XR21V1410_10 Datasheet, PDF (4/27 Pages) Exar Corporation – 1-CH FULL-SPEED USB UART

XR21V1410
1-CH FULL-SPEED USB UART
Pin Description
NAME
16-QFN
PIN #
USB Interface Signals
USBD+
15
USBD-
14
I²C Interface Signals
SDA
11
SCL
12
Miscellaneous Signals
LOWPOWER
2
VCC
GND
16
1, 13
TYPE
I/O
I/O
OD
I
O
Pwr
Pwr
REV. 1.1.0
DESCRIPTION
USB port differential data plus. This pin has a 1.5 K Ohm internal pull-up
resistor.
USB port differential data minus.
I²C-controller data input/output (open-drain). An optional external I²C
EEPROM can be used to store default configurations upon power-up
including the USB Vendor ID and Device ID. See Table 3. A pull-up
resistor (typically 4.7 to 10 KOhms) is required.
If an EEPROM is not used, this pin can be used with the SCL pin to
select the Remote Wake-up and Power modes. An external pull-up or
pull-down resistor is required. See Table 2
I²C-controller serial input clock. An optional external I²C EEPROM can
be used to store default configurations upon power-up including the USB
Vendor ID and Device ID. See Table 3. A pull-up resistor (typically 4.7
to 10 KOhms) is required.
If an EEPROM is not used, this pin can be used with the SDA pin to
select the Remote Wake-up and Power modes. An external pull-up or
pull-down resistor is required. See Table 2
Low power status output. This pin will be asserted whenever the V1410
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 resis-
tor will cause the LOWPOWER pin to be asserted LOW during suspend
mode.
+3.3V power supply. (Note that all device inputs are 5V tolerant.)
Power supply common, ground.
NOTE: Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
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