The MAX7311 2-wire-interfaced expander provides 16-bit parallel input/output (I/O) port expansion for SMBus™ and I2C™ applications. The MAX7311 consists of input port registers, output port registers, polarity inversion registers, configuration registers, a bus timeout register, and an I2C-compatible serial interface logic compatible with SMBus. The system master can invert the MAX7311 input data by writing to the active-high polarity inversion register. 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 output. A power-on reset (POR) initializes the 16 I/Os as inputs. Three address select pins configure one of 64 slave ID addresses. The MAX7311 supports hot insertion. All port pins, the INT output, SDA, SCL and the slave address inputs AD0–2 remain high impedance in power down (V+ = 0V) with up to 6V asserted upon them. The MAX7311 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.
The MAX7311 is a 2‑wire‑interfaced I/O port expander that provides 16 parallel input/output pins for SMBus™ and I²C™ applications. It includes input, output, polarity‑inversion, configuration and bus‑timeout registers, and supports hot insertion.
The device is available in 24‑pin SO, SSOP, TSSOP and thin QFN packages and operates over a -40 °C to +125 °C temperature range, with a supply voltage of 2 V to 5.5 V and a maximum I²C clock frequency of 400 kHz.
| Supply Voltage (V+) | 2 V to 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C to +125 °C |
| Number of I/O Pins | 16 |
| Maximum I²C Clock Frequency | 400 kHz |
| Maximum V+ Current | +250 mA |
The MAX7311 operates with a supply voltage from 2 V up to 5.5 V.
The device provides 16 parallel I/O pins.
The maximum clock frequency is 400 kHz.
It is specified for operation from –40 °C to +125 °C.