TS556CD - Dual CMOS Timer, 2.7MHz, 14-SOIC | STMicroelectronics
料号： TS556CD ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TS556CD 概述
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.
直接替换替代料： TS556CD ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TS556CD （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, Timer Configuration.
快速对比工具——选择替代料号进行并排对比：
TLC556CD
✅ 直接替换📋 参考替代料（不在目录中）
NE556DR
✅ 直接替换📋 参考替代料（不在目录中）
TS556CD 规格参数
| Product Type | Dual CMOS timer and oscillator |
| Timer Configuration | Two independent 555-type timer sections |
| Maximum Astable Frequency | 2.7 MHz |
| Minimum Supply Voltage | 2 V |
| Maximum Supply Voltage | 16 V |
| 电源电流 | 130 µA, distributor specification |
| Typical Supply Current at 5 V | 220 µA, manufacturer-family specification |
| 工作温度 | 0 °C to 70 °C |
| 封装 | 14-SOIC, 0.154 inch body width, 3.90 mm |
| 安装类型 | Surface Mount |
| Logic Family | CMOS |
| Timing Modes | Monostable and astable |
| Compatibility | Pin-to-pin and functionally compatible with bipolar NE556 |
| Low-Power Feature | Very low power consumption |
| High-Frequency Feature | Maximum astable frequency of 2.7 MHz |
TS556CD 14-soic, 0.154 inch body width, 3.90 mm 引脚配置指南
TS556CD（14-soic, 0.154 inch body width, 3.90 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TS556CD.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TS556CD 适用于 6 应用s: Astable Oscillator and Clock Generation, Monostable Pulse and Delay Circuits, LED Flashing and Indicator Drive, Industrial Control and Delay Sequencing, Embedded Control and Signal Conditioning, Low-Power Portable Instrumentation.
Astable Oscillator and Clock Generation
TS556CD is suitable for continuous oscillator designs because each timer section can be configured in astable mode using external resistors and capacitors. The verified 2.7 MHz maximum astable frequency provides useful margin for low-frequency timing and higher-frequency signal-generation experiments, while the 2 V to 16 V supply range allows operation across multiple logic-rail conditions. Designers should calculate the timing network from the exact datasheet equations, account for capacitor tolerance, and check output loading before operating near the stated frequency limit.
推荐
Monostable Pulse and Delay Circuits
The TS556CD can implement monostable one-shot timing for delayed switching, pulse stretching, and control-signal conditioning. Its two timer sections allow independent timing events or a pair of related delay functions in one package, reducing board area compared with two discrete timers. The external timing capacitor and resistors determine pulse width, so stable components and adequate output-drive margin are important. The 2 V minimum supply is useful for low-voltage control systems, subject to the exact input thresholds and timing behavior specified by the manufacturer datasheet.
推荐
LED Flashing and Indicator Drive
TS556CD is appropriate for LED blinking, periodic indicator, and simple annunciator circuits where a low-frequency astable oscillator can drive a transistor or other current-limiting stage. The dual-timer package can produce two asynchronous flashing rates, or one section can be used for a timing function while the second handles another periodic event. Select the LED current-limiting resistor from the supply voltage and LED forward current, and verify the output sink or source capability of the exact device under the required duty cycle. Obsolete lifecycle status makes sourcing particularly important for maintenance builds.
推荐
Industrial Control and Delay Sequencing
A dual timer IC can support industrial control sequencing, relay-command delays, and periodic actuator updates when the timing requirements remain within the device's voltage and frequency limits. TS556CD provides two timer channels in a 14-SOIC package, which can simplify routing and reduce component count. The design must account for supply transients, reset behavior, output isolation, and the fact that a timer does not directly provide the isolation or drive current required by a relay. A transistor or driver interface should be selected for the actual load and operating environment.
推荐
Embedded Control and Signal Conditioning
TS556CD can act as a compact timing adjunct to an embedded controller by producing delayed pulses, sampling windows, or repetitive control signals without occupying a microcontroller timer for the entire interval. The low-power CMOS implementation is attractive for compact control boards, while the dual architecture allows one timer to handle a recurring task and the other to manage a one-shot event. Firmware and hardware must agree on active levels and timing tolerances. The controller interface should include appropriate reset, pull, and overvoltage protection rather than assuming every NE556 replacement has identical output behavior.
推荐
Low-Power Portable Instrumentation
The TS556CD's low-power CMOS architecture can fit portable test and measurement circuits where battery consumption matters and timing must remain independent of a microcontroller. It can generate a periodic calibration stimulus, flashing status indication, or delayed trigger in a compact instrument. Actual battery-life benefit depends on the complete circuit because one distributor summary gives 130 µA supply current and the manufacturer-family result cites 220 µA typical at 5 V. Confirm the exact datasheet value, operating state, and external-component leakage before estimating battery life.
推荐
推荐产品汇总
工程参考数据： TS556CD ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TLC556CD | NE556DR | NE556N | TLC556IP | LMC556CN |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-DIP | 14-DIP | 14-DIP |
| Brand | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Timer Architecture | Dual CMOS timer | Dual CMOS timer | Dual bipolar timer | Dual bipolar timer | Dual CMOS timer | Dual CMOS timer |
关键差异点
- Higher stated maximum astable frequency （对比 NE556DR)
- Low-power CMOS implementation （对比 NE556N)
- Dual timing functions in a surface-mount package （对比 NE556N)
设计说明
Estimated: using the distributor-listed 130 µA supply current at 5 V, the ideal device-only power is approximately 0.65 mW. Using the manufacturer-family figure of 220 µA at 5 V gives approximately 1.10 mW. These are estimates and exclude external resistors, capacitor leakage, load current, and switching losses. Confirm the exact TS556CD operating state and datasheet test conditions before sizing a battery or low-power budget.
Keep the timing resistors and capacitor close to the corresponding TS556CD timer pins to minimize parasitic capacitance and board-trace delay. Route the two timer sections separately when their timing networks or outputs are unrelated, and keep the ground return short and continuous. Confirm the 14-SOIC land pattern and pin orientation against the exact package drawing; the supplied search results identify the package but do not provide a complete pin table.
Do not select a replacement solely because it is labeled a 556 timer. Verify pin names, supply range, trigger and threshold thresholds, output drive, reset polarity, control-voltage behavior, timing tolerances, and package. The verified TS556CD data gives 2 V to 16 V operation and 2.7 MHz maximum astable frequency, while alternative-family details are incomplete. A footprint match does not guarantee electrical interchangeability.
At high astable frequencies, capacitor ESR, propagation delay, and output loading can shift the actual oscillation frequency from the ideal resistor-capacitor calculation. Use low-leakage, stable timing capacitors and avoid excessive loading on the timing nodes. If the circuit drives a long trace, buffer the output or use a suitable driver stage. Validate timing with an oscilloscope across temperature and supply-voltage variation.
Estimated: with a 5 V supply and 2.7 MHz oscillator operation, device power is expected to be close to the low milliwatt range under the listed CMOS supply currents, but the final value depends on the actual configuration and external load. SOIC thermal analysis is therefore normally less important than timing-node stability for this part, provided the package is not driving a high-current load directly. Verify the output-current limits before using the timer pin as a power-stage driver.
合规信息
The supplied verified web results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for TS556CD. AEC-Q100 is marked not_applicable because this is a general-purpose timer IC, not an automotive-qualified device claim.
