SN54ALS857数据手册TI中文资料规格书

描述 Description

The ´ALS857 are hextuple 2-line to 1-line multiplexers with 3-state outputs. The devices can provide either true (COMP low) or inverted (COMP high) data at the Y outputs. In addition, the ´ALS857 perform the logical AND function (A \\x95 B) and the clear function as well. The four modes of operation are:
Select A-data inputsSelect B-data inputsAND A inputs with B inputsClear In either of the first two modes, OPER = 0 is high if all the selected A or B inputs are low. The six Y outputs and the OPER = 0 output are all 3-state and rated at 12-mA and 24-mA IOL for the SN54ALS857 and SN74ALS857, respectively. All outputs can be placed in the high-impedance state by applying a high level to the COMP, S0, and S1 inputs simultaneously.
The SN54ALS857 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS857 is characterized for operation from 0°C to 70°C.
 
 

特性 Features

• Select True or Complementary Data
• Perform AND/NAND (Masking) of A or B Operand
• Cascadable to Expand Number of Operands
• Detect Zeros on A or B Operands
• 3-State Outputs Interface Directly With System Bus
• Package Options Include Plastic Small-Outline (DW) Packages,Ceramic Chip Carriers (FK), and Standard Plastic (NT) and Ceramic(JT) 300-mil DIPs