Product Summary

The SN74ALS257DR is a quadruple 2-line to 1-line data selector/multiplexer with 3-state outputs. It is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level. The SN74ALS257DR is characterized for operation over the full military temperature range of 0℃ to 70℃.

Parametrics

SN74ALS257DR absolute maximum ratings: (1)Supply voltage, VCC: 7V; (2)Input voltage, VI: 7V; (3)Voltage applied to a disabled 3-state output: 5.5V; (4)Maximum power dissipation at TA = 55°C (in still air) D package :1.3W, N package: 1.1W; (5)Operating free-air temperature range, TA:0℃ to 70℃; (6)Storage temperature range, Tstg:–65℃ to 150℃.

Features

SN74ALS257DR features: (1)3-State Outputs Interface Directly With System Bus; (2) Provide Bus Interface from Multiple Sources in High-Performance Systems; (3) Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs.

Diagrams

SN74ALS257DR block diagram

SN7400
SN7400
Other

Data Sheet
Negotiable 
SN7400D
SN7400D
Texas Instruments
Gates (AND / NAND / OR / NOR) Quad 2-input Positive-NAND gates
Data Sheet
0-1: $0.79
1-25: $0.71
25-100: $0.62
100-250: $0.55
SN7400DE4
SN7400DE4
Texas Instruments
Gates (AND / NAND / OR / NOR) Quad 2-input Positive-NAND gates
Data Sheet
0-1: $0.79
1-25: $0.64
25-100: $0.58
100-250: $0.51
SN7400DG4
SN7400DG4
Texas Instruments
Gates (AND / NAND / OR / NOR) Quad 2-input Pos- NAND
Data Sheet
0-1: $0.79
1-25: $0.71
25-100: $0.62
100-250: $0.55
SN7400DR
SN7400DR

IC QUAD 2IN POS-NAND GATE 14SOIC
Data Sheet
Negotiable 
SN7400DRE4
SN7400DRE4

IC QUAD 2IN POS-NAND GATE 14SOIC
Data Sheet
Negotiable