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PDF MC74AC299 Data sheet ( Hoja de datos )
| Número de pieza | MC74AC299 | |
| Descripción | 8-Input Universal Shift/ Storage Register with Common Parallel I/O Pins | |
| Fabricantes | ON Semiconductor | |
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( DataSheet : www.DataSheet4U.com )
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
VCC S1 DS7 Q7 I/O7 I/O5 I/O3 I/O1 CP DS0
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
S0 OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0 MR GND
Figure 1. Pinout: 20−Lead Packages Conductors
(Top View)
PIN ASSIGNMENT
PIN FUNCTION
CP Clock Pulse Input
DS0
DS7
S0, S1
MR
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
Asynchronous Master Reset
OE1, OE2
I/O0−I/O7
Q0, Q7
3−State Output Enable Inputs
Parallel Data Inputs or 3−State Parallel Outputs
Serial Outputs
http://onsemi.com
20
1
20
1
PDIP−20
N SUFFIX
CASE 738
SO−20
DW SUFFIX
CASE 751
ORDERING INFORMATION
Device
Package
Shipping
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
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 9 of this data sheet.
© Semiconductor Components Industries, LLC, 2003
www.DAaptrailS, h2e0e0t34U− .Rcoemv. 6
1
www.DataSheet4U.com
Publication Order Number:
MC74AC299/D
1 page  
MC74AC299, MC74ACT299
AC CHARACTERISTICS (For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74AC
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
TA = −40°C
to +85°C
CL = 50 pF
Min Max
Unit
Fig.
No.
Propagation Delay
tPLH
CP to I/On
Propagation Delay
tPHL
CP to I/On
Propagation Delay
tPHL
MR to Q0 or Q7
Propagation Delay
tPHL
MR to I/On
tPZH
Output Enable Time
OE to I/On
Output Enable Time
tPZL OE to I/On
tPHZ
Output Disable Time
OE to I/On
Output Disable Time
tPLZ 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.
3.3 9.0
5.0 6.0
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
3.3 6.5
5.0 3.5
3.3 5.5
5.0 3.5
− 20.5 7.5 22.5
− 14.5 5.0 16
− 23 8.5 24.5
− 16 6.0 17.5
− 22.5 7.5 25.0
− 15.5 5.0 17.0
− 21.5 7.5 24.0
− 15.0 5.0 16.5
− 18 6.0 19.5
− 12.5 4.0 13.5
− 18 6.0 20.5
− 12.5 4.0 14
− 18.5 5.5 19.5
− 14 3.0 15
− 17 4.5 19
− 12.5 2.0 13.5
ns
ns
ns
ns
ns
ns
ns
ns
3−6
3−6
3−6
3−6
3−7
3−8
3−7
3−8
AC OPERATING REQUIREMENTS
Symbol
Parameter
Setup Time, HIGH or LOW
ts S0 or S1 to CP
Hold Time, HIGH or LOW
th S0 or S1 to CP
Setup Time, HIGH or LOW
ts I/On to CP
Hold Time, HIGH or LOW
th I/On to CP
Setup Time, HIGH or LOW
ts DS0 or DS7 to CP
Hold Time, HIGH or LOW
th DS0 or DS7 to CP
tw CP Pulse Width, LOW
tw MR Pulse Width, LOW
Recovery TIme
trec MR to CP
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
74AC
74AC
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = −40°C
to +85°C
CL = 50 pF
Typ Guaranteed Minimum
Unit
Fig.
No.
3.3 −
5.0 −
8.0
5.0
8.5
5.5 ns 3−9
3.3 −
5.0 −
0.5
1.0
0.5
1.0 ns 3−9
3.3 −
5.0 −
5.5
3.5
6.0
4.0 ns 3−9
3.3 −
5.0 −
0
1.0
0
1.0 ns 3−9
3.3 −
5.0 −
6.5
4.0
7.0
4.5 ns 3−6
3.3 −
5.0 −
0
1.0
0.5
1.0 ns 3−6
3.3 −
5.0 −
4.5
3.5
5.0
3.5 ns 3−6
3.3 −
5.0 −
4.5
3.5
5.0
3.5 ns 3−9
3.3 −
5.0 −
1.5
1.5
1.5
1.5 ns 3−9
http://onsemi.com
5
5 Page 
Notes
MC74AC299, MC74ACT299
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MC74AC299.PDF ] | |
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