Page 1
HD74HC323
8-bit Universal Shift/Storage Register (with 3-state Outputs)
Description
This eight-bit universal register features multiplexed I/O ports to achieve full eight bit data handling in a
single 20-pin package. HD74HC323 applications are as stacked or push-down registers, buffer storage, and
accumulator registers.
Two function-select inputs and two output control inputs can be used to choose the modes of operation
listed in the function table.
Synchronous parallel loading is accomplished by taking both function-select lines S0 and S1 high. This
places the three-state outputs in a high-impedance state, which permits data that is applied on the I/O ports
to be clocked into the register. Reading out of this register can be accomplished while the outputs are
enabled in any mode. The clear function is synchronous, and a low level at the clear input clears the
register on the next low-to-high transition of the clock.
Features
• High Speed Operation: tpd (Clock to Q) = 20 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
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HD74HC323
(
)
Function Table
Inputs
Function
Select
Mode Clear S1S0G1† G2† Clock SLSRA/QAB/QBC/QCD/QDE/QEF/QFG/QGH/QHQA’QH’
Clear L X L L L XXLLLLLLLLLL
LLXLL XXLLLLLLLLLL
Hold H LLLLX XXQA0QB0QC0QD0QE0QF0QG0QH0QA0Q
H XXLL L XXQA0QB0QC0QD0QE0QF0QG0QH0QA0Q
Shift H L H L L XHH QAnQBnQCnQDnQEnQFnQGnHQ
Right H L H L L XLL QAnQBnQCnQDnQEnQFnQGnLQ
Shift H H L L L HXQBnQCnQDnQEnQFnQGnQHnHQBnH
Left H H L L L LXQBnQCnQDnQEnQFnQGnQHnLQBnL
Load H H H X X XXabcdef ghah
a ... h = the level of the steady-state input at A through H, respectively. These data are loaded into the flipflops while the flip-flop outputs are isolated from the input/output terminals.
Output
Control Serial Inputs/Outputs Outputs
H0
H0
Gn
Gn
Pin Arrangement
Output
controls
S
G1
G
G/Q
E/Q
C/Q
A/Q
QA'
Clear
GND
1
1
0
S
0
2
2
G
3
3
2
4
4
C
5
5
E
6
6
C
7
7
A
8
8
9
9
10
10
G/Q
E/Q
C/Q
A/Q
Q
A
Clear
S
1
SL
Q
H
C
H/Q
H
E
F/Q
F
C
D/Q
D
A
B/Q
B
CK
SR
20
19
18
17
16
15
14
13
12
11
V
CC
S1
Shift left
SL
'
Q
H
H/Q
H
F/Q
F
D/Q
D
B/Q
B
Clock
Shift right
SR
Top view
2
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HD74HC323
Absolute Maximum Ratings
Item Symbol Rating Unit
Supply voltage range V
Input voltage V
Output voltage V
Output current I
DC current drain per VCC, GND ICC, I
DC input diode current I
DC output diode current I
Power dissipation per package P
CC
IN
OUT
OUT
GND
IK
OK
T
Storage temperature Tstg –65 to +150 °C
Logic Diagram
–0.5 to +7.0 V
–0.5 to VCC + 0.5 V
–0.5 to VCC + 0.5 V
±35 mA
±75 mA
±20 mA
±20 mA
500 mW
QH'
CK
CKCKCK
CK CK
SL
H/Q
H
G/Q
G
F/Q
F
E/Q
E
D/Q
D
C/Q
C
B/Q
B
CK
CK CK
CK
A/Q
A
S
0
S
ClearSR Clock
1
QA'
G
G
2
1
3
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HD74HC323
DC Characteristics
Ta = –40 to
Ta = 25°C
Item Symbol V
Input voltage V
IH
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 1.5 — — 1.5 — V
4.5 3.15 — — 3.15 —
6.0 4.2 — — 4.2 —
V
IL
2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
Output voltage V
OH
2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 — QA to Q
6.0 5.68 — — 5.63 — IOH = –7.8 mA
4.5 4.18 — — 4.13 — QA’, QH’I
6.0 5.68 — — 5.63 — IOH = –5.2 mA
V
OL
2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33 QA to Q
6.0 — — 0.26 — 0.33 IOH = 7.8 mA
4.5 — — 0.26 — 0.33 QA’, QH’I
6.0 — — 0.26 — 0.33 IOH = 5.2 mA
Off-state output
I
OZ
6.0 — — ±0.5 — ±5.0 µA Vin = VIH or VIL,
current
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply
I
CC
6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
current
+85°C
Vout = V
H
H
or GND
CC
IOH = –6 mA
= –4 mA
OH
IOH = 6 mA
= 4 mA
OH
4
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AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = –40 to
Ta = 25°C
Item Symbol V
Maximum clock f
max
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 — — 5 — 4 MHz
frequency 4.5 — — 27 — 21
6.0 — — 31 — 24
Propagation delay t
time t
PLH
PHL
2.0 — — 150 — 190 ns Clock to QA’ or QH’
4.5 — 18 30 — 38
6.0 — — 26 — 33
2.0 — — 175 — 220 ns Clock to Q
4.5 — 20 35 — 44
6.0 — — 30 — 37
Output enable t
time t
ZH
ZL
2.0 — — 150 — 190 ns
4.5 — 14 30 — 38
6.0 — — 26 — 33
Output disable t
time t
HZ
LZ
2.0 — — 150 — 190 ns
4.5 — 15 30 — 38
6.0 — — 26 — 33
Output rise/fall t
time t
TLH
THL
2.0 — — 75 — 95 ns QA’, QH’
4.5 — 5 15 — 19
6.0 — — 13 — 16
2.0 — — 60 — 75 ns Q
4.5 — 4 12 — 15
6.0 — — 10 — 13
Input capacitance Cin — — 5 10 — 10 pF
+85°C
HD74HC323
5
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24.50
25.40 Max
Unit: mm
1120
6.30
1
0.89
1.27 Max
2.54 ± 0.25
1.30
10
0.48 ± 0.10
7.00 Max
0.51 Min
2.54 Min 5.08 Max
Hitachi Code
JEDEC
EIAJ
Weight
7.62
+ 0.11
0.25
– 0.05
0° – 15°
(reference value)
DP-20N
—
Conforms
1.26 g
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20
Unit: mm
12.6
13 Max
11
5.5
1
0.80 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
10
0.12
0.10 ± 0.10
0.15
M
2.20 Max
7.80
0.20 ± 0.04
*0.22 ± 0.05
0.70 ± 0.20
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
+ 0.20
– 0.30
1.15
0° – 8°
FP-20DA
—
Conforms
0.31 g
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20
Unit: mm
12.8
13.2 Max
11
7.50
1
0.935 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
10
0.12
0.20 ± 0.10
0.15
M
2.65 Max
10.40
0.25 ± 0.04
*0.27 ± 0.05
0.70
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
+ 0.25
– 0.40
1.45
+ 0.57
– 0.30
0° – 8°
FP-20DB
Conforms
—
0.52 g
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20 11
110
+0.08
*0.22
–0.07
0.20 ± 0.06
6.50
6.80 Max
0.65 Max
0.65
0.13
Unit: mm
4.40
1.0
M
6.40 ± 0.20
0.10
1.10 Max
*Dimension including the plating thickness
Base material dimension
0.15 ± 0.04
*0.17 ± 0.05
+0.03
–0.04
0.07
0° – 8°
Hitachi Code
JEDEC
EIAJ
(reference value)
Weight
0.50 ± 0.10
TTP-20DA
—
—
0.07 g
Page 10
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received the latest product standards or specifications before final design, purchase or use.
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contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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products.
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