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PDF 54ACTQ373 Data sheet ( Hoja de datos )
| Número de pieza | 54ACTQ373 | |
| Descripción | Quiet Series Octal Transparent Latch | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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September 1998
54ACQ373 • 54ACTQ373
Quiet Series Octal Transparent Latch with TRI-STATE®
Outputs
General Description
The ’ACQ/’ACTQ373 consists of eight latches with
TRI-STATE outputs for bus organized system applications.
The latches appear transparent to the data when Latch En-
able (LE) is HIGH. When LE is low, the data satisfying the in-
put timing requirements is latched. Data appears on the bus
when the Output Enable (OE) is LOW. When OE is HIGH,
the bus output is in the high impedance state.
The ’ACQ/’ACTQ373 utilizes NSC Quiet Series technology
to guarantee quiet output switching and improve dynamic
threshold performance. FACT Quiet Series™ features
GTO™ output control and undershoot corrector in addition to
a split ground bus for superior performance.
Features
n ICC and IOZ reduced by 50%
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Improved latch up immunity
n Eight latches in a single package
n TRI-STATE outputs drive bus lines or buffer memory
address registers
n Outputs source/sink 24 mA
n Faster prop delays than the standard ’AC/’ACT373
n 4 kV minimum ESD immunity (’ACQ)
n Standard Military Drawing (SMD)
— ’ACTQ373: 5962-92188
— ’ACQ373: 5962-92178
Logic Symbols
IEEE/IEC
DS100238-1
Pin Names
D0– D7
LE
OE
O0– O7
Description
Data Inputs
Latch Enable Input
Output Enable Input
TRI-STATE Latch Outputs
DS100238-2
GTO™ is a trademark of National Semiconductor Corporation.
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Series™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100238
www.national.com
1 page  
DC Characteristics for ’ACTQ Family Devices (Continued)
54ACTQ
Symbol
Parameter
VCC
TA =
(V) −55˚C to +125˚C
Guaranteed Limits
ICCT
IOLD
IOHD
Maximum
ICC/Input
Minimum Dynamic
Output Current
(Note 9)
5.5
5.5
5.5
1.6
50
−50
ICC Maximum Quiescent
Supply Current
5.5
80.0
VOLP
VOLV
Quiet Output
Maximum Dynamic VOL
Quiet Output
Minimum Dynamic VOL
5.0
5.0
1.5
−1.2
Note 8: All outputs loaded; thresholds on input associated with output under test.
Note 9: Maximum test duration 2.0 ms, one output loaded at a time.
Note 10: ICC for 54ACTQ @ 25˚C is identical to 74ACTQ @ 25˚C.
Note 11: Plastic DIP package.
Note 12: Max number of outputs defined as (n). Data inputs are driven 0V to 3V. One output @ GND.
Units
mA
mA
mA
µA
V
V
Conditions
VI = VCC − 2.1V
VOLD = 1.65V Max
VOHD = 3.85V Min
VIN = VCC
or GND (Note 10)
(Notes 11, 12)
(Notes 11, 12)
AC Electrical Characteristics
Symbol
Parameter
tPHL, tPLH
tPHL, tPLH
tPZL, tPZH
Propagation Delay
Dn to On
Propagation Delay
LE to On
Output Enable Time
tPHZ, tPLZ
Output Disable Time
Note 13: Voltage Range 5.0 is 5.0V ±0.5V.
Voltage Range 3.3 is 3.3V ±0.3V.
VCC
(V)
(Note 13)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
54ACQ
TA = −55˚C
to +125˚C
CL = 50 pF
Min Max
1.0 15.0
1.0 9.5
1.0 16.0
1.0 9.5
1.0 14.5
1.0 10.5
1.0 12.0
1.0 10.5
Units
ns
ns
ns
ns
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 54ACTQ373.PDF ] | |
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