XR21V1414 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XR21V1414' PDF : 32 Pages View PDF
XR21V1414
4-CH FULL-SPEED USB UART
Pin Description
REV. 1.1.0
NAME
48-QFN
PIN #
Miscellaneous Signals
LOWPOWER
2
VCC
GND
5, 18, 33,
44, 45
1, 4, 19,
32, 40, 41
TYPE
DESCRIPTION
O Low power status output. This pin will be asserted whenever the V1414
device is placed into the suspend state.
This pin is sampled momentarily at power-up or at any USB bus reset to
configure the polarity of the LOWPOWER output during suspend mode. An
external (10K) pull-up resistor will cause the LOWPOWER pin to be
asserted HIGH during suspend mode. An external (3.3K) pull-down resistor
will cause the LOWPOWER pin to be asserted LOW during suspend mode.
Pwr +3.3V power supply. (Note that all device inputs are 5V tolerant.)
Pwr Power supply common, ground.
NOTE: Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
8
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