HD74HC194 Datasheet, PDF (3/9 Pages) Hitachi Semiconductor – 4-bit Bidirectional Universal Shift Register

HD74HC194
Timing Diagram
Clock
Mode S0
Control
Inputs S1
Clear
Serial
R
Data
Inputs L
AH
Parallel B L
Data
Inputs C H
DL
QA
QB
Outputs
QC
QD
Clear Load
Shift Right
Logic Diagram
S0
Serial
Shift
Left
D
Shift Left
Inhibit
Clear
Serial
Shift
C
B
A
Right
S1
Clock
Clear
D
C
CQ
CL CL
D
C
CQ
CL CL
D
C
CQ
CL CL
D
C
CQ
CL CL
QD
QC
QB
QA
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage range
V_CC
–0.5 to 7.0
V
Input / Output voltage
V_IN, V_OUT
–0.5 to V_CC +0.5
V
Input / Output diode current
I_IK, I_OK
±20
mA
Output current
I_O
±25
mA
V_CC, GND current
I_CC or I_GND
±50
mA
Power dissipation
Storage temperature
P_T
500
mW
Tstg
–65 to +150
°C
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
Rev.2.00 Jan 31, 2006 page 3 of 8