Datasheet

Dual Serial UART with 128-Word FIFOs
MAX3109
13Maxim Integrated
Typical Operating Characteristics
(V
CC
= 2.5V, V
L
= 2.5V, V
EXT
= 2.5V, V
LDOEN
= V
L
, UART1 in sleep mode, T
A
= +25°C unless otherwise noted.)
SOURCE CURRENT (PUSH-PULL)
vs. GPIO_OUTPUT HIGH VOLTAGE
MAX3109 toc02
V
OH
(V)
I
SOURCE
(mA)
321
10
20
30
40
50
60
70
0
04
V
EXT
= 3.3V
V
EXT
= 2.5V
V
EXT
= 1.8V
TRANSMITTER SYNCHRONIZATION
MAX3109 toc03
10µs/div
V
SCL
2V/div
V
TX0
2V/div
115.2kBaud
V
TX1
2V/div
460.8kBaud
0V
0V
0V
I
2
C MODE
SINK CURRENT (OPEN DRAIN)
vs. GPIO_ OUTPUT LOW VOLTAGE
MAX3109 toc01
V
OL
(V)
I
SINK
(mA)
321
20
40
60
80
100
120
140
160
180
0
04
V
EXT
= 3.6V
V
EXT
= 2.5V
V
EXT
= 1.71V