Chapter 3 – Electrical Characteristics
Multi-Tech Systems, Inc. MMCModem GPRS Developer’s Guide (S000445D)
14
50-Pin Operating Conditions
Parameter
I/O Type
Min
Max
Condition
V
input low
CMOS
-0.5V
0.8V
V
input high
CMOS 2.1V 3.0V
Serial Inputs
2.1V
5.0V
*
V
output low
1X
0.2V
I
OL
= -1mA
2X 0.2V
I
OL
= -2mA
3X 0.2V
I
OL
= -3mA
V
output high
1X
2.6V I
OH
= 1mA
2X 2.6V
I
OH
= 2mA
3X 2.6V
I
OH
= 3mA
*Note:
TXD, DTR, RTS serial input signals are 5V tolerant (these signals are the only 5V
tolerant signals)
