19-1390; Rev 0; 10/98
Low-Profile, 3V, 120碌A(chǔ),
IrDA Infrared Transceiver
General Description
The MAX3120 IrDA 1.2-compatible infrared transceiver
is optimized for battery-powered, space-constrained
applications. It consumes only 120碌A(chǔ) 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 碌MAX and SO packages. The 碌MAX
package consumes half the board space of an 8-pin
SO.
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
120碌A(chǔ) Supply Current
o
10nA Shutdown Supply Current
o
200mA, High-Current Infrared LED Drive
MAX3120
Ordering Information
PART
MAX3120CUA
MAX3120CSA
MAX3120EUA
MAX3120ESA
TEMP. RANGE
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
8 碌MAX
8 SO
8 碌MAX
8 SO
Applications
IrDA Applications
Personal Digital Assistants (PDAs)
Palmtop Computers
Cell Phones
Hand-Held Equipment
Peripherals
Typical Operating Circuit
+3.3V
Pin Configuration
TOP VIEW
CS
SCLK
DIN
DOUT
V
CC
V
CC
SHDN
LED
TX
TXD
LEDC
MAX3100
RX
MAX3120
RXD
PINC
TXD
V
CC
GND
PINC
1
2
3
4
8
RXD
LEDC
PGND
SHDN
GND
GND
PGND
PIN
DIODE
MAX3120
7
6
5
碌MAX/SO
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Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.