MAX6957
PRODUCTION4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander
- Part Models
- 7
- 1ku List Price
- Starting From $6.33
Part Details
- High-Speed 26MHz SPI-/QSPI-™/MICROWIRE®-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
The MAX6957 compact, serial-interfaced LED display driver general-purpose I/O (GPIO) peripheral provides 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 constantcurrent 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 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 MAX6957 is controlled through an SPI-compatible 4-wire serial interface.
The MAX6957AAX and MAX6957ATL have 28 ports and are available in 36-pin SSOP and 40-pin TQFN (6mm x 6mm) packages, respectively. The MAX6957AAI and MAX6957ANI have 20 ports and are available in 28-pin SSOP and 28-pin DIP packages, respectively.
For a 2-wire interfaced version, refer to the MAX6956 data sheet.
For a lower cost pin-compatible port expander without the constant-current LED drive capability, refer to the MAX7301 data sheet.
Applications
- Bar Graph Displays
- Industrial Controllers
- Panel Meters
- Set-Top Boxes
- System Monitoring
- White Goods
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 1
Design Note 1
Technical Articles 5
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX6957AAI+ | 28-SSOP-5.3_MM | ||
| MAX6957AAI+T | 28-SSOP-5.3_MM | ||
| MAX6957AAX+ | 36-SSOP_W-7.62_MM | ||
| MAX6957AAX+T | 36-SSOP_W-7.62_MM | ||
| MAX6957AAX/GG8 | Shrink Small-Outline Package | ||
| MAX6957ATL+ | 40-LFCSP-6X6X0.75 | ||
| MAX6957ATL+T | 40-LFCSP-6X6X0.75 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Mar 1, 2016 - 1618 ASSEMBLY |
||
| MAX6957AAX+ | PRODUCTION | |
| MAX6957AAX+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Direct from Battery LED/GPIO Drivers 2 | ||
| MAX7317 | PRODUCTION | 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection |
| MAX7318 | PRODUCTION | 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection |
| Display Driver Electronics 10 | ||
| MAX6950 | PRODUCTION | Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers |
| MAX6954 | PRODUCTION | 4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan |
| MAX6956 | PRODUCTION | 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander |
| MAX6951 | PRODUCTION | Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers |
| MAX6952 | PRODUCTION | 4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver |
| MAX6955 | PRODUCTION | 2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan |
| MAX6958 | PRODUCTION | 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan |
| MAX6959 | PRODUCTION | 2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan |
| MAX7219 | PRODUCTION | Serially Interfaced, 8-Digit, LED Display Drivers |
| MAX7221 | PRODUCTION | Serially Interfaced, 8-Digit, LED Display Drivers |
| Product 1 | ||
| MAX6953 | 2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 x 7 Matrix LED Display Driver | |
Latest Discussions
No discussions on MAX6957 yet. Have something to say?
Start a Discussion on EngineerZone®