HD74LS195A Datasheet, PDF (3/8 Pages) Hitachi Semiconductor – 4-bit Parallel-Access Shift Registers

HD74LS195A
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Clock frequency
Clock pulse width
Clear pulse width
Shift / load
Setup time
Serial and
parallel data
Clear
inactive-state
Release time
Hold time
Symbol
V_CC
I_OH
I_OL
T_opr
ƒ_clock
t_{w (CK)}
t_{su (CLR)}
t_su
t_release
t_h
Min
4.75
—
—
–20
0
16
12
25
15
25
—
0
Typ
Max
5.00
5.25
—
–400
—
8
25
75
—
30
—
—
—
—
—
—
—
—
—
—
—
5
—
—
Unit
V
µA
mA
°C
MHz
ns
ns
ns
ns
ns
ns
ns
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol
min.
typ.* max.
Unit
Condition
Input voltage
Output voltage
Input current
Short-circuit output
current
V_IH
2.0
—
—
V
V_IL
—
—
0.8
V
V_OH
2.7
—
—
V
V_CC = 4.75 V, V_IH = 2 V, V_IL = 0.8 V,
I_OH = –400 µA
V_OL
—
—
0.4
V
I_OL = 4 mA V_CC = 4.75 V, V_IH = 2 V,
—
—
0.5
I_OL = 8 mA ^VIL ^{= 0.8 V}
I_IH
—
—
20
µA V_CC = 5.25 V, V_I = 2.7 V
I_IL
—
—
–0.4
mA V_CC = 5.25 V, V_I = 0.4 V
I_I
—
—
0.1
mA V_CC = 5.25 V, V_I = 7 V
I_OS
–20
—
–100
mA V_CC = 5.25 V
Supply current**
I_CC
—
14
21
mA V_CC = 5.25 V
Input clamp voltage
V_IK
—
—
–1.5
V
V_CC = 4.75 V, I_IN = –18 mA
Notes: * V_CC = 5 V, Ta = 25°C
** With all outputs open, shift / load grounded, and 4.5 V applied to the J, K, and data inputs, I_CC is measured by
applying a momentary ground, followed by 4.5 V, to clear and then applying a momentary ground, followed
by 4.5 V, to clock.
Switching Characteristics
Item
Maximum clock frequency
Propagation delay time
Symbol
ƒ_max
t_PHL
t_PLH
t_PHL
Inputs
Clock
Clear
Clock
(V_CC = 5 V, Ta = 25°C)
Outputs min. typ. max. Unit Condition
Q_A to Q_D
30
39
—
MHz
Q_A to Q_D
—
19
30
ns C_L = 15 pF,
Q_A to Q_D
—
14
22
ns ^RL ^{= 2 kΩ}
Q_D
—
17
26
ns
Rev.3.00, Jul.15.2005, page 3 of 7