffer and level translator operating up to 710 MHz, housed in a 24-pin QFN with exposed pad. It accepts one single-ended or differential input and produces four differential (or eight single-ended) low-jitter LVDS outputs, making it well suited for high-performance PCB clock distribution. A clock buffer is a fanout device that takes one reference clock and produces multiple, phase-aligned copies for routing across a printed circuit board. Within the broader clock-tree hierarchy, the Si5330B sits between an upstream PLL/oscillator (frequency generation) and downstream transceivers, ASICs, FPGAs, or ADCs (clock consumption). Unlike a PLL-based clock generator, a buffer preserves the input frequency exactly and only regenerates the edges, minimizing added jitter and avoiding frequency translation artifacts. Key features include 710 MHz maximum input/output frequency, LVDS output format, 1:4 fanout, integrated input level translation (1.8 V, 2.5 V, or 3.3 V core with separate output-bank supply), and minimal crosstalk with strong supply-noise rejection. The exposed-pad QFN-24 package provides a low thermal resistance path for noise-sensitive systems. The device uses a differential LVDS output stage with internal source-terminated architecture, yielding sub-picosecond additive jitter at typical reference frequencies. Independent VDD pins for the input core and the output bank allow level translation without external circuitry, simplifying mixed-voltage designs. Typical applications include high-speed ADC/DAC sampling clocks, FPGA logic clock distribution, telecom/datacom line-card reference clocks, and PCI Express or serializer/deserializer reference fanout. Its low jitter makes it ideal for any noise-sensitive clock domain that needs a clean, multi-drop copy of a single reference. When designing with the Si5330B, follow the datasheet recommended termination for both LVDS inputs and outputs (typically 100 ohm differential) and decouple each VDD pin with a 0.1 uF ceramic placed as close to the IC as possible. The exposed pad must be soldered to a continuous ground plane for both thermal dissipation and controlled impedance. The custom B00205 ordering code defines the factory-set input/output configuration, so verify the variant matches your board's required direction. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on any single distributor listing.
Si5330B-B00205-GMR - 1:4 LVDS Clock Buffer 710MHz | Skyworks
The Skyworks Solutions (formerly Silicon Labs) Si5330B-B00205-GMR is a 1:4 LVDS low-jitter, low-skew fanout clock buffer and level translator housed in a 24-pin QFN-EP (4x4 mm) package. It accepts a single input clock and produces four differential LVDS outputs (or eight single-ended outputs) at frequencies from 5 MHz to 710 MHz, with guaranteed low additive jitter, low skew, and low propagation delay variability. A clock fanout buffer (also called a clock driver or clock distributor) is a semiconductor device that receives one input clock reference and replicates it onto multiple low-skew output clocks. Clock buffers sit in the timing-distribution hierarchy between an upstream PLL/oscillator and downstream loads such as FPGAs, ASICs, ADCs, DACs, and SerDes transceivers. By regenerating edges locally, they isolate the source from load-induced jitter and provide the deterministic phase alignment that high-speed digital links require. Differentiating features of the Si5330B family include a glitchless switching mux for redundant clocking applications, minimal cross-talk between outputs, and superior supply noise rejection that simplifies low-jitter distribution in noisy PCB environments. The device uses advanced CMOS technology, supports independent core and output-bank supply pins for integrated level translation without external circuitry, and accepts CML, HCSL, LVDS, or LVPECL inputs while driving LVDS outputs. The integrated input terminations remove the need for external resistor networks. From an architectural perspective, the Si5330B employs a precision differential input receiver followed by a low-jitter PLL-free fanout tree. Because the device does not synthesize new frequencies (it simply distributes and level-translates), its additive jitter contribution is small enough to preserve overall system margins even at 710 MHz operation. The output drivers are LVDS-compatible, providing the 350 mV swing required by ANSI/TIA/EIA-644 receivers. Typical additive jitter is in the sub-picosecond RMS range. Typical applications include clock distribution in communications infrastructure, redundant clocking for high-availability servers and storage, level translation between PECL/LVDS domains, and PCB-level fanout for FPGA, ASIC, and processor clock inputs. The wide 5-710 MHz operating range covers virtually all common telecom, networking, and computing reference frequencies. When designing with the Si5330B, designers should size the output-bank and core supply decoupling per Skyworks' reference layout and observe the LVDS receiver termination requirements (typically 100 ohm differential). The exposed pad must be soldered to a low-impedance ground plane for thermal and electrical performance. This page synthesizes distributor pricing, drop-in alternatives from the same Skyworks Si5330 family, and practical PCB layout notes not consolidated in the manufacturer datasheet.
Si5341B-B04862-GM - 10-Output Ultra-Low Jitter Clock Generator | Skyworks
The Skyworks Solutions Si5341B-B04862-GM is a pre-programmed, custom-configured variant of the Si5341B ultra-low jitter any-frequency clock generator family. The device delivers up to 10 differential or single-ended clock outputs at any frequency up to 750 MHz (with <350 MHz jitter-optimized outputs available), in a 64-pin QFN (9x9 mm) package with exposed pad for thermal dissipation. The on-board MultiSynth technology generates independent fractional-N synthesizers per output, allowing non-integer frequency relationships that cannot be realized by integer-N PLLs. A clock generator (also called a frequency synthesizer or PLL-based timing IC) is a mixed-signal integrated circuit that takes one or more low-jitter reference inputs (typically a crystal or LVDS/CMOS reference) and produces one or more precise output frequencies locked to that reference. Within the broader hierarchy it sits as: clock generator -> PLL/VCXO -> timing IC -> power management & signal chain. Unlike a simple clock buffer, a clock generator can translate frequency (e.g., 25 MHz in to 156.25 MHz out), translate format (LVCMOS to LVDS/LVPECL/HCSL/CML), and re-multiply reference, all while adding typically <100 fs RMS phase jitter to the signal. Key features of this Si5341B configuration include typical RMS phase jitter of 50 fs (12 kHz-20 MHz, per the Si5341/40 family datasheet), integrated LDOs that accept a single 1.8V/2.5V/3.3V supply, two differential reference inputs with automatic or manual switching, programmable output slew rate and amplitude, and per-output enable / glitchless start/stop. The device is configured via I2C/SPI and the Skyworks ClockBuilder Pro software. Architecturally the Si5341B combines a low-noise integer-N PLL locking to the reference, a MultiSynth fractional-N divider tree per output, and an output-driver block supporting LVCMOS, LVDS, LVPECL, HCSL, and CML. The MultiSynth architecture eliminates the need for bulky external VCXOs in most applications because any fractional multiplication ratio is supported without integer-boundary spurs. Typical applications include 10G/25G/100G Ethernet PHY clocking, OTN/WDM optical transport line cards, FPGA reference clock trees, broadcast video reference generation, JESD204B/C ADC and DAC sampling clocks, and PCIe Gen3/4/5 clock fan-out. Each output can be set independently so a single Si5341B-B04862-GM can replace multiple crystal oscillators on a high-density PCB. When designing with this part, follow the reference schematic in the Si5341/40 Family Reference Manual exactly. Place the 0.1 µF + 1 µF supply decoupling pair directly at the AVDD/VDD pins, route the reference input traces as 50 Ω controlled-impedance differential pairs, and provide a continuous ground plane beneath the exposed pad with at least 12 thermal vias to the internal layer. This page synthesizes Skyworks datasheet specifications, current distributor pricing as of 2026-10-10, drop-in replacement options within the Si5341/Si5340 family, and practical design notes that complement (but do not replace) the manufacturer documentation.
THS788PFD - 200 MHz Quad-Channel 13 ps TMU | Texas Instruments
The Texas Instruments THS788PFD is a four-channel time measurement unit (TMU) using time-to-digital converter architecture, with 8 ps single-shot accuracy, 13 ps resolution derived from an external 200 MHz controller clock, and a measurement result range of 7 s in a 100-pin HTQFP package. It supports a 200 MHz event-input rate and provides LVDS-compatible event inputs, an LVDS result interface, four event channels, and a synchronization channel. A time measurement unit is a specialized clock-and-timing semiconductor that converts the elapsed time between events into a digital result. The THS788 belongs to the TMU hierarchy, where its TDC architecture combines fine timing resolution with high-rate event capture. This makes it suitable for systems requiring precise timing rather than ordinary counting, including synchronized instrumentation, pulsed systems, test equipment, and communications or industrial timing subsystems. The key performance feature is 8 ps single-shot accuracy, supported by a 13 ps least-significant-bit resolution. The external controller clock operates at 200 MHz, and the event input rate can reach 200 MHz. The 7 s result range supports substantially longer measurement intervals than the 13 ps conversion resolution alone would imply, depending on the configured measurement sequence and system implementation. LVDS-compatible interfaces provide high-speed, noise-resistant signaling for demanding board environments. Technically, the THS788 uses a fast TDC architecture to perform time measurements across four event channels. Its inputs are designed for LVCMOS or LVDS signaling, while the result output is identified as LVDS. The synchronized architecture and dedicated sync channel make the device suitable for multi-event acquisition where repeatable timing relationships matter. The stated low temperature coefficient of 0.1 ps/°C indicates attention to timing stability over temperature. Typical applications include high-speed test and measurement systems, pulsed-signal analysis, synchronization of multiple timing events, industrial automation requiring deterministic event capture, and communications equipment that must measure narrow time intervals. The device can also support scientific instrumentation where event timing accuracy directly affects the quality of the collected result. Designers should treat the external 200 MHz clock, LVDS-compatible input routing, result interface, decoupling, and high-speed return paths as an integrated signal-integrity problem. Input timing, trace length, termination, and controller configuration must be evaluated together because the 13 ps resolution does not guarantee end-to-end system accuracy without clean clocking, controlled stimulus, and correct interface implementation. This page combines the verified manufacturer and distributor information for the THS788PFD with practical selection guidance, application analysis, pricing references, and an honest assessment of available drop-in alternatives.
THS789PFD - Quad-Channel 200MHz Time Measurement IC | TI
Texas Instruments THS789PFD is a quad-channel time measurement unit (TMU) with a 200 MHz measurement clock, one output, and a 100-pin HTQFP package measuring 14 mm by 14 mm. The device is listed for commercial-grade operation from 0 °C to 70 °C and is supplied in a tray. Its verified product identity also includes an exposed thermal pad and surface-mount construction. A time measurement unit is a specialized clock-and-timing semiconductor that measures elapsed time by comparing reference events. A multi-channel TMU extends this function across several independent measurement paths, making it useful when a system must acquire timing relationships, delays, pulse widths, or event intervals without implementing each measurement function as discrete logic. The THS789 therefore belongs to the clock-and-timing IC category and the broader application-specific timing semiconductor hierarchy. The principal verified specifications are four measurement channels, a 200 MHz timing reference, and one output. The 200 MHz reference corresponds to a 5 ns reference period, while the quad-channel architecture permits parallel timing observations. The 100-pin HTQFP package provides numerous external connections for timing inputs, control, power, and outputs, while the exposed pad supports heat transfer from the device to the PCB. The THS789PFD is specifically identified as a Time Measurement IC and is marketed by DigiKey under the Application Specific Clock/Timing classification. This distinguishes it from conventional general-purpose timers by emphasizing precision event-interval measurement across four channels. The exact input voltage range, minimum measurable interval, timing accuracy, propagation delay, output characteristics, and power specifications are not included in the supplied verified excerpts and should be taken from the complete manufacturer datasheet before design release. Typical engineering uses include industrial automation equipment, communications timing analysis, instrumentation, automated test systems, and embedded systems that compare multiple event arrivals. The 100-pin package and exposed pad make careful PCB layout, grounding, and thermal management important. In multi-channel systems, signal integrity at the timing inputs can materially affect measurement consistency, so controlled impedance, short return paths, and clean reference distribution should be prioritized. A principal design trade-off is package size versus channel density: the 14 mm by 14 mm HTQFP offers extensive connectivity for four timing channels but requires more PCB area than a compact mixed-signal package. Engineers should also confirm the complete electrical limits and interface timing before substituting another device or extending the operating temperature beyond the verified 0 °C to 70 °C range. This product record combines verified manufacturer and distributor identity, package and ordering information, commercial availability, and explicit engineering guidance for evaluating the THS789PFD. It also distinguishes confirmed facts from parameters that still require review in the full Texas Instruments datasheet, supporting faster procurement and design planning without treating unverified specifications as guaranteed.
TMC2340AH5C1 - 16-Bit DDS Synthesizer | onsemi | Signal Generation
The onsemi TMC2340AH5C1 is a dual 16-bit direct digital synthesis IC with a 50 Msps maximum sampling rate, 32-bit phase-increment tuning, and a 15-bit user-programmed amplitude value. The device is supplied in a large PGA-style ceramic package identified by the source data as 121-BPGA or PPGA120. It generates matched quadrature sine and cosine waveforms in 16-bit offset-binary DAC-compatible format. A direct digital synthesizer, or DDS, is a clocked waveform-generation architecture in which phase and amplitude are represented numerically before conversion into an analog waveform. DDS belongs to the clock-generation and frequency-synthesis hierarchy, alongside PLLs and other programmable waveform sources. It provides direct control of phase increment and amplitude, allowing frequency and level changes to be represented digitally instead of through analog tuning networks. The TMC2340A performs waveform synthesis, modulation, and demodulation when supplied with a TTL clock and user-selected values. Its dual architecture produces quadrature-matched 16-bit sine and cosine outputs, while the documented 15-bit amplitude control provides a separate amplitude adjustment parameter. Output data uses 16-bit offset binary format, making the device suitable for systems requiring deterministic digital waveform data before DAC conversion. According to the manufacturer-hosted TMC2340A datasheet, the device accepts a TTL clock signal and generates the matched sine and cosine pair automatically. The available product listing reports a 40 MHz operating or clock-related figure alongside a 50 Msps sampling capability, while the phase increment is 32 bits and amplitude control is 15 bits. These figures should be matched to the specific clock, output interface, and system timing requirements during design review. Typical uses include precision signal generators, communication waveform sources, modulation and demodulation test equipment, and digital-to-analog converter front ends. Because the source describes DAC-compatible digital outputs, the component can also serve as the waveform engine in laboratory, industrial, and communications systems where repeatable phase and amplitude control is required. The principal design consideration is package and data-interface integration. The available listings conflict between a 121-BPGA description and a 120-terminal PPGA description, so engineers must verify the physical pad layout, pin numbering, and board footprint against the original manufacturer documentation before layout or replacement. This page consolidates the verified distributor and manufacturer-source details, explicitly identifies missing technical and commercial information, and separates known device capabilities from assumptions. That distinction is particularly important for this uncommon PGA-packaged DDS device, where package naming and pin documentation materially affect replacement feasibility.
TMC57750PM - RS-170 Timer Control IC | Texas Instruments
The Texas Instruments TMC57750PM is a 1/4-inch RS-170 timer control integrated circuit with one output, supplied in a 64-LQFP 10 x 10 mm package. It provides timing functions for compatible camera and imaging circuits, including RS-170 timing behavior, EIA-170 operation, and electronic-shutter-related control functions. The verified distributor listing identifies the device as a timer control IC with one output and a 64-LQFP package. A timer control IC is a specialized clock-and-timing semiconductor used to coordinate timing signals between functional blocks in a larger circuit. Within the broader hierarchy of application-specific clock/timing ICs, the TMC57750PM translates timing requirements into control signals for compatible video or imaging systems. Its dedicated function allows it to sit alongside sensors, image-processing electronics, and downstream display or transmission circuitry rather than operating as a general-purpose clock generator. The available verified information identifies the TMC57750PM as a 1/4-inch RS-170 timer. Associated search results describe EIA-170 timing operation, fixed electronic-shutter options, random shutter-mode, and flicker-compensation mode. These features indicate that the device is intended for timing-sensitive RS-170 systems where shutter behavior and synchronization are important. Additional detailed electrical limits, timing tolerances, supply-current values, and output characteristics are not supplied in the verified excerpts and must be confirmed in the manufacturer datasheet. The 64-LQFP package provides a substantial pin count for separating timer, control, shutter, and interface functions. Its 10 x 10 mm footprint is suitable for compact camera electronics while offering more external connections than a small SOIC or QFN package. Package details, pin names, and exact routing requirements should be taken from the official Texas Instruments documentation before PCB release. Typical application areas include RS-170 video timing, electronic-shutter control, fixed-shutter systems, random shutter-mode systems, and flicker-compensated imaging circuits. These applications depend on correct timing polarity, signal mapping, and board-level decoupling. Because the provided evidence does not establish the complete pinout or electrical envelope, engineers should verify all values and connections in the manufacturer datasheet. This page consolidates the verified distributor classification, RS-170 application context, package information, and source links into a procurement-oriented component record. It also distinguishes confirmed facts from specifications requiring datasheet confirmation, avoiding unsupported substitutions or invented performance claims.
TPS3430WQDRCRQ1 - Automotive Window Watchdog | Texas Instruments
Texas Instruments TPS3430WQDRCRQ1 is an automotive window watchdog timer with programmable watchdog window and programmable watchdog reset delay, supplied in a 10-VSON package measuring 3.00 mm by 3.00 mm. The device is designed to supervise automotive electronic systems by detecting both late service activity and activity outside a configured timing window. Its operating-temperature range is -40°C to +125°C, and the package uses wettable flanks for optical inspection. A window watchdog timer is a specialized form of watchdog timer that requires the monitored system to toggle its service signal within both an upper and lower timing boundary. Unlike a conventional timeout-only watchdog, a window watchdog can identify both a frozen system and operation that occurs too quickly. This makes it valuable in automotive controllers where correct task scheduling and deterministic control-loop activity must be verified. The TPS3430-Q1 family provides programmable watchdog timing and programmable reset delay. Its SET pins can disable the watchdog during development or power-on sequences, preventing unintended timeout events before the monitored application is ready. The small 3.00 mm × 3.00 mm 10-VSON package supports compact automotive control modules while wettable flanks improve assembly inspection. The TPS3430WQDRCRQ1 belongs to the clock and timing IC hierarchy as a supervisory timing device. Its watchdog window mechanism operates alongside the host processor rather than replacing it: the host must service the watchdog within the permitted interval, while the timer supplies a fault indication when service is missing, too early, or too late. The programmable reset delay adds a controlled response interval after a watchdog event. Typical uses include automotive body controllers, motor-control modules, battery-management systems, electronic control units, and other safety-relevant embedded platforms. Its -40°C to +125°C rating and automotive-oriented ordering designation make it suitable for designs operating across extended industrial temperatures. For automotive production designs, engineers should also verify the complete device qualification and documentation package rather than relying only on the ordering code. PCB implementation should place the watchdog and its associated bypass capacitor close to the host controller and power-entry circuitry. Keep the monitored service signal away from noisy power and switching-node routing, and validate both reset polarity and timeout behavior in the complete firmware state machine. The watchdog must remain disabled only during controlled startup or programming intervals. This page consolidates the verified manufacturer and distributor information, distinguishes the automotive window watchdog function from ordinary timeout devices, and provides practical selection, comparison, and design guidance. Exact electrical limits, threshold ranges, pin functions, qualification details, and volume pricing should be confirmed against the current manufacturer documentation before design release.
TS555CD - 2.7MHz CMOS Timer | STMicroelectronics | SOIC-8
STMicroelectronics TS555CD is a single CMOS 555-type timer/oscillator operating from 2 V to 16 V, with a maximum frequency of 2.7 MHz and typical supply current of 100 µA at VCC = 5 V. The device is supplied in an 8-pin SOIC package and supports both astable and monostable timing. Its low power consumption and higher operating frequency distinguish it from the conventional bipolar NE555. A 555 timer is an analog timing integrated circuit that combines resistive timing, a voltage comparator, a flip-flop, and a high-current output stage. Within the broader semiconductor hierarchy, the TS555CD is a clock and timing IC, then a programmable timer and oscillator, and finally a general-purpose timing component used in industrial control, pulse generation, delay circuits, and signal processing. The TS555 family provides low typical supply current of 100 µA at 5 V, while the manufacturer product page lists 110 µA at VCC = 5 V. Its maximum astable frequency is 2.7 MHz, compared with 0.1 MHz for the conventional NE555. This frequency capability makes the TS555CD suitable for compact oscillator and pulse-generation circuits that require faster timing than the classic bipolar implementation. STMicroelectronics describes the TS555 as pin-to-pin and functionally compatible with the bipolar NE555. It can operate in astable mode as a free-running oscillator or in monostable mode as a one-shot pulse generator. The output stage supports high output current, while reduced supply-current spikes during output transitions help limit disturbance on sensitive power rails. Typical uses include industrial delay circuits, sensor activation timers, low-power oscillators, LED flashers, control pulse generators, and embedded system timing. Because the TS555CD is listed as obsolete by a distributor record, engineers should confirm lifecycle availability with authorized distributors or qualify an alternative before new production releases. Designers should not assume that every 555-family device is interchangeable at high frequency or across the complete supply range. Check pinout, output polarity, timing tolerance, maximum frequency, supply voltage, output-current capability, and package dimensions against the specific replacement. Decoupling capacitors should be placed close to the supply pins, and timing components should be positioned to minimize switching-node coupling. This page consolidates verified manufacturer and distributor specifications, lifecycle information, practical replacement guidance, and application-focused engineering notes. It provides a concise purchasing and design reference while clearly separating confirmed data from parameters that still require manufacturer confirmation.