N74F257AD

Number of Bits :
Mounting Style : SMD/SMT
Supply Voltage - Max : 5.5 V
Supply Voltage - Min : 4.5 V
Package / Case : SO-16
Packaging : Tube
Product : Decoders, Encoders, Multiplexers & Demultiplexers
Maximum Operating Temperature : + 70 C
Number of Lines (Input / Output) : 8 / 4
Logic Family : F
Propagation Delay Time : 6 ns at 5 V


Pinout




Description

The N74F257AD is a kind of 3-state Quad 2-line to 1-line selector/multiplexer. The N74F257AD includes four identical 2-input multiplexers with 3-State outputs which select 4 bits of data from two sources uncer control of a common Select (S) input. N74F257AD is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the common Slect input. Outputs are forced to a high impedance "off" state when the Output Enable (OE) is High. All but one device must be in high impedance state to avoid currents that would exceed the maximum rating if the outputs were tied together. Design of the Output Enable signals must ensure that there is no overlap when outputs of 3-state devices were tied together.

There are some features of N74F257AD as follows: (1)Industrial range available (0 to +85); (2)Multifunction capability; (3)Non-inverting data path; (4)3-State outputs; (5)See 74F258A for inverting version.

Then is about the absolute maximum ratings of N74F257AD: (1)VCC, Supply voltage: 0.5 to +7.0 V; (2)VIN, Input voltage: 0.5 to +7.0 V; (3)IIN, Input current: 30 to +5 mA; (4)VOUT, Voltage applied to output in high output state: 0.5 to VCC V; (5)IOUT, Current applied to output in low output state: 48 mA; (6)Tamb, Operating free air temperature range: commercial range: 0 to +70; industrical range: -40 to +85; (7)Tstg, Storage temperature range: 65 to +150.

Then is about the recommended operating conditions of N74F257AD: (1)VCC, Supply voltage: 4.5 V min, 5.0 V typ and 5.5 V max; (2)IIK, Input clamp current: 18 mA max; (3)IOH, High-level output current: 3 mA max; (4)IOL Low-level output current: 24 mA max; (5)VIH, high level input voltage: 2.0 V min; (6)VIL, low level input voltage: 0.8 V max; (5)Tamb, Operating free-air temperature range: commercial range: 0 to +70; industrical range: -40 to +85.