Datasheet

MAX3388E/MAX3389E
2.5V, ±15kV ESD-Protected RS-232
Transceivers for PDAs and Cell Phones
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= V
L
= +2.5V, T
A
= +25°C, unless otherwise noted.)
-5.0
-2.5
2.5
0
5.0
0 20001000 3000 4000 5000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3388E toc01
LOAD CAPACITANCE (pF)
OUTPUT VOLTAGE (V)
DATA RATE = 460kbps
LOAD = 3kΩ IN PARALLEL
0
2
4
6
8
10
12
14
16
0 1000 2000 3000 4000 5000
SLEW RATE vs. LOAD CAPACITANCE
MAX3386E toc02
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
SLEW RATE +
SLEW RATE -
-5.0
-2.5
2.5
0
5.0
0 100
150 200 250
50 300 350 400 450
TRANSMITTER OUTPUT VOLTAGE
vs. DATA RATE
MAX3388E toc03
DATA RATE (kbps)
OUTPUT VOLTAGE (V)
LOAD = 3kΩ, 1000pF
ONE TRANSMITTER SWITCHING
AT DATA RATE, OTHER
TRANSMITTERS AT 1/8
DATA RATE
0
20
10
40
30
50
60
0 20001000 3000 4000 5000
SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3388E toc04
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
LOAD = 3kΩ
ONE TRANSMITTER SWITCHING
AT DATA RATE, OTHER
TRANSMITTERS AT 1/8
DATA RATE
460kbps
240kbps
20kbps
LIN TO LOUT t
PD
MAX3388E toc05
200ns/div
R
PULLUP
= 1kΩ
LOUT
1V/div
LIN
45
50
60
55
65
70
0 1.00.5 1.5 2.0 2.5
ON-RESISTANCE
vs. SWIN VOLTAGE
MAX3388E toc06
V
SWIN
(V)
R
ON
(Ω)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C