Datasheet

MAX3320A/B/L/T
3V to 5.5V, up to 250kbps True RS-232 Transceiver
with 4µA AutoShutdown Plus and Power-On Reset
4 _______________________________________________________________________________________
-7.5
V
T_OUT-
V
T_OUT+
-2.5
-5.0
2.5
0
5.0
7.5
0 20001000 3000 4000 5000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3320 TOC01
LOAD CAPACITANCE (pF)
OUTPUT VOLTAGE (V)
ONE TRANSMITTER AT 250kbps
ONE TRANSMITTER AT 15.6kbps
LOAD = 3kΩ + C
L
0
2
8
6
4
10
12
0 20001000 3000 4000 5000
SLEW RATE
vs. LOAD CAPACITANCE
MAX3320 TOC02
LOAD CAPACITANCE (pF)
SLEW RATE (V/us)
ONE TRANSMITTER AT 250kbps
ONE TRANSMITTER AT 15.6kbps
LOAD = 3kΩ + C
L
NEGATIVE
SLEW
POSITIVE
SLEW
0
250kbps
120kbps
20kbps
10
5
30
20
25
15
40
35
45
0 20001000 3000 4000 5000
SUPPLY CURRENT
vs. LOAD CAPACITANCE WHEN
TRANSMITTING DATA
MAX3320 TOC03
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
ONE TRANSMITTER AT
FULL DATA RATE INDICATED
ONE TRANSMITTER AT
1/16 DATA RATE INDICATED
TIMING CHARACTERISTICS
(V
CC
= 3V to 5.5V, C1–C4 = 0.1µF, C1–C4 = 0.1µF (for 3.3V ±10%), C1 = 0.047µF, C2–C4 = 0.33µF (tested at 5V ±10%),
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
kbps250
R
L
= 3kΩ, C
L
= 1000pF, one transmitter switching
Maximum Data Rate
ns100
|
t
PHL
- t
PLH
|
Transmitter Skew
0.3
µs
0.3
R_IN to R_OUT, C
L
= 150pFReceiver Propagation Delay
UNITSMIN TYP MAXCONDITIONSPARAMETER
t
PLH
t
PHL
ns200
|
t
PHL
- t
PLH
|
Receiver Skew
C
L
= 150pF to
1000pf
V/µs
6 30
V
CC
= 3.3V, R
L
= 3kΩ to 7kΩ,
measured from +3V to -3V or -3V to
+3V, T
A
= +25°C
Transition-Region Slew Rate
ms100 280V
CC
= reset threshold
RESET Active Timeout Period
µs40100mV overdrive from reset threshold
V
CC
to RESET Delay
C
L
= 150pF to
2500pf
4 30
__________________________________________Typical Operating Characteristics
(V
CC
= 3.3V, 250kbps data rate, C1–C4 = 0.1µF, all transmitters loaded with 3kΩ. Typical values are at T
A
= +25°C, unless
otherwise noted.)