Datasheet
MAX3130/MAX3131
3V to 5.5V, IrDA Infrared Transceiver with
Integrated RS-232 Interface
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ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= AV
CC
= 3.0V to 5.5V, GND = AGND = PGND, C1–C4 = 0.1µF (Note 1), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25°C and V
CC
= AV
CC
= 3.3V.)
Data rate = 2.4kbps
Data rate = 115kbps
AV
CC
= 3.3V
IR Receiver Disable Time Delay until I
AVCC
< 1µA 10 µs
IR Receiver Enable Time Delay until maximum IR receive data rate is valid 300 µs
IR Receiver Output Pulse Width
BAUD16 = static
(Note 3)
190
µs
AV
CC
= 5V
1 1.6 8
IR TRANSMITTER
Transmitter Rise Time 10% to 90% of 200mA drive current 20 600 ns
Transmitter Fall Time 90% to 10% of 200mA drive current 20 600 ns
Transmitter Output Resistance I
OUT
= 200mA
1.15 2
Ω
0.9 1.6
µs
Off-Leakage Current
1.43 2.23
V
LEDC
= 5.5V
t
PHL
t
PLH
0.01 10.0 µA
IrDA ENCODER/DECODER (ENDEC)
Maximum Operating Frequency Maximum frequency at BAUD16 2 MHz
IR Output Pulse Width f
BAUD16
= 1.8432MHz, measured at V
LEDC
BAUD16 Operating Frequency Range f
BAUD16
required to enable ENDEC 34.6 2000 kHz
RS-232 RECEIVER
Input Voltage Range -25 25 V
Input Threshold Low
V
CC
= 3.3V 0.6 1.2
V
V
CC
= 5V 0.8 1.5
Input Threshold High
V
CC
= 3.3V 1.5 2.4
V
V
CC
= 5V 1.8 2.4
Input Hysteresis 0.3 V
Input Resistance T
A
= +25°C 357kΩ
Receiver Propagation Delay
R_IN to R_OUT,
C
L
= 150pF
300
ns
300
Receiver Skew
t
PHL
- t
PLH
, C
L
= 150pF
300 ns
RS-232 TRANSMITTER OUTPUTS
Output Voltage Swing T1OUT, T2OUT, loaded with 3kΩ to GND ±5 ±5.4 V
Output Resistance V
CC
= V+ = V- = 0, T_OUT = ±2V 300 10M Ω
Output Short-Circuit Current V
T_OUT
= 0 ±35 ±60 mA
Output Leakage Current
V
T_OUT
= ±12V, V
CC
= 0 to 5.5V,
RS-232 transceiver shutdown
±25 µA
Maximum Data Rate R
L
= 3kΩ, CL = 1000pF, one transmitter switching 120 235 kbps
Transmitter Skew
t
PHL
- t
PLH
300 ns
PARAMETER CONDITIONS MIN TYP MAX UNITS
IR TRANSMITTER
IrDA ENCODER/DECODER (ENDEC)
RS-232 RECEIVER
RS-232 TRANSMITTER OUTPUTS