MAX7324 I²C Port Expander with Eight Push-Pull Outputs and Eight Inputs

Description

The MAX7324 2-wire serial-interfaced peripheral features 16 I/O ports that are divided into eight push-pull outputs and eight inputs. Each input features selectable internal pullups, overvoltage protection to +6V, and transition detection with an interrupt output.

All input ports are continuously monitored for state changes (transition detection). The interrupt is latched, allowing detection of transient changes. Any combination of inputs can be selected using the interrupt mask to assert the active-low INT output. When the MAX7324 is subsequently accessed through the serial interface, any pending interrupt is cleared.

The push-pull outputs are rated to sink 20mA and are capable of driving LEDs. The active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7324.

The MAX7324 uses two address inputs with four-level logic to allow 16 I²C slave addresses. The slave address also enables or disables internal 40k Ohm

pullups in groups of four ports.

The MAX7324 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1 in the full data sheet).

The MAX7324 is available in 24-pin QSOP and TQFN packages, and is specified over the -40°C to +125°C automotive temperature range.

An evaluation kit is available: MAX7324EVCMAXQU, MAX7324EVKIT

Key Features

Applications/Uses

400kHz, +6V-Tolerant I²C Serial Interface
+1.71V to +5.5V Operating Voltage
Eight Push-Pull Outputs
Eight Input Ports with Maskable, Latching Transition Detection
Input Ports are Overvoltage Protected to +6V
Transient Changes are Latched, Allowing Detection Between Read Operations
Active-Low INT Output Alerts Change on Any Selection of Inputs
AD0 and AD2 Inputs Select from 16 Slave Addresses
Low 0.6µA Standby Current
-40°C to +125°C Temperature Range

	Automotive
	Cell Phones
	Notebooks
	SAN/NAS
	Satellite Radio
	Servers

Key Specifications: I/O Port Expanders

Part Number

Features

Interface

Inputs

Outputs

Reset Input

Interr.Out

Over Voltage Protect.

Drive Current
(mA)

V_SUPPLY
(V)

Price

min

max

See Notes

MAX7324

16 Slave IDs

Low Standby Current

Port pullups

Transition Detection

Serial - I²C Compatible

Serial 2-Wire 400kbit

Yes

1.71

5.5

$0.92 @1k

See All I/O Port Expanders (26)

Diagram

Typical Application Circuit

Evaluation Kits

MAX7324EVCMAXQU, MAX7324EVKIT

Design Guides

Displays (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: 1-8 of 8

MAX7324 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX7324AEG+T

Active QSOP;24 pin;54 mm²
Outline Drawing: 21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7324AEG+

Active QSOP;24 pin;54 mm²
Outline Drawing: 21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7324AEG

Active QSOP;24 pin;54 mm²
Outline Drawing: 21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7324AEG-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7324ATG+

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

MAX7324ATG+T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7324ATG

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

MAX7324ATG-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

Related Products

MAX7322 I²C Port Expander with 4 Push-Pull Outputs and 4 Inputs
MAX7327 I²C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os
MAX7319 I²C Port Expander with Eight Inputs and Maskable Transition Detection
MAX7326 I²C Port Expander with 12 Push-Pull Outputs and Four Inputs
MAX7320 I²C Port Expander with Eight Push-Pull Outputs
MAX7321 I²C Port Expander with 8 Open-Drain I/Os
MAX7324 I²C Port Expander with Eight Push-Pull Outputs and Eight Inputs
MAX7323 I²C Port Expander with 4 Push-Pull Outputs and 4 Open-Drain I/Os
MAX7328, MAX7329 I²C Port Expanders with Eight I/O Ports

More Like This: View Product Families for Similar Products

See All I/O Port Expanders (26 Products)

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers
Parametric Search
Applications Help

QuickView Technical Documents Ordering Info More Information

Description
Key Features
Applications/Uses
Key Specifications
Diagram

Data Sheet
Application Notes
Design Guides
Engineering Journals
Reliability Reports
Software/Models
Evaluation Kits

Price and Availability
Samples
Buy Online
Package Information
Lead-Free Information

Related Products
Notes and Comments
Evaluation Kits

Document Ref.: 19-3785; Rev 0; 2006-11-09
This page last modified: 2009-09-03