HCF40161B Datasheet, PDF (1/14 Pages) STMicroelectronics – SYNCHRONOUS PROGRAMMABLE 4-BIT BINARY COUNTER WITH ASYNCHRONOUS CLEAR

HCF40161B
SYNCHRONOUS PROGRAMMABLE 4-BIT BINARY
COUNTER WITH ASYNCHRONOUS CLEAR
s INTERNAL LOOK-AHEAD FOR FAST
COUNTING
s CARRY OUTPUT FOR CASCADING
s SYNCHRONOUSLY PROGRAMMABLE
s LOW-POWER TTL COMPATIBILITY
s STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS
s QUIESCENT CURRENT SPECIF. UP TO 20V
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
HCF40161B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
HCF40161B is a 4-bit synchronous programmable
counter. The CLEAR function is asynchronous. A
low level at the CLEAR input sets all four outputs
low regardless of the state of the CLOCK, LOAD
and ENABLE inputs. A low level at the LOAD
inputs disables the counter and causes the output
to agree with the set-up data after the following
CLOCK pulse regardless of the conditions of the
DIP
SOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
HCF40161BEY
HCF40161BM1
T&R
HCF40161M013TR
ENABLE inputs. The carry look-ahead circuitry
provides for cascading counter for n-bit
synchronous application without additional gating.
Counting is enabled when both the PE and TE
inputs are high. The TE input is fed forward to
enable COUT. This enable output produces a
positive output pulse with a duration
approximately equal to the positive portion of the
Q1 output. This positive overflow carry pulse can
be used to enable successive cascaded stages.
Logic transitions at the PE and TE inputs may
occur when the clock is either high or low.
PIN CONNECTION
September 2002
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