SN54LS646

The SN54LS646 is designed as octal bus transceivers and registers. SN54LS646 consist of bus transceiver circuits with 3-state or open collector outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus will be clocked into the registers on the low to high transition of the appropriate clock pin (CAB or CBA).

SN54LS646 has six features. (1) Independent registers for A and B buses. (2) Multiplexed real time and stored data. (3) Choice of true or inverting data paths. (4) Choice of 3-state or open collector. (5) Included among the package options are compact 24-pin 300-mil-wide plastic and ceramic DIPs. Ceramic chip carriers, and plastic "small outline" packages. (6) Dependable texas instruments quality and reliability. That are all the main features.

Some absolute maximum ratings of SN54LS646 have been concluded into several points as follow. (1) Its supply voltage would be 7V. (2) Its input voltage would be 7V for control inputs and 5.5V for I/O ports. (3) Its operating free-air temperature range would be from -55°C to 125°C. (4) Its storage temperature range would be from -65°C to 150°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics about SN54LS646. (1) Its Vik would be max -1.5V. (2) Its output voltage high would be min 2.4V and typ 3.4V at Ioh=-3mA and would be min 2V at Ioh=-12mA. (3) Its output voltage low would be typ 0.25V and max 0.4V at Iol=12mA. (4) Its Ii would be max 0.1mA. (5) Its Iih would be max 20uA. (6) Its Iil would be max -0.4mA. And so on. If you have any question or suggestion or want to know more information about SN54LS646 please contact us for details. Thank you!