HSDL-3201-021 Lite-On Electronics, HSDL-3201-021 Datasheet - Page 6

• Manufacturer Part Number: HSDL-3201-021
• Description: IRDA TX/RX 0.1152Mbps 3.3V 8-Pin T/R
• Manufacturer: Lite-On Electronics
• Type: TX/RXr

Specifications of HSDL-3201-021

• Maximum Communication Distance: 30 cm
• Half Intensity Angle Degrees: 60(Max)/30(Min) °
• Maximum Data Rate: 0.1152 Mbps
• Peak Wavelength: 875/880 nm
• Pulse Width: 1.6/2.45 us
• Radiant Intensity: 9 mW/sr
• Operating Supply Voltage: 2.7 to 3.6 V

Notes:
10. Receiver wake up time is measured from the SD pin high to low transition or V
11. Transmitter wake up time is measured from the SD pin high to low transition or V
12. Typical values are at EI = 10 mW/cm
13. Maximum value is at EI = 500 mW/cm
14. Current is due to internal stages of the LED current mirror. This current is in addition to the ILED current.
Notes on Supply Current
The
HSDL-3201 has two different
components, DC and AC.
The DC component is measured in
two states, normal (idle mode) and
shutdown. This current is present
whenever power is applied to the
part.
The AC component is either the extra
current drawn from the V
photodiode when it sees light, or the
current needed by the LED current
circuit. The values in the table are peak
values. Since IrDA data is transmitted
with a 3/16 duty cycle, the average
value is 3/16 of the peak. The AC
current is not drawn when no light is
present.
Figure 1. LED current vs. V
6
1. C1 must be placed within 0.7 cm of the HSDL-3201 to obtain optimum noise immunity.
2. If TXD is stuck in the high state, the LED will turn off after about 20 s.
3. RXD will echo the TXD signal while TXD is transmitting data.
4. In-Band IrDA signals and data rates 115.2 Kb/s.
5. RXD Logic Low is a pulsed response. The pulse width is 2.4 s, independent of data rate.
6. RXD Logic High during shutdown is a weak pullup resistor (300 k ).
7. An in-band optical signal is a pulse/sequence where the peak wavelength, lp, is defined as 850 nm
8. For in band signals 115.2 Kb/s where 8.1 W/cm
9. Latency is defined as the time from the last TXD light output pulse until the receiver has recovered full sensitivity.
34.0
33.5
33.0
32.5
32.0
31.5
31.0
are compliant with the IrDA Serial Infrared Physical Layer Link Specification.
2.7
supply
2.8
VLED = 3.6 VOLTS
Figure 1. LED current vs. V
2.9 3.0
V
CC
current
3.1
– VOLTS
3.2
CC
3.3
CC
.
pin by the
3.4
for
3.5
2
CC
2
the
3.6
.
.
Distances between Units to
See a 10 mW/cm
Level
Type of
Transceiver
Typical HSDL-3201
Max. Brightness
HSDL-3201
Typical SIR
Typical FIR
The 500 mW/cm
maximum brightness IrDA unit at 1
cm.
2
Figure 2. LED current vs. VLED.
34.0
33.5
33.0
32.5
32.0
31.5
31.0
EI 500 mW/cm
2.7
2.8
2.9 3.0
V
V
V
V
2
VLED – VOLTS
CC
CC
CC
CC
2
light level is for the
.
= 3.6 VOLTS
= 3.3 VOLTS
= 3.0 VOLTS
= 2.7 VOLTS
3.1
2
Distance (cm)
1.0
1.7
2.0
3.2
3.2
Light
CC
3.3
power on, to a valid RXD output.
CC
power on, to a valid light output in response to a TXD pulse.
3.4
3.5
Figure 2. LED current vs. VLED.
3.6
lp
900 nm, and the pulse characteristics