TM6101/TR2
Device Selection Guide
Transmitter
Receiver
Operating
Mode
λp
Voltage
(Vcc)
Data Rate
Angle
Angle
Distance
Distance
2θ1/2
2θ1/2
850~900
nm
2.4~5.0
Volts
2.4K~4M
bps
TM6101/TR2
>1.0m
+/-15
>1.0m
+/-30
Pin Descriptions
Pin Symbol
Function
Description
I/O Active
1
2
3
4
5
LEDA
LEDC
TXD
LED Anode IRED anode, to be external connected to Vcc
through a current control resistor. Note: 1.
LED Cathode IRED cathode, internally connected to driver
transistor
Transmitter Logic High turn on the IrLED. Note: 2
I
High
Low
High
Data Input
RXD
Receiver Data Note: 3
Output
O
SD/Mode
Shutdown
Must be driven either high or low. Do Not float
the pin. Note: 4
6
7
Vcc
BC
Supply Voltage Supply Voltage from 2.4 to 5.0 Volts.
Bandwidth Logic Level: High is FIR, Low is SIR/MIR. If
Control
this pin is disconnected, the logic level is
determined by internal flip-flop. Note: 5
Connect to system ground
8
-
GND
Ground
Shield
EMI Shield Connect to system ground via a low inductance
trace. For best performance, don’t connect to
GND directly at the device.
Note 1: This is a constant 600mA (current sink). The output can be allowed to saturate and output
current can be limited by addition of resistor in series with the IrED. When using IrED
anode supplies above 3.3V a series resistor should be used to reduce thermal IR drop
across the transmitter driver.
Note 2: Asserting this pin turns on transmitter. Has 500Kohms pull down. This input is capacitive
coupled to limit transmit pulse width to about 70usec and is gated by the shutdown
function. The transmit pulse rise time must be faster than 1usec.
Everlight Electronics Co., Ltd.
Device No: DTM-611-001
http://www.everlight.com
Rev 1
Page: 3 of 12
Prepared Date: 07-21-2005
Prepared By: Stephen Wang