Page 1
HD74HC4543
BCD-to-Seven Segment Latch/Decoder/Driver
Description
This circuit contains a 4-bit latch, BCD-to-7 segment decoder, and 7 outpt drivers. Data on the input pins
flow through to the output when the Latch Disable (LE) is high and is latched on the high to low transition
of the LE input. The Phase input (Ph) controls the polarity of the 7 segment outputs. when Ph is low the
outputs are true 7 segment, and when Ph is high the outputs are inverted 7 segment. When the Phase input
is driven by a liquid crystal display (LCD) backplane waveform the segment pins output the correct
segment waveform for proper LCD AC drive voltages.
In addition a Blanking input (BI) is provided, which will blank the display.
Features
• High Speed Operation: tpd (A, B, C, D to a – g) = 33 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Page 2
HD74HC4543
Function Table
Inputs Outputs
1
LD BI Ph*
X H L X X X X L L L L L L L Blank
HLLLLLLHHHHHHL0
HLLLLLHLHHLLLL1
HLLLLHLHHLHHLH2
H L LLL HHHHHHLLH3
HLLLHLLLHHLLHH4
HLLLHLHHLHHLHH5
H L LLHHLHL HHHHH6
H L LLHHHHHHL LLL 7
H L LHL LLHHHHHHH8
H L LHL LHHHHHLHH9
H L L H L H L L L L L L L L Blank
H L L H L H H L L L L L L L Blank
H L L H H L L L L L L L L L Blank
H L L H H L H L L L L L L L Blank
H L L H H H L L L L L L L L Blank
H L L H H H H L L L L L L L Blank
L LLXXXX*
Notes: 1. For liquid crystal readouts, apply a square wave to Ph.
For common cathode LED readouts, select Ph = L. For common anode LED readouts, select
Ph = H
2. Depends upon the BCD coder previously applied when LD = H
D C B A a b c d e f g Display
2
1
*
a
fg
b
e
c
d
2
Page 3
Pin Arrangement
HD74HC4543
Latch
Disable
Phase
Blanking
GND
1
2
C
3
B
4
D
5
A
6
7
8
LD
C
B
D
A
Ph
Bl
(Top view)
f
g
e
d
c
b
a
16
15
14
13
12
11
10
V
CC
f
g
e
d
c
b
a
9
3
Page 4
HD74HC4543
Logic Diagram
Phase
Blanking
A
IN
Q
a
LD
B
IN
LD
C
IN
LD
IN
D
LD
Q
Q
Q
Q
Q
Q
Q
b
c
d
e
f
g
Latch
Disable
4
Page 5
HD74HC4543
DC Characteristics
Ta = –40 to
Ta = 25°C
Item Symbol V
Input voltage V
IH
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 1.5 — — 1.5 — V
4.5 3.15 — — 3.15 —
6.0 4.2 — — 4.2 —
V
IL
2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
Output voltage V
OH
2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 — IOH = –4 mA
6.0 5.68 — — 5.63 — IOH = –5.2 mA
V
OL
2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33 IOL = 4 mA
6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply
I
CC
6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
current
+85°C
5
Page 6
HD74HC4543
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = –40 to
Ta = 25°C
Item Symbol V
Propagation delay t
time t
PLH
PHL
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 — — 400 — 500 ns A, B, C or D to a – g
4.5 — 33 80 — 100
6.0 — — 68 — 86
t
PLH
t
PHL
2.0 — — 300 — 380 ns Blanking to a – g
4.5 — 22 60 — 76
6.0 — — 52 — 66
t
PLH
t
PHL
2.0 — — 300 — 380 ns Phase to a – g
4.5 — 18 60 — 76
6.0 — — 52 — 66
t
PLH
t
PHL
2.0 — — 400 — 500 ns Latch Disable to a – g
4.5 — 35 80 — 100
6.0 — — 68 — 86
Pulse width t
w
2.0 80 — — 100 — ns
4.5 16 5 — 20 —
6.0 14 — — 17 —
Setup time t
su
2.0 100 — — 125 — ns
4.5 20 2 — 25 —
6.0 17 — — 21 —
Hold time t
h
2.0 50 — — 65 — ns
4.5 10 1 — 13 —
6.0 9 — — 11 —
Output rise/fall t
time t
TLH
THL
2.0 — — 75 — 95 ns
4.5 — 5 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
+85°C
6
Page 7
19.20
20.00 Max
16 9
1.3
Unit: mm
6.30
7.40 Max
81
1.11 Max
2.54 ± 0.25
0.48 ± 0.10
5.06 Max
2.54 Min
0.51 Min
Hitachi Code
JEDEC
EIAJ
Weight
7.62
+ 0.13
0.25
– 0.05
0° – 15°
(reference value)
DP-16
Conforms
Conforms
1.07 g
Page 8
16
Unit: mm
10.06
10.5 Max
9
5.5
1
0.80 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
8
0.12
0.10 ± 0.10
0.15
M
2.20 Max
7.80
0.20 ± 0.04
*0.22 ± 0.05
0.70 ± 0.20
Hitachi Code
JEDEC
EIAJ
(reference value)
Weight
+ 0.20
– 0.30
1.15
0° – 8°
FP-16DA
—
Conforms
0.24 g
Page 9
16
Unit: mm
9.9
10.3 Max
9
1
1.27
0.635 Max
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
8
0.25
+ 0.11
– 0.04
0.14
0.15
3.95
1.75 Max
M
6.10
1.08
0.20 ± 0.03
*0.22 ± 0.03
+ 0.67
0.60
– 0.20
Hitachi Code
JEDEC
EIAJ
Weight
+ 0.10
– 0.30
0° – 8°
(reference value)
FP-16DN
Conforms
Conforms
0.15 g
Page 10
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received the latest product standards or specifications before final design, purchase or use.
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contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
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failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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5. This product is not designed to be radiation resistant.
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products.
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