描述 Description

The UTC CD4541 programmable timer comprise a 16-stage binary counter, an integrated oscillator for use with an external capacitor and two resistors, output control logic, and a special power-on reset circuit. The counter divides the oscillator frequency by any of 4 digitally controlled division ratios.

特性 Features

? Operates at 2?frequency divider or as single transition timer
? Increments on positive edge clock transitions
? Wide supply voltage range: 3.0V ~ 15V
? Built-in low power RC oscillator??
? Oscillator frequency range ~ DC to 100 kHz
? External clock applied to Pin 3 can be used instead of oscillator
? Available division ratios 28, 210, 213, or 216
? High noise immunity: 0.45 VDD (typ.)
? Master reset totally independent of automatic reset operation
? Automatic reset initializes all counters when power turns on
? Q/Q select provides output logic level flexibility
? High output drive min. one TTL load
? Maximum input leakage 1μA at 15V over full temperature range