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Numéro de référence | MC74AC299 | ||
Description | 8-Input Universal Shift/Storage Register with Common Parallel I/O Pins | ||
Fabricant | Motorola Semiconductors | ||
Logo | |||
1 Page
( 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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Pages | Pages 10 | ||
Télécharger | [ MC74AC299 ] |
No | Description détaillée | Fabricant |
MC74AC299 | 8-Input Universal Shift/ Storage Register with Common Parallel I/O Pins | ON Semiconductor |
MC74AC299 | 8-Input Universal Shift/Storage Register with Common Parallel I/O Pins | Motorola Semiconductors |
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