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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.