| Features Number of Channels FIFO Protocol Voltage - Supply With Parallel Port With Auto Flow Control With IrDA Encoder Decoder With False Start Bit Detection With Modem Control With CMOS Mounting Type Package / Case | - 4, QUART 64 Byte RS232 2.25 V ~ 3.6 V - Yes Yes Yes Yes Yes Surface Mount 48-VFQFN Exposed Pad 48-QFN-EP (7x7) |