M54HC7640

The M54/74HC7245 HC7640, HC7643 andHC7645 utilise silicon gate C²MOS technology to achive operating speeds equivalent to LSTTL devices.

Along with the low power dissipation and high noise immunity of standads C²MOS integrated circuit, M54/74HC7245 HC7640, HC7643 andHC7645 possesses the capability to drive 15 LSTTL loads. These M54/74HC7245 HC7640, HC7643 andHC7645 IC's are intended for two-way asynchronous communication between data buses, and the direction of data trasmission is determined by DIR input. The enable input (G) can be used todisable the device so that the buses are effectively isolated. The HC7245/640/7643/7645 have the same pin configuration and function as the HC245/640/643 and they have a hysteresis characteristics with each input, so HC7245/7640/7643/7645 can be used as a line receiver, etc. All input are equipped with protection circuits against static discharge and transient excess voltage.

M54/74HC7245 HC7640, HC7643 andHC7645 ISPROHIBITEDTOAPPLYA SIGNAL TOA BUS TERMINAL WHEN IT IS IN OUTPUT MODE AND WHEN A BUS THERMINAL IS FLOATING (HIGH IMPEDANCE STATE), IT IS REQUESTED TO FIX THE INPUT LEVEL BY MEANS OF EXTERNAL PULLDOWN OR PULL UP RESISTOR.