MAX3120 19-1390 Rev 0 10/98 Low-Profile, 3V, 120A, IrDA Infrared Transceiver General Description Features The MAX3120 IrDA 1.2-compatible infrared transceiver IrDA 1.2 Compatible: 2.4kbps to 115.2kbps is optimized for battery-powered, space-constrained applications. It consumes only 120A while supporting +3V to +5.5V Single-Supply Operation data rates up to 115kbps over a wide 3V to 5.5V oper- ating range, and features a 10nA shutdown mode to Flexible Optics Selection and Layout further extend battery life. 120A Supply Current The MAX3120 reduces the space required for IrDA applications by requiring a minimum of external compo- 10nA Shutdown Supply Current nents: photodiode, infrared LED, and current-setting resistor. Optical components are external to allow maxi- 200mA, High-Current Infrared LED Drive mum flexibility in PC board design. The MAX3120 is available in 8-pin MAX and SO packages. The MAX package consumes half the board space of an 8-pin SO. Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX3120CUA 0C to +70C 8 MAX MAX3120CSA 0C to +70C 8 SO Applications MAX3120EUA -40C to +85C 8 MAX IrDA Applications MAX3120ESA -40C to +85C 8 SO Personal Digital Assistants (PDAs) Palmtop Computers Cell Phones Hand-Held Equipment Typical Operating Circuit Peripherals +3.3V Pin Configuration V CC V SHDN CC CS LED TOP VIEW TX LEDC SCLK TXD DIN DOUT MAX3100 MAX3120 TXD 1 8 RXD RX RXD PINC V 2 7 LEDC CC MAX3120 GND 3 6 PGND PINC 4 5 SHDN GND GND PGND PIN DIODE MAX/SO Maxim Integrated Products 1 For free samples & the latest literature: Low-Profile, 3V, 120A, IrDA Infrared Transceiver ABSOLUTE MAXIMUM RATINGS (Referred to GND) Continuous Power Dissipation (T = +70C) A V ...........................................................................-0.3V to +6V MAX (derate 4.1mW/C above +70C) ....................330mW CC TXD, SHDN, LEDC ...................................................-0.3V to +6V SO (derate 5.88mW/C above +70C).......................471mW RXD ............................................................-0.3V to (V + 0.3V) Operating Temperature Ranges CC PGND ....................................................................-0.1V to +0.1V MAX3120C A....................................................0C to +70C PINC....................................................................................10mA MAX3120E A.................................................-40C to +85C Continuous LEDC Current.................................................200mA Junction Temperature......................................................+150C Repetitive Pulsed LEDC Current Storage Temperature Range .............................-65C to +160C (<90s, duty cycle <20%) ..........................................500mA Lead Temperature (soldering, 10sec) .............................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.0V to +5.5V, T = T to T , unless otherwise noted. Typical values are at T = +25C and V = +3.3V.) CC A MIN MAX A CC PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Supply Current I T = +25C, SHDN = V (Note 1) 120 200 A CC A CC Shutdown Supply Current I T = +25C, SHDN = GND (Note 1) 0.01 1.0 A CC(SHDN) A LOGIC INPUTS (TXD, SHDN) Input Logic Threshold Low V 0.8 V IL V = 3.3V 2.0 CC Input Logic Threshold High V V IH V = 5.0V 2.4 CC Input Leakage Current I -1 1 A LEAK Input Capacitance C 2 pF IN LOGIC OUTPUT (RXD) V I = 200A 0.1 0.4 OL SINK Output Voltage V V -V - CC CC V I = 100A OH SOURCE 0.5 0.05 Output Rise and Fall Time t , t C = 50pF 50 ns r f LOAD IR RECEIVER Supported Data Rates 2.4 115.2 kbps Equivalent Input Noise Current I (Note 2) 10 nA NOISE RMS Input Current Sensitivity (Note 3) 0.0002 6 mA V = 3.3V 100 CC Ambient DC Current Rejection A V = 5.0V 375 CC Shutdown Time Delay until I < 1A 10 s CC Delay until maximum IR receiver data rate is Shutdown Disable Time 300 s valid Data rate = 2.4kbps 190 IR Receiver Output Pulse Width s Data rate = 115.2kbps 18 2 MAX3120