Datasheet

ns
MAX3233E/MAX3235E
4 _______________________________________________________________________________________
TIMING CHARACTERISTICS
(V
CC
= +3.0V to +3.6V for MAX3233E, V
CC
= +4.5V to +5.5V for MAX3235E; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.)
Note 2: A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
Note 3: Transmitter skew is measured at the transmitter zero cross points.
C
L
= 150pF
to 2500pF
C
L
= 150pF
to 1000pF
R_IN to R_OUT,
C
L
= 150pF
R
L
= 3kΩ, C
L
= 1000pF,
one transmitter switching
V
CC
= 3.3V (MAX3233E),
V
CC
= 5.0V (MAX3235E),
T
A
= +25°C,
R
L
= 3kΩ to 7kΩ,
measured from +3V to -3V
or -3V to +3V
Normal operation
Normal operation
(Note 4)
CONDITIONS
100
ns
70
t
PHL
kbps250Maximum Data Rate
Receiver Propagation Delay
V/µs
430
630
Transition-Region Slew Rate
ns200Receiver Output Enable Time
ns200Receiver Output Disable Time
ns150
⏐
t
PHL
- t
PLH ⏐
Transmitter Skew
ns
180
⏐
t
PHL
- t
PLH ⏐
Receiver Skew
UNITSMIN TYP MAXSYMBOLPARAMETER
-10.0
-7.5
V
OUT
-
V
OUT
+
-5.0
-2.5
0
2.5
5.0
7.5
10.0
0 1000 2000 3000 4000 5000
TRANSMITTER OUTPUT VOLTAGE vs.
LOAD CAPACITANCE
MAX3233E/35Etoc01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
0
10
5
25
20
15
40
35
30
45
0 20001000 3000 4000 5000
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3233E/35E toc02
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
TRANSMITTER 1 AT DATA RATE
TRANSMITTER 2 AT 1/16 DATA RATE
20kbps
120kbps
250kbps
0
2
4
6
8
10
12
14
16
0 1000 2000 3000 4000 5000
SLEW RATE vs.
LOAD CAPACITANCE
MAX3233E/35Etoc01
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
SLEW RATE -
SLEW RATE +
Note 4: Transmitter skew is measured at the transmitter zero crosspoints.
__________________________________________Typical Operating Characteristics
(V
CC
= +3.3V for MAX3233E, V
CC
= +5.0V for MAX3235E; 250kbps data rate; all transmitters loaded with 3kΩ and C
L
; T
A
= +25°C,
unless otherwise noted.)
±15kV ESD-Protected, 1µA, 250kbps, 3.3V/5V, Dual
RS-232 Transceivers with Internal Capacitors
150
250
t
PLH
MAX3233E
MAX3235E
MAX3233E
MAX3235E
50MAX3235E
MAX3233E