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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.
TS555CN - 2.7MHz Low-Power CMOS Timer | STMicroelectronics
The STMicroelectronics TS555CN is a low-power, single CMOS timer with a maximum astable frequency of 2.7 MHz, a typical supply current of 100 µA at 5 V, and an operating supply range up to 18 V, housed in an 8-pin DIP package. It provides the familiar 555 timer functions in astable and monostable configurations while offering pin-to-pin and functional compatibility with the bipolar NE555. A 555 timer is a programmable timing IC that combines a resistor, capacitor, and internal threshold comparator into a compact oscillator or one-shot pulse generator. The TS555CN belongs to the CMOS timer, oscillator, and clock-and-timing hierarchy: it can generate continuous periodic waveforms in astable mode or produce a timed output pulse in monostable mode. Its CMOS implementation is especially useful in low-power and higher-frequency circuits where lower supply current than a conventional bipolar NE555 is valuable. Key features include very low typical supply current, a maximum astable frequency of 2.7 MHz, wide operating voltage support to 18 V, high input impedance, and output compatibility with TTL, CMOS, and logic families. According to the STMicroelectronics manufacturer datasheet, typical supply current is 110 µA at 5 V and 90 µA at 3 V, with reduced current spikes during output transitions. These characteristics make the device practical for portable timing, pulse generation, debouncing, and periodic-control applications. Internally, the TS555CN uses CMOS circuitry to implement the comparator, flip-flop, discharge transistor, and timing-control functions of a standard 555 timer. In astable operation, two external resistors and one capacitor establish the oscillation period; in monostable operation, one resistor and one capacitor set the pulse width. The external timing elements determine practical accuracy, while the timer provides repeatable thresholding and state control. Typical uses include low-power delay circuits, oscillator clocks, LED flashers, pulse generators, debounce networks, and control timing in embedded equipment. The TS555CN can also replace a standard NE555 where the circuit permits CMOS supply current and operating-voltage differences. Before substitution, verify trigger-level, output-drive, timing-tolerance, and maximum-frequency requirements against the actual design. For PCB layout, keep the timing capacitor and resistor leads short, connect the decoupling capacitor close to VCC and GND, and avoid long traces around high-impedance threshold and control pins. Because the DIP package has exposed through-hole leads, mechanical spacing and soldering cleanliness should also be considered. This page combines manufacturer specifications, verified distributor information, replacement guidance, and practical design notes for engineering selection.
TS555ID - 2.7MHz Low-Power CMOS Timer | STMicroelectronics
The STMicroelectronics TS555ID is a single CMOS 555-type timer and oscillator with a 2.7MHz maximum frequency, low typical supply current, and an 8-pin SOIC package. It operates from 2 V to 18 V and is designed for both astable and monostable timing circuits. According to the STMicroelectronics product page, typical supply current is 110 µA at VCC = 5 V, compared with 3 mA for the bipolar NE555. A CMOS timer is a clock-and-timing semiconductor that generates a time-delayed output or an adjustable oscillation when combined with passive resistors and capacitors. The TS555 belongs to the 555 timer family, which combines a comparator, flip-flop, discharge transistor, and voltage reference in one integrated circuit. This integration allows a timer or oscillator to be implemented without separate logic gates, while retaining the familiar resistance-and-capacitance timing method. The TS555ID provides a maximum astable frequency of 2.7 MHz, substantially higher than the 0.1 MHz maximum cited for the NE555 in the supplied manufacturer data. Its CMOS implementation also reduces supply-current spikes during output transitions. These characteristics make the device useful in low-power pulse generation, delay circuits, waveform generation, debounce timing, and embedded control applications where accurate timing and low quiescent consumption are important. The TS555 is pin-to-pin and functionally compatible with the bipolar NE555 according to the supplied datasheet description. Its wide 2 V to 18 V supply range supports legacy 5 V systems as well as higher-voltage industrial and embedded rails. The exact trigger and threshold timing tolerances, output-current limits, temperature range, and absolute maximum ratings are not present in the provided data and therefore require confirmation in the manufacturer datasheet before final design release. Typical uses include RC astable oscillators, retriggerable and non-retriggerable monostable multivibrators, pulse-width timing, debounce networks, and low-frequency clock generation. In an astable circuit, external resistors and a capacitor set the operating frequency; in monostable operation, the same timing principle produces a controlled output pulse after a trigger event. Designers should use the external timing-component tolerances as part of the total timing error and verify output-drive current against the selected load. Decoupling should be placed close to the supply pins, and the timing capacitor and resistors should be positioned to minimize leakage, contamination, and parasitic capacitance. PCB cleanliness is particularly important because contamination can change effective resistance and disturb oscillator frequency. This page consolidates manufacturer specifications, verified distributor listings, package details, practical design guidance, and explicitly qualified replacement information. It is intended to support engineering selection while separating verified values from parameters that still require confirmation from the full STMicroelectronics datasheet.
TS556CD - Dual CMOS Timer, 2.7MHz, 14-SOIC | STMicroelectronics
The STMicroelectronics TS556CD is a low-power dual CMOS 555-type timer and oscillator with a maximum frequency of 2.7 MHz, a 2 V to 16 V supply range, and a 14-pin SOIC package. The device combines two independent timer sections, low typical supply current, and pin-to-pin and functional compatibility with the bipolar NE556, making it suitable for precision timing, pulse generation, delay, and oscillator circuits. A 555-type timer is an analog timing integrated circuit that compares an externally controlled voltage with threshold and trigger levels. In monostable mode, it produces one timed output pulse; in astable mode, it oscillates continuously when configured with external resistors and capacitors. The TS556CD uses CMOS circuitry to reduce power consumption while retaining the familiar dual-timer architecture. Key verified features include a maximum astable frequency of 2.7 MHz, low-power operation, and supply current listed in the source data at approximately 130 µA in one distributor summary, while the manufacturer-family description specifies 220 µA typical at VCC = 5 V for TS556. The discrepancy reflects different device variants or source summaries; application designs should verify the exact datasheet value for the ordered part. The 14-SOIC package is suitable for conventional PCB assembly and through-hole-compatible external connections. The TS556CD is useful in pulse-width generation, delay circuits, waveform generation, LED flashing, industrial control timing, low-power signal generation, and embedded control systems. Its dual sections allow two timers in one package when board area is constrained. Because timing accuracy depends on resistor tolerances, capacitor stability, supply variation, and output loading, those components should be selected for the target frequency and temperature range. The principal design consideration is confirming output drive, supply voltage, timing limits, and pin-level compatibility with the surrounding circuit. The manufacturer describes the family as functionally and pin-to-pin compatible with the bipolar NE556, but load conditions and supply-specific timing behavior still require review before substitution. The TS556CD is listed as obsolete by one distributor source, so procurement should confirm lifecycle status and availability before committing to a production design. This page combines the verified TS556CD specifications, sourcing information, lifecycle observations, and application guidance to support design triage. It also highlights why a same-package timer replacement must be checked for frequency, voltage, timing, and output-load compatibility rather than selected by footprint alone.
TS556CN - Dual 2.7MHz CMOS Timer | STMicroelectronics
The STMicroelectronics TS556CN is a dual low-power CMOS timer with two independent 555-compatible timing sections, a maximum astable frequency of 2.7 MHz, and a 14-DIP package. Its verified supply-voltage range is 2 V to 16 V, while one secondary result describes the family operating to 18 V; the exact maximum for this orderable device must therefore be confirmed from its datasheet before use. The TS556CN provides 180 µA typical supply current at 3 V and is designed for accurate monostable and astable operation. A CMOS timer is a programmable time-delay and oscillator integrated circuit. It belongs to the timer/oscillator category, within clock and timing ICs and broader semiconductor devices. Each timer section uses external resistors and capacitors to set delay or oscillation behavior, making this device useful where conventional 555-type timing, pulse generation, delay, and repetitive switching are required without a microcontroller. Key verified attributes include dual-timer construction, operation from 2 V to 16 V, a high maximum astable frequency of 2.7 MHz, and pin-to-pin and functional compatibility with bipolar NE556 devices. Reduced supply-current spikes during output transitions can permit lower decoupling capacitance than a conventional bipolar implementation. The stated 180 µA typical current at 3 V supports battery-conscious designs, although load and switching conditions must be checked against the datasheet. The TS556CN uses CMOS circuitry to combine low quiescent consumption with higher timer frequency than the bipolar NE556 comparison cited in the search data. That comparison reports 2.7 MHz maximum frequency for TS556 versus 0.1 MHz for NE556. However, actual operating frequency depends on timing resistors, capacitors, propagation delays, output loading, and supply voltage, so high-frequency layouts require short traces and careful grounding. Typical uses include LED and lamp flashers, pulse generators, delay stages, debounce or retriggerable timing networks, simple oscillators, industrial control timers, and low-power instrumentation. The 14-DIP through-hole package favors prototypes, educational designs, repairable assemblies, and human-built electronics where a socketed or perforated-board implementation is practical. Design with the two timer sections independently unless datasheet pin behavior explicitly permits shared connections. Place timing components close to their associated pins, bypass the supply near the device, and account for output-current limits and threshold tolerances. Because the web evidence provides conflicting voltage-range wording, use the 2 V to 16 V range for this listing and verify absolute maximum and operating limits before releasing production hardware. This page combines verified distributor and datasheet findings, package-aware replacement analysis, and practical timer-circuit guidance. It also distinguishes documented TS556CN data from specifications that were not supplied, avoiding unsupported claims about pricing, lifecycle, compliance, or exact pin assignments.
TS556ID - Dual 2.7MHz CMOS Timer | STMicroelectronics
The STMicroelectronics TS556ID is a dual CMOS 555-type timer and oscillator with two independent timing sections, operation from 2 V to 16 V, a maximum astable frequency of 2.7 MHz, and typical supply current of 220 µA at 5 V. It is supplied in a 14-pin SOIC package. The TS556ID combines 555 timer compatibility with CMOS power efficiency and higher timing frequency than the traditional bipolar NE556. A 555-type timer is a programmable clock and timing semiconductor that can operate as a monostable one-shot or astable oscillator. In system hierarchy, the TS556ID belongs to clock and timing ICs, timer ICs, oscillators, and semiconductors. Each internal timer provides resistive and capacitive timing inputs, trigger and reset controls, and an output stage. Two independent sections allow one circuit to generate two events, delays, tones, or periodic waveforms. The verified data identifies the TS556 as a pin-to-pin and functionally compatible bipolar NE556 design, while reducing typical supply current to 220 µA at a 5 V supply. Another source lists 180 µA typical at 3 V. Its 2.7 MHz maximum astable frequency allows shorter timing periods and higher-frequency waveform generation than a 0.1 MHz NE556, subject to the datasheet's timing limits, component tolerances, and output-drive conditions. The TS556ID supports monostable and astable operating modes. In monostable service, an external trigger produces a timed output pulse whose duration is determined primarily by external resistance and capacitance. In astable service, external timing components charge and discharge an internal node, producing continuous oscillation. Engineers should calculate the timing values from the manufacturer datasheet, include realistic resistor and capacitor tolerances, and verify output rise and fall behavior in the intended load. Typical uses include low-power pulse generation, delayed actuator triggering, LED and indicator flashing, audible tones, small signal-clock generation, industrial control timing, and embedded system timing support. The dual architecture is especially useful when two related but nonsynchronous events are needed. Compared with a NE556, the principal benefits are lower typical consumption and a substantially higher maximum astable frequency; NE556 compatibility does not mean every electrical limit is identical. Design with the 2 V to 16 V supply range in mind, especially the output behavior at low supply voltage. Keep the reset and trigger paths free of unwanted noise, select timing-component tolerances for the required frequency accuracy, and provide the bypass and output-loading conditions required by the datasheet. Because timing accuracy depends on real component values and parasitics, breadboard validation is advisable for high-frequency or precision intervals. This page combines verified manufacturer and distributor information, practical timing guidance, and a conservative assessment of drop-in replacements. It distinguishes documented electrical facts from parameters that require datasheet confirmation, helping engineers locate the TS556ID datasheet, evaluate purchasing options, and decide whether a same-package substitute is suitable for an existing PCB.
VSC7223XJV - 16 Gbps Quad Retimer/Redriver | Microchip
Microchip Technology VSC7223XJV is a four-channel multirate retimer/redriver that supports data rates up to 16 Gbps in a 48-QFN package measuring 5 mm by 9 mm. It combines input equalization, clock and data recovery, and output de-emphasis in one device. A multirate retimer/redriver is a specialized high-speed interface IC used within the clock and timing hierarchy of a data-processing system. It receives a degraded high-speed signal, recovers its timing and data, applies channel compensation, and then redrives the signal to improve system margin across cables, printed circuit board traces, backplanes, and other copper media. The device provides four independent high-speed channels and supports operation to 16 Gbps. Its input equalization compensates for frequency-dependent loss in FR-4 printed circuit board traces and copper cabling. Clock and data recovery removes timing distortion, while output de-emphasis helps control signal integrity in lossy channels and improve interoperability with downstream receivers. According to the manufacturer information, VSC7223 is intended to increase system margin and extend media-driving distance. The documented examples include equalization of more than 65 inches of FR-4 at 10 Gbps and more than 15 meters of 24 AWG SFP+ direct-attach copper cable at 10 Gbps. These figures describe the specified application environment and should be validated in the final system layout, connector, and enclosure. Typical uses include 10G and 16G Ethernet copper links, data-center equipment, telecommunications infrastructure, server connectivity, test equipment, and other high-speed backplane or cable interfaces. The industrial temperature grade and no-lead 48-terminal package support applications where robust environmental performance and compact surface-mount assembly are required. When designing around VSC7223XJV, preserve the controlled-impedance topology and reference-plane continuity of high-speed differential pairs. Place bypass capacitors close to supply pins, keep return paths continuous, and verify channel loss, insertion loss, crosstalk, and connector behavior with channel simulation and eye measurements before production. This product record combines verified manufacturer and distributor information with practical engineering guidance, package and interface details, sourcing data, and an explicit assessment of available drop-in replacements. No compatible substitute is listed unless its package, pin compatibility, and electrical proximity can be independently verified.
ZL30772LFG7 - Dual-Channel IEEE 1588/SyncE Packet Clock Synchronizer | Microchip
The Microchip ZL30772LFG7 is a dual-channel packet clock network synchronizer IC integrating an IEEE 1588-2008 Precision Time Protocol (PTP) software stack with hardware-assisted synchronization, designed for Ethernet, SONET/SDH, and wireless base station timing applications. The device operates with two independent timing channels, supports a maximum output frequency of 1.045 GHz, and provides 2 differential output channels in an 80-LGA (11x11 mm) surface-mount package. It implements Microchip's miTimePLL timing technology, which combines digital PLL architecture with adaptive clock synthesis for IEEE 1588 and Synchronous Ethernet (SyncE) packet-based synchronization. An IEEE 1588 packet clock network synchronizer is a specialized timing IC that recovers frequency and phase from packet networks (using PTP messages or SyncE ESMC messaging) and generates ultra-stable reference clocks for downstream PHYs, framer/mapper devices, and DSP processors. It sits in the timing hierarchy as a network-side timing source, downstream of a central office primary reference and upstream of line-card transceivers. ZL30772LFG7 sits higher in the value chain than standalone PLL clock generators such as CDCE62005 or DSPLL devices because it adds software-managed PTP-aware servo control on top of the frequency synthesis. Key features include dual independent timing channels with adaptive DPLL bandwidth, sub-100 ns holdover accuracy, hardware-accelerated PTP timestamp processing, support for SyncE ESMC SSM/QL messaging, programmable output formats (LVCMOS, LVDS, HCSL differential outputs), and a SPI/I2C host interface for stack configuration. The integrated PTP stack supports ordinary, boundary, transparent, and slave-only clock modes per IEEE 1588-2008. Output jitter performance targets 1 ps RMS (12 kHz to 20 MHz band) when locked to a GPS or SyncE reference, suitable for LTE and 5G base station phase-stability requirements. The device uses a third-generation miTimePLL core with digital filter architecture that achieves sub-ppb (parts-per-billion) frequency accuracy in locked mode. Its holdover algorithm retains accurate timing during upstream reference loss by steering the internal DCO (digitally controlled oscillator), maintaining frequency drift below 0.01 ppb for short holdover intervals. The on-chip PTP engine handles L2/L3 packet timestamping, servo filtering, and master/slave message exchange, offloading the host processor. Typical applications include IEEE 1588 grandmaster and slave clocks for 4G LTE and 5G NR base stations, SyncE equipment for carrier Ethernet, SONET/SDH demarcation units, and packet-based backhaul timing for small cells and macro cells. The wide frequency coverage (1 Hz to 1.045 GHz) also supports non-telecom uses such as instrumentation synchronization. When designing with this device, allocate dedicated board space for the 80-LGA thermal pad and follow Microchip's reference layout for the analog supply rails; noise coupling from switching converters directly degrades jitter performance. Verify the SPI/I2C firmware stack compatibility with your host RTOS, as the embedded PTP stack requires Microchip-supplied firmware images. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet for engineers evaluating the ZL30772LFG7.