SN54AS652JT ,Octal Bus Transceivers And Registers With 3-State Outputs SN54ALS652, SN54ALS653, SN54AS651, SN54AS652 SN74ALS651A, SN74ALS652A, SN74ALS653, SN74ALS654, SN7 ..
SN54AS804BJ ,Hex 2-Input NAND Driverselectrical characteristics over recommended operating free-air temperature range (unlessotherwise n ..
SN54BCT244J , OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SN54F00J ,Quadruple 2-Input Positive-NAND Gateselectrical characteristics over recommended operating free-air temperature range (unlessotherwise n ..
SN54F00J ,Quadruple 2-Input Positive-NAND Gatesmaximum ratings” may cause permanent damage to the device. These are stress ratings only andfunctio ..
SN54F00J ,Quadruple 2-Input Positive-NAND Gateslogic diagram (positive logic)11A321Y1B42A65 2Y2B93A810 3Y3B124A1113 4Y4BPin numbers shown are for ..
SN74F04DR ,Hex invertersmaximum ratings” may cause permanent damage to the device. These are stress ratings only andfunctio ..
SN74F04N ,Hex invertersmaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
SN74F04NSR ,Hex invertersmaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
SN74F08 ,Quadruple 2-Input Positive-AND Gatelogic diagram, each gate (positive logic)1 A1A & 3Y1Y2 B1B462A2Y52B93A810 3Y3B124A1113 4Y4B†This sy ..
SN74F08D ,Quadruple 2-Input Positive-AND Gate/productcontent for the latest availabilityinformation and additional product content details.TBD: ..
SN74F08DBR ,Quadruple 2-Input Positive-AND Gatemaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage ra ..
SN54AS652JT
Octal Bus Transceivers And Registers With 3-State Outputs
Choice of True or Inverting Data Paths Choice of 3-State or Open-CollectorOutputs to A Bus
descriptionThese devices consist of bus-transceiver circuits,
D-type flip-flops, and control circuitry arranged for
multiplexed transmission of data directly from the
data bus or from the internal storage registers.
Output-enable (OEAB and OEBA) inputs are
provided to control the transceiver functions.
Select-control (SAB and SBA) inputs are provided
to select real-time or stored data transfer. The
circuitry used for select control eliminates the
typical decoding glitch that occurs in a multiplexer
during the transition between stored and real-time
data. A low input level selects real-time data, and
a high input level selects stored data. Figure 1
illustrates the four fundamental bus-management
functions that can be performed with the octal bus
transceivers and registers
Data on the A or B data bus, or both, can be stored in the internal D-type flip-flops by low-to-high transitions at
the appropriate clock (CLKAB or CLKBA) terminals, regardless of the select- or output-control terminals. When
SAB and SBA are in the real-time transfer mode, it is possible to store data without using the internal D-type
flip-flops by simultaneously enabling OEAB and OEBA. In this configuration, each output reinforces its input.
When all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remains
at its last state.
The -1 versions of the SN74ALS651A and SN74ALS652A are identical to the standard versions except that the
recommended maximum IOL for the -1 versions is increased to 48 mA. There are no -1 versions of the
SN54ALS652, SN54ALS653, SN74ALS653, and SN74ALS654.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NC – No internal connection
SN54ALS’, SN54AS’... FK PACKAGE
(TOP VIEW)OEAB
GND
SBA
OEBA
OEBA
GNDB7B6
OEABSABCLKABNC
CLKBASAB
