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MAX7312 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX7312 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 17 page General Description The MAX7312 2-wire-interfaced expander provides 16-bit parallel input/output (I/O) port expansion in SMBus™ and I2C™ applications. The MAX7312 consists of input port registers, output port registers, polarity inversion regis- ters, configuration registers, a bus timeout register, and an I2C-compatible serial interface logic, compatible with SMBus. The system master can invert the MAX7312 input data by writing to the active-high polarity inversion regis- ter. The system master can enable or disable bus timeout by writing to the bus timeout register. Any of the 16 I/O ports can be configured as an input or an output. A power-on reset (POR) initializes the 16 I/Os as inputs. Three address select pins configure the part to one of 64 slave ID addresses. The MAX7312 supports hot insertion. All port pins, the INT output, SDA, SCL, and the slave address inputs AD0-2 remain high impedance in power-down (Vt = 0V) up to 6V. The MAX7312 is available in 24-pin SO, SSOP, TSSOP, and thin QFN packages and is specified over the -40°C to +125°C automotive temperature range. For applications requiring I/Os with integrated 100k Ω pullup resistors, refer to the MAX7311 data sheet. Applications Servers/Blades RAID Systems Medical Equipment Instrumentation and Test Measurement Networking Features o 400kbps I2C-Compatible Serial Interface o 2V to 5.5V Operation o 5V Overvoltage Tolerant I/Os o Supports Hot Insertion o 16 I/O Pins that Default to Inputs on Power-Up o Open-Drain Interrupt Output (INT) o Bus Timeout for Lock-Up-Free Operation o Noise Filter on SCL/SDA Inputs o 64 User-Selectable Slave ID Addresses o Low Standby Current (2.9µA typ) o Polarity Inversion o 4mm ✕ 4mm, 0.8mm Thin QFN Package o -40°C to +125°C Operation 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-3057; Rev 0; 10/03 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. SMBus is a trademark of Intel Corp. I2C Purchase of I2C components of Maxim Integrated Products, Inc., or one of its Sublicense Associate Companies conveys a license under the Philips I2C Patent Rights to use these compo- nents in an I2C system provided that the system conforms to the I2C Standard Specifications as defined by Philips. PART TEMP RANGE PIN-PACKAGE MAX7312AWG -40°C to +125°C 24 Wide SO MAX7312AAG -40°C to +125°C 24 SSOP MAX7312ATG -40°C to +125°C 24 Thin QFN (4mm x 4mm) MAX7312AUG -40°C to +125°C 24 TSSOP TOP VIEW 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 V+ SDA SCL AD0 I/O0 AD2 AD1 I/O15 I/O14 I/O13 I/O12 I/O4 I/O3 I/O2 I/O1 16 15 14 13 9 10 11 12 I/O11 I/O10 I/O9 I/O8 GND I/O7 I/O6 I/O5 TSSOP/SSOP/SO MAX7312 INT THIN QFN MAX7312 1 2 3 4 78 9 10 11 12 24 23 22 21 20 19 5 6 18 17 16 15 14 13 I/O0 I/O2 I/O1 I/O3 I/O5 I/O6 I/O7 GND I/O8 I/O9 I/O10 AD2 AD1 V+ SDA SCL I/O4 AD0 I/O14 I/O15 I/O13 I/O11 I/O12 INT Pin Configurations |
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