MAX13223E
±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver
4 _______________________________________________________________________________________
Note 2: All devices are 100% production tested at T
A
= +85°C. Specifications are over -40°C to +85°C and are guaranteed by design.
Note 3: Both receivers will operate over the ±70V input range. The input resistance increases with input voltage. The input resistance
will increase within 24V ≤ |V
R_IN
| ≤ 32V.
Note 4: Guaranteed by design, not production tested.
Note 5: Transmitter skew is measured at the transmitter zero crosspoints.
Note 6: Output recovery time is the delayed time for the transmitter to enter normal operating mode after an overvoltage condition.
TIMING CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless other-
wise noted. For V
CC
= +3.0V to +3.6V, C1 = C2 = C3 = 0.1µF, C4 = 1µF. For V
CC
= +4.5V to +5.5V, C1 = 47nF, C2 = C3 = 330nF,
C4 = 1µF.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Maximum Data Rate DR
R
L
= 3k, C
L
= 1000pF, one transmitter
switching, Figure 1
250 kbps
Receiver Positive or Negative
Threshold to INVALID High
t
INVH
V
CC
= 5V, Figure 6b 1 μs
Receiver Positive or Negative
Threshold to INVALID Low
t
INVL
V
CC
= 5V, Figure 6b 30 μs
Receiver Edge to Transmitters
Enabled
t
WU
V
CC
= 5V, Figure 6b 135 μs
Receiver-Output Enable Time t
RX,EN
Normal operation 200 ns
Receiver-Output Disable Time t
RX,DIS
Normal operation 200 ns
Receiver Skew |t
PRHL
- t
PRLH
| 50 ns
Transmitter Skew |t
PTHL
- t
PTLH
| (Note 5) 200 ns
t
PRHL
0.3
Receiver Propagation Delay
t
PRLH
C
L
= 150pF, Figure 4
0.3
μs
t
PTHL
0.8
Transmitter Propagation Delay
t
PTLH
C
L
= 1nF, R
L
= 3k, Figure 3
0.6
μs
Transmitter Fall Time or Rise
Time
t
R
, t
F
Figure 3 0.3 μs
Transmitter Time to Exit
Shutdown
t
SHDN
Figure 7 100 μs
Output Recovery Time t
TX,REC
C
L
= 1nF, R
L
= 5k (Note 6) 100 μs
Transition-Region Slew Rate SR
OUT
V
CC
= +3.3V, R
L
= 3k to 7k, T
A
= +25°C,
measured from +3V to -3V or -3V to +3V,
one transmitter switching, C
L
= 1nF
6 30 V/μs
