HSDL-3021-021 Lite-On Electronics, HSDL-3021-021 Datasheet - Page 23

• Manufacturer Part Number: HSDL-3021-021
• Description: Infrared Transceivers IR Transceiver 4.0Mb/s
• Manufacturer: Lite-On Electronics

Specifications of HSDL-3021-021

• Wavelength: 885 nm
• Continual Data Transmission: 4 Mbit/s
• Transmission Distance: 50 cm
• Radiant Intensity: 10 mW/sr
• Half Intensity Angle Degrees: 30 deg to 60 deg
• Pulse Width: 4 us, 1.6 us
• Maximum Rise Time: 40 ns, 600 ns
• Maximum Fall Time: 40 ns, 600 ns
• Led Supply Voltage: 0 V to 6.5 V
• Operating Voltage: 2.4 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Dimensions: 8 mm x 3 mm x 2.5 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Appendix E: General Application Guide for the HSDL-3021
Remote Control Drive Modes
The HSDL-3021 can operate in the single-TxD program-
mable mode or the two-TxD direct transmission mode.
Single-TxD Programmable Mode
In the single-TxD programmable mode, only one input
pin (TxD_IR input pin) is used to drive the LED in both
IrDA mode as well as Remote Control mode of operation.
This mode can be used when the external controller uses
only one transmit pin for both IrDA as well RC mode of
operation.
The transceiver is in default mode (IrDA-SIR) when pow-
ered up. The user needs to apply the following program-
ming sequence to both the TxD_IR and SD inputs to
enable the transceiver to operate in either the IrDA or
remote control mode.
(ACTIVE HIGH)
(ACTIVE HIGH)
Mode Programming Timing Table
Parameter
The following timings describe input constraints required using the active serial interface for mode programming with pins SD,
TxIR, and TxRC:
Shutdown Input Pulse Width,
at Pin SD
SD Mode Setup Time
TxIR Pulse Width for RC Mode
SD Programming Pulse Width
Note: ( t
TxIR Setup Time for
SIR or MIR/FIR Mode
TxIR or SD Hold Time to Latch
SIR, MIR/FIR or RC Mode
23
SHUTDOWN
(GND)
TxRC
TxIR
A
+ t
SHUTDOWN
B
) < t
C
< t
t
TL
SDPW
IrDA LED
DRIVE
• • •
Symbol
t
t
t
t
t
t
SDPW
A
B
C
S
H
t
A
MODE
RC
t
t
C
B
Min
30
200
200
-
50
50
t
H
RC LED
t
DRIVE
• • •
H
Typ
-
-
-
-
-
-
RESET
Transceiver Control I/O Truth Table for Two-TxD Direct Transmission
Mode
SD
0
0
0
0
1
*The shutdown condition will set the transceiver to the default mode
Two-TxD Direct Transmission Mode
In the two-TxD direct transmission mode, the LED can
be driven separately for IrDA and RC mode of operation
through the TxD_IR and TxD_RC pins respectively. This
mode can be used when the external controller utilizes
separate transmit pins for IrDA and RC operation modes,
thereby eliminating the need for external multiplexing.
Please refer to the Transceiver I/O truth table for more
detail.
t
Max
∞
-
-
5.0
-
-
C
(IrDA-SIR)
IrDA LED
TxIR
0
0
1
1
0
t
DRIVE
• • •
H
Unit
µs
ns
ns
µs
ns
ns
TxRC
0
1
0
1
0
Notes
Will activate complete shutdown
Setup for mode programming
RC drive enabled with pin TxIR
Pulse width mode programming
Setup time for IrDA bandwidth selection
Hold time for IrDA or RC modes
LED
OFF
ON
ON
-
OFF
Remarks
IR Rx enabled. Idle mode
Remote control operation
IrDA Tx operation
Not recommended
(both transmitters off )
Shutdown mode*