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74AS242D PDF预览

74AS242D

更新时间： 2024-11-27 08:16:19
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罗彻斯特 - ROCHESTER /
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7页 1235K
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Bus Transceiver

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74AS242D 数据手册

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REI Datasheet  
SN54ALS242B, SN54ALS243A, SN54AS242, SN54AS243  
SN74ALS242B, SN74ALS243A, SN74AS242, SN74AS243  
Quadruple Bus Transceivers with 3-State Outputs  
These quadruple bus transceivers are designed for asynchronous two-way communications between  
data buses. The control function implementation allows for maximum flexibility in timing. These  
devices allow data transmission from the A bus to the B bus or from the B bus to the A bus depending  
upon the logic levels at the enable inputs (GBA and GAB). The enable inputs can be used to disable  
the device so that the buses are effectively isolated.  
The dual-enable configuration gives the quadruple bus transceivers the capability to store data  
by simultaneous enabling of GBA and GAB. Each output reinforces its input in this transceiver  
configuration. Thus, when both control inputs are enabled and all other data sources to the two sets  
of bus lines are at high impedance, both sets of bus lines (8 in all) will retain their states. The 4-bit  
codes appearing on the two sets of buses will be complimentary for the ‘ALS242 and ‘AS242 or  
identical for the ‘ALS243 and ‘AS243.  
Quality Overview  
Rochester Electronics  
Manufactured Components  
•
•
•
ISO-9001  
AS9120 certification  
Qualified Manufacturers List (QML) MIL-PRF-38535  
Rochester branded components are  
manufactured using either die/wafers  
purchased from the original suppliers  
or Rochester wafers recreated from the  
original IP. All recreations are done with  
the approval of the OCM.  
•
•
Class Q Military  
Class V Space Level  
•
Qualified Suppliers List of Distributors (QSLD)  
•
Rochester is a critical supplier to DLA and  
meets all industry and DLA standards.  
Parts are tested using original factory  
test programs or Rochester developed  
test solutions to guarantee product  
meets or exceeds the OCM data sheet.  
RochesterElectronics, LLCiscommittedtosupplying  
products that satisfy customer expectations for  
quality and are equal to those originally supplied by  
industry manufacturers.  
The original manufacturer’s datasheet accompanying this document reflects the performance  
and specifications of the Rochester manufactured version of this device. Rochester Electronics  
guarantees the performance of its semiconductor products to the original OEM specifications.  
‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be  
based on product characterization, design, simulation, or sample testing.  
© 2013 Rochester Electronics, LLC. All Rights Reserved 12232013  
To learn more, please visit www.rocelec.com  
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