CD74HC4543
Data sheet acquired from Harris Semiconductor
SCHS217B
February 1998 - Revised July 2003
High-Speed CMOS Logic BCD to 7-Segment
Latch/Decoder/Driver for LCDs
[ /Title
(CD74
HC454
3)
/Sub-
ject
(High-
Speed
CMOS
Logic
BCD-
to-7
Features
Description
• Input Latches for BCD Code Storage
• Blanking Capability
• Phase Input for Complementing Outputs
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
The CD74HC4543 high-speed silicon-gate device is a BCD
to 7-segment latch/decoder/driver designed primarily for
directly driving liquid-crystal displays. It has an active-high
disable input (LD), an active-high blanking input (BI) and a
phase input (PH) to which a square wave is applied for
liquid-crystal applications. This square wave also is applied
to the backplane of the liquid-crystal display.
This device also can be used, in conjunction with current
amplifying devices, for driving LEDs, incandescent,
fluorescent, and gas-discharge displays. For these
applications the phase input provides a means to obtain
active-high or active-low segment outputs. (See the Function
Table.)
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
Ordering Information
PART NUMBER
CD74HC4543E
TEMP. RANGE
(oC)
-55 to 125
PACKAGE
16 Ld PDIP
Pinout
CD74HC4543
(PDIP)
TOP VIEW
LD 1
D2 2
BCD
INPUTS
D1 3
D3 4
D0 5
PH 6
BI 7
GND 8
16 VCC
15 f
14 g
13 e
12 d
11 c
7-SEGMENT
OUTPUTS
10 b
9a
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
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