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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 208kB) Download   E-Mail

Description

The MAX6970 serial-interfaced LED driver provides eight open-drain, constant-current-sinking LED driver outputs rated at 36V. The device operates from a 3V to 5.5V supply. The MAX6970 supply and the LEDs' supply can power up in any order. The constant-current outputs are programmed together up to 55mA using a single external resistor. The MAX6970 operates with a 25Mbps, industry-standard, 4-wire serial interface. The MAX6970 uses the industry-standard shift-register-plus-latch-type serial interface. The driver accepts data shifted into an 8-bit shift register using data input DIN and clock input CLK. Input data appears at output DOUT eight clock cycles later to allow cascading of multiple MAX6970s. The latch-enable input, LE, loads the 8 bits of shift register data into an 8-bit output latch to set which LEDs are on and which are off. The output-enable input, active-low OE , gates all eight outputs on and off, and is fast enough to be used as a PWM input for LED intensity control. For applications requiring LED fault detection, refer to the MAX6981 data sheet that automatically detects open-circuit LEDs. For safety-related applications requiring a watchdog timer, refer to the MAX6980 data sheet, which includes a fail-safe feature that blanks the display if the serial interface becomes inactive for more than 1s. The MAX6970 is one of a family of 10 shift-register-plus-latch-type LED drivers. The family includes 8-port and 16-port types, with 5.5V- or 36V-rated LED outputs, with and without open-circuit LED detection and watchdog. All versions operate from a 3V to 5.5V supply, and are specified over the -40°C to +125°C temperature range.

An evaluation kit is available:  MAX6970EVKIT  

Key Features		Applications/Uses
25Mbps Industry-Standard 4-Wire Serial Interface at 5V 3V to 5.5V Logic Supply Eight Constant-Current LED Outputs Rated at 36V Up to 55mA Continuous Current per Output Output Current Programmed by Single Resistor 3% Current Matching Between Outputs 6% Current Matching Between ICs -40°C to +125°C Temperature Range		Architectural Lighting Gaming Features Marquee Displays Point-of-Order Signs Traffic Signs Variable Message Signs

Diagram

Typical Operating Circuit

Application Notes

Application Note 4379: Display Different LED Sequences Using the MAXQ2000 Microcontroller with the MAX6970 LED Driver - MAX6970

Evaluation Kits

MAX6970EVKIT

Reliability Reports

Show FIT data for: MAX6970 Request Reliability Report for: MAX6970

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: 1-9 of 9

MAX6970	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6970APE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing: 21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6970AAE+			Active	SSOP;16 pin;50 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0106 (PDF) Use pkgcode/variation: A16+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6970AAE+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6970AAE			Active	SSOP;16 pin;50 mm² Outline Drawing: 21-0056 (PDF) Land Pattern: 90-0106 (PDF) Use pkgcode/variation: A16-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6970AAE-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX6970AUE+			Active	TSSOP-EP;16 pin;33.2 mm² Outline Drawing: 21-0108 (PDF) Land Pattern: 90-0120 (PDF) Use pkgcode/variation: U16E+3*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6970AUE+T			Active	TSSOP-EP;16 pin;33.2 mm² Outline Drawing: 21-0108 (PDF) Land Pattern: 90-0120 (PDF) Use pkgcode/variation: U16E+3*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6970AUE			Active	TSSOP-EP;16 pin;33.2 mm² Outline Drawing: 21-0108 (PDF) Land Pattern: 90-0120 (PDF) Use pkgcode/variation: U16E-3*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6970AUE-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet

More Information

New Product Press Release 2005-10-26 Product Ad: Download

Related Products

MAX6977 8-Port, 5.5V Constant-Current LED Driver with LED Fault Detection MAX6968 8-Port, 5.5V Constant-Current LED Driver MAX6971 16-Port, 36V Constant-Current LED Driver MAX6979 16-Port, 5.5V Constant-Current LED Driver with LED Fault Detection and Watchdog MAX6969 16-Port, 5.5V Constant-Current LED Driver MAX6978 8-Port, 5.5V Constant-Current LED Driver with LED Fault Detection and Watchdog

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