Datasheet

MAX212
+3V-Powered, Low-Power,
True RS-232 Transceiver
_______________________________________________________________________________________ 3
TIMING CHARACTERISTICS
(V
CC
= 3.0V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER MIN TYP MAX UNITS
Transmitter Output Disable Time 600 ns
250 µs
Receiver Output Enable Time 70 200 ns
Receiver Output Disable Time 420 700 ns
CONDITIONS
Includes power-supply start-up
Receiver Propagation Delay
300 700
ns150pF load
800 2000
Transmitter Propagation Delay
800 2000
ns
2500pF  3kΩ load
300 700
SYMBOL
t
PLHR
t
PHLT
t
PLHT
t
DT
t
PHLR
t
ET
t
ER
t
DR
Transmitter Output Enable Time
4.0 10 30 V/µs
R
L
= 3kΩ to 7kΩ, C
L
= 50pF to 2500pF,
measured from +3V to -3V or -3V to +3V
Transition-Region Slew Rate
__________________________________________Typical Operating Characteristics
(V
CC
= 3.3V, T
A
= +25°C, unless otherwise noted.)
0204060
DATA RATE (kbps)
SUPPLY POWER (mW)
60
80
120
140
180
160
SUPPLY POWER vs.
DATA RATE
100
212 GR4
2500pF
1000pF
2500pF
80
ALL TRANSMITTERS
LOADED w/ 3kΩ AND
STATED CAPACITANCE
120
100
1000pF
3 TRANSMITTERS
AT DATA RATE
3 TRANSMITTERS,
1 AT DATA RATE,
1 LOW, 1 HIGH
0 50 100 150
DATA RATE (kbps)
OUTPUT VOLTAGE (V)
-6
-4
0
2
6
4
TRANSMITTER OUTPUT VOLTAGE vs.
DATA RATE
212 GR5
5000pF
4000pF
2500pF
1000pF
200
250
-2
4000pF
2500pF
1000pF
5000pF
ALL TRANSMITTERS
LOADED SIMULTANEOUSLY
w/ SPECIFIED CAPACITANCE AND 3kΩ
Data Rate 120 250 kbps
1000pF  3kΩ load on each transmitter,
150pF load on each receiver