HCF4536B_02 Datasheet, PDF (1/13 Pages) STMicroelectronics – PROGRAMMABLE TIMER

HCF4536B
PROGRAMMABLE TIMER
s 24 FLIP-FLOP STAGES - COUNTS FROM 2⁰
TO 2²⁴
s LAST 16 STAGES SELECTABLE BY BCD
SELECT CODE
s GROUP SELECT INDICATES ONE OR
MORE PRIORITY INPUTS
s QUIESCENT CURRENT SPECIFIED UP TO
20V
s STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS
s 5V, 10V AND 15V PARAMETRIC RATINGS
s INPUT LEAKAGE CURRENT
I_I = 100nA (MAX) AT V_DD = 18V T_A = 25°C
s 100% TESTED FOR QUIESCENT CURRENT
s MEETS ALL REQUIREMENTS OF JEDEC
JESD13B "STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
DESCRIPTION
HCF4536B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP package.
HCF4536B is a programmable timer consisting of
24 ripple-binary counter stages. The salient
feature of this device is its flexibility. The device
can count from 1 to 2²⁴ or the first 8 stages can be
bypassed to allow an output, selectable by a 4-bit
code, from any one of the remaining 16 stages. It
DIP
ORDER CODES
PACKAGE
TUBE
DIP
HCF4536BEY
T&R
can be driven by an external clock or an RC
oscillator that can be constructed using on-chip
components. Input IN1 serves as either the
external clock input or the input to the on-chip RC
oscillator. OUT1 and OUT2 are connection
terminals for the external RC components. In
addition, an on-chip monostable circuit is provided
to allow a variable pulse width output. Various
timing functions can be achieved using
combinations of these capabilities. A logic "1" on
the 8-BYPASS input enables a bypass of the first
8 stages and makes stage 9 the first counter stage
of the last 16 stages. Selection of 1 of 16 outputs
is accomplished by the decoder and the BCD
inputs A, B, C, and D. MONO IN is the timing input
PIN CONNECTION
October 2002
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