XR21B1420 Datasheet, PDF (3/60 Pages) Exar Corporation – Enhanced 1-Ch Full-Speed USB UART

Symbol
Parameter
USB I/O Pins
V_IL
Input Low Voltage
V_IH
Input High Voltage
V_OL
Output Low Voltage
V_OH
Output High Voltage
V_DrvZ
Driver Output Impedance
Conditions
External 15kΩ to GND on USBD+ and
USBD- pins
External 15kΩ to GND on USBD+ and
USBD- pins
XR21B1420
Min
Typ
Max
Units
-0.3
0.8
V
2.0
5.5
V
0
0.3
V
2.8
3.6
V
28
44
Ω
Pin Configuration
GPIO1/CD# 1
GPIO0/RI#/RWK# 2
GND 3
USBD+ 4
USBD- 5
VCC 6
VCC_REG 7
Exar
XR21B1420
E_PAD
21 NC
20 NC
19 GPIO6/CLK
18 NC
17 GPIO7/RS485
16 GPIO8/TXT
15 NC
Top View
© 2014 Exar Corporation
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exar.com/XR21B1420
Rev 1A