TS556IN

Overview

The TS556IN is a dual CMOS timer manufactured by STMicroelectronics, housed in a 14-pin PDIP package. It operates within a supply voltage range of 2 V to 16 V and supports temperatures from -40 °C to +125 °C. The device features two independent timers with a maximum propagation delay of 100 ns. Output drivers are compatible with CMOS, MOS, and TTL logic families. High input impedance minimizes timing capacitor requirements, while reduced supply current spikes during transitions allow for smaller decoupling capacitors compared to bipolar equivalents.

Feature Summary

• Dual CMOS timer architecture with low power consumption (220 μA typ at 5 V)
• Wide operating voltage range from 2 V to 16 V
• High maximum astable frequency of 2.7 MHz
• Pin-to-pin and functionally compatible with bipolar NE556

Applications

• General-purpose timing circuits in monostable and astable modes
• Time delay generation and pulse shaping
• Frequency division and counting applications
• Logic clock signal generation

Procurement Notes

Verify component status as the TS556IN may be discontinued or subject to limited availability. Confirm package integrity and pin alignment against the 14-DIP specification before integration. Check for alternative active versions if long-term supply stability is required for production designs.

Selection Notes

Select the TS556IN when bipolar NE556 compatibility is needed with lower power consumption. Ensure the design accommodates the 2 V to 16 V supply range. Consider the 100 ns propagation delay for high-speed timing requirements. Verify that the through-hole PDIP-14 package fits the target PCB layout constraints.

Part Context

The TS556IN belongs to the TS556 series of low-power dual CMOS timers. This series serves as a direct replacement for the standard bipolar NE556, offering improved power efficiency and higher frequency performance. The 'IN' suffix denotes the specific PDIP-14 through-hole packaging variant produced by STMicroelectronics.

Replacement Considerations

The TS556IN is functionally equivalent to the NE556. Other variants in the TS556 family, such as TS556IDTTR (SOIC-14) or TS556CN (PDIP-14), offer different packages or temperature ranges but share core functionality.