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DM74LS299N Datasheet

  • DM74LS299N

  • 8-Input Universal Shift/Storage Register with

  • FAIRCHILD

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DM74LS299 8-Input Universal Shift/Storage Register with Common Parallel I/O Pins
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
DM74LS299WM
DM74LS299N
Package Number
M20B
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
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 鈥淴鈥?to the ordering code.
Logic Symbol
Connection Diagram
V
CC
=
Pin 20
GND
=
Pin 10
Pin Descriptions
Pin
Names
CP
D
S0
D
S7
S0, S1
MR
Description
Clock Pulse Input (Active Rising Edge)
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
Asynchronous Master Reset Input (Active LOW)
OE1, OE2 3-STATE Output Enable Inputs (Active LOW)
I/O0鈥揑/O7 Parallel Data Inputs or 3-STATE Parallel Outputs
Q0鈥換7
Serial Outputs
漏 2000 Fairchild Semiconductor Corporation
DS009827
www.fairchildsemi.com

DM74LS299N 產(chǎn)品屬性

  • Fairchild Semiconductor

  • Serial/Parallel to Serial/Parallel

  • 8

  • DIP-20

  • 74LS

  • Bipolar

  • 8

  • 3-State

  • 35 ns

  • + 70 C

  • 0 C

  • Rail

  • Shift Register

  • Through Hole

  • 3

  • 4.75 V to 5.25 V

  • 5.25 V

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