TS556IDTTR

Overview

The TS556IDTTR is a dual-channel CMOS timer manufactured by STMicroelectronics, housed in a surface-mount SO-14 package. It operates within a supply voltage range of 2 V to 16 V and supports an industrial temperature range from -40 °C to +125 °C. The device features two independent timers with a maximum propagation delay of 100 ns at 10 pF load. 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

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

Applications

• Precision timing circuits requiring low power consumption
• Frequency generation and pulse width modulation applications
• Timing delays in industrial control systems

Procurement Notes

Verify the specific suffix 'DTTR' indicates tape-and-reel packaging for automated assembly. Confirm the 'I' grade designation corresponds to the industrial temperature range (-40 °C to +125 °C) required for the application environment. Ensure the SO-14 footprint matches the PCB layout specifications.

Selection Notes

Select this component when dual independent timers are needed in a single package with low quiescent current. The TS556IDTTR is suitable for designs requiring operation across wide voltage rails (2 V–16 V). Compare against standard bipolar timers if lower power dissipation and higher frequency stability (up to 2.7 MHz) are critical design constraints.

Part Context

The TS556 series represents STMicroelectronics' low-power CMOS alternative to standard bipolar timers. The TS556IDTTR specifically denotes the industrial temperature grade variant packaged in a reel format. This part belongs to the broader TS55x family, which includes single-channel (TS555) and dual-channel (TS556) configurations designed for high-frequency accuracy and reduced supply current spikes.

Replacement Considerations

The TS556IDTTR is functionally compatible with the NE556. Other variants in the same package include TS556CDTTR (commercial temperature) and TS556IDT (tube packaging). Verify temperature ratings and packaging type when substituting.