Z8440

      The Z8440 is designed as serial input/output controller.Its basic functions as a serial to parallel, parallel to serial connverter/controller which could be programmed by a CPU for a board range of serial communication applications.
      Z8440 has many features.The first one is that it would have asynchronous protocols which means everything necessary for complete messages in 5, 6, 7, or 8 bits/character. Includes varible stop bits and several clock-rate multiplier, break generation and detection; parity; overrun and traming error detection.The second one is about its synchronous protocols which means everything necessary for complete bits or byte oriented messages in 5, 6, 7 or 8 bits/character, including IBM bisync, SDLC, HDLC, CCITT-X25 and ithers automatic CRC generation/checking, sync character and zero insertion/detetion, abort generation/detection and flag insertion.The third one is receiver data registers quadruply buffered, transmitter registers doubly buffered.The next one is it would be highly sophosticcated and flexible daisy-chain interrupt vectoring for interrupts without external logic.And so on.
      Some absolute maximum ratings of Z8440 have been concluded into several points as follow.The first one is about its voltage in Vcc with respect to Vss which would be from -0.3V to 0.7V.The second one is about its voltage on all inputs with respect to Vss which would be from -0.3V to Vcc+0.3V.The third one is about its storage temperature which would be from -65°C to +150°C.Something should be noted that stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device.
      Also some electrical DC characteristics about Z8440.The first one is about its clock input low voltage which would be min -0.3V and max +0.45V.The second one is about its clock input high voltage which would be min Vcc-0.6 V and max Vcc+0.3 V.The third one is about its input high voltage which would be min 2.2V and max Vcc V.The next one is about its input low voltage which would be -0.3V and max 0.8V.The next one is about its output low voltage which would be max 0.4V.And so on.For more information please contadct us.