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IN74ACT251

IK Semiconductor
Part Number IN74ACT251
Manufacturer IK Semiconductor
Description 8-1 Data Selector/Multiplexer
Published Dec 8, 2005
Detailed Description TECHNICAL DATA 8-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS The IN74ACT251 is id...
Datasheet PDF File IN74ACT251 PDF File

IN74ACT251
IN74ACT251

Overview
TECHNICAL DATA 8-Input Data Selector/Multiplexer with 3-State Outputs High-Speed Silicon-Gate CMOS The IN74ACT251 is identical in pinout to the LS/ALS251, HC/HCT251.
The IN74ACT251 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs.
The device selects one of the eight binary Data Inputs, as determined by the Address Inputs.
The Output Enable pin must be at a low level for the selected data to appear at the outputs.
If Output Enable is high, the Y and the Y outputs are in the high-impedance state.
This 3-State feature allows the IN74ACT251 to be used in bus-oriented systems.
• TTL/NMOS Compatible Input Levels • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 4.
5 to 5.
5 V • Low Input Current: 1.
0 µA; 0.
1 µA @ 25°C • Outputs Source/Sink 24 mA IN74ACT251 ORDERING INFORMATION IN74ACT251N Plastic IN74ACT251D SOIC TA = -40° to 85° C for all packages PIN ASSIGNMENT LOGIC DIAGRAM FUNCTION TABLE Inputs A2 X L L L L H H H A1 X L L H H L L H A0 X L H L H L H L Output Enable H L L L L L L L Outputs Y Z D0 D1 D2 D3 D4 D5 D6 Y Z D0 D1 D2 D3 D4 D5 D6 w w w .
d h s a t a ee .
u t4 PIN 16 =VCC PIN 8 = GND m o c H H H L D7 D7 D0,D1.
.
.
D7=the level of the respective D input Z = high-impedance state X = don’t care 1 www.
DataSheet4U.
com IN74ACT251 MAXIMUM RATINGS* Symbol VCC VIN VOUT IIN IOUT ICC PD Tstg TL * Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Sink/Source Current, per Pin DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Plastic DIP+ SOIC Package+ Storage Temperature Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) Value -0.
5 to +7.
0 -0.
5 to VCC +0.
5 -0.
5 to VCC +0.
5 ±20 ±50 ±50 750 500 -65 to +150 260 Unit V V V mA mA mA mW °C °C Maximum Ratings are those values beyond which damage to the device may occur.
Functional operatio...


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