74F257A

74F257A, Quad 2-line to 1-line selector/multiplexer, SOP, -0.5V to +7.0V, 48mA, -30 to +5mA

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PartNumber:: 74F257A

Brand:: National Semiconductor - NS | Pack: SOP | D/C: 12+

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Products Upload time: 2012-12-06

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Product Summary

The 74F257A is a Quad 2-line to 1-line selector/multiplexer with 3-State outputs which select 4 bits of data from two sources uncer control of a common Select (S) input. The I0a inputs of the 74F257A are selected when the common Select input is Low and the I1n inputs are selected when the common Select input is High. Data appears at the outputs in true non-inverted form from the selected inputs. The 74F257A 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.

Parametrics

74F257A absolute maximum ratings: (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 +5mA; (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: 48mA; (6)T Operating free air temperature range Commercial range: 0 to +70℃; (7)Tamb free-Industrial range:–40 to +85℃; (8)Tstg Storage temperature range:–65 to +150℃.

Features

74F257A features: (1)Industrial range available (-40℃ to +85℃); (2)Multifunction capability; (3)Non-inverting data path; (4)3-State outputs; (5)See 74F258A for inverting version.