MAX7318 19-3381 Rev 3 12/07 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection General Description Features 2 The MAX7318 2-wire-interfaced expander provides 16- 400kbps I C-Compatible Serial Interface bit parallel input/output (I/O) port expansion for SMBus 2V to 5.5V Operation 2 and I C applications. The MAX7318 consists of input port registers, output port registers, polarity inversion 5.5V Overvoltage-Tolerant I/Os 2 registers, configuration registers, and an I C-compatible Supports Hot Insertion serial interface logic compatible with SMBus. The sys- 16 I/O Pins that Default to Inputs on Power-Up tem master can invert the MAX7318 input data by writing to the active-high polarity inversion register. 100k Pullup on Each I/O Any of the 16 I/O ports can be configured as an input or Open-Drain Interrupt Output (INT) output. A power-on reset (POR) initializes the 16 I/Os Noise Filter on SCL/SDA Inputs as inputs. Three address select pins configure one of 64 slave ID addresses. 64 Slave ID Addresses Available The MAX7318 supports hot insertion. All port pins, the Low Standby Current (5.4A typ) INT output, SDA, SCL, and the slave address inputs AD02 remain high impedance in power-down (V+ = Polarity Inversion 0V) with up to 6V asserted upon them. 4mm 4mm, 0.8mm Thin QFN Package The MAX7318 is available in 24-pin SO, SSOP, TSSOP, -40C to +125C Operation and thin QFN packages and is specified over the -40C to +125C automotive temperature range. For applications requiring an SMBus timeout function, refer to the MAX7311 data sheet. Ordering Information Applications PKG PART TEMP RANGE PIN-PACKAGE CODE Servers MAX7318AWG -40C to +125C 24 Wide SO RAID Systems MAX7318AAG -40C to +125C 24 SSOP Industrial Control 24 Thin QFN Medical Equipment MAX7318ATG -40C to +125C T2444-4 (4mm 4mm) PLCs MAX7318AUG -40C to +125C 24 TSSOP Instrumentation and Test Measurement SMBus is a trademark of Intel Corp. Pin Configurations TOP VIEW 18 17 16 15 14 13 INT 1 24 V+ SCL 19 12 I/O10 AD1 2 23 SDA SDA 20 11 I/O9 AD2 3 22 SCL V+ 21 10 I/O8 I/O0 4 21 AD0 INT MAX7318ATG GND 22 9 MAX7318 I/O1 5 20 I/O15 AD1 23 8 I/O7 I/O2 6 19 I/O14 AD2 24 7 I/O6 I/O3 7 18 I/O13 12 3 4 5 6 I/O4 8 17 I/O12 I/O5 9 16 I/O11 THIN QFN I/O6 10 15 I/O10 I/O7 11 14 I/O9 GND 12 13 I/O8 TSSOP/SSOP/SO Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE I/O0 AD0 I/O1 I/O15 I/O2 I/O14 I/O3 I/O13 I/O4 I/O12 I/O5 I/O112-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection ABSOLUTE MAXIMUM RATINGS V+ to GND................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A I/O0I/O15 as Inputs....................................(GND - 0.3V) to +6V 24-Pin Wide SO (derate 11.8mW/C above +70C) ....941mW SCL, SDA, AD0, AD1, AD2, INT...................(GND - 0.3V) to +6V 24-Pin SSOP (derate 8.0mW/C above +70C) ...........640mW Maximum V+ Current......................................................+250mA 24-Pin TSSOP (derate 12.2mW/C above +70C) .......976mW 24-Pin Thin QFN (derate 20.8mW/C above +70C) .1667mW Maximum GND Current ...................................................-250mA Operating Temperature Range .........................-40C to +125C DC Input Current on I/O0I/O15.......................................20mA Junction Temperature......................................................+150C DC Output Current on I/O0I/O15 ....................................80mA Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+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. DC ELECTRICAL CHARACTERISTICS (V+ = 2V to 5.5V, T = -40C to +125C, unless otherwise noted. Typical values are at V+ = 3.3V, T = +25C.) (Note 1) A A PARAMETER SYMB O L CONDITIONS MINTYPMAXUNITS Supply Voltage V+ 2.0 5.5 V V+ = 2V 24 36 All I/Os unloaded, + Supply Current I V+ = 3.3V 45 62 A f = 400kHz SCL V+ = 5.5V 83 124 V+ = 2V 4.8 12.1 All I/Os unloaded, Standby Current I V+ = 3.3V 5.4 14.4 A STBY f = 0 SCL V+ = 5.5V 6.4 19.4 Power-On Reset Voltage V 1.4 1.7 V POR SCL, SDA 0.3 x V+ Input-Voltage Low V V IL Input-Voltage High V 0.7 x V+ V IH Low-Level Output Voltage V I = 6mA 0.4 V OL SINK Leakage Current I -1 +1 A L Input Capacitance 10 pF I/O Input-Voltage Low V 0.8 V IL Input-Voltage High V 1.8 V IH T = -40C to +85C includes internal A Input Leakage Current 1A pullup current, V = V+ IO Internal Pullup Current T = -40C to +85C, V = 0 34 100 A A IO V+ = 2V, V = 0.5V 8.5 17 OL Low-Level Output Current I V+ = 3.3V, V = 0.5V 17 32 mA SINK OL V+ = 5V, V = 0.5V 43 OL V+ = 3.3V, V = 2.4V 29 41 OH High Output Current I mA SOURCE V+ = 5V, V = 4.5V 31 OH AD0, AD1, AD2 Input-Voltage Low V 0.3 x V+ V IL Input-Voltage High V 0.7 x V+ V IH 2 MAX7318