Digi XBee 3 Cellular LTE-M, User Manual, Page: 101 / 331

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Electrical specifications
The following table provides the electrical specifications for the XBee Smart Modem.
Symbol Parameter Condition Min Typical Max Units
VCCMAX Maximum limits of VCC
line 0 4.3 V
VDD_IO Internal supply voltage
for I/O
(VCC - 0.15 V) or 3.3 V,
whichever is lower
VCC or 3.3 V, whichever is
lower 3.3 V
VI Other XBee pins -0.3
0.3 V
Voltage on XBee pin 6
(5 V tolerant) -0.3 5.25 or 2,
whichever is lower
1
VIL Input low voltage 0.3*VDD_
IO V
VIH Input high voltage 0.7*VDD_IO V
VOL Voltage output low Sinking 3 mA, VCC = 3.3 V 0.2*VDD_
IO V
VOH Voltage output high Sourcing 3 mA, VCC = 3.3 V 0.8*VDD_IO V
I_IN Input leakage current High Z state I/O connected to
Ground or VDD_IO 0.1 30 nA
RPU Internal pull-up resistor Enabled 40 kΩ
RPD Internal pull-down
resistor Enabled 40 kΩ
1 Pin 6 is 5 V tolerant even when the XBee Smart Modem is not powered. We recommend only driving this pin with 3.3 V for compatibility with other XBee products.