MAX7311 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection

Description

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 active-low 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.

For applications requiring I/Os without pullup resistors, refer to the MAX7312 data sheet.

Key Features

Applications/Uses

400kbps I²C-Compatible Serial Interface
2V to 5.5V Operation
5V Overvoltage Tolerant I/Os
Supports Hot Insertion
16 I/O Pins that Default to Inputs on Power-Up
100kΩ Pullup on Each I/O
Open-Drain Interrupt Output (active-low INT)
Bus Timeout for Lock-Up-Free Operation
Noise Filter on SCL/SDA Inputs
64 Slave ID Addresses Available
Low Standby Current (2.9µA typ)
Polarity Inversion
4mm x 4mm, 0.8mm Thin QFN Package
-40°C to +125°C Operation

	Industrial Control
	Instrumentation and Test Measurement
	Medical Equipment
	PLCs
	RAID Systems
	Servers

Key Specifications: I/O Port Expanders

Part Number

Features

Interface

Inputs/Outputs

Interrupt Output

Over-Voltage Protection

Drive Current (mA)

Supply Voltage (min) (V)

Supply Voltage (max) (V)

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX7311

•	64 Slave IDs

•	Port pullups

•	Transition detection

Serial 2-Wire 400kbit

Yes

5.5V

5.5

Yes

SOIC/24
SSOP/24
THIN QFN/24
TSSOP/24

$2.10 @ 1k

See All I/O Port Expanders (26)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-12 of 12

MAX7311

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX7311AWG+T

-40°C to +125°C

See data sheet

MAX7311AWG+

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24+1*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7311AAG

SSOP;24 pin;66 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A24-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7311AAG+T

-40°C to +125°C

See data sheet

MAX7311AAG+

SSOP;24 pin;66 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A24+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7311AAG-T

SSOP;24 pin;66 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A24-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7311ATG+T

THIN QFN;24 pin;17 mm²
Dwg: 21-0139H (PDF)
Use pkgcode/variation: T2444+4*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7311ATG+

THIN QFN;24 pin;17 mm²
Dwg: 21-0139H (PDF)
Use pkgcode/variation: T2444+4*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7311AUG-T

TSSOP;24 pin;52 mm²
Dwg: 21-0066I (PDF)
Use pkgcode/variation: U24-1*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7311AUG+T

TSSOP;24 pin;52 mm²
Dwg: 21-0066I (PDF)
Use pkgcode/variation: U24+1*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7311AUG

TSSOP;24 pin;52 mm²
Dwg: 21-0066I (PDF)
Use pkgcode/variation: U24-1*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7311AUG+

TSSOP;24 pin;52 mm²
Dwg: 21-0066I (PDF)
Use pkgcode/variation: U24+1*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

Related Products

MAX6957 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
MAX7301 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander
MAX7300 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
MAX6956 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander
MAX7310 2-Wire-Interfaced 8-Bit I/O Port Expander with Reset
MAX6965 9-Output LED Driver with Intensity Control and Hot-Insertion Protection
MAX7312 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
MAX7313 16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7315 8-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7316 10-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7314 18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX6964 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection
MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection