TS556IDT

Overview

The TS556IDTTR is a dual CMOS timer manufactured by STMicroelectronics, designed for low power consumption and high-frequency operation. It features two independent timers within a 14-pin SO package (SOIC-14). The device operates on a supply voltage range of 2V to 16V and supports an industrial temperature range from -40°C to +125°C. Key electrical parameters include a maximum propagation delay of 100ns at 10pF load, typical supply current of 220μA at 5V, and a maximum astable frequency of 2.7MHz. The output is compatible with TTL, CMOS, and logic MOS standards.

Feature Summary

• Dual CMOS timer architecture with pin-to-pin compatibility to bipolar NE556
• Low power consumption: 220μA typ at VCC=5V and 180μA typ at VCC=3V
• High maximum astable frequency of 2.7MHz
• Wide operating voltage range from 2V to 16V

Applications

• General purpose timing and pulse generation circuits
• Timing delays in monostable mode applications
• Oscillator circuits in astable mode
• Replacement for bipolar NE556 in existing designs

Procurement Notes

Verify the specific ordering suffix when purchasing. The provided model TS556IDT typically refers to the tube version, while TS556IDTTR denotes the tape and reel variant. Confirm package type and quantity requirements with the supplier to ensure alignment with manufacturing needs. Check RoHS compliance status as indicated in official documentation.

Selection Notes

Select this component for applications requiring low standby current and high-frequency stability compared to bipolar alternatives. Ensure the design accommodates the 2V to 16V supply range. Consider the SO-14 surface mount package constraints during PCB layout. Verify thermal dissipation requirements if operating near the upper temperature limit of 125°C.

Part Context

The TS556 series belongs to STMicroelectronics' family of low-power CMOS timers. It serves as a modern, energy-efficient alternative to traditional bipolar NE556 timers. The 'I' suffix indicates an extended industrial temperature range (-40°C to +125°C), distinguishing it from commercial grade variants like the TS556CD which operate from 0°C to 70°C.

Replacement Considerations

The TS556IDTTR is functionally and pin-compatible with the NE556. Other compatible parts in the TS556 family include TS556CD and TS556CN, though these differ in temperature range and packaging.