Philips 74F257A
The 74F257A has 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. The I0a inputs are selected when the common Select input is Low and the I1n inputs are selected when the common Select input is High. 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.| Part No. | 74F257A |
|---|---|
| Datasheet | 74F257A Download |
| Manufacturer |  Philips |
| Description | Quad 2-lnput selector/multiplexer |
| Buy | Stock & Price |
FEATURES
● Industrial range available (–40°C to +85°C)● Multifunction capability
● Non-inverting data path
● 3-State outputs
● See 74F258A for inverting version
DESCRIPTION
Data appears at the outputs in true non-inverted form from the selected inputs. 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. PIN CONFIGURATION S I0a I1a Ya I0b I1b Yb GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OE I0d I1d Yd I0c I1c Yc SF00673 TYPE 74F257A TYPICAL PROPAGATION DELAY 4.3ns TYPICAL SUPPLY CURRENT (TOTAL) 12mA ORDERING INFORMATION ORDER CODEDESCRIPTION
16-pin plastic DIP 16-pin plastic SO COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F257AN N74F257AD INDUSTRIAL RANGE VCC = 5V ±10%, Tamb...
