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PDF DM74LS299 Data sheet ( Hoja de datos )
| Número de pieza | DM74LS299 | |
| Descripción | 8-Input Universal Shift/Storage Register | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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October 1988
Revised March 2000
DM74LS299
8-Input Universal Shift/Storage Register with
Common Parallel I/O Pins
General Description
The DM74LS299 is an 8-bit universal shift/storage register
with 3-STATE outputs. Four modes of operation are possi-
ble: hold (store), shift left, shift right and load data. The par-
allel load inputs and flip-flop outputs are multiplexed to
reduce the total number of package pins. Separate outputs
are provided for flip-flops Q0 and Q7 to allow easy cascad-
ing. A separate active LOW Master Reset is used to reset
the register.
Features
s Common I/O for reduced pin count
s Four operation modes: shift left, shift right, load and
store
s Separate shift right serial input and shift left serial input
for easy cascading
s 3-STATE outputs for bus oriented applications
Ordering Code:
Order Number Package Number
Package Description
DM74LS299WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74LS299N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
VCC = Pin 20
GND = Pin 10
Pin Descriptions
Pin
Names
Description
CP Clock Pulse Input (Active Rising Edge)
DS0
DS7
S0, S1
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
MR Asynchronous Master Reset Input (Active LOW)
OE1, OE2 3-STATE Output Enable Inputs (Active LOW)
I/O0–I/O7 Parallel Data Inputs or 3-STATE Parallel Outputs
Q0–Q7 Serial Outputs
© 2000 Fairchild Semiconductor Corporation DS009827
www.fairchildsemi.com
1 page  
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DM74LS299.PDF ] | |
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