Part # MAX6957 datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX6957 DS


Part Details:

19-2429; Rev 4; 2/07 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander MAX6957 General Description Features The MAX6957 compact, serial-interfaced LED display High-Speed 26MHz SPI-/QSPI-TM/MICROWIRETM- driver general-purpose I/O (GPIO) peripheral provides Compatible Serial Interface microprocessors with up to 28 ports. Each port is indi- 2.5V to 5.5V Operation vidually user configurable to either a logic input, logicoutput, or common-anode (CA) LED constant-current -40°C to +125°C Temperature Range segment driver. Each port configured as an LED seg- 20 or 28 I/O Ports, Each Configurable as ment driver behaves as a digitally controlled constant- Constant-Current LED Driver current sink, with 16 equal current steps from 1.5mA to Push-Pull Logic Output 24mA. The LED drivers are suitable for both discrete Schmitt Logic Input LEDs and CA numeric and alphanumeric LED digits. Schmitt Logic Input with Internal Pullup Each port configured as a GPIO can be either a push- 11µA (max) Shutdown Current pull logic output capable of sinking 10mA and sourcing4.5mA, or a Schmitt logic input with optional internal 16-Step Individually Programmable Current pullup. Seven ports feature configurable transition Control for Each LED detection logic, which generates an interrupt upon Logic Transition Detection for Seven I/O Ports change of port logic level. The MAX6957 is controlledthrough an SPITM-compatible 4-wire serial interface. Ordering Information The MAX6957AAX and MAX6957ATL have 28 ports andare available in 36-pin SSOP and 40-pin TQFN (6mm x PIN- PKG 6mm) packages, respectively. The MAX6957AAI and PART TEMP RANGE PACKAGE CODE MAX6957ANI have 20 ports and are available in 28-pinSSOP and 28-pin DIP packages, respectively. MAX6957ANI -40°C to +125°C 28 DIP N28-2 For a 2-wire interfaced version, refer to the MAX6956 MAX6957AAI -40°C to +125°C 28 SSOP A28-1 data sheet. MAX6957AAX -40°C to +125°C


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MAX6957.pdf Datasheet