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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 200kB) Download   E-Mail

Description

The MAX6956 compact, serial-interfaced LED display driver/I/O expander provide microprocessors with up to 28 ports. Each port is individually user configurable to either a logic input, logic output, or common-anode (CA) LED constant-current segment driver. Each port configured as an LED segment driver behaves as a digitally controlled constant-current sink, with 16 equal current steps from 1.5mA to 24mA. The LED drivers are suitable for both discrete LEDs and CA numeric and alphanumeric LED digits. Each port configured as a general-purpose I/O (GPIO) can be 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 MAX6956 is controlled through an I²C-compatible 2-wire serial interface, and uses four-level logic to allow 16 I²C addresses from only 2 select pins. The MAX6956AAX and MAX6956ATL have 28 ports and are available in 36-pin SSOP and 40-pin thin QFN packages, respectively. The MAX6956AAI and MAX6956ANI have 20 ports and are available in 28-pin SSOP and 28-pin DIP packages, respectively. For an SPI-interfaced version, refer to the MAX6957 data sheet. For a lower cost pin-compatible port expander without the constant-current LED drive capability, refer to the MAX7300 data sheet.

An evaluation kit is available:  MAX6956EVKIT  

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 Constant-Current LED Driver Push-Pull Logic Output Schmitt Logic Input Schmitt Logic Input with Internal Pullup 11µA (max) Shutdown Current 16-Step Individually Programmable Current Control for Each LED Logic Transition Detection for Seven I/O Ports Underwriters Laboratories (UL®) Recognized		Automotive Bar Graph Displays Industrial Controllers Panel Meters Set-Top Boxes System Monitoring White Goods

Diagram

Typical Operating Circuit

Application Notes

Application Note 828: LED Manufacturers' Web Sites - MAX6956 Application Note 1141: Adding Global Intensity Control to the MAX6956 and MAX6957 Static LED Drivers - MAX6956 Application Note 1142: Experimenting with the MAX6956 and MAX6957 SPI and I²C GPIO and LED Display Drivers from a PC - MAX6956 Application Note 1193: Electronic Displays Comparison - MAX6956 Application Note 1883: LEDs Are Still Popular (and Improving) after All These Years - MAX6956 Application Note 2197: Driving LEDs with Constant Current Port Expander Outputs - MAX6956 Application Note 4021: MAX6956 Programming Guide - MAX6956

Evaluation Kits

MAX6956EVKIT

Reliability Reports

Reliability Report: MAX6956.pdf Show FIT data for: MAX6956 Underwriters Laboratories (UL®) Recognized

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: 1-14 of 14

MAX6956	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6956ANI			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
MAX6956ANI+			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
MAX6956AAI			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
MAX6956AAI-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: No Materials Analysis
MAX6956AAI+			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
MAX6956AAI+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
MAX6956AAX			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
MAX6956AAX-T			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
MAX6956AAX+			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
MAX6956AAX+T			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
MAX6956ATL			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: No Materials Analysis
MAX6956ATL-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6956ATL+			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
MAX6956ATL+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 2002-08-13  Product Ad: Download

Related Products

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