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1/10September 2002
■ 16 STAGE BINARY COUNTER
■ LOW SYMMETR. OUTPUT RESISTANCE,
TYPICALLY 100Ω at V
DD
= 15V
■ OSCILLATOR FREQUENCY RANGE :
DC to 100KHz
■ AUTO OR MASTER RESET DISABLES
OSCILLATOR DURING RESET TO REDUCE
POWER DISSIPATION
■ OPERATES WITH VERY SLOW CLOCK
RISE AND FALL TIMES
■ BUILT-IN LOW-POWER RC OSCILLATOR
■ EXTERNAL CLOCK (applied to pin 3) CAN
BE USED INSTEAD OF OSCILLATOR
■ OPERATES AS 2
n
FREQUENCY DIVIDER
OR AS A SINGLE-TRANSITION TIMER
■ Q/Q SELECT PROVIDES OUTPUT LOGIC
LEVEL FLEXIBILITY
■ CAPABLE OF DRIVING SIX LOW POWER
TTL LOADS, THREE LOW POWER
SCHOTTKY LOADS, OR SIX HTL LOADS
OVER THE RATED TEMP. RANGE
■ 5V, 10V AND 15V PARAMETRIC RATINGS
■ 100% TESTED FOR QUIESCENT CURRENT
AT 20V
■ MEETS ALL REQUIREMENTS OF JEDEC
JESD13B " STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
DESCRIPTION
The HCF4541B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
This device is composed of a 16-stages binary
counter, an oscillator controlled by 2 external
resistors and a capacitor, an output control logic
and an automatic power-on reset circuit. The
counter varies on positive-edge clock transition
and it can be cleared by the MASTER RESET
input. The output from this timer is the Q or Q
output from the 8th, 13th, or 16th counter stage.
The choice of the stage depends on the time
HCF4541B
PROGRAMMABLE TIMER
PIN CONNECTION
ORDER CODES
PACKAGE TUBE T & R
DIP HCF4541BEY
SOP HCF4541BM1 HCF4541M013TR
DIP SOP
