Page 1
HD74HC95
4-bit Parallel Access Shift Register
Description
This 4-bit register features parallel and serial inputs, parallel outputs, mode control, and two clock inputs.
The register has three mode operation:
• Parallel (broadside) load
• Shift right (the direction QA toward QD)
• Shift left (the direction QD toward QA)
Parallel loading is accomplished by applying the four bits of data and taking the mode conrol input high.
The data is loaded into the associated flip-flops and appears at the outputs after the high-to-low transition of
the clock-2 input. During loading, the entry of serial data is inhibited. Shift right is accomplished on the
high-to-low transition of clock-1 when the mode control is low; shift left is accomplished on the high-tolow transition of clock-2 when the mode control is high by connecting the output of each flip-flop (QD to
input C, etc.) and serial data is entered at input D. The clock input may be applied commonly to clock-1
and clock-2 if both modes can be clocked from the same source. Changes at the mode control input should
normally be made while both clock inputs are low: however, conditions described in the last three lines of
the function table will also ensure that register contents are protected.
Features
• High Speed Operation: tpd (Clock to Q) = 17 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 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)
Page 2
HD74HC95
Function Table
Inputs
Clocks Parallel Outputs
Mode Control 2 (L) 1 (R) Serial A B C D Q
H HXXXXXXQA0Q
H XXabcdabc d
H XXQB+Q
Q
C+
dQBnQ
D+
L LHXXXXXQA0Q
LXHXXXXHQAnQ
LXLXXXXLQAnQ
LLXXXXXQA0Q
LLXXXXXQA0Q
LHXXXXXQA0Q
HL XXXXXQA0Q
HHXXXXXQA0Q
Q
A
Q
B
Q
B0
Q
Cn
Q
B0
Q
B0
Q
B0
Q
B0
Q
B0
Q
B0
Q
C
C0
Dn
C0
Bn
Bn
C0
C0
C0
C0
C0
D
Q
D0
d
Q
D0
Q
Cn
Q
Cn
Q
D0
Q
D0
Q
D0
Q
D0
Q
D0
Pin Arrangement
Serial
Input
Inputs
Mode
Control
GND
1
Serial
Q
Input
A
QB
2
A
3
B
A
B
14
13
12
V
QA
QB
CC
Outputs
4
C
5
D
6
C
D
Mode
7
CK
CK
QC
QD
1
2
11
10
9
8
QC
QD
Clock1
R-Shift
Clock2
L-Shift
(Load)
(Top View)
2
Page 3
HD74HC95
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 — IOH = –4 mA
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 IOL = 4 mA
6.0 — — 0.26 — 0.33 IOL = 5.2 mA
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
3
Page 4
HD74HC95
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 — — 4 — 3 MHz
frequency 4.5 — — 20 — 16
6.0 — — 24 — 19
Propagation delay t
PLH
2.0 — — 145 — 180 ns
time 4.5 — 17 29 — 36
6.0 — — 25 — 31
t
PHL
2.0 — — 170 — 215 ns
4.5 — 17 34 — 43
6.0 — — 29 — 37
Pulse width t
w
2.0 80 — — 100 — ns Clock
4.5 16 6 — 20 —
6.0 14 — — 17 —
Setup time t
su
2.0 100 — — 125 — ns
4.5 20 2 — 25 —
6.0 17 — — 21 —
Hold time t
h
2.0 10 — — 10 — ns
4.5 10 –1 — 10 —
6.0 10 — — 10 —
Output rise/fall t
time t
TLH
THL
2.0 — — 75 — 95 ns
4.5 — 5 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
+85°C
4
Page 5
1
19.20
20.32 Max
1.30
Unit: mm
814
6.30
7.40 Max
7
2.54 ± 0.25
2.39 Max
0.48 ± 0.10
2.54 Min 5.06 Max
0.51 Min
Hitachi Code
JEDEC
EIAJ
Weight
7.62
+ 0.10
0.25
– 0.05
0° – 15°
(reference value)
DP-14
Conforms
Conforms
0.97 g
Page 6
14
1.27
10.5 Max
1
10.06
1.42 Max
Unit: mm
8
5.5
7
+ 0.20
7.80
– 0.30
2.20 Max
*0.22 ± 0.05
1.15
0.20 ± 0.04
0° – 8°
0.70 ± 0.20
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
0.12
0.10 ± 0.10
0.15
M
Hitachi Code
JEDEC
EIAJ
(reference value)
Weight
FP-14DA
—
Conforms
0.23 g
Page 7
9.05 Max
14
Unit: mm
8.65
8
*Pd plating
1
0.635 Max
1.27
*0.40 ± 0.06
7
+ 0.11
– 0.04
0.14
0.25
3.95
1.75 Max
0.15
M
6.10
1.08
*0.20 ± 0.05
+ 0.67
0.60
– 0.20
Hitachi Code
JEDEC
EIAJ
Weight
+ 0.10
– 0.30
0° – 8°
(reference value)
FP-14DN
Conforms
Conforms
0.13 g
Page 8
Cautions
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copyright, trademark, or other intellectual property rights for information contained in this document.
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intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
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
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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