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page 14
User Manual | Chronos
7
Electrical Specifications
7.1
Absolute Maximum and Minimum Ratings
Modem Pin
Min
Max
Notes
Vcell
-0.3V
4.5V
With respect to GND
Vcell_ref
-0.5V
6.5V
With respect to GND
VUSB
-0.3V
6.0V
With respect to GND
Pins referred to Vcell_ref
-0.5V
6.5V
With respect to GND
All other pins
-0.3V
2.1V
With respect to GND
7.2
Recommended Operating Conditions
Modem Pin
Min
Typ
Max
Notes
Vcell
3.4V
3.8V
4.2V
With respect to GND
Vcell_ref
1.65V
5.5V
With respect to GND
VUSB
5.0V
5.25V
With respect to GND
Pins referred to Vcell_ref
0V
Vcell_ref With respect to GND
All other pins
0V
1.8V
With respect to GND
Modem Pin
V
IH(min)
V
IL(max)
V
OH(min)
V
OL(max)
Notes
DOUT, CTS, RING,
PWR_MON, TX_AUX
--
--
0.67*Vcell_ref
0.4V
DIN, RTS, DTR, RX_AUX
0.7*Vcell_ref
0.3*Vcell_ref
--
--
VUSB
1.0V
0.4V
--
--
DVI_xx, IOx, SPI_xx,
CELL_LED, TXD1, RXD1,
CTS1, RTS1, GNSS_PPS
1.5V
0.35V
1.6V
0.2V