TS556CD - Dual CMOS Timer, 2.7MHz, 14-SOIC | STMicroelectronics
N.º da peça: TS556CD ✗ Fim de vida| Qtd. | Preço unitário | Total |
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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 |
TS556CD Visão geral
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.
Alternativas drop-in para TS556CD — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TLC556CD
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
NE556DR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TS556CD Especificações
| 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 |
| Corrente de alimentação | 130 µA, distributor specification |
| Typical Supply Current at 5 V | 220 µA, manufacturer-family specification |
| Temperatura de operação | 0 °C to 70 °C |
| Encapsulamento | 14-SOIC, 0.154 inch body width, 3.90 mm |
| Tipo de montagem | 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 |
Guia de Configuração de Pinos do TS556CD 14-soic, 0.154 inch body width, 3.90 mm
Configuração de pinos para TS556CD (pacote 14-soic, 0.154 inch body width, 3.90 mm). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para TS556CD.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TS556CD é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TS556CD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Higher stated maximum astable frequency (vs NE556DR)
- Low-power CMOS implementation (vs NE556N)
- Dual timing functions in a surface-mount package (vs NE556N)
Notas de projeto
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.
Informações de conformidade
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.
