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IBM
IBM

IBM31T1100A Datasheet Preview

IBM31T1100A Datasheet

Integrated Infrared Transceiver Module

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IBM31T1100A pdf
IBM31T1100A
Integrated Infrared Transceiver Module
Highlights
x IrDA 1.1, HP-SIR and Sharp ASK compliant
x Supports IrDA data rates up to 4 Mbps
x Low profile (height = 5.6 mm max.)
x Minimum external components
x On-chip LED protection circuit
x Low power consumption
x 5 V Supply Voltage
x Complete differential receiver design
x Ambient light and noise rejection circuitry
x Shutdown pin for power management
x Programmable bandwidth control
x Compatible with all major Super I/Os
General Description
The IBM31T1100A is a multi-mode integrated
infrared (IR) transceiver module for data
communication systems. The transceiver supports
IrDA speeds up to 4 Mbps, HP-SIR and Sharp ASK
modes. Integrated into this tiny package is a
photodiode, LED and analog transceiver ASIC to
provide a total solution in a single package. A
current limiting resistor in series with the LED and
a Vcc bypass capacitor are the only external
components required to implement a complete
transceiver.
Package
Vcc
3
Noise
Rejection
Circuit
Amp
+
Comp
-
Driver
SD/BW 6
TX 7
BW
Control SD
logic
Block Diagram
4
GND
Driver
2
RX
Vcc
8
LEDA
1 LEDC




IBM
IBM

IBM31T1100A Datasheet Preview

IBM31T1100A Datasheet

Integrated Infrared Transceiver Module

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IBM31T1100A pdf
IBM31T1100A
Pin Assignments and Descriptions
LEDA
8
TX
7
SD/BW
6
NC
5
LED
Photodiode
1
LEDC
23
RX V CC
4
GND
Pin Pin Name
Description
I/O Active
1
LEDC
Indicates the state of the internal LED cathode. Normally not connected.
O Low
2 Indicates received serial data. It is a push-pull CMOS driver capable of driving a
RX
standard CMOS or TTL load. No external pull-up or pull-down resistor is required. May O
Low
switch indeterminately when the IBM31T1100A is transmitting.
P3 Vcc Connect to +5 V power supply. Place a 1.0-10 F ceramic bypass capacitor as close as
possible to this pin.
4
GND
Connect to ground of the power supply. A solid ground plane is recommended for proper
operation.
5 NC This pin is reserved for special application use only. No signal should be connected to
this pin.
6
SD/BW
This CMOS input is used to put the IBM31T1100A in shutdown mode. Nominal supply
Pcurrent draw in this mode is 35 A versus 5 mA in normal mode. Together with the TX
input, this pin also sets the receiver bandwidth. If TX is low when SD/BW transitions
I High
from high to low, the receiver bandwidth is optimized for operation up to 1.2 Mbps. If
TX is high when SD/BW transitions from high to low, the receiver bandwidth is
optimized for operation at 4 Mbps.
7 TX Used to transmit serial data when SD/BW is low. This CMOS input controls the LED
driver. An on-chip protection circuit disables the LED driver if TX is high for more than
P60 sec. This pin is also used to program the bandwidth of the receiver. See SD/BW pin
I
High
description.
8
LEDA
Connect this input to Vcc through a resistor to set the proper LED current. Add an
external LED in series to increase output intensity if required.
I
Guide Pins
Two through-hole guide pins provide mechanical stability during board mounting. They
(not shown above) also improve heat conduction when the part is in operation.
NOTE: The IBM31T1100A is pin and plug compatible with the Temic TFDS6000D.
2




IBM
IBM

IBM31T1100A Datasheet Preview

IBM31T1100A Datasheet

Integrated Infrared Transceiver Module

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IBM31T1100A pdf
IBM31T1100A
Electrical and Timing Specifications
Absolute Maximum Ratings
Symbol
VCC
PD
TJ
ILED
Parameter
Supply Voltage Range
Power Dissipation
Junction Temperature
Storage Temperature Range
Soldering Temperature
LED Current
Voltage at Any Pin
Min Typ Max Unit Condition
- 0.5 6 V
450 mW
125 °C
- 25 85 °C
240 °C See application notes
0.8 A <2 µs, ton<10%
- 0.5
Vcc+ 0.5
V
Recommended Operating Conditions
Symbol
VCC
TA
Parameter
Supply Voltage
Operating Temperature Range
Min Typ Max Unit Condition
4.5 5 5.5 V
0 70 °C
DC Electrical Characteristics
q rTA = 0 - 70 C, VCC = 5 V 10 %, unless otherwise specified
Symbol Parameter
Min Typ Max Unit Condition
ICC Dynamic Supply Current
5 7 mA SD = 0 V
ICC Standby Supply Current
ILED Repetitive Pulsed LED Current
VOL RX Output Voltage Low @ IOL = 2.5 mA
35 100 uA SD = VCC - 0.5, SC = NC
d0.55 A < 60 µs, ton 25 %
0.3 0.5
V
VOH RX Output Voltage High @ -IOH = 2.5 mA VCC - 0.5
V
VIL Input Voltage Low (TX, SD/BW) 0 0.8 V
VIH Input Voltage High (TX)
3.0
V
VIH Input Voltage High (SD/BW)
VCC - 0.5
V
IL Input Leakage Current
-10 +10 uA
CI Input Capacitance
5 pF
3




Part Number IBM31T1100A
Description Integrated Infrared Transceiver Module
Maker IBM
Total Page 8 Pages
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