User's Manual

LZT 123 1834 42
VREF output
Parameter Min Nom Max Unit
VREF output voltage 2.74 2.8 2.86 V
VREF load current 75 mA
5.6.2 VREF as an Input
The version of GR64 with an integrated SIM holder provides a reference input to the
host side level shifter devices. This enables users of varying technologies to connect
directly to the GR64’s IO by providing a reference from their own application IO.
VREF Input
Parameter Min Typ Max Unit
VREF input voltage 1.8 5.2 V
VREF load current 0.1 50
µA
Figure 5.6-1 Level shifter arrangement