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

Inputs/Outputs

Interrupt Output

Drive Current (mA)

Supply Voltage (min) (V)

Supply Voltage (max) (V)

RoHS Available

Package

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

Price^**

MAX7300

•	Transition detection, Direct LED drive with blinking

Serial 2-Wire 400kbit

20 or 28

Yes

2.5

5.5

Yes

PDIP/28
QFN/40
SSOP/28
SSOP/36
THIN QFN/28
THIN QFN/40

$2.55 @ 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: 1-16 of 16

MAX7300

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Sample

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Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX7300ANI+

PDIP;28 pin;290 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: N28+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300ANI

PDIP;28 pin;290 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: N28-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300AGL

QFN;40 pin;37 mm²
Dwg: 21-0105G (PDF)
Use pkgcode/variation: G4066-1*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300AGL-T

QFN;40 pin;37 mm²
Dwg: 21-0105G (PDF)
Use pkgcode/variation: G4066-1*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300AAI+T

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28+1*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300AAI+

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28+1*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300AAI

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300AAI-T

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300AAX+T

-40°C to +125°C

See data sheet

MAX7300AAX+

SSOP;36 pin;163 mm²
Dwg: 21-0040E (PDF)
Use pkgcode/variation: A36+4*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300AAX-T

SSOP;36 pin;163 mm²
Dwg: 21-0040E (PDF)
Use pkgcode/variation: A36-4*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300AAX

SSOP;36 pin;163 mm²
Dwg: 21-0040E (PDF)
Use pkgcode/variation: A36-4*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300ATI-T

-40°C to +125°C

See data sheet

MAX7300ATI

THIN QFN;28 pin;26 mm²
Dwg: 21-0140L (PDF)
Use pkgcode/variation: T2855-6*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX7300ATL+T

THIN QFN;40 pin;37 mm²
Dwg: 21-0141I (PDF)
Use pkgcode/variation: T4066+5*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX7300ATL+

THIN QFN;40 pin;37 mm²
Dwg: 21-0141I (PDF)
Use pkgcode/variation: T4066+5*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

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