M54HC4543 Datasheet, PDF (1/12 Pages) STMicroelectronics – BCD TO 7 SEGMENT LATCH/DECODER/LCD DRIVER

M54HC4543
M74HC4543
BCD TO 7 SEGMENT LATCH/DECODER/LCD DRIVER
. HIGH SPEED
tW = 7 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
I_CC = 4 µA (MAX.) AT T_A = 25 °C
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
t_PLH = t_PHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 4543B
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HC4543F1R M74HC4543M1R
M74HC4543B1R M74HC4543C1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC4543 is a high speed CMOS BCD-
TO-7 SEGMENT DECODER WITH LCD DRIVER
fabricated in silicon gate C²MOS technology. High
speed latch and decode operation 120 times as fast
as standard CMOS 4511B while CMOS low power
consumption in maintained. This device consist of
BCD-TO-7 segment decoder with a BCD input latch
and a 7-segment driver for a liquid crystal display
(LCD). When any illegal BCD input signal is applied
or input BI is held high, the display is blanked. When
driving LCDs, a common square wave signal should
be applied not only to the PH input of this device but
also to the electrically common backplane of the dis-
play. For other types of readouts, such as light-emit-
ting diode (LED), some additional drivers, such as
a transistor array is required. All inputs are equipped
with protection circuits against static discharge and
transient excess voltage.
NC =
No Internal
Connection
February 1993
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