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HD74HC299
8-bit Universal Shift/Storage Register (with 3-state outputs)
Description
The HD74HC299 features multiplexed inputs/outputs to achieve full 8-bit data handling in a single 20-pin
package. Due to the large output drive capability and 3-state feature, this device is ideally suited for
interfacing with bus lines in a bus oriented system. Two function select inputs and two output control
inputs are used to choose the mode of operation as listed in the function table. Synchronous parallel
loading is accomplished by taking both function select lines S0 and S1 high. This places the 3-state outputs
in a high impedance state, which permits data applied to the input/output lines to be clocked into the
register. Reading out of the register can be done while the outputs are enabled in any mode. A direct
overriding clear input is provided to clear the register whether the outputs are enabled or disabled.
Features
• High Speed Operation
• 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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HD74HC299
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 X X X L L L L L L L L L L
L LXLLX 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
Notes: 1. a to h; the level of steady-state input at inputs A through H, respectively. These data are
2. Q
to QH0; the level of QA through QH, respectively, before the indicated steady-state input
A0
3. Q
to QHn; the level of QA through QH, respectively, before the most-recent transition of the
An
4. † = ; When one or both output controls are high the eight input/output terminals are desabled to
the high-impedance state, however, sequential operation or clearing of the register is not
affected.
5. When clear is low, outputs of Q
Output
Control Serial Inputs/Outputs Outputs
loaded into the flip-flop outputs are isolated from the input/output terminals.
conditions were established.
clock.
’ and QH’ are low, in spite of other inputs.
A
H0
H0
Gn
Gn
2
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Pin Arrangement
Output
controls
G/Q
E/Q
S
G1
G
HD74HC299
1
1
0
S
0
2
2
G
3
3
2
4
4
C
5
5
E
G/Q
E/Q
S
1
SL
Q
H
G
H/Q
H
E
20
19
18
17
16
V
CC
S1
Shift left
SL
Q
H
H/Q
H
C/Q
A/Q
Q
Clear
GND
F/Q
6
6
C
7
7
A
8
8
A
9
9
10
10
C/Q
A/Q
Q
A
Clear
F
C
D/Q
D
A
B/Q
B
CK
SR
15
14
13
12
11
F/Q
F
D/Q
D
B/Q
B
Clock
Shift right
SR
(Top view)
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
–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
3
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HD74HC299
Block Diagram
Sift
right
serial-input
S
1
S
0
Sift
left
serial-input
Clear
Clock
D
CC CLR
G
2
G
1
Q
A
D
Q
CC CLR
A Q
A
D
Q
CC CLR
B Q
B
D
Q
CC CLR
C Q
C
D
Q
CC CLR
D Q
D
D
Q
CC CLR
E Q
E
D
Q
CC CLR
F Q
F
D
Q
Q
CC CLR
G Q
G
H Q
Q
H
H
4
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HD74HC299
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’ & QH’IOH = –4 mA
6.0 5.68 — — 5.63 — Outputs IOH = –5.2 mA
4.5 4.18 — — 4.13 — A/QA thru IOH = –6 mA
6.0 5.68 — — 5.63 — H/QH Outputs IOH = –7.8 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’ & QH’IOH = 4 mA
6.0 — — 0.26 — 0.33 Outputs IOH = 5.2 mA
4.5 — — 0.26 — 0.33 A/QA thru IOH = 6 mA
6.0 — — 0.26 — 0.33 H/QH Outputs IOH = 7.8 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
or GND
CC
5
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HD74HC299
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 — — 25 — 20
6.0 — — 29 — 23
Propagation delay t
time t
PLH
PHL
2.0 — — 190 — 240 ns Clock to QA’ or QH’
4.5 — — 38 — 48
6.0 — — 32 — 41
t
PHL
2.0 — — 220 — 275 ns Clear to QA’ or QH’
4.5 — — 44 — 55
6.0 — — 37 — 47
t
PLH
t
PHL
2.0 — — 190 — 240 ns Clock to QA – Q
4.5 — — 38 — 48
6.0 — — 32 — 41
t
PHL
2.0 — — 220 — 275 ns Clear to QA – Q
4.5 — — 44 — 55
6.0 — — 37 — 47
Output enable t
time t
ZH
ZL
2.0 — — 160 — 200 ns
4.5 — — 32 — 40
6.0 — — 27 — 34
Output disable t
time t
HZ
LZ
2.0 — — 160 — 200 ns
4.5 — — 32 — 40
6.0 — — 27 — 34
Setup time t
su
2.0 100 — — 125 — ns Select
4.5 20 — — 25 —
6.0 17 — — 21 —
Hold time t
h
2.0 5 — — 5 — ns Select
4.5 5 — — 5 —
6.0 5 — — 5 —
Removal time t
rem
2.0 50 — — 65 — ns Clear
4.5 10 — — 13 —
6.0 9 — — 11 —
Pulse width t
w
2.0 80 — — 100 — ns
4.5 16 — — 20 —
6.0 14 — — 17 —
+85°C
H
H
6
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AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont)
Ta = –40 to
Ta = 25°C
Item Symbol V
Output rise/fall t
time t
TLH
THL
(V) Min Typ Max Min Max Unit Test Conditions
CC
2.0 — — 60 — 75 ns A/QA thru H/QH outputs
4.5 — — 12 — 15
6.0 — — 10 — 13
2.0 — — 75 — 95 ns QA’ & QH’ outputs
4.5 — — 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
+85°C
HD74HC299
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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
Page 10
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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Cautions
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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
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
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products.
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