MAX3131EAI-T Maxim Integrated, MAX3131EAI-T Datasheet - Page 7

• Manufacturer Part Number: MAX3131EAI-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3130, MAX3131r

Specifications of MAX3131EAI-T

• Data Rate: 120 Kbps
• Operating Supply Voltage: 3 .3 V, 5 V
• Supply Current: 0.1 mA
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Function: Transceiver
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 2
• Number Of I/os: 8
• Number Of Receivers: 2
• Propagation Delay Time Ns: 0.3 us
• Shutdown: Yes

MAX3130
11, 18
12
13
14
15
16
17
19
20
21
22
23
24
25
26
27
28
—
10
3
4
5
6
7
8
9
PIN
MAX3131
3V to 5.5V, IrDA Infrared Transceiver with
11, 18
10
12
13
14
15
16
17
19
20
21
22
23
24
25
26
27
28
—
3
4
5
6
7
8
9
_______________________________________________________________________________________
IRMODE
BAUD16
R1OUT
T1OUT
T2OUT
R2OUT
NAME
AGND
PGND
LEDC
RSSD
AV
R1IN
GND
PINC
IRSD
R2IN
T2IN
N.C.
C1+
C2+
TXD
V
C1-
C2-
V+
V-
CC
CC
TTL/CMOS RS-232 Transmitter Input. For the MAX3130, drive IRMODE low to connect
T2IN to the IR transmitter input, and drive IRMODE high to connect T2IN to the RS-232
transmitter input. For the MAX3131, T2IN is always connected to the RS-232 transmitter
input.
IR Mode Control. Drive IRMODE low to connect R2OUT to the IR receiver output and
T2IN to the IR transmitter input. Driving IRMODE low also shuts down the RS-232
charge pump and puts the RS-232 transmitter outputs in a high-impedance state. Drive
IRMODE high to connect R2OUT to the RS-232 receiver output and connect T2IN to the
RS-232 transmitter input.
IR Transmitter TTL/CMOS Data Input
TTL/CMOS RS-232 Receiver Output
RS-232 Receiver Input
RS-232 Transmitter Output
16-Times Baud-Rate Input. To use the ENDEC, apply a signal that is 16 times the baud
rate into BAUD16. Connect BAUD16 to GND or V
Ground
3.0V to 5.5V Supply Voltage
No Connection. Do not make connections to these pins.
Analog Supply Voltage V
Analog Ground for IR Signal Processing. Connect to GND.
Silicon PIN Photodiode Input. Connect PINC to the cathode of the PIN photodiode.
Connect the anode of the PIN photodiode to GND.
Shutdown Input for the IrDA Transceiver Circuitry
Power Ground for IR LED Driver. Connect to GND.
Open-Drain Output for Driving the IR LED. Connect LEDC to the cathode of the IR LED.
+5.5V Generated by the Internal Charge Pump
Positive Terminal of the Voltage-Doubling Charge-Pump Capacitor
Negative Terminal of the Voltage-Doubling Charge-Pump Capacitor
Positive Terminal of the Inverting Charge-Pump Capacitor
Negative Terminal of the Inverting Charge-Pump Capacitor
-5.5V Generated by the Internal Charge Pump
Shutdown Input for the RS-232 Transmitters and Charge Pump
RS-232 Transmitter Output
RS-232 Receiver Input
TTL/CMOS RS-232 Receiver Output. For the MAX3130, drive IRMODE low to connect
R2OUT to the IR receiver output, and drive IRMODE high to connect R2OUT to the
RS-232 receiver output. For the MAX3131, R2OUT is always internally connected to the
RS-232 receiver output.
Integrated RS-232 Interface
CC
for IR Signal Processing. AV
FUNCTION
Pin Description (continued)
CC
to disable the ENDEC.
CC
range is 3.0V to 5.5V.
7