Datasheet

2
Applications
• Mobile Telecom
– Cellular Phones
– Pagers
– Smart Phones
• Data Communication
– PDAs
– Portable Printers
• Digital Imaging
– Digital Cameras
– Photo-Imaging Printers
Description
The HSDL-3201 is one of a new
generation of low-cost Infrared
(IR) transceiver modules from
Agilent Technologies. It features
the smallest footprint in the
industry at 2.5 H x 8.0 W x 3.0 D
mm. Although the supply voltage
can range from 2.7 V to 3.6 V,
the LED drive current is
internally compensated to a
constant 32 mA to assure that
link distances meet the IrDA Data
1.2 (low power) physical layer
specifications.
The HSDL-3201 meets the 20 cm
link distance to other IrDA 1.2
low power devices, and a 30 cm
link distance to IrDA 1.2 standard
devices.
I/O Pins Configuration Table
Pin Symbol Description Notes
1 GND Ground Connect to system ground.
2 NC No Connection This pin must be left
unconnected.
3V
CC
Supply Voltage Regulated: 2.7 to 3.6 Volts
4 AGND Analog Ground Connect to a “quiet”
ground.
5 SD Shut Down This pin must be driven
Active High either high or low. Do NOT
float the pin.
6 RXD Receiver Data Output is a low pulse for
Output. Active Low. 2.4 µs when a light pulse
is seen.
7 TXD Transmitter Data Logic high turns the LED
Input. Active High. on. If held high longer than
~ 20 µs, the LED is turned
off. TXD must be driven
high or low. Do NOT float
the pin.
8 VLED LED Voltage May be unregulated: 2.7 to
6.0 volts.
- SHIELD EMI Shield Connect to system ground
via a low inductance trace.
For best performance, do
not directly connect to
GND or AGND at the part.
Application Circuit
HSDL-3201#021/001/011
Pinout, Rear View
VLED
TXD
7
LED
CURRENT
SOURCE
RXD
6
SHUT DOWN
5
RX PULSE
SHAPER
TXD
8 VLED
4 AGND
SD
RXD
V
CC
3
V
CC
2
NC
1 GND
C1
1.0 µF
SHIELD
87654321
HSDL-3201#008/018
Pinout, Rear View
87654321