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부품번호 | 54ACT251 기능 |
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기능 | 8-Input Multiplexer | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 10 페이지수
www.DataSheet4U.com
August 1998
54AC251 • 54ACT251
8-Input Multiplexer with TRI-STATE® Output
General Description
The ’AC/’ACT251 is a high-speed 8-input digital multiplexer.
It provides, in one package, the ability to select one bit of
data from up to eight sources. It can be used as universal
function generator to generate any logic function of four vari-
ables. Both true and complementary outputs are provided.
Features
n ICC reduced by 50%
n Multifunctional capability
n On-chip select logic decoding
n Inverting and noninverting TRI-STATE outputs
n Outputs source/sink 24 mA
n ’ACT251 has TTL-compatible inputs
n Standard Military Drawing (SMD)
— ’AC251: 5962-87692
— ’ACT251: 5962-89599
Logic Symbols
IEEE/IEC
DS100284-1
Pin Names
S0– S2
OE
I0– I7
Z
Z
Description
Select Inputs
TRI-STATE Output Enable Input
Multiplexer Inputs
TRI-STATE Multiplexer Output
Complementary TRI-STATE Multiplexer
Output
DS100284-2
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100284
www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
DC Input Diode Current (IIK)
VI = −0.5V
VI = VCC + 0.5V
DC Input Voltage (VI)
DC Output Diode Current (IOK)
VO = −0.5V
VO = VCC + 0.5V
DC Output Voltage (VO)
DC Output Source
or Sink Current (IO)
DC VCC or Ground Current
per Output Pin (ICC or IGND)
Storage Temperature (TSTG)
Junction Temperature (TJ)
CDIP
−0.5V to +7.0V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
±50 mA
±50 mA
−65˚C to +150˚C
175˚C
Recommended Operating
Conditions
Supply Voltage (VCC)
’AC
2.0V to 6.0V
’ACT
4.5V to 5.5V
Input Voltage (VI)
Output Voltage (VO)
Operating Temperature (TA)
54AC/ACT
0V to VCC
0V to VCC
−55˚C to +125˚C
Minimum Input Edge Rate (∆V/∆t)
’AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
125 mV/ns
’ACT Devices
VIN from 0.8V to 2.0V
VCC @ 4.5V, 5.5V
125 mV/ns
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT® circuits outside databook specifications.
Note 2: All outputs loaded; thresholds on input associated with output under
test.
DC Characteristics for ’AC Family Devices
Symbol
Parameter
VIH Minimum High Level
Input Voltage
VIL Maximum Low Level
Input Voltage
VOH Minimum High Level
Output Voltage
VOL Maximum Low Level
Output Voltage
IIN Maximum Input
Leakage Current
54AC
VCC
TA = −55˚C to +125˚C
Units
(V) Guaranteed Limits
Conditions
3.0 2.1
4.5 3.15
5.5 3.85
VOUT = 0.1V
V or VCC − 0.1V
3.0 0.9
4.5 1.35
5.5 1.65
VOUT = 0.1V
V or VCC − 0.1V
3.0 2.9
4.5 4.4
IOUT = −50 µA
V
5.5 5.4
(Note 2)
3.0 2.4
4.5 3.7
5.5 4.7
3.0 0.1
4.5 0.1
VIN = VIL or VIH
IOH = −12 mA
V IOH = −24 mA
IOH = −24 mA
IOUT = 50 µA
V
5.5 0.1
(Note 2)
VIN = VIL or VIH
3.0 0.50
IOL = 12 mA
4.5 0.50
V IOL = 24 mA
5.5 0.50
IOL = 24 mA
5.5 ±1.0 µA VI = VCC, GND
www.national.com
4
4페이지 Capacitance
Symbol
CIN
CPD
Parameter
Input Capacitance
Power Dissipation
Capacitance
Typ
4.5
70.0
Units
pF
pF
Conditions
VCC = OPEN
VCC = 5.0V
7 www.national.com
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부품번호 | 상세설명 및 기능 | 제조사 |
54ACT251 | 8-Input Multiplexer | National Semiconductor |
54ACT251 | 54AC251 54ACT251 8-Input Multiplexer with TRI-STATE Output (Rev. B) | Texas Instruments |
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