TS556IN - Dual 2.7 MHz CMOS Timer | STMicroelectronics
料号： TS556IN ✓ 量产中TS556IN 概述
A programmable timer is an oscillator-and-triggering circuit that produces a timed output pulse. A 555-type timer belongs to the clock and timing IC hierarchy: timer and oscillator > programmable timer > clock and timing integrated circuit > semiconductor. In monostable mode, one trigger produces a pulse of a defined duration. In astable mode, the two internal comparators and flip-flop repeatedly charge and discharge an external timing capacitor, creating continuous pulses. Two independent timer sections can therefore control separate events or generate related timing sequences.
The TS556IN combines several useful characteristics for timer applications. Its maximum astable frequency is 2.7 MHz, allowing short timing periods when supported by suitable external resistors and capacitors. The verified operating-voltage information identifies a 2 V minimum supply and a 16 V maximum supply for TS556IN. Additional family-level features include high output-current capability, reduced supply-current spikes during output transitions, and compatibility with bipolar NE555 implementations. The reported operating-temperature range is -40 °C to +125 °C, supporting industrial-temperature designs.
Internally, the TS556 is a CMOS implementation of the classic dual-timer architecture. Each section uses voltage thresholds, a discharge transistor, and an output stage to compare an external capacitor voltage with control levels derived from the supply voltage. CMOS operation is principally valuable for low supply consumption and reduced switching activity compared with the bipolar NE555. Designers must still account for timing-component tolerance, output rise and fall behavior, and the maximum astable frequency when setting high-frequency operating conditions.
Typical uses include pulse generation, delay and retrigger circuits, periodic switching, lamp and motor control, low-frequency oscillators, and two-channel industrial timing systems. TS556IN is particularly appropriate where a through-hole 14-DIP footprint and dual timer are required rather than a surface-mount package. In an astable oscillator, external R-A, R-B, and capacitor C values determine the repetition rate and duty cycle; the 2.7 MHz maximum frequency is an important upper-bound constraint for high-speed timing designs.
The primary design consideration is preserving the 555-compatible timing architecture while allowing adequate tolerance and ESR for the selected capacitor. Place timing components close to the device, keep discharge-current paths compact, and avoid excessive loading of the threshold and trigger nodes. Because the part is supplied in a through-hole DIP package, board spacing, connector accessibility, and thermal performance should be checked before using it in new compact designs.
This product page consolidates verified distributor specifications, manufacturer-family information, application guidance, packaging details, and available replacement references. It distinguishes directly documented TS556IN characteristics from family-level or distributor-supplied information and explicitly identifies data that remains unavailable, allowing engineers to make sourcing and design decisions without relying on unverified assumptions.
直接替换替代料： TS556IN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TLC556IN
✅ 直接替换📋 参考替代料（不在目录中）
TS556IN 规格参数
| Timer Type | 555 Type, Timer/Oscillator (Dual) IC |
| Number of Timer Sections | 2 |
| Technology | CMOS |
| Maximum Astable Frequency | 2.7 MHz |
| Minimum Supply Voltage | 2 V |
| Maximum Supply Voltage | 16 V |
| TS556 Family Voltage Range | Up to +18 V |
| Typical Supply Current | 100 µA at VCC = 5 V |
| TS556 Family Typical Supply Current | 220 µA at VCC = 5 V |
| 工作温度范围 | -40 °C to +125 °C |
| 封装 | 14-DIP (0.300 inch, 7.62 mm) |
| 引脚数 | 14 pins |
| 安装类型 | Through-hole |
| Packaging Type | Tube |
| Compatibility | Pin-to-pin and functionally compatible with bipolar NE555 |
| Output Capability | High output current capability |
| Supply Current Spike Behavior | Reduced during output transitions |
| Datasheet Length | 11 pages |
TS556IN 14-dip (0.300 inch, 7.62 mm) 引脚配置指南
TS556IN（14-dip (0.300 inch, 7.62 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： TS556IN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TS556IN 适用于 6 应用s: Industrial Pulse and Delay Generation, Astable Oscillator and Clock Generation, LED Flashing and Indicator Control, Motor and Solenoid Control, Power-Supply and Monitoring Timing, Audio and Communication Tone Generation.
Industrial Pulse and Delay Generation
The TS556IN fits industrial pulse-generation and time-delay circuits because it provides two independent 555-type timer sections, a 2.7 MHz maximum astable frequency, and a reported -40 °C to +125 °C operating range. Each section can be configured as a monostable or astable timer to produce fixed-duration events or repetitive pulses. The CMOS implementation also addresses low-power operation, with one verified datasheet excerpt quoting 100 µA typical supply current at VCC = 5 V. In a delay circuit, the trigger, threshold, discharge, and timing capacitor establish the output interval. Designers must verify capacitor tolerance, reset behavior, output loading, and supply regulation because timing accuracy and repeatability depend on those external and operating conditions.
推荐
Astable Oscillator and Clock Generation
The TS556IN is suitable for astable oscillation because its verified maximum astable frequency is 2.7 MHz and its architecture is compatible with the bipolar NE555. Two timer sections can create related clocks, modulation signals, or flash sequences without adding two separate IC packages. External resistors and a capacitor determine the repetition rate and duty cycle, so component tolerance and temperature coefficient directly affect timing stability. At low frequencies, capacitor leakage may become important; at high frequencies, propagation delay, output transition time, and layout parasitics must be checked. The 14-DIP footprint is especially useful for through-hole repair and prototype boards where maintainability and visual inspection are priorities.
推荐
LED Flashing and Indicator Control
The TS556IN can implement LED flashing, warning indicators, and alternating beacon controls using its two timer sections. One section can establish a repetition rate while the other derives a shifted or complementary timing interval, reducing the number of discrete timers required. The reported high output-current capability supports driving typical indicator circuitry, but the exact load, series resistance, and pulse duration must be checked against the device limits. Because this is a through-hole 14-DIP package, it is practical for industrial control panels, educational equipment, and legacy repair assemblies. Low-power CMOS operation also helps when the timer runs continuously, although the indicator driver should still be checked for injected current and switching transients.
推荐
Motor and Solenoid Control
The TS556IN is appropriate for basic motor, solenoid, and relay timing sequences where a defined on-time or repeated pulse is required. Its dual timer sections can provide an activation interval and an interlock delay, while the reported high output-current capability simplifies driving suitable transistor stages. The timer does not directly supply motor power; an appropriately rated transistor, flyback protection element, and separate load supply are still required. Designers should account for inductive voltage spikes, contactor inrush current, and the output transistor's switching behavior. The 2.7 MHz maximum astable frequency gives ample timing range, while the 14-DIP package supports serviceable through-hole control boards.
推荐
Power-Supply and Monitoring Timing
The TS556IN can provide repetitive monitoring or sampling intervals in power-supply control and supervisory systems, provided its 2 V to 16 V supply requirement is compatible with the monitored rail. One timer can initiate periodic checks while the other creates a delay before an action or acknowledgment signal. The low-power CMOS characteristic is useful in continuously operating equipment, and a source reports 100 µA typical supply current at VCC = 5 V. Designers must avoid exceeding the verified TS556IN maximum supply voltage, account for startup and reset behavior, and keep sensitive threshold inputs away from noisy switching nodes. Galvanic isolation, protection, and output-interface requirements remain outside the timer IC and must be implemented separately.
推荐
Audio and Communication Tone Generation
The TS556IN can generate low-frequency tones, audible test signals, or simple communication timing waveforms using the two astable timer sections. Its 2.7 MHz maximum astable frequency provides a wide timing range, although practical output quality near that limit depends on timer resolution and external component behavior. Low-frequency tone generation benefits from the CMOS implementation's low supply consumption, while the 14-DIP package allows straightforward prototyping in legacy audio equipment. The output stage should drive a coupling or amplification stage rather than a speaker directly in most designs. Timing-component tolerance, temperature drift, supply ripple, and unwanted coupling into nearby audio paths should be evaluated on the PCB to prevent frequency instability or audible noise.
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推荐产品汇总
工程参考数据： TS556IN ——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 | TLC556IN |
|---|---|---|
| Package | 14-DIP (0.300 inch, 7.62 mm) | 14-DIP (0.300 inch, 7.62 mm) |
| Brand | STMicroelectronics | Texas Instruments |
| Timer Configuration | Dual 555 Type, Timer/Oscillator | Dual 555 Type, Timer/Oscillator |
| Technology | CMOS | CMOS |
关键差异点
- Exact STMicroelectronics dual CMOS timer identity （对比 TLC556IN)
- Verified maximum astable frequency （对比 TLC556IN)
- Verified TS556IN supply range （对比 TLC556IN)
- Low-power CMOS implementation （对比 TLC556IN)
设计说明
Do not apply the TS556 family's broader voltage statement to TS556IN without checking the exact datasheet limits. The verified TS556IN listing gives 2 V to 16 V, while other TS556 family material describes operation up to +18 V. Use 16 V as the verified TS556IN ceiling, include adequate supply decoupling, and confirm reset and trigger levels at the actual VCC value.
Keep the timing capacitor and timing resistors close to the timer pins, and route threshold and trigger traces away from output and switching nodes. The TS556IN uses a 14-DIP through-hole footprint, so use adequate spacing for the 7.62 mm pin pitch and inspect solder joints after assembly. A solid ground plane and short supply paths reduce susceptibility to false triggering in industrial environments.
Calculate the timing network for the intended supply rather than assuming a fixed frequency across the complete 2 V to 16 V range. Resistance and capacitance tolerances, threshold tolerances, output delay, and the 2.7 MHz maximum astable-frequency limit all affect usable timing accuracy. Use the manufacturer equations and worst-case component tolerances, and verify that the selected capacitor technology has suitable leakage and temperature characteristics.
For high-frequency astable operation, minimize capacitance at the threshold and trigger pins and account for PCB parasitic capacitance. The 2.7 MHz figure is the maximum astable frequency, not a guaranteed operating point with every external network. Probe the actual output waveform at the load and verify rise time, duty cycle, overshoot, and ringing before increasing frequency.
合规信息
The verified web data does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for TS556IN. No compliance claim has been inferred.
