HSDL-3021-021 Lite-On Electronics, HSDL-3021-021 Datasheet - Page 24

• 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

Bandwidth Selection Timing
The power on state should be the IrDA SIR mode. The data
transfer rate must be set by a program-ming sequence
using the TxD_IR and SD inputs as described below.
Note: SD should not exceed the maximum, t
shutdown.
Setting to the High Bandwidth MIR/FIR Mode
(0.576 Mbits/s to 4 Mbits/s)
1. Set SD input to logic “HIGH. ” Wait t
2. Set TxD_IR input to logic “HIGH. ” Wait t
3. Set SD to logic “LOW” (this negative edge latches state
4. After waiting t
Setting to the Low Bandwidth SIR Mode
(2.4 kbits/s to 115.2 kbits/s)
1. Set SD input to logic “HIGH. ”
2. Set TxIR input to logic “LOW. ” Wait t
3. Set SD to logic “LOW” (this negative edge latches state
4. TxIR must be held for t
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Data subject to change. Copyright © 2007 Lite-On Technology Corporation. All rights reserved.
TxIR
of TxD_IR, which determines speed setting).
“LOW. ” TxD_IR is now re-enabled as normal IrDA
transmit input for the High Bandwidth MIR/FIR mode.
of TxIR, which determines speed setting).
as normal IrDA transmit input for the Low Bandwidth
SIR mode.
SD
50%
t
A
50%
H
≥ 50 ns TxD_IR can be set to logic
t
C
S
t
S
≥ 50 ns. TxIR is now re-enabled
50%
t
H
A
S
≥ 50 ns.
≥ 200 ns.
C
≤ 5 µs, to prevent
50%
S
≥ 50 ns.
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HIGH: MIR/FIR
LOW: SIR
Power-Up Sequencing
To have a proper operation for HSDL-3201, the following
power-up sequencing must be followed.
a) It is strongly recommended that V
b) It is not recommended to turn on IOV
c) Setting IOV
IOV
Note:
t
t
t
to IOV
IOV
while SD is low. However, for application that IOV
comes prior to V
set high to assure proper functionality.
IOV
bidden.
IOV
SDDL
SDPW
V
V
V
SD
CC
CC
SD
SD
CC
CC
CC
CC
CC
= SD delay time
DL
= shutdown input pulse width
CC
= IOV
.
CC
CC
high before V
delay time
CC
while SD is low, SD pin has to be
t
IOV
CC
CC
t
while SD is high is for-
SDDL ≥ 30 µs
t
DL ≥ 0 µs
SDDL ≥ 30 µs
CC
must come prior
CC
t
t
SDPW ≥ 30 µs
SDPW ≥ 30 µs
before V
CC
CC