74HC237 Datasheet, PDF (7/9 Pages) NXP Semiconductors – 3-to-8 line decoder/demultiplexer with address latches

Philips Semiconductors
3-to-8 line decoder/demultiplexer with
address latches
Product specification
74HC/HCT237
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given in the family specifications.
To determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
A_n
E₁
E₂
LE
UNIT LOAD COEFFICIENT
1.50
1.50
1.50
1.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
min.
+25
typ. max.
74HCT
−40 to +85
min. max.
−40 to +125
min. max.
UNIT _VCC
(V)
WAVEFORMS
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_THL/ t_TLH
propagation delay
A_n to Y_n
propagation delay
LE to Y_n
propagation delay
E₁ to Y_n
propagation delay
E₂ to Y_n
output transition time
22 38
48
57 ns 4.5 Fig.6
25 42
53
63 ns 4.5 Fig.7
20 35
44
53 ns 4.5 Fig.7
20 33
41
50 ns 4.5 Fig.6
7 15
19
22 ns 4.5 Fig.6
t_W
LE pulse width
HIGH
t_su
set-up time
A_n to LE
t_h
hold time
A_n to LE
10 5
10 2
50
13
15
13
15
5
5
ns 4.5 Fig.8
ns 4.5 Fig.8
ns 4.5 Fig.8
December 1990
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