Texas Instruments CD4541B
The counter increments on positive-edge clock transitions and can also be reset via the MASTER RESET input. The desired stage is chosen using time-select inputs A and B (see Frequency Select Table).FEATURES
● Low Symmetrical Output Resistance, Typically 100Ω at VDD = 15V● Built-In Low-Power RC Oscillator
● Oscillator Frequency Range . . . . . . . . . . DC to 100kHz
● External Clock (Applied to Pin 3) can be Used Instead of Oscillator
● Operates as 2N Frequency Divider or as a SingleTransition Timer
● Q/Q Select Provides Output Logic Level Flexibility
● AUTO or MASTER RESET Disables Oscillator During Reset to Reduce Power Dissipation
● Operates With Very Slow Clock Rise and Fall Times
● Capable of Driving Six Low Power TTL Loads, Three Low-Power Schottky Loads, or Six HTL Loads Over the Rated Temperature Range
● Symmetrical Output Characteristics
● 100% Tested for Quiescent Current at 20V
● 5V, 10V, and 15V Parametric Ratings
● Meets All Requirements of JEDEC Standard No. 13B, “Standard Specifications for
DESCRIPTION
of ‘B’ Series CMOS Devices”DESCRIPTION
CD4541B programmable timer consists of a 16-stage binary counter, an oscillator that is controlled by external R-C components (2 resistors and a capacitor), an automatic power-on reset circuit, and output control logic.