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Maxim > Products > Display Drivers and Display Power  Interface and Interconnect 
MAX6966, MAX6967
10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control


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Data Sheet
FULL DATA SHEET (PDF, 348kB)
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Description
The MAX6966/MAX6967 serial-interfaced peripherals provide microprocessors with 10 I/O ports rated to 7V.

Each port can be individually configured as either:
  • A 20mA constant-current LED driver (static or pulsewidth modulated (PWM)).
  • A 10mA constant-current LED driver (static or PWM).
  • An open-drain logic output.
  • An overvoltage-protected Schmitt logic input.
Analog and switching LED intensity control is built in:
  • Individual 8-bit PWM control per output.
  • Individual 1-bit analog control (half/full) per output.
  • Global 3-bit analog control applies to all LED outputs.
PWM timing of the 10 port outputs may be optionally staggered, consecutively phased in 45° increments. This spreads the PWM load currents over time in eight steps, helping to even out the power-supply current and reduce the RMS current.

The MAX6966/MAX6967 can be configured to awake from shutdown on receipt of a minimum 3ms pulse on the active-low CS input. This hardware-wakeup feature allows a power-management controller or similar ASIC to enable the MAX6966/MAX6967 with preconfigured LED intensity settings.

Shutdown can be programmed to wait up to 4s, fade down the sink currents to zero for a period of 1/16s to 4s, and then shut down. A similar ramp-up from shutdown can be programmed for 1/16s to 4s.

The MAX6966/MAX6967 support hot insertion. All port pins remain high impedance in power-down (V+ = 0V) with up to 8V asserted on them.

The DOUT/OSC pin can be configured as either the serial interface data output or optional PWM clock input. The MAX6966 powers up defaulting as DOUT output. The MAX6967 defaults as OSC input.

For a similar part without the constant-current controls, refer to the MAX7317 data sheet.

Key Features   Applications/Uses
  • High-Speed 26MHz SPI™-/QSPI™-/MICROWIRE™-Compatible Serial Interface
  • 2.25V to 3.6V Operation
  • I/O Ports Default to High-Z (LEDs Off) on Power-Up
  • I/O Port Inputs Are Overvoltage Protected to 7V
  • I/O Port Outputs Are 7V-Rated Open Drain
  • I/O Port Outputs Are 10mA or 20mA Constant-Current Static/PWM LED Drivers, or Open-Drain Logic Outputs
  • I/O Ports Support Hot Insertion
  • Individual 8-Bit PWM Intensity Control for Each LED
  • Any Output May Use or Not Use PWM Control
  • Exit Shutdown (Warm Start) with Simple Active-Low CS Pulse
  • Auto Ramp-Down into Shutdown
  • Auto Ramp-Up Out from Shutdown
  • 0.8µA (typ), 2µA (max) Shutdown Current
  • Tiny 3mm x 3mm, 0.8mm High Thin QFN Package
  • -40°C to +125°C Temperature Range

 
  		• Cell Phones
  		• Keypad Backlights
  		• LCD Backlights
  		• LED Status Indication
  		• Portable Equipment
  		• RGB LED Drivers

    Key Specifications:   Display Drivers
    Part Number Features LCD or LED Digits or Char. Output per Digit/Char. Display Type Interface Segment Blinking Slew-Rate Limiting Supply Voltage (min) (V) Supply Voltage (max) (V) RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX6966 
    •10mA/20mA Constant Current
    		 LED 10-Segment Any digit type Common Anode Serial SPI 26Mbit No Yes 2.25 3.6 Yes QSOP/16
    THIN QFN/16     		10 -40 to +125 $1.59 @ 1k
    MAX6967  $1.59 @ 1k
    See All Display Drivers (53)
    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.

    Application Notes
  		• Application Note 828: LED Manufacturers' Web Sites - MAX6966
  		• Application Note 1193: Electronic Displays Comparison - MAX6966
  		• Application Note 1879: Using Maxim SPI-compatible Display Drivers with other SPI Peripherals - MAX6966
  		• Application Note 1883: LEDs Are Still Popular (and Improving) after All These Years - MAX6966
  		• Application Note 2197: Driving LEDs with Constant Current Port Expander Outputs - MAX6966
  		• Application Note 3814: Port Expanders for Flip-Cell Phones Save Cost and Space - MAX6966

    Evaluation Kits
  		• MAX6966EVCMAXQU, MAX6966EVKIT

    Design Guides
  		• DISPLAYS (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * 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

    MAX6966 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6966AEE+  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6966AEE  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6966AEE-T  



    		-40°C to +125°C See data sheet
    MAX6966AEE+T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6966ATE+  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6966ATE+T  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6966ATE  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6966ATE-T  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6967 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6967AEE-T  



    		-40°C to +125°C See data sheet
    MAX6967AEE  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6967AEE+  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6967AEE+T  
    		QSOP;16 pin;31 mm²
    Dwg: 21-0055G (PDF)
    Use pkgcode/variation: E16+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6967ATE+T  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6967ATE  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633-4*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6967ATE+  
    		THIN QFN;16 pin;10 mm²
    Dwg: 21-0136I (PDF)
    Use pkgcode/variation: T1633+4*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6967ATE-T  



    		-40°C to +125°C See data sheet

    More Information
  		• Topmark Coding: MAX6966 MAX6967
  		• Product Ad: Download

    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
    MAX7300 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 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
    MAX6965 9-Output LED Driver with Intensity Control and Hot-Insertion Protection
    MAX6964 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection

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    Document Ref.: 19-3487; Rev 2; 2005-04-26
    This page last modified: 2007-05-02




             


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