TS555CD - 2.7MHz CMOS Timer | STMicroelectronics | SOIC-8
MPN： TS555CD ✗ 停產TS555CD 概覽
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.
直接替換替代品，適用於 TS555CD — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TS555CD （相同外形與佔位） — 差異在於 Maximum Frequency, Operating Modes, Package, Supply Voltage Range.
TLC555CD
✅ 直接替換📋 參考替代品（不在目錄中）
TS555CD 規格
| Timer Type | 555 Type, Timer/Oscillator (Single) IC |
| Process Technology | CMOS |
| Supply Voltage Range | 2 V to 16 V |
| Maximum Frequency | 2.7 MHz |
| Typical Supply Current | 100 µA at VCC = 5 V |
| Manufacturer Product Page Supply Current | 110 µA at VCC = 5 V |
| Distributor-Listed Supply Current | 65 µA |
| 工作溫度範圍 | 0 °C to 70 °C |
| 封裝 | 8-SOIC (0.154", 3.90 mm body width) |
| 安裝類型 | Surface Mount |
| 腳位數 | 8 pins |
| Operating Modes | Astable and Monostable |
| NE555 Compatibility | Pin-to-pin and functionally compatible |
| Output Current Capability | High output current capability; exact value not supplied |
| Supply Current Spikes | Reduced during output transitions |
| Product Status | Obsolete |
TS555CD 腳位配置
| 腳位 1 | GND — Ground reference |
| 腳位 2 | TRIG — Trigger input |
| 腳位 3 | OUT — Timer output |
| 腳位 4 | RESET — Reset input |
| 腳位 5 | CTRL — Control-voltage input |
| 腳位 6 | THR — Threshold input |
| 腳位 7 | DIS — Discharge output |
| 腳位 8 | VCC — Power supply input |
典型應用
TS555CD 適用於 6 應用s: High-Speed Astable Oscillator, Industrial Delay and Retrigger Circuit, Battery-Powered Monitoring Timer, LED Flasher and Visual Indicator, Pulse Generator for Control Systems, Embedded System Timing Auxiliary.
High-Speed Astable Oscillator
The TS555CD fits a free-running oscillator because its verified maximum astable frequency is 2.7 MHz, well above the cited 0.1 MHz limit of the conventional bipolar NE555. Configure the timing resistors and capacitor around the output waveform required by the load. Because high-frequency operation reduces the timing period, capacitor and resistor tolerances can become a larger fraction of the cycle, so validate frequency spread and output waveform over temperature before production.
推薦
Industrial Delay and Retrigger Circuit
The TS555CD is suitable for a monostable delay or retriggerable pulse stage in industrial control equipment, where its 2 V to 16 V supply range supports multiple rail architectures. Its CMOS implementation has a verified typical supply current of about 100 µA at 5 V, helping limit standby consumption. Use the output to drive an isolated relay driver or logic stage, and check the unspecified output-current limit before adding substantial load.
推薦
Battery-Powered Monitoring Timer
The low-power CMOS TS555CD can provide periodic wake-up or timeout timing in a battery-powered sensor or monitoring system. The verified 100 µA typical current at 5 V is substantially below the cited 3 mA typical value for the bipolar NE555. Real battery performance still depends on the timing capacitor leakage, external pull networks, load duty cycle, and the quiescent current of the associated sensor, so measure the complete assembled circuit.
推薦
LED Flasher and Visual Indicator
The TS555CD can generate repetitive pulses for an LED flasher, beacon, or panel indicator without using a microcontroller. Its 2.7 MHz maximum timing capability offers more than enough bandwidth for visible flash rates and permits compact RC timing networks. The timer output should drive the LED through an appropriate current-limiting path or transistor, and the duty cycle must be checked against both LED thermal limits and the timer's verified output capability.
推薦
Pulse Generator for Control Systems
The TS555CD can produce trigger pulses for a comparator, sensor interface, or discrete control stage where exact repetition rate matters more than absolute high precision. Its dual monostable and astable capability allows the same architecture family to support both one-shot events and continuous timing. Place the RC timing network close to the device, isolate sensitive signal paths from the output edges, and verify pulse width at the temperature and supply extremes.
推薦
Embedded System Timing Auxiliary
TS555CD provides an independent hardware timing channel alongside a microcontroller, allowing delayed reset, watchdog-style pulses, or repetitive service timing to continue without firmware intervention. Its 2 V to 16 V range can simplify interfacing across common supply domains, while the 8-SOIC package is straightforward to place on mixed analog and digital boards. Coordinate the timer period with the host reset requirements and validate startup behavior across power-on supply ramps.
推薦
推薦產品摘要
工程參考資料，適用於 TS555CD — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TLC555CD |
|---|---|---|
| Brand | STMicroelectronics | Texas Instruments |
| Package | 8-SOIC | 8-SOIC |
| Timer Type | 555 Type, Timer/Oscillator (Single) IC | 555 Type, Timer/Oscillator (Single) IC |
| Number of Pins | 8 pins | 8 pins |
主要差異化特點
- Higher verified maximum astable frequency (對比TLC555CD)
- Low-power CMOS implementation (對比TLC555CD)
- Broad verified supply-voltage range (對比TLC555CD)
設計說明
Place the timing resistor and capacitor network close to the threshold, trigger, and discharge pins, and route the timing node away from the output and supply-current spikes. Keep the 8-SOIC footprint and land pattern compatible with the replacement being qualified; although TLC555CD appears in the same-package comparison data, pin functions and electrical limits should still be checked in the current manufacturer datasheet.
Add local supply decoupling at the TS555CD and treat output transitions as potential supply disturbances. The verified family data states that supply-current spikes are reduced during output transitions, but it does not provide a numeric spike limit or output-current rating. Use the manufacturer output characteristics and application guidance to size the local capacitor and any output driver instead of extrapolating from another 555 part.
Do not treat the TS555CD as a universal NE555 replacement without checking the exact suffix, package, supply range, temperature grade, and maximum frequency. The target is listed as obsolete and uses a 0 °C to 70 °C commercial-grade range. New designs should first confirm an acceptable lifecycle path, then verify reset behavior, output polarity, and timing limits across temperature and supply tolerance.
At high astable frequencies, output edge currents and parasitic coupling can affect timing accuracy and nearby analog signals. Keep the discharge and output return paths compact, maintain a ground reference close to the device, and separate sensitive inputs from the timer network. If the application relies on precise frequency, measure frequency drift with the final capacitor, resistor, load, PCB, and supply configuration.
合規資訊
The supplied verified data does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because TS555CD is an industrial/commercial timer IC rather than an automotive-qualified device.
