HD74LS194A Datasheet, PDF (3/8 Pages) Hitachi Semiconductor – 4-bit Bidirectional Universal Shift Registers

HD74LS194A
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
V_CC
7
V
Input voltage
V_IN
7
V
Power dissipation
P_T
400
mW
Storage temperature
Tstg
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Clock frequency
Clock pulse width
Clear pulse width
Mode Control
Setup time
A, B, C, D, R, L
CLR
(inactive state)
Hold time
Symbol
V_CC
I_OH
I_OL
T_opr
ƒ_clock
t_{w (CK)}
t_{w (CLR)}
t_su
t_h
Min
4.75
—
—
–20
0
20
20
30
20
25
0
Typ
5.00
—
—
25
—
—
—
—
—
—
—
Max
5.25
–400
8
75
25
—
—
—
—
—
—
Unit
V
µA
mA
°C
MHz
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
—
15
23
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, inputs A through D grounded, and 4.5 V applied to S₀, S₁, clear and the serial inputs,
I_CC is tested with a momentary GND, then 4.5 V, applied to clock.
Switching Characteristics
Item
Maximum clock frequency
Propagation delay time
Symbol
ƒ_max
t_PHL
t_PLH
t_PHL
Inputs
Clear
Clock
Clock
(V_CC = 5 V, Ta = 25°C)
Outputs min. typ. max. Unit Condition
25
36
—
MHz
—
19
30
ns C_L = 15 pF,
Q
—
14
22
ns ^RL ^{= 2 kΩ}
—
17
26
ns
Rev.3.00, Jul.15.2005, page 3 of 7