Datasheet

2
Description
The HSDL-3201 is one of a new
generation of low-cost Infrared (IR)
transceiver modules from Avago
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 1.4 (low power) physical
layer specifications.
The HSDL-3201 meets the 20 cm link
distance to other IrDA 1.4 low power
devices, and a 30 cm link distance to
IrDA 1.4 standard devices.
Application Circuit
HSDL-3201#021 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 Pinout,
Rear View
87654321
Applications
• Mobile telecom
– Cellular phones
– Pagers
– Smart phones
• Data communication
– PDAs
– Portable printers
• Digital imaging
– Digital cameras
– Photo-imaging printers
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 either high or
Active High low. Do NOT float the pin.
6 RXD Receiver Data Output is a low pulse for 2.4 μs
Output. Active Low. when a light pulse is seen.
7 TXD Transmitter Data Logic high turns the LED on. If held
Input. Active High. 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.