HD74LS245

The HD74LS245 is designed as one kind of ictal bus transceivers with three-state outputs for synchronous two-way communication between data buses. The control function implementation minimizes external timing requirements. The HD74LS245 allows data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction control (DIR) input. The enable input can be used to disable the device so that the buses are effectively isolated.

Some absolute maximum ratings of HD74LS245 have been concluded into several points as follow. (1)Its supplt voltage would beb 7.0V. (2)Its input voltage would be 7.0V for DIR, G and would be 5.5V for A, B. (3)Its operting temperature range would be from -20°C to +75°C. (4)Its storage temperature range would be from -65°C to 150°C. (5)Its recommended output current high level would be max -15mA. (6)Its output current low level would be max 24mA. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of HD74LS245 are concluded as follow. (1)Its input voltage high level would be min 2.0V. (2)Its input voltage low level would be max 0.8V. (3)Its hysteresis would be min 0.2V and typ 0.4V. (4)Its output voltage high level would be min 2.4V. (5)Its output voltage low level would be max 0.4mA at Iol=12mA and would be max 0.5V at Iol=24mA. (6)Its output current high would be max 10uA at Vo=2.7V and would be max -200uA at Vo=0.4V. (7)Its input current high level would be max 20uA. (8)Its input current low level would be max -0.2mA. (8)Its shrt-circuit output current would be min -40mA and max -225mA. (9)Its supply current would be typ 48mA and max 70mA for Icch and would be typ 62mA and max 90mA for Iccl and would be typ 64mA and max 95mA for Iccz. (10)Its input clamp voltage would be max -1.5V. And so on. If you have any question or suggestion or want to know more information of HD74LS245, please contact us for details. Thank you!