TS555CDT

Overview

The TS555CDT is a single-channel CMOS timer manufactured by STMicroelectronics, designed as a low-power alternative to standard bipolar timers. It operates within a supply voltage range of +2 V to +16 V and supports surface-mount installation in an SOIC-8 package. The device features a maximum propagation delay of 100 ns and can achieve high-frequency operation up to 2.7 MHz. Key electrical specifications include a typical supply current of 110 μA at 5 V, a high input impedance of 10^12 Ω, and output drive capabilities of 50 mA (high) and -10 mA (low). The component is rated for commercial operating temperatures between 0°C and +70°C.

Feature Summary

• Low power consumption with typical supply current of 110 μA at 5 V
• High maximum astable frequency of 2.7 MHz
• Pin-to-pin functionally compatible with bipolar NE555
• Wide voltage supply range from +2 V to +16 V

Applications

• Time delay generation in monostable mode
• Programmable oscillation in astable mode
• AC signal level display driving circuits
• DC/AC motor speed control circuits
• Alarm sound generator circuits

Procurement Notes

The TS555CDT is listed as End-of-Life (EOL) or discontinued by the manufacturer. Availability is restricted, and distributors may not stock this specific part number. Verification of current lifecycle status and potential obsolescence is required before procurement planning.

Selection Notes

Select the TS555CDT when a low-power CMOS replacement for the NE555 is needed in surface-mount designs. Ensure the application operates within the 0°C to +70°C temperature range. Verify that the required timing accuracy and frequency stability meet the 75 ppm/°C specification. Consider the SOIC-8 package dimensions (5 x 4 x 1.25 mm) for PCB layout constraints.

Part Context

The TS555CDT belongs to the TS555 family of single-channel CMOS timers. It shares functional compatibility with the broader 555 timer lineage but utilizes CMOS technology to significantly reduce power consumption and increase maximum operating frequency compared to bipolar counterparts. The 'CD' suffix typically denotes the commercial temperature grade and SOIC package type.

Replacement Considerations

The TS555CDT is functionally pin-compatible with the NE555. Other variants in the same family, such as TS555IDT or TS555CN, offer similar functionality with different temperature ranges or packaging options.