MAX3311 Maxim, MAX3311 Datasheet - Page 6

• Manufacturer Part Number: MAX3311
• Description: 460kbps / 1A Supply Current / RS-232-Compatible Transceivers in MAX
• Manufacturer: Maxim

460kbps, 1µA Supply Current,
RS-232-Compatible Transceivers in µMAX
Figure 2. Loopback Test Circuit
Figure 4. Loopback Test Results at 250kbps
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.
+5V
0.1µF
C1
TIN
ROUT
6
C1+
C1-
_______________________________________________________________________
2µs/div
MAX3311
MAX3313
GND
V
CC
High Data Rates
TOUT
5kΩ
RIN
V-
C2
1000pF
TIN
TOUT
ROUT
Figure 3. Loopback Test Results at 120kbps
Figure 5. Receiver Positive/Negative Thresholds for INVALID
+2.7V
+0.3V
-0.3V
-2.7V
0
INDETERMINATE
INDETERMINATE
5µs/div
INVALID HIGH
INVALID HIGH
INVALID LOW
TIN
TOUT
ROUT