MAX7300 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander

Description

The MAX7300 compact, serial-interfaced, I/O expansion peripheral provides microprocessors with up to 28 ports. Each port is individually user configurable to either a logic input or logic output.

Each port can be configured as either a push-pull logic output capable of sinking 10mA and sourcing 4.5mA, or a Schmitt logic input with optional internal pullup. Seven ports feature configurable transition detection logic, which generates an interrupt upon change of port logic level. The MAX7300 is controlled through an I²C-compatible 2-wire serial interface, and uses four-level logic to allow 16 I²C addresses from only two select pins.

The MAX7300AAX and MAX7300ATL have 28 ports and are available in 36-pin SSOP and 40-pin thin QFN packages, respectively. The MAX7300AAI and MAX7300ATI have 20 ports and are available in 28-pin SSOP and thin QFN packages. For an SPI™-interfaced version, refer to the MAX7301 data sheet. For a pin-compatible port expander with additional 24mA constant-current LED drive capability, refer to the MAX6956 data sheet.

Key Features

Applications/Uses

400kbps I²C-Compatible Serial Interface
2.5V to 5.5V Operation
-40°C to +125°C Temperature Range
20 or 28 I/O Ports, Each Configurable as
- Push-Pull Logic Output
- Schmitt Logic Input
- Schmitt Logic Input with Internal Pullup
11µA (max) Shutdown Current
Logic Transition Detection for Seven I/O Ports

	Automotive
	Industrial Controllers
	System Monitoring
	White Goods

Key Specifications: I/O Port Expanders

Part Number

Features

Interface

I/O

Interr.Out

Drive Current
(mA)

V_SUPPLY
(V)

Price

min

max

See Notes

MAX7300

Direct LED Drive with Blinking

Transition Detection

Serial 2-Wire 400kbit

20 or 28

Yes

2.5

5.5

$2.55 @1k

See All I/O Port Expanders (26)

Diagram

Typical Operating Circuit

Application Notes

Application Note 2199: Driving LEDs with Push-Pull Port Expander Outputs - MAX7300
Application Note 2852: Using a PC to Experiment with the MAX7300/MAX7301 Port Expanders - MAX7300
Application Note 3658: Serializing an HD44780 LCD Display - MAX7300
Application Note 4021: MAX6956 Programming Guide - MAX7300

Design Guides

Interface (PDF)
System Timing & Control (PDF)

Reliability Reports

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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

MAX7300 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX7300ANI+

Active PDIP(N);28 pin;290 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: N28+2*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300ANI

Active PDIP(N);28 pin;290 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: N28-2*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7300AGL

Active QFN;40 pin;37 mm²
Outline Drawing: 21-0105 (PDF)
Land Pattern: 90-0281 (PDF)
Use pkgcode/variation: G4066-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7300AGL-T

Active QFN;40 pin;37 mm²
Outline Drawing: 21-0105 (PDF)
Land Pattern: 90-0281 (PDF)
Use pkgcode/variation: G4066-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7300AAI

Active SSOP;28 pin;82 mm²
Outline Drawing: 21-0056 (PDF)
Land Pattern: 90-0095 (PDF)
Use pkgcode/variation: A28-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7300AAI-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7300AAI+

Active SSOP;28 pin;82 mm²
Outline Drawing: 21-0056 (PDF)
Land Pattern: 90-0095 (PDF)
Use pkgcode/variation: A28+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300AAI+T

Active SSOP;28 pin;82 mm²
Outline Drawing: 21-0056 (PDF)
Land Pattern: 90-0095 (PDF)
Use pkgcode/variation: A28+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300AAX

Active SSOP;36 pin;163 mm²
Outline Drawing: 21-0040 (PDF)
Land Pattern: 90-0098 (PDF)
Use pkgcode/variation: A36-4*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7300AAX-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7300AAX+

Active SSOP;36 pin;163 mm²
Outline Drawing: 21-0040 (PDF)
Land Pattern: 90-0098 (PDF)
Use pkgcode/variation: A36+4*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300AAX+T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7300ATI

Active TQFN;28 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0026 (PDF)
Use pkgcode/variation: T2855-6*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis

MAX7300ATI-T

Active

Land Pattern: Not Available

-40°C to +125°C See data sheet

MAX7300ATL+

Active TQFN;40 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0055 (PDF)
Use pkgcode/variation: T4066+5*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300ATL+T

Active TQFN;40 pin;37 mm²
Outline Drawing: 21-0141 (PDF)
Land Pattern: 90-0055 (PDF)
Use pkgcode/variation: T4066+5*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis

More Information

New Product Press Release 2002-08-14

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
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
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
MAX1608, MAX1609 Octal, SMBus-to-Parallel I/O Expanders

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Document Ref.: 19-2413; Rev 6; 2006-08-09
This page last modified: 2008-03-13