TS556CN

Overview

The TS556CN is a dual CMOS timer manufactured by STMicroelectronics, belonging to the TS556 series. It integrates two independent timers within a single PDIP-14 package designed for through-hole mounting. The device operates on a supply voltage range of 2 V to 16 V and supports a maximum astable frequency of 2.7 MHz. Key electrical specifications include a typical supply current of 220 μA at 5 V, a propagation delay of 100 ns maximum, and an output configuration compatible with CMOS, MOS, and TTL logic families. The component features high input impedance and reduced supply current spikes during transitions.

Feature Summary

• Dual CMOS timer architecture with low power consumption (220 μA typ at 5 V)
• High maximum astable frequency of 2.7 MHz
• Wide operating voltage range from 2 V to 16 V
• Output compatibility with CMOS, MOS, and TTL logic levels

Applications

• Timing generation in monostable and astable modes
• Sequential timing circuits requiring dual channels
• Low-power clock signal generation

Procurement Notes

The TS556CN is listed as an End-of-Life (EOL) product by STMicroelectronics. Availability is restricted, and it may not be sold in all regions through standard distributors. Verification of current stock status and alternative sourcing channels is required before procurement planning.

Selection Notes

Select the TS556CN when a dual-timer solution with low quiescent current is needed in a through-hole package. Ensure the design accommodates the 2 V to 16 V supply range and requires TTL/CMOS compatible outputs. For industrial temperature ranges (-40°C to +125°C), consider the TS556ID variant instead.

Part Context

The TS556CN is part of the TS556 family, which serves as a low-power CMOS replacement for bipolar NE556 timers. It offers pin-to-pin and functional compatibility with the NE556 while providing significantly lower power consumption and higher maximum frequencies. The 'C' suffix typically denotes commercial temperature grade operation.

Replacement Considerations

Public confirmed substitute part numbers: TS556IN (PDIP-14, -40°C to +125°C). Note that the TS556CN itself is discontinued.