MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection

Description

The MAX7318 2-wire-interfaced expander provides 16-bit parallel input/output (I/O) port expansion for SMBus™ and I²C applications. The MAX7318 consists of input port registers, output port registers, polarity inversion registers, configuration registers, and an I²C-compatible serial interface logic compatible with SMBus. The system master can invert the MAX7318 input data by writing to the active-high polarity inversion 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 MAX7318 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 MAX7318 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 an SMBus timeout function, refer to the MAX7311 data sheet.

An evaluation kit is available: MAX7318EVKIT

Key Features

Applications/Uses

400kbps I²C-Compatible Serial Interface
2V to 5.5V Operation
5.5V 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)
Noise Filter on SCL/SDA Inputs
64 Slave ID Addresses Available
Low Standby Current (5.4µA 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

I/O

Interr.Out

Over Voltage Protect.

Drive Current
(mA)

V_SUPPLY
(V)

Price

min

max

See Notes

MAX7318

64 Slave IDs

Transition Detection

Serial 2-Wire 400kbit

Yes

5.5V

5.5

$1.52 @1k

See All I/O Port Expanders (26)

Diagram

Block Diagram

Application Notes

Application Note 2199: Driving LEDs with Push-Pull Port Expander Outputs - MAX7318

Evaluation Kits

MAX7318EVKIT

Design Guides

Interface (PDF)

Reliability Reports

Show FIT data for:

Request Reliability Report for:

Software/Models

none

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: 1-16 of 16

MAX7318 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX7318AWG+

Active SOIC(W);24 pin;166 mm²
Outline Drawing: 21-0042 (PDF)
Land Pattern: 90-0182 (PDF)
Use pkgcode/variation: W24+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7318AWG+T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7318AWG

Active SOIC(W);24 pin;166 mm²
Outline Drawing: 21-0042 (PDF)
Land Pattern: 90-0182 (PDF)
Use pkgcode/variation: W24-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7318AWG-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7318AAG+

Active SSOP;24 pin;66 mm²
Outline Drawing: 21-0056 (PDF)
Land Pattern: 90-0110 (PDF)
Use pkgcode/variation: A24+2*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7318AAG+T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7318AAG

Active SSOP;24 pin;66 mm²
Outline Drawing: 21-0056 (PDF)
Land Pattern: 90-0110 (PDF)
Use pkgcode/variation: A24-2*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7318AAG-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7318ATG-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7318ATG

Active TQFN;24 pin;17 mm²
Outline Drawing: 21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444-4*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7318ATG+

Active TQFN;24 pin;17 mm²
Outline Drawing: 21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444+4*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7318ATG+T

Active TQFN;24 pin;17 mm²
Outline Drawing: 21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444+4*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7318AUG

Active TSSOP;24 pin;52 mm²
Outline Drawing: 21-0066 (PDF)
Land Pattern: 90-0118 (PDF)
Use pkgcode/variation: U24-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7318AUG-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7318AUG+

Active TSSOP;24 pin;52 mm²
Outline Drawing: 21-0066 (PDF)
Land Pattern: 90-0118 (PDF)
Use pkgcode/variation: U24+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7318AUG+T

Active TSSOP;24 pin;52 mm²
Outline Drawing: 21-0066 (PDF)
Land Pattern: 90-0118 (PDF)
Use pkgcode/variation: U24+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

Related Products

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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
MAX7311 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
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
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Document Ref.: 19-3381; Rev 3; 2008-03-04
This page last modified: 2009-10-07