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PDF MC74ACT299 Data sheet ( Hoja de datos )
| Número de pieza | MC74ACT299 | |
| Descripción | 8-Input Universal Shift/Storage Register with Common Parallel I/O Pins | |
| Fabricantes | Motorola Semiconductors | |
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( DataSheet : www.DataSheet4U.com )
MC74AC299
MC74ACT299
8ĆInput Universal
Shift/Storage Register
with Common Parallel I/0 Pins
The MC74AC299/74ACT299 is an 8-bit universal shift/storage register
with 3-state outputs. Four modes of operation are possible: hold (store), shift left,
shift right and load data. The parallel load inputs and flip-flop outputs are multiplexed
to reduce the total number of package pins. Additional outputs are provided for
flip-flops Q0, Q7 to allow easy serial cascading. A separate active LOW Master
Reset is used to reset the register.
• Common Parallel I/O for Reduced Pin Count
• Additional Serial Inputs and Outputs for Expansion
• Four Operating Modes: Shift Left, Shift Right, Load and Store
• 3-State Outputs for Bus-Oriented Applications
• Outputs Source/Sink 24 mA
• ′ACT299 Has TTL Compatible Inputs
VCC S1 DS7 Q7 I/O7 I/O5 I/O3 I/O1 CP DS0
20 19 18 17 16 15 14 13 12 11
8-INPUT UNIVERSAL
SHIFT/STORAGE REGISTER
WITH COMMON
PARALLEL I/O PINS
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
1 2 3 4 5 6 7 8 9 10
S0 OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0 MR GND
PIN NAMES
CP
DS0
DS7
S0, S1
MR
OE1, OE2
I/O0–I/O7
Q0, Q7
Clock Pulse Input
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
Asynchronous Master Reset
3-State Output Enable Inputs
Parallel Data Inputs or
3-State Parallel Outputs
Serial Outputs
LOGIC SYMBOL
S0 DS0
S1
CP
DS7
Q7
OE MR Q0 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7
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FACT DATA
5-1
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1 page  
MC74AC299 MC74ACT299
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
fmax
Maximum Input
Frequency
tPLH
Propagation Delay
CP to Q0 or Q7
tPHL
Propagation Delay
CP to Q0 or Q7
tPLH
Propagation Delay
CP to I/On
tPHL
Propagation Delay
CP to I/On
tPHL
Propagation Delay
MR to Q0 or Q7
tPHL
Propagation Delay
MR to I/On
tPZH
Output Enable Time
OE to I/On
tPZL
Output Enable Time
OE to I/On
tPHZ
Output Disable Time
OE to I/On
tPLZ
Output Disable Time
OE to I/On
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
Min Typ Max
3.3 90
5.0 130
3.3 8.5
5.0 5.5
20.5
14
3.3 8.5
5.0 5.5
3.3 9.0
5.0 6.0
21.5
14.5
20.5
14.5
3.3 10
5.0 6.5
3.3 9.0
5.0 5.5
3.3 9.0
5.0 5.5
3.3 7.0
5.0 4.5
3.3 7.0
5.0 5.0
23
16
22.5
15.5
21.5
15.0
18
12.5
18
12.5
3.3 6.5
5.0 3.5
3.3 5.5
5.0 3.5
18.5
14
17
12.5
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min Max
80
105
7.0 22
4.5 15
7.0 23
5.0 16
7.5 22.5
5.0 16
8.5 24.5
6.0 17.5
7.5 25.0
5.0 17.0
7.5 24.0
5.0 16.5
6.0 19.5
4.0 13.5
6.0 20.5
4.0 14
5.5 19.5
3.0 15
4.5 19
2.0 13.5
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Fig.
No.
3-3
3-6
3-6
3-6
3-6
3-6
3-6
3-7
3-8
3-7
3-8
FACT DATA
5-5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MC74ACT299.PDF ] | |
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