74hc4543 NXP Semiconductors, 74hc4543 Datasheet - Page 2

• Manufacturer Part Number: 74hc4543
• Description: Bcd To 7-segment Latch/decoder/driver For Lcds
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The 74HC/HCT4543 are high-speed Si-gate CMOS
devices and are pin compatible with “4543” of the “4000B”
series. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4543 are BCD to 7-segment
latch/decoder/drivers for liquid crystal displays. They have
QUICK REFERENCE DATA
GND = 0 V; T
Notes
1. C
2. For HC the condition is V
ORDERING INFORMATION
See
December 1990
t
C
C
SYMBOL
PHL
Latch storage of BCD inputs
Blanking inputs
Output capability: non-standard
I
BCD to 7-segment latch/decoder/driver
for LCDs
I
PD
CC
f
f
C
V
For HCT the condition is V
i
o
“74HC/HCT/HCU/HCMOS Logic Package Information”
/ t
CC
PD
L
category: MSI
= output frequency in MHz
= input frequency in MHz
(C
PLH
= output load capacitance in pF
P
= supply voltage in V
is used to determine the dynamic power dissipation (P
L
D
= C
V
propagation delay
input capacitance
power dissipation capacitance per package
amb
CC
D
LD to Q
BI to Q
PD
2
n
= 25 C; t
to Q
V
f
o
CC
) = sum of outputs
n
n
n
2
f
r
i
PARAMETER
= t
I
I
f
= GND to V
= GND to V
= 6 ns
(C
L
V
CC
2
CC
CC
f
o
1.5 V
) where:
C
notes 1 and 2
2
.
L
four address inputs (D
disable input (LD), an active HIGH blanking input (BI), an
active HIGH phase input (PH) and seven buffered
segment outputs (Q
The “4543” provides the function of a 4-bit storage latch
and an 8-4-2-1 BCD to 7-segment decoder driver. The
“4543” can invert the logic levels of the output combination.
The phase (PH), blanking (BI) and latch disable (LD)
inputs are used to reverse the function table phase, blank
the display and store a BCD code, respectively.
For liquid crystal displays a square-wave is applied to PH
and the electrical common back-plane of the display. The
outputs of the “4543” are directly connected to the
segments of the liquid crystal.
= 15 pF; V
D
in W):
CONDITIONS
CC
= 5 V
a
to Q
0
to D
g
29
32
20
3.5
42
).
3
), an active HIGH latch
HC
74HC/HCT4543
TYPICAL
Product specification
33
31
28
3.5
42
HCT
ns
ns
ns
pF
pF
UNIT