SN54ALS652, SN54ALS653, SN54AS651, SN54AS652 SN74ALS651A, SN74ALS652A, SN74ALS653, SN74ALS654, SN74AS651,SN74AS652 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SDAS066F - DECEMBER 1983 - REVISED OCTOBER 1996
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features
- Bus Transceivers/Registers
- Independent Registers and Enables for A and B Buses
- Multiplexed Real-Time and Stored Data
- Choice of True or Inverting Data Paths
- Choice of 3-State or Open-Collector Outputs to A Bus
- Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPs
description
These devices consist of bus-transceiver circuits, D-typeflip-flops, and control circuitry arranged for multiplexedtransmission of data directly from the data bus or from the internalstorage registers. Output-enable (OEAB and ) inputs are provided to controlthe transceiver functions. Select-control (SAB and SBA) inputs areprovided to select real-time or stored data transfer. The circuitryused for select control eliminates the typical decoding glitch thatoccurs in a multiplexer during the transition between stored andreal-time data. A low input level selects real-time data, and a highinput level selects stored data. Figure 1 illustrates the fourfundamental bus-management functions that can be performed with theoctal bus transceivers and registers.
Data on the A or B data bus, or both, can be stored in theinternal D-type flip-flops by low-to-high transitions at theappropriate clock (CLKAB or CLKBA) terminals, regardless of theselect- or output-control terminals. When SAB and SBA are in thereal-time transfer mode, it is possible to store data without usingthe internal D-type flip-flops by simultaneously enabling OEAB and
. In thisconfiguration, each output reinforces its input. When all other datasources to the two sets of bus lines are at high impedance, each setof bus lines remains at its last state.
The -1 versions of the SN74ALS651A and SN74ALS652A are identicalto the standard versions except that the recommended maximumIOL for the -1 versions is increased to 48 mA. There areno -1 versions of the SN54ALS652, SN54ALS653, SN74ALS653, andSN74ALS654.
The SN54ALS' and SN54AS' families are characterized for operationover the full military temperature range of -55°C to 125°C.The SN74ALS' and SN74AS' families are characterized for operationfrom 0°C to 70°C.
Title: OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
Product Family: REGISTERED TRANSCEIVERS
Device Functionality: BUS TRANSCEIVERS
Orderable Devices: 5962-8867301KA, SN54ALS652JT, SNJ54ALS652FK, SNJ54ALS652JT, SNJ54ALS652W, 5962-89687013A, SNJ54ALS653FK, SNJ54ALS653JT, SNJ54ALS653W, 5962-8875301KA, SN54AS651JT, SNJ54AS651JT, SN54AS652JT, SNJ54AS652FK, SNJ54AS652JT, SNJ54AS652W, SN74ALS651A-1DW, SN74ALS651A-1DWR, SN74ALS651A-1NT, SN74ALS651ADW, SN74ALS651ADWR, SN74ALS651ANT, SN74ALS651A-1DW, SN74ALS651A-1DWR, SN74ALS651A-1NT, SN74ALS652A-1DW, SN74ALS652A-1DWR, SN74ALS652A-1NT, SN74ALS652ADW, SN74ALS652ADWR, SN74ALS652ANT, SN74ALS652A-1DW, SN74ALS652A-1DWR, SN74ALS652A-1NT, SN74ALS653-1DW, SN74ALS653-1NT, SN74ALS653DW, SN74ALS653DWR, SN74ALS653NT, SN74ALS654DW, SN74ALS654DWR, SN74ALS654NT, SN74AS651DW, SN74AS651DWR, SN74AS651NT, SN74AS652DW, SN74AS652DWR, SN74AS652NT
View the complete PDF datasheet: sdas066f.pdf (311 K Bytes) (Requires Acrobat Reader 3.x)View more information about generic part numbers:SN54ALS652, SN54ALS653, SN54AS651, SN54AS652, SN74ALS651A, SN74ALS651A-1, SN74ALS652A, SN74ALS652A-1, SN74ALS653, SN74ALS654, SN74AS651, SN74AS652
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