MAX3120 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Low-Profile, 3V, 120uA, IrDA Infrared Transceiver

19-1390; Rev 0; 10/98
Low-Profile, 3V, 120µA,
IrDA Infrared Transceiver
General Description
The MAX3120 IrDA 1.2-compatible infrared transceiver
is optimized for battery-powered, space-constrained
applications. It consumes only 120µA while supporting
data rates up to 115kbps over a wide 3V to 5.5V oper-
ating range, and features a 10nA shutdown mode to
further extend battery life.
The MAX3120 reduces the space required for IrDA
applications by requiring a minimum of external compo-
nents: photodiode, infrared LED, and current-setting
resistor. Optical components are external to allow maxi-
mum flexibility in PC board design. The MAX3120 is
available in 8-pin µMAX and SO packages. The µMAX
package consumes half the board space of an 8-pin
SO.
Applications
IrDA Applications
Personal Digital Assistants (PDAs)
Palmtop Computers
Cell Phones
Hand-Held Equipment
Peripherals
Features
o IrDA 1.2 Compatible: 2.4kbps to 115.2kbps
o +3V to +5.5V Single-Supply Operation
o Flexible Optics Selection and Layout
o 120µA Supply Current
o 10nA Shutdown Supply Current
o 200mA, High-Current Infrared LED Drive
PART
MAX3120CUA
MAX3120CSA
MAX3120EUA
MAX3120ESA
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 SO
8 µMAX
8 SO
Typical Operating Circuit
Pin Configuration
TOP VIEW
CS
SCLK
DIN
DOUT
TXD 1
V_CC 2
GND 3
PINC 4
MAX3120
8 RXD
7 LEDC
6 PGND
5 SHDN
µMAX/SO
+3.3V
V_CC
TX
MAX3100
RX
GND
V_CC
SHDN
LED
TXD
LEDC
MAX3120
RXD
PINC
GND
PGND
PIN
DIODE
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