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PDF 54ACT299 Data sheet ( Hoja de datos )
| Número de pieza | 54ACT299 | |
| Descripción | 8-Input Universal Shift/Storage Register | |
| Fabricantes | National Semiconductor | |
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September 1998
54AC299 • 54ACT299
8-Input Universal Shift/Storage Register with Common
Parallel I/O Pins
General Description
The ’AC/’ACT299 is an 8-bit universal shift/storage register
with TRI-STATE® outputs. Four modes of operation are pos-
sible: hold (store), shift left, shift right and load data. The par-
allel load inputs and flip-flop outputs are multiplexed to re-
duce the total number of package pins. Additional outputs
are provided for flip-flops Q0, Q7 to allow easy serial cascad-
ing. A separate active LOW Master Reset is used to reset the
register.
Features
n ICC and IOZ reduced by 50%
n Common parallel I/O for reduced pin count
n Additional serial inputs and outputs for expansion
n Four operating modes: shift left, shift right, load and
store
n TRI-STATE outputs for bus-oriented applications
n Outputs source/sink 24 mA
n ’ACT299 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
’AC299: 5962-88754
’ACT299: 5962-88771
Ordering Code:
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP and Flatpak
IEEE/IEC
DS100252-1
DS100252-2
Pin Assignment for LCC
DS100252-4
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100252
DS100252-3
www.national.com
1 page  
DC Electrical Characteristics
For ’AC Family Devices
Symbol
Parameter
VCC
(V)
IOLD
IOHD
ICC
IOZT
(Note 4)
Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
Maximum I/O
Leakage Current
5.5
5.5
5.5
5.5
54AC
TA =
−55˚C to +125˚C
Guaranteed Limits
50
−50
80.0
±5.5
Note 3: All outputs loaded; threshold on input associated with output under test.
Note 4: Maximum test duration 20 ms, one output loaded at a time.
Note 5: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC.
ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C.
DC Electrical Characteristics
For ’ACT Family Devices
Symbol
Parameter
VCC
(V)
VIH Minimum High Level
Input Voltage
VIL Maximum Low Level
Input Voltage
VOH Minimum High Level
4.5
5.5
3.0
4.5
4.5
5.5
54ACT
TA =
−55˚C to +125˚C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
VOL Maximum Low Level
Output Voltage
4.5 3.70
5.5 4.70
4.5 0.1
5.5 0.1
IIN
ICCT
IOLD
IOHD
ICC
IOZT
Maximum Input
Leakage Current
Maximum ICC/Input
(Note 8)
Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
Maximum I/O
Leakage Current
4.5 0.50
5.5 0.50
5.5 ±1.0
5.5 1.6
5.5 50
5.5 −50
5.5 80.0
5.5 ±5.0
5
Units
Conditions
mA VOLD = 1.65V Max
mA VOHD = 3.85V Min
µA VIN = VCC
or GND
VI(OE) = VIL, VIH
µA VI = VCC, GND
VO = VCC, GND
Units
Conditions
V VOUT = 0.1V
or VCC − 0.1V
VOUT = 0.1V
or VCC − 0.1V
V IOUT = −50 µA
(Note 7)
VIN = VIL or VIH
V IOH = −24 mA
IOH = −24 mA
V IOUT = 50 µA
(Note 7)
VIN = VIL or VIH
V IOL= 24 mA
IOL= 24 mA
µA VI = VCC, GND
mA VI = VCC − 2.1V
mA VOLD = 1.65V Max
mA VOHD = 3.85V Min
µA VIN = VCC
or GND
VI(OE) = VIL, VIH
µA VI = VCC, GND
VO = VCC, GND
www.national.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet 54ACT299.PDF ] | |
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