TLC555CDR

• Operating Frequency Up to 2.1 MHz
• Supply Range 2 V to 15 V
• One Timer channel, Single Output
• Maximum Power Dissipation 725 mW
• 8-Pin SOIC, 4.9 Mm X 3.91 Mm X 1.75 mm, Surface Mount
• 0 C to 70 C Commercial Temperature range, RoHS Compliant and Lead Free

The TLC555CDR is a low-power CMOS timer from Texas Instruments in an 8-pin SOIC package, operating from 2 V to 15 V and specified to 2.1 MHz. It is filed in the catalogue under real-time clocks, but the device is a general-purpose monostable and astable timer rather than a calendar-keeping RTC. A CMOS 555-type timer sets its output pulse width or oscillation frequency from one external resistor-capacitor network, so the same part serves as a one-shot, an oscillator or a pulse-width modulator depending only on the surrounding components. Maximum power dissipation is 725 mW over a 0 C to 70 C commercial temperature range.

CMOS timers are used for oscillators, delay and one-shot generation, pulse-width modulation, sequencing and simple missing-pulse detection in industrial controls, consumer electronics, lighting and test fixtures, and they remain common in service and repair of legacy boards. The CMOS process draws far less supply current than the original bipolar 555 and allows operation from lower rails, which is why it appears in battery-operated designs. Buyers span industrial OEMs, education and prototyping distributors, and repair operations. Note that the catalogue currently lists this timer under Real Time Clocks and records a Current Rating of 250 A, which is not a credible figure for an 8-pin SOIC timer and has been excluded here; both points are flagged for catalogue correction.