74HC4543 Datasheet, PDF (9/11 Pages) NXP Semiconductors – BCD to 7-segment latch/decoder/driver for LCDs

Philips Semiconductors
BCD to 7-segment latch/decoder/driver for
LCDs
Product specification
74HC/HCT4543
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given here.
To determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
D₀, D₁, D₂
D₃
BI
LD
PH
1.00
0.50
0.50
1.50
1.25
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
74HCT
+25
−40 to +85
−40 to +125
UNIT
V_CC
(V)
min. typ. max. min. max. min. max.
OTHER
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_THL/ t_TLH
propagation delay
D_n to Q_n
propagation delay
LD to Q_n
propagation delay
BI to Q_n
propagation delay
PH to Q_n
output transition time
38 80
36 68
32 66
24 66
23 50
100
120 ns 4.5 Fig.12
85
102 ns 4.5 Fig.13
83
99 ns 4.5 Fig.14
83
99 ns 4.5
63
75 ns 4.5 Figs 12, 13 and 14
t_W
LD pulse width
10 4
HIGH or LOW
t_su
set-up time
D_n to LD
12 4
t_h
hold time
D_n to LD
82
13
15
ns 4.5 Fig.13
15
18
ns 4.5 Fig.15
10
12
ns 4.5 Fig.15
December 1990
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