TLC556MD

Overview

The TLC556MD is a dual CMOS timer integrated circuit manufactured by Texas Instruments, belonging to the LinCMOS family. It integrates two independent 555-type timers within a single 14-pin SOIC package. The device operates on a supply voltage range of 2 V to 15 V and supports a maximum frequency of 2.1 MHz. It features CMOS, MOS, and TTL-compatible outputs with a high-level output current capability of 100 mA. The component is rated for an extended industrial temperature range from -55 °C to +125 °C.

Feature Summary

• Dual timer configuration integrating two independent 555-type oscillators in one package
• Wide operating supply voltage range from 2 V to 15 V
• High drive capability with 100 mA high-level output current
• Extended temperature rating suitable for harsh environments (-55 °C to +125 °C)

Applications

• Precision timing circuits requiring dual channels
• Pulse width modulation (PWM) generation
• Sequential timing events
• Time delay functions

Procurement Notes

Verify the specific suffix 'MD' against the manufacturer's official datasheet to confirm the exact package dimensions and material specifications. Ensure that the 2 V minimum supply voltage requirement aligns with the target system design, as this differs from standard bipolar 556 variants which typically require higher voltages.

Selection Notes

Select the TLC556MD when low power consumption and wide voltage operation are required compared to standard bipolar timers. The SOIC-14 surface-mount package is suitable for automated assembly processes. Confirm that the 2.1 MHz maximum frequency meets the application's timing requirements, as some legacy alternatives may offer different speed characteristics.

Part Context

The TLC556MD is part of Texas Instruments' LinCMOS technology line, designed to combine the low power consumption of CMOS with the drive capabilities of bipolar circuits. It serves as a modern replacement for older bipolar dual timers like the NE556 or LM556, offering improved performance in low-voltage applications while maintaining pin compatibility.