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MC74AC299 Datasheet(PDF) 1 Page - ON Semiconductor

Part No. MC74AC299
Description  8−Input Universal Shift/Storage Register with Common Parallel I/O Pins
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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MC74AC299 Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2006
June, 2006 − Rev. 8
1
Publication Order Number:
MC74AC299/D
MC74AC299, MC74ACT299
8−Input Universal Shift/
Storage Register with
Common Parallel I/O 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
w These devices are available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
Figure 1. Pinout: 20−Lead Packages Conductors
(Top View)
19
20
18
17
16
15
14
2
1
34567
VCC
13
8
12
9
11
10
S1
DS7
Q7
I/O7 I/O5 I/O3 I/O1
CP
DS0
S0
OE1 OE2 I/O6 I/O4 I/O2 I/O0
Q0
MR
GND
PIN ASSIGNMENT
PIN
FUNCTION
CP
Clock Pulse Input
DS0
Serial Data Input for Right Shift
DS7
Serial Data Input for Left Shift
S0, S1
Mode Select Inputs
MR
Asynchronous Master Reset
OE1, OE2
3−State Output Enable Inputs
I/O0−I/O7
Parallel Data Inputs or 3−State Parallel Outputs
Q0, Q7
Serial Outputs
1
20
PDIP−20
N SUFFIX
CASE 738
1
20
SO−20
DW SUFFIX
CASE 751
Device
Package
Shipping
ORDERING INFORMATION
MC74AC299N
PDIP−20
18 Units/Rail
MC74ACT299N
PDIP−20
18 Units/Rail
MC74AC299DW
SOIC−20
38 Units/Rail
MC74AC299DWR2
SOIC−20
1000 Tape & Reel
MC74ACT299DW
SOIC−20
38 Units/Rail
MC74ACT299DWR2
SOIC−20
1000 Tape & Reel
See general marking information in the device marking
section on page 9 of this data sheet.
DEVICE MARKING INFORMATION
http://onsemi.com


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