74HC7597 查看數據表（PDF） - Philips Electronics
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74HC7597 Datasheet PDF : 12 Pages
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Philips Semiconductors
8-bit shift register with input latches
Product specification
74HC/HCT7597
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
DS
Dn
PL, MR
LE, SHCP
0.25
0.40
1.50
1.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HCT
+25
−40 to +85
UNIT
−40 to +125
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLH
tPHL
tPHL/ tPLH
tPHL/ tPLH
tPHL/ tPLH
tTHL/ tTLH
propagation delay
SHCP to Q
propagation delay
MR to Q
propagation delay
LE to Q
propagation delay
PL to Q
propagation delay
D7 to Q
output transition time
20 35
44
53 ns 4.5 Fig.7
25 42
53
63 ns 4.5 Fig.7
31 53
66
80 ns 4.5 Fig.7
27 46
58
69 ns 4.5 Fig.7
28 49
61
74 ns 4.5 Fig.7
7 15
19
22 ns 4.5 Fig.7
tW
SHCP pulse width
16 6
20
24
ns 4.5 Fig.7
HIGH or LOW
tW
LE pulse width
LOW
16 7
20
24
ns 4.5 Fig.7
tW
MR pulse width
LOW
20 11
25
30
ns 4.5 Fig.7
tW
PL pulse width
LOW
18 9
23
27
ns 4.5 Fig.7
trem
removal time
MR to SHCP
10 −1
13
15
ns 4.5 Fig.7
trem
removal time
MR to PL
20 9
25
30
ns 4.5 Fig.7
December 1990
9
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