HSDL-3201 Ver la hoja de datos (PDF) - LiteOn Technology
Número de pieza
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Fabricante
HSDL-3201 Datasheet PDF : 20 Pages
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Notes:
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 µs.
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 µs, independent of data rate.
6. RXD Logic High during shutdown is a weak pullup resistor (300 kΩ).
7. An in-band optical signal is a pulse/sequence where the peak wavelength, lp, is defined as 850 nm ≤ lp ≤ 900 nm, and the pulse characteristics
are compliant with the IrDA Serial Infrared Physical Layer Link Specification.
8. For in band signals ≤115.2 Kb/s where 8.1 µW/cm2 ≤ EI ≤ 500 mW/cm2.
9. Latency is defined as the time from the last TXD light output pulse until the receiver has recovered full sensitivity.
10. Receiver wake up time is measured from the SD pin high to low transition or VCC power on, to a valid RXD output.
11. Transmitter wake up time is measured from the SD pin high to low transition or VCC power on, to a valid light output in response to a TXD pulse.
12. Typical values are at EI = 10 mW/cm2
13. Maximum value is at EI = 500 mW/cm2.
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 supply current for 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 VCC pin by the
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.
Distances between Units to
See a 10 mW/cm2 Light
Level
Type of
Transceiver
Typical HSDL-3201
Max. Brightness
HSDL-3201
Typical SIR
Typical FIR
Distance (cm)
1.0
1.7
2.0
3.2
The 500 mW/cm2 light level is for the
maximum brightness IrDA unit at 1
cm.
34.0
VLED = 3.6 VOLTS
33.5
33.0
32.5
32.0
31.5
31.0
2.7
2.8 F2ig.9ur3e.01.3L.1ED3.2cu3rr.3en3t.4vs3..V5C3C..6
VCC – VOLTS
Figure 1. LED current vs. VCC.
34.0
VCC = 3.6 VOLTS
33.5
33.0
VCC = 3.3 VOLTS
32.5
VCC = 3.0 VOLTS
32.0
31.5
VCC = 2.7 VOLTS
31.0
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3F.5ig3u.r6e 2. LED current vs. VLED.
VLED – VOLTS
Figure 2. LED current vs. VLED.
6
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