XR19L222 Datasheet, PDF (6/53 Pages) Exar Corporation – TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

XR19L222
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
Pin Descriptions
REV. 1.0.0
NAME
-
NC
64-QFN
PIN#
TYPE
DESCRIPTION
PAD Pwr _{The center pad on the backside of the 64-QFN package is metallic and is not electrically}
connected to anything inside the device. It must be soldered on to the PCB and may be
optionally connected to GND on the PCB. The thermal pad size on the PCB should be the
approximate size of this center pad and should be solder mask defined. The solder mask
opening should be at least 0.0025" inwards from the edge of the PCB thermal pad.
26, 28, 33, - _{No Connect. Note that in Motorola mode, the IOR# pin also becomes an NC pin.}
34, 49, 50
NOTE: Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain. For CMOS/TTL Voltage levels, ’LOW’
indicates a voltage in the range 0V to VIL and ’HIGH" indicates a voltage in the range VIH to VCC. For RS-232
Voltage levels, ’LOW’ is any voltage < 1.5V and ’HIGH’ is any voltage > 3V.
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