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74HC195 Datasheet, PDF (7/9 Pages) NXP Semiconductors – 4-bit parallel access shift register | |||
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Philips Semiconductors
4-bit parallel access shift register
Product speciï¬cation
74HC/HCT195
DC CHARACTERISTICS FOR HCT
For the DC characteristics see â74HC/HCT/HCU/HCMOS Logic Family Specificationsâ.
Output capability: standard
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (âICC) for a unit load of 1 is given in the family specifications.
To determine âICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
PE
all others
UNIT LOAD COEFFICIENT
0.65
0.35
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
SYMBOL PARAMETER
tPHL/ tPLH
tPHL
tTHL/ tTLH
propagation delay
CP to Qn
propagation delay
MR to Qn
output transition time
Tamb (°C)
TEST CONDITIONS
74HCT
+25
â40 to +85
â40 to +125
UNIT
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
18 32
40
48 ns 4.5 Fig.6
17 35
44
53 ns 4.5 Fig.8
7 15
19
22 ns 4.5 Fig.6
tW
clock pulse width
HIGH or LOW
20 6
25
30
ns 4.5 Fig.6
tW
master reset pulse width 16 6
LOW
20
24
ns 4.5 Fig.8
trem
removal time
MR to CP
16 6
20
24
ns 4.5 Fig.8
tsu
set-up time
J, K, PE to CP
20 12
25
30
ns 4.5 Figs 8 and 9
tsu
set-up time
Dn to CP
16 6
20
24
ns 4.5 Figs 8 and 9
th
hold time
3 â5
3
3
ns 4.5 Figs 8 and 9
J, K, PE, Dn to CP
fmax
maximum clock pulse
27 52
22
18
MHz 4.5 Fig.6
frequency
December 1990
7
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