MAX3111EEWI+TG36 Maxim Integrated Products, MAX3111EEWI+TG36 Datasheet - Page 25

• Manufacturer Part Number: MAX3111EEWI+TG36
• Description: IC UART SPI COMPAT 28-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX3111EEWI+TG36

• Features: Transceiver
• Number Of Channels: 1, UART
• Protocol: RS232, RS485
• Voltage - Supply: 3 V ~ 3.6 V
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX3110E/MAX3111E maintain the RS-232 ±5.0V
minimum transmitter output-voltage specification even
at the highest guaranteed data rate. Figure 10 shows a
transmitter loopback test circuit. Figure 11 shows a
loopback test result at 120kbps, and Figure 12 shows
the same test at 250kbps. For Figure 11, both transmit-
ters are driven simultaneously at 120kbps into an RS-
232 receiver in parallel with 1000pF. For Figure 12, a
single transmitter is driven at 250kbps, and both trans-
mitters are loaded with an RS-232 receiver in parallel
with 1000pF.
Figure 10. Loopback Test Circuit
Figure 11. Loopback Test Result at 120kbps
Protected RS-232 Transceivers with Internal Capacitors
R1OUT
T1OUT
T1IN
V
V
CC
CC
V
SPI/MICROWIRE-Compatible UART and ±15kV ESD-
CC
= 3.3V (MAX3111E), V
0.1μF
SHDN
C1+
C1-
C2+
C2-
T_ IN
R_ OUT
______________________________________________________________________________________
MAX3110E
MAX3111E
GND
V
2μs/div
CC
CC
= 5.0V (MAX3110E)
T_ OUT
5k
R_ IN
V+
V-
High Data Rates
1000pF
5V/div
5V/div
5V/div
The MAX3110E/MAX3111E can directly interface with
various 3.3V and 5V logic families, including ACT and
HCT CMOS. See Table 9 for more information on possi-
ble combinations of interconnections.
The MAX3110E/MAX3111E each contain a UART, two
RS-232 drivers, and two RS-232 receivers in one pack-
age. The standard RS-232 typical operating circuit is
shown in Figure 13.
Figure 12. Loopback Test Result at 250kbps
Figure 13. RS-232 Typical Operating Circuit
R1OUT
T1OUT
Interconnection with 3.3V and 5V Logic
T1IN
μP
232 SHUTDOWN
V
CC
= 3.3V (MAX3111E), V
100k
232 ACTIVE
V
CC
V
SHDN
IRQ
DIN
DOUT
SCLK
CS
TX
T1IN
RTS
T2IN
RX
R1OUT
CTS
R2OUT
CC
GND
CC
2μs/div
MAX3110E
MAX3111E
= 5.0V (MAX3110E)
Typical Applications
T1OUT
T2OUT
R1IN
R2IN
C1+
C2+
C1-
C2-
X1
X2
V+
V-
RS-232 I/O
5V/div
5V/div
5V/div
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