74HC164; 74HCT164
Philips Semiconductors
8-bit serial-in, parallel-out shift register
Table 3:
Symbol
GND
CP
Pin description …continued
Pin
7
Description
ground (0 V)
8
clock input (LOW-to-HIGH, edge-triggered)
MR
9
master reset input (active LOW)
Q4
10
11
12
13
14
output
Q5
output
Q6
output
Q7
output
VCC
positive supply voltage
7. Functional description
7.1 Function selection
Table 4:
Function table[1]
Input
Operating
modes
Output
Q0
MR
L
CP
DSA
DSB
Q1 to Q7
L to L
Reset (clear)
Shift
X
↑
↑
↑
↑
X
l
X
l
L
L
L
L
H
H
q0 to q6
q0 to q6
q0 to q6
q0 to q6
H
l
h
l
H
h
h
H
h
[1] H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition
q = lower case letters indicate the state of the referenced input one set-up time prior to the LOW-to-HIGH
clock transition
↑ = LOW-to-HIGH clock transition
8. Limiting values
Table 5:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to
GND (ground = 0 V).
Symbol Parameter
Conditions
Min
Max Unit
VCC
IIK
supply voltage
−0.5 +7
V
input diode current
VI < −0.5 V or
VI > VCC + 0.5 V
-
-
±20
mA
IOK
output diode current
VO < −0.5 V or
±20
mA
VO > VCC + 0.5 V
IO
ICC, IGND VCC or GND current
Tstg storage temperature
output source or sink current VO = −0.5 V to VCC + 0.5 V
-
±25
±50
mA
mA
-
−65
+150 °C
9397 750 14693
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 4 April 2005
5 of 24
NXP [ NXP ]
