PDF 54ACT251 Data sheet ( Hoja de datos )

Número de pieza	54ACT251
Descripción	8-Input Multiplexer
Fabricantes	National Semiconductor
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No Preview Available ! 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 1 page DC Characteristics for ’AC Family Devices (Continued) Symbol Parameter IOZ Maximum TRI-STATE Current 54AC VCC TA = −55˚C to +125˚C (V) Guaranteed Limits 5.5 ±5.0 IOLD IOHD ICC Minimum Dynamic Output Current (Note 3) Maximum Quiescent Supply Current 5.5 5.5 5.5 50 −50 80.0 Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: 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 Characteristics for ’ACT Family Devices Symbol Parameter VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage 54ACT VCC TA = −55˚C to +125˚C (V) Guaranteed Limits 4.5 2.0 5.5 2.0 4.5 0.8 5.5 0.8 4.5 4.4 5.5 5.4 VOL Maximum Low Level Output Voltage 4.5 5.5 4.5 5.5 3.70 4.70 0.1 0.1 IIN IOZ ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum TRI-STATE Current Maximum ICC/Input Minimum Dynamic Output Current (Note 6) Maximum Quiescent Supply Current 4.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 Note 5: All outputs loaded; thresholds on input associated with output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time. Note 7: ICC for 54ACT @ 25˚C is identical to 74ACT @ 25˚C. 0.50 0.50 ±1.0 ±5.0 1.6 50 −50 80.0 Units Conditions VI (OE) = VIL, VIH µA VI = VCC, VGND VO = VCC, GND mA VOLD = 1.65V Max mA VOHD = 3.85V Min µA VIN = VCC or GND Units Conditions V VOUT = 0.1V or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V V IOUT = −50 µA (Note 5) VIN = VIL or VIH V IOH = −24 mA IOH = −24 mA V IOUT = 50 µA (Note 5) VIN = VIL or VIH V IOL = 24 mA IOL = 24 mA µA VI = VCC, GND µA VI = VIL, VIH VO = VCC, GND mA VI = VCC − 2.1V mA VOLD = 1.65V Max mA VOHD = 3.85V Min µA VIN = VCC or GND 5 www.national.com 5 Page

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