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HCF4543BM1 Datasheet

  • HCF4543BM1

  • BCD-TO-7 SEGMENT LATCH/DECODER/LCD DRIVER

  • 12頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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HCC/HCF4543B
HCC4543B
HCF4543B
BCD-TO-7 SEGMENT LATCH/DECODER/LCD DRIVER
DISPLAY BLANKING OF ALL ILLEGAL INPUT
COMBINATIONS
LATCH STORAGE OF CODE
CAPABILITY OF DRIVING TWO LOW POWER
TTL LOADS, TWO HTL LOADS, OR ONE LOW
POWER SCHOTTKY LOAD OVER THE FULL
RATED-TEMPERATURE RANGE
PIN-FOR-PIN REPLACEMENT FOR THE
HCF4056B (with pin 7 tied to V
SS
)
DIRECT LED DRIVING CAPABILITY
100% TESTED FOR QUIESCENT CURRENT
AT 20V
MAXIMUM INPUT CURRENT OF 1A AT 18V
OVER FULL PACKAGE-TEMPERATURE
RANGE ; 100nA AT 18V AND 25擄C
NOISE MARGIN (full package-temperature
range) = 1V AT V
DD
= 5V
2V AT V
DD
= 10V
2.5V AT V
DD
= 15V
5-V, 10-V, AND 15-V PARAMETRIC RATINGS
Applications :
INSTRUMENT DISPLAY DRIVER
DASHBOARD DISPLAY DRIVER
COMPUTER/CALCULATOR DISPLAY DRIVER
TIMING DEVICE DRIVER (clocks, watches,
timers)
DESCRIPTION
The HCC/HCF4543B is a BCD-to-seven segment
latch/decoder/driver designed primarily for liquid-
crystal display (LCD) applications. It is also capable
of driving light emitting diode (LED), incandescent,
gas-discharge, and fluorescent displays. This de-
vice is functionally similar to and serves as direct re-
placement for the HCF4056B when pin 7 is
connected to V
SS
. It differs from the HCF4056B in
that it has a display blanking capability instead of a
level-shifting function and requires only one power
supply. When the HCF4056B is used in the level
shifting mode, two power supplies are required.
When the HCF4543B is used for LCD applications,
a square wave must be applied to the PHASE input
and the backplane of the LCD device. For LED ap-
plications a logic 1 is required at the PHASE input
for common-cathode devices ; a logic 0 is required
for common-anode devices (see truth table).
December 1989
1/12
EY
(Plastic Package)
F
(Ceramic Frit Seal Package)
M1
C1
(Micro Package)
(Plastic Chip Carrier)
ORDER CODES :
HCC4543 BF
HCF4543 BM1
HCF4543 BEY
HCF4543 BC1
PIN CONNECTION
(top view)

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