M74HC323
8 BIT PIPO SHIFT REGISTER
WITH SYNCHRONOUS CLEAR
s
s
s
s
s
s
s
HIGH SPEED :
f
MAX
= 80MHz (TYP.) at V
CC
= 6V
LOW POWER DISSIPATION:
I
CC
=4µA(MAX.) at T
A
=25°C
HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 6mA (MIN) FOR QA’ TO QH’
|I
OH
| = I
OL
= 4mA (MIN) FOR QA TO QH
BALANCED PROPAGATION DELAYS:
t
PLH
≅
t
PHL
WIDE OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 323
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
DIP
SOP
TSSOP
TUBE
M74HC323B1R
M74HC323M1R
T&R
M74HC323RM13TR
M74HC323TTR
DESCRIPTION
The M74HC323 is an high speed CMOS 8 BIT
PIPO SHIFT REGISTER (3-STATE) fabricated
with silicon gate C
2
MOS technology.
This device has four modes (HOLD, SHIFT LEFT,
SHIFT RIGHT and LOAD DATA). Each mode is
chosen by two function select inputs (S0, S1).
When one or both enable inputs, (G1, G2) are
high, the eight input/output terminals are in the
high impedance state; however sequential
operation or clearing of the register is not affected.
Clear function on the M74HC323 is synchronous
to CLOCK.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/13
M74HC323
IINPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 19
2, 3
7, 13, 6, 14, 5, 15, 4, 16
8, 17
9
11
12
18
10
20
SYMBOL
S0, S1
G1, G2
A/QA to H/QH
QA’ to QH’
CLEAR
SR
CLOCK
SL
GND
V
CC
NAME AND FUNCTION
Mode Select Inputs
3-State Output Enable Inputs (Active LOW)
Parallel Data Inputs or 3-State Parallel Outputs (Bus Driver)
Serial Outputs (Standard Output)
Asynchronous Master Reset Input (Active LOW)
Serial Data Shift Right Input
Clock Input (LOW to HIGH, Edge-triggered)
Serial Data Shift Left Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
MODE
CLEAR
Z
CLEAR
HOLD
SHIFT
RIGHT
SHIFT
LEFT
LOAD
L
L
L
H
H
H
H
H
H
FUNCTION
SELECTED
S1
H
L
X
L
L
L
H
H
H
S0
H
X
L
L
H
H
L
L
H
OUTPUT
CONTROL
G1*
X
L
L
L
L
L
L
L
X
G2*
X
L
L
L
L
L
L
L
X
X
X
INPUTS/OUTPUTS
SERIAL
CLOCK
SL
X
X
X
X
X
X
H
L
X
SR
X
X
X
X
H
L
X
X
X
Z
L
L
QA0
H
L
QBn
QBn
a
Z
L
L
QH0
QGn
QGn
H
L
h
L
L
L
QA0
H
L
QBn
QBn
a
L
L
L
QH0
QGn
QGn
H
L
h
A/QA
H/QH
QA’
QH’
OUTPUTS
* When one or both output controls are high, the eight input/output terminals are in the high impedance state: however sequential operation
or cleaning of the register is not affected.
Z : High Impedance
Qn0 : The level of An before the indicated steady state input conditions were established.
Qnn : The level of Qn before the most recent active transition indicated by
OR
a, h : The level of the steady state inputs A, H, respectively.
X : Don’t Care
2/13
M74HC323
LOGIC DIAGRAM
3/13
M74HC323
TIMING CHART
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
O
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin (QA-QH)
DC Output Source Sink Current Per Output Pin (QA’-QH’)
Parameter
Value
-0.5 to +7
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±
20
±
20
±
35
±
235
±
70
500(*)
-65 to +150
300
Unit
V
V
V
mA
mA
mA
mA
mA
mW
°C
°C
I
CC
or I
GND
DC V
CC
or Ground Current
P
D
Power Dissipation
T
stg
T
L
Storage Temperature
Lead Temperature (10 sec)
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65
°
C; derate to 300mW by 10mW/
°
C from 65
°
C to 85
°
C
4/13
M74HC323
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
T
op
t
r
, t
f
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time
V
CC
= 2.0V
V
CC
= 4.5V
V
CC
= 6.0V
Parameter
Value
2 to 6
0 to V
CC
0 to V
CC
-55 to 125
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
°C
ns
ns
ns
DC SPECIFICATIONS
Test Condition
Symbol
Parameter
V
CC
(V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
QA to QH
QA’ to QH’
V
OL
Low Level Output
Voltage
4.5
6.0
4.5
6.0
2.0
4.5
6.0
QA to QH
QA’ to QH’
I
I
I
OZ
Input Leakage
Current
High Impedance
Output Leakage
Current
Quiescent Supply
Current
4.5
6.0
4.5
6.0
6.0
6.0
6.0
I
O
=-20
µA
I
O
=-20
µA
I
O
=-20
µA
I
O
=-6.0 mA
I
O
=-7.8 mA
I
O
=-4.0 mA
I
O
=-5.2 mA
I
O
=20
µA
I
O
=20
µA
I
O
=20
µA
I
O
=6.0 mA
I
O
=7.8 mA
I
O
=4.0 mA
I
O
=5.2 mA
V
I
= V
CC
or GND
V
I
= V
IH
or V
IL
V
O
= V
CC
or GND
V
I
= V
CC
or GND
T
A
= 25°C
Min.
1.5
3.15
4.2
0.5
1.35
1.8
1.9
4.4
5.9
4.18
5.68
4.18
5.68
2.0
4.5
6.0
4.31
5.8
4.31
5.8
0.0
0.0
0.0
0.17
0.18
0.17
0.18
0.1
0.1
0.1
0.26
0.26
0.26
0.26
±
0.1
±
0.5
4
1.9
4.4
5.9
4.13
5.63
4.13
5.63
0.1
0.1
0.1
0.33
0.33
0.33
0.33
±
1
±
5
40
Typ.
Max.
Value
-40 to 85°C
Min.
1.5
3.15
4.2
0.5
1.35
1.8
1.9
4.4
5.9
4.10
5.60
4.10
5.60
0.1
0.1
0.1
0.40
0.40
0.40
0.40
±
1
±
10
80
µA
µA
µA
V
V
Max.
-55 to 125°C
Min.
1.5
3.15
4.2
0.5
1.35
1.8
Max.
V
Unit
V
IH
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
V
IL
V
V
OH
I
CC
5/13
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