General Application Guide for
the HSDL-1100 4 Mb/s Infrared
Transceiver
Application Note 1112
HSDL-1100 Performance
Capability
Designed to Meet the IrDA Physical
Layer Specification version 1.1
鈥?Performance is guaranteed at
the 1.152 Mb/s and 4.0 Mb/s
data rates. The HSDL-1100 is
also backward compatible to
2.4-115.2 kb/s data rates as
required by the IrDA specifica-
tion.
鈥?Errorless 4 Mb/s performance
at link distances of 1.3-1.95
meters has been verified using
the HSDL-1100 and I/O chips
such as the National Semicon-
ductor PC87108, the VLSI
VL82C147, and the SMC
FDC37C957.
鈥?Nose-to-Nose (0-5 cm) error-
less performance has also been
verified for an Ir link using the
HSDL-1100 and I/O chips.
鈥?Sharp ASK/DASK errorless
performance on the Rxd-B
channel has been verified at
38.4 kb/s using the National
Semiconductor PC87108. Link
distance exceeded 2 meters
for typical HSDL-1100 units.
鈥?As with the HSDL-1000, the
one-piece package of the
HSDL-1100 allows the Ir
system designer to easily meet
all IrDA viewing angle
specifications.
鈥?Switching between IrDA data
rates is effortless as data is
always present at one of two
receiver outputs RxdA and
RxdB. Rxd-A provides 2.4-
115.2 kb/s data, and Rxd-B
provides 0.5-4 Mb/s data.
Capable of Receiving and Trans-
mitting Sharp ASK/DASK and TV
Remote
V
CC
CX7
鈥?The Rxd-B receiver channel
has been verified to correctly
receive Sharp ASK/DASK
500 kHz carrier for data rates
of 9.6 kb/s, 19.2 kb/s, and
38.4 kb/s. The National
Semiconductor PC87108 has
ASK/DASK capability on both
receive pins IRRX1 and IRRX2.
鈥?The Rxd-A receiver channel is
proven capable of receiving
RLED
CX2
10
HSDL-1100
TXD
R1
7
PIN
BIAS
V
REF
8
RXD-A
V
CC
CX6
R3
CX5
4
V
CC
THRESHOLD
AND
SQUELCH
GND
6
3
9
CX3
5
RXD-B
2
CX1
GND
1
CX4
Figure 1. HSDL-1100 Application Diagram.