TLC555CPSR

Overview

The TLC555CPSR is a single standard timer manufactured by Texas Instruments using LinCMOS technology. It operates on a single power supply ranging from 2V to 15V with a maximum frequency of 2.1MHz. The device features low static current consumption, typically around 250µA, and provides high output drive capability with 100mA sink and 10mA source currents. Packaged in an 8-pin SOIC surface-mount format, it functions as a drop-in replacement for the NE555 while offering superior power efficiency and timing precision due to its high input impedance.

Feature Summary

• LinCMOS Technology: Low power consumption (approx. 250µA) compared to bipolar counterparts.
• Wide Voltage Range: Operates effectively between 2V and 15V single supplies.
• High Frequency: Supports oscillation frequencies up to 2.1MHz.
• Strong Output Drive: Capable of sinking 100mA and sourcing 10mA.
• Pin-Compatible: Functionally interchangeable with NE555 timers.

Applications

• Precision timing circuits and pulse generation.
• Time delay and sequential control systems.
• Pulse width modulation (PWM) controllers.
• Linear ramp generator applications.

Procurement Notes

Verify the suffix 'SR' indicates tape-and-reel packaging when ordering. Confirm the specific temperature grade (e.g., C for commercial 0°C to 70°C) matches the application requirements. Ensure ESD protection measures are observed during handling, as the device meets MIL-STD-883C standards exceeding 2000V.

Selection Notes

Select the TLC555CPSR for designs requiring lower quiescent current than bipolar 555 timers. The SOIC package suits surface-mount assembly processes. Consider the 2.1MHz limit for high-speed applications. Verify that the 100mA sink current meets load requirements, noting that sourcing current is limited to 10mA.

Part Context

This component belongs to the TLC555 family of CMOS timers. It shares the foundational architecture of the classic 555 timer but utilizes Texas Instruments' LinCMOS process to reduce power dissipation and allow for smaller external timing capacitors due to higher input impedance.

Replacement Considerations

The TLC555CPSR is functionally compatible with the NE555, LM555, and other standard 555 timers. When replacing bipolar versions, account for differences in output sourcing current and noise susceptibility. Other CMOS variants like LMC555 offer similar functionality.