TS555ID - 2.7MHz Low-Power CMOS Timer | STMicroelectronics
MPN: TS555ID ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TS555ID Overview
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.
Drop-in alternatives for TS555ID — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TS555ID (same form factor and footprint) — differing in Mounting Type, Package, Timer Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TS555CDT
✅ Drop-In📋 Reference alternative (not in catalog)
TS555IDT
✅ Drop-In📋 Reference alternative (not in catalog)
LMC555CM/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
TS555ID Specifications
| Timer Type | 555 Type, Single Timer/Oscillator |
| Technology | CMOS |
| Operating Modes | Astable and Monostable |
| Maximum Astable Frequency | 2.7 MHz |
| Supply Voltage Range | 2 V to 18 V |
| Typical Supply Current | 110 µA at VCC = 5 V |
| Alternate Typical Supply Current | 100 µA |
| Package | 8-pin SOIC |
| Mounting Type | Surface Mount |
| Pin-to-Pin Compatibility | Compatible with bipolar NE555 |
| Supply Current Spikes | Reduced during output transitions |
TS555ID 8-pin soic Pin Configuration Guide
Pin configuration for TS555ID (8-pin soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TS555ID.
Refer to the datasheet for full pin configuration.
Typical Applications
TS555ID is suitable for 6 applications: Low-Power RC Astable Oscillator, Monostable Pulse and Delay Circuit, Debounce and Retrigger Timing, Embedded Clock and Tone Generation, Industrial Pulse and Watchdog Timing, Portable Sensor and Control Module.
Low-Power RC Astable Oscillator
The TS555ID fits low-power oscillator circuits because its typical supply current is 110 µA at 5 V and its maximum astable frequency is 2.7 MHz. External resistors and a capacitor establish the oscillation period, allowing the timer to generate continuous square-wave timing signals without a microcontroller. The CMOS architecture is useful when battery or standby-current budgets limit available power. Engineers must select resistor and capacitor tolerances according to the required frequency accuracy, because parasitic board capacitance and leakage add to the nominal timing error. Output loading and the selected duty cycle also influence whether the circuit operates near the published frequency limit.
Recommended
Monostable Pulse and Delay Circuit
The TS555ID can implement a monostable timer for controlled output pulses and system delays. In this topology, an external trigger starts a timing interval set by one resistor and one capacitor, after which the output returns to its inactive state. The 2 V to 18 V supply range supports both 5 V embedded logic and higher-voltage control environments. Unlike a software timer, the hardware timer continues its timing sequence without microcontroller program execution, which can simplify deterministic interlocks or retry sequences. Pulse duration must include the device's timing tolerance and the propagation characteristics of the trigger and output stages.
Recommended
Debounce and Retrigger Timing
The TS555ID is suitable for hardware debounce, watchdog-style retriggering, and pulse conditioning. A noisy mechanical or relay contact can be connected to the trigger and threshold functions so that only a valid pulse reaches the downstream logic. The device's 110 µA typical current at 5 V helps preserve battery life in portable equipment, while its CMOS construction reduces supply-current spikes during output transitions. The timing interval should exceed the expected contact bounce duration, and designers should verify that the input network rejects noise without preventing valid retriggering. This approach reduces repetitive microcontroller polling when continuous hardware qualification is preferable.
Recommended
Embedded Clock and Tone Generation
The TS555ID can provide a simple clock, beep, or modulation source for embedded products without dedicating a timer peripheral. Its 2.7 MHz maximum astable frequency gives substantial timing range compared with the 0.1 MHz maximum cited for a bipolar NE555 in the supplied data. The low 110 µA typical supply current at 5 V supports always-on auxiliary functions where power is limited. In audio signaling applications, output pulse width and repetition rate should be checked against the transducer driver requirements. If the clock must be synchronized to a processor, an MCU timer or crystal-based clock will usually provide more deterministic phase control.
Recommended
Industrial Pulse and Watchdog Timing
The TS555ID can support industrial pulse generation, restart timing, or watchdog-style sequencing where a simple hardware timeout is sufficient. Its 2 V to 18 V supply range is convenient for 5 V logic and higher-voltage control systems, while the 2.7 MHz frequency capability permits faster timing than the bipolar NE555 cited in the manufacturer comparison. Use the timer to supervise a periodic heartbeat rather than for safety-critical protection unless the complete system has been independently validated. Output current, trigger thresholds, and temperature limits are not present in the supplied excerpts and must be confirmed before using the device in a demanding industrial environment.
Recommended
Portable Sensor and Control Module
The TS555ID is appropriate for a portable sensor or control module that needs a small, low-power timing primitive for periodic sampling, delayed actuation, or local signal generation. Its 8-pin SOIC package supports compact surface-mount layouts, and the 110 µA typical supply current at 5 V is favorable for battery-operated operation. The timer can run alongside a low-power microcontroller, although an MCU timer may offer easier calibration and logging. If the module includes analog sensing, keep the TS555 timing path physically separated from sensitive nodes and use a stable reference capacitor. The supplied data does not specify an operating-temperature grade, so environmental requirements must be checked before deployment.
Recommended
Recommended Products Summary
Engineering reference data for TS555ID — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TS555CDT | TS555IDT | LMC555CM/NOPB |
|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Timer Type | Single CMOS 555 timer/oscillator | Single CMOS timer | Single CMOS timer | Single CMOS timer |
Key Differentiators
- Higher maximum oscillator frequency than the cited TS555CDT (vs TS555CDT)
- Direct same-family ordering option with matched stated frequency (vs TS555IDT)
- Verified STMicroelectronics family alternative with identified 2 MHz ceiling (vs TS555CDT)
Design Notes
Do not treat a shared SOIC-8 footprint as proof of unconditional interchangeability. Before replacing TS555ID with TS555CDT, TS555IDT, or LMC555CM/NOPB, verify the numbered pin functions, supply range, trigger and threshold levels, output-current capability, timing tolerance, operating-temperature grade, and maximum frequency. The supplied data confirms the same broad package family for these candidates, but it does not provide every electrical rating needed for a production substitution.
Place the supply bypass capacitor and timing capacitor close to their associated IC pins, and keep the timing-resistor network away from high-current switching nodes. A long timing-capacitor connection adds parasitic capacitance that can shift oscillator frequency, while contamination or flux residue can change effective resistance. Use a clean board and stable capacitor technology, and include the component tolerances plus leakage effects in the timing-error calculation.
The TS555ID's 110 µA typical supply current at 5 V makes it appropriate for low-power designs, but current is not constant under every condition. Output transitions can cause supply-current spikes, and frequency, load capacitance, and timing resistance affect average consumption. Provide local supply bypassing and verify the power source can handle dynamic current peaks without causing rail droop that shifts the timing thresholds.
For astable operation, calculate the timing network from the device's specified trigger and threshold fractions rather than assuming ideal switching points. Compare resistor and capacitor tolerances, input bias currents, capacitor temperature coefficient, leakage, and output loading to determine total period error. At frequencies near the 2.7 MHz maximum, propagation delay and board parasitics may become significant, so oscilloscope measurements on the final layout are advisable.
Compliance Information
The supplied verified data does not include explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for TS555ID. No compliance status has been inferred.