TS556CD

Overview

The TS556CD is a low-power dual CMOS timer manufactured by STMicroelectronics, housed in a 14-SOIC package. It operates within a supply voltage range of 2 V to 16 V and supports an ambient temperature range from -40 °C to +85 °C. The device features two independent timers with a maximum propagation delay of 100 ns and a high maximum astable frequency of 2.7 MHz. Typical supply current consumption is 220 μA at 5 V and 180 μA at 3 V. The output stage is compatible with TTL, CMOS, and logic MOS standards.

Feature Summary

• Low power consumption: 220 μA typ at VCC = 5 V
• High maximum astable frequency: 2.7 MHz
• Wide supply voltage range: 2 V to 16 V
• Output compatible with TTL, CMOS, and logic MOS

Applications

• Timing delays
• Pulse generation
• Time sequencing
• Burst generation

Procurement Notes

Verify the specific suffix 'CD' indicates the commercial temperature grade (-40 °C to +85 °C) versus industrial variants. Confirm the 14-SOIC package type matches the target PCB footprint. Check for RoHS compliance status on the official datasheet before ordering.

Selection Notes

Select this component when low power consumption is critical compared to bipolar NE556 alternatives. Ensure the required operating frequency does not exceed 2.7 MHz. Verify that the 2 V minimum supply voltage meets the system's lowest operating condition.

Part Context

The TS556 series is the CMOS counterpart to the bipolar NE556. It offers significantly lower quiescent current and higher speed capabilities while maintaining pin-to-pin compatibility with legacy designs.

Replacement Considerations

Functionally compatible with bipolar NE556 devices. Verify voltage and temperature specifications against original design requirements.