PC16553

The PC16553 is designed as one kind of dual universal asynchronous receivers/transmitters with FIFOs plus high performance parallel interface. PC16553 integrates two CMOS NS16550AF UARTs with a bidirectional parallel interface into a single IC. The serial ports are compatible with all existing software written for INS8250A, NS16450, NS16C450 and NS16550AF.

PC16553 has many features. (1)Dual UART capable of interfacing with existing INS8250A, NS16450 and NS16550AF software. (2)Capable of interfacing with all PC, PS/2 and centronics parallel port software. (3)High current drivers that meet or exceed all microchannel and PS/2 parallel port drive current requirements. (4)84ns read and write cycle time. (5)Provides all control and status pins for a complete PC, PS/2 and centronics parallel port interface. (6)After reset, all UART registers are identical to the 16450 register set. (7)In he UART FIFO mode both channels' transmitter and receiver are buffered with 16-bit FIFOs to reduce the number of interrupts presented to the CPU. And so on.

Some absolute maximum ratings of PC16553 have been concluded into several points as follow. (1)Its temperature under bias would be from 0°C to 70°C. (2)Its storage temperature range would be from -65°C to 150°C. (3)Its all input or output voltage with respect to Vss would be from -0.5V to 7.0V. (4)Its power dissipation would be 1W. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of PC16553 are concluded as follow. (1)Its input low voltage would be min -0.5V and max 0.8V. (2)Its input high voltage would be min 2V and max Vcc. (3)Its output low voltage would be max 0.4V with conditions of 1.6mA. (4)Its output high voltage would be min 2.4V with conditions of -1.0mA. (5)Its input leakage current would be max +/-10uA. (6)Its input capacitance would be typ 5pF and max 7pF. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!