HSDL-3208-021 Lite-On Electronics, HSDL-3208-021 Datasheet - Page 3

• Manufacturer Part Number: HSDL-3208-021
• Description: Infrared Transceivers IR Transceiver 115Kb/s
• Manufacturer: Lite-On Electronics
• Type: TX/RXr

Specifications of HSDL-3208-021

• Wavelength: 875 nm, 880 nm
• Continual Data Transmission: 115.2 Kbit/s
• Radiant Intensity: 8 mW/sr
• Half Intensity Angle Degrees: 30 deg to 60 deg
• Pulse Width: 4 us, 1.6 us
• Maximum Rise Time: 50 ns, 600 ns
• Maximum Fall Time: 50 ns, 600 ns
• Led Supply Voltage: 0 V to 6.5 V
• Maximum Forward Current: 50 mA
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 7.4 mm x 2.9 mm x 1.8 mm
• Data Rate: 115.2Kbps
• Peak Wavelength: 875/880nm
• Angle Of Half Sensitivity: 60/30°
• Fall Time: 600/50ns
• Rise Time: 600/50ns
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (min): 2.4V
• Operating Supply Voltage (max): 3.6V
• Mounting: Surface Mount
• Pin Count: 7
• Operating Temp Range: -25C to 70C
• Operating Temperature Classification: Commercial
• Idle Current, Typ @ 25° C: 100µA
• Link Range, Low Power: 30cm
• Operating Temperature: -25°C ~ 70°C
• Orientation: Side View
• Shutdown: *
• Size: 7mm x 2.8mm x 1.6mm
• Standards: IrPHY 1.4
• Supply Voltage: 2.4 V ~ 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3
TX Power Mode Switching
The transceiver is in default High TX Power Mode
upon powered on. User needs to apply the following
programming sequence to both SD and TXD inputs
to switch the module to Low TX Power Mode. Both
settings of High TX Power and Low TX Power Mode
can be achieved as follows:
Figure 3. High power mode selection timing diagram.
1. Set SD/Mode input to logic High.
2. TXD input should remain at logic Low.
3. After waiting for t
4. Ensure that TXD input remains low for t
5. SD input pulse width for mode selection should be
SD/MODE
Low. The High to Low negative edge transition will
determine the TX Power Mode.
The transmitter is now in High mode.
> 50 ns.
TXD
50%
t
S
s
25 ns, set SD/Mode to logic
50%
t
H
50%
V
V
IH
IL
V
IL
H
100 ns.
SD/MODE
Figure 4. Low power mode selection timing diagram.
1. Set SD/Mode input to logic High.
2. After SD/Mode input remains High at > 25 ns, set
3. Then set SD/Mode to logic Low. The High to Low
4. After waiting for t
5. SD input pulse width for mode selection should be
TXD input to logic High, wait t
of TXD rising edge until 50% of SD falling edge).
negative edge transition will determine the TX
Power Mode.
logic Low.
> 50 ns.
TXD
50%
t
S
H
100 ns, set the TXD input to
50%
t
H
50%
V
V
IH
IL
s
25 ns (from 50%
V
V
IL
IH