Datasheet

MAX3311/MAX3313
High Data Rates
The MAX3311/MAX3313 maintain RS-232-compatible
transmitter output voltage (±3.7V minimum) even at
high data rates. Figure 2 shows a transmitter loopback
test circuit. Figure 3 shows the loopback test result at
120kbps, and Figure 4 shows the same test at
250kbps.
460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
6 _______________________________________________________________________
Figure 2. Loopback Test Circuit
C1
C2
0.1µF
V-
TOUT
TIN
ROUT
1000pF
RIN
V
CC
GND
5kΩ
+5V
MAX3311
MAX3313
C1+
C1-
Figure 4. Loopback Test Results at 250kbps
2µs/div
TOUT
TIN
ROUT
Figure 3. Loopback Test Results at 120kbps
5µs/div
TOUT
TIN
ROUT
Figure 5. Receiver Positive/Negative Thresholds for INVALID
RECEIVER INPUT LEVELS
-2.7V
-0.3V
+2.7V
+0.3V
0
INDETERMINATE
INVALID HIGH
INVALID LOW
INVALID HIGH
INDETERMINATE