TLC556MDG4

Overview

The TLC556MDG4 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 2V to 15V and supports a maximum frequency of 2.1MHz. It features CMOS, MOS, and TTL-compatible outputs with a high-level output current capability of 100mA. The component is rated for an industrial temperature range from -55°C to +125°C.

Feature Summary

• Dual timer configuration integrating two independent 555-type oscillators in one package
• Wide supply voltage operation ranging from 2V to 15V
• High drive capability with 100mA high-level output current
• Extended industrial temperature rating from -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 'G4' against the manufacturer's latest documentation to confirm RoHS compliance status and current production lifecycle stage. Ensure the SOIC-14 package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when low power consumption and wide voltage tolerance are required compared to standard bipolar timers. The extended temperature range makes it suitable for harsh environments where standard commercial grade parts may fail. Verify that the 100mA output current meets the load requirements of the connected circuitry.

Part Context

This part is a green (RoHS compliant) version of the TLC556MD. It belongs to the broader TLC556 series which offers improved performance over legacy NE556 counterparts, specifically regarding lower power consumption and wider operating voltage ranges while maintaining pin compatibility.

Replacement Considerations

The TLC556IDR serves as a similar industrial-grade alternative but typically specifies a -40°C to +85°C temperature range, which is narrower than the TLC556MDG4's -55°C to +125°C specification. Direct substitution requires verifying thermal constraints.