MAX7312 19-3057 Rev 3 4/05 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection General Description Features 2 The MAX7312 2-wire-interfaced expander provides 16-bit 400kbps I C-Compatible Serial Interface parallel input/output (I/O) port expansion in SMBus and 2V to 5.5V Operation 2 I C applications. The MAX7312 consists of input port 5V Overvoltage Tolerant I/Os registers, output port registers, polarity inversion regis- ters, configuration registers, a bus timeout register, and Supports Hot Insertion 2 an I C-compatible serial interface logic, compatible with 16 I/O Pins that Default to Inputs on Power-Up SMBus. The system master can invert the MAX7312 input Open-Drain Interrupt Output (INT) data by writing to the active-high polarity inversion regis- ter. The system master can enable or disable bus timeout Bus Timeout for Lock-Up-Free Operation by writing to the bus timeout register. Noise Filter on SCL/SDA Inputs Any of the 16 I/O ports can be configured as an input or 64 User-Selectable Slave ID Addresses an output. A power-on reset (POR) initializes the 16 I/Os Low Standby Current (2.9A typ) as inputs. Three address select pins configure the part to one of 64 slave ID addresses. Polarity Inversion The MAX7312 supports hot insertion. All port pins, the 4mm 4mm, 0.8mm Thin QFN Package INT output, SDA, SCL, and the slave address inputs -40C to +125C Operation AD0-2 remain high impedance in power-down (V = 0V) t Ordering Information up to 6V. The MAX7312 is available in 24-pin SO, SSOP, TSSOP, PKG PART TEMP RANGE PIN-PACKAGE CODE and thin QFN packages and is specified over the -40C to +125C automotive temperature range. MAX7312AWG -40C to +125C 24 Wide SO For applications requiring I/Os with integrated 100k MAX7312AAG -40C to +125C 24 SSOP pullup resistors, refer to the MAX7311 data sheet. 24 Thin QFN MAX7312ATG -40C to +125C T2444-4 Applications (4mm x 4mm) Servers/Blades MAX7312AUG -40C to +125C 24 TSSOP RAID Systems SMBus is a trademark of Intel Corp. Medical Equipment I, Ia Instrumentation and Test Measurement l- Networking ne I. Pin Configurations TOP VIEW + INT 1 24 V AD1 2 23 SDA 18 17 16 15 14 13 AD2 3 22 SCL SCL 19 12 I/O10 I/O0 4 21 AD0 SDA 20 11 I/O9 MAX7312 I/O1 5 20 I/O15 V+ 21 10 I/O8 I/O2 6 19 I/O14 MAX7312ATG INT GND 22 9 I/O3 7 18 I/O13 AD1 23 8 I/O7 I/O4 8 17 I/O12 AD2 I/O6 24 7 I/O5 9 16 I/O11 12 3 45 6 I/O6 10 15 I/O10 I/O7 11 14 I/O9 THIN QFN GND 12 13 I/O8 TSSOP/SSOP/SO Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas 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) .......975mW Maximum GND Current ...................................................-250mA 24-Pin Thin QFN (derate 20.8mW/C above +70C) .1668mW DC Input Current on I/O0I/O15.......................................20mA Operating Temperature Range .........................-40C to +125C DC Output Current on I/O0I/O15 ....................................80mA Junction Temperature......................................................+150C 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 5.5 V + V = 2V 23 35 All I/Os unloaded, + + Supply Current I V = 3.3V 43 60 A f = 400kHz SCL + V = 5.5V 80 120 + V = 2V 2.3 11 All I/Os unloaded, + Standby Current I V = 3.3V 2.9 12 A STBY f = 0 SCL + V = 5.5V 3.8 15.5 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 Input Leakage Current T = -40C to +85C -1 +1 A A + 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 MAX7312