AS1115-BSST

AS1115-BSST is a 64 LEDs, I²C interfaced LED driver with keyscan. It is a compact LED driver for 64 single LEDs or 8 digits of 7-segments. Device can be programmed via an I²C compatible 2-wire interface. Every segment can be individually addressed and updated separately. Only one external resistor is required to set the current. LED brightness can be controlled by analogue or digital means. The device includes an integrated BCD code-B/HEX decoder, multiplex scan circuitry, segment and display drivers, and a 64bit memory. Internal memory stores the shift register settings, eliminating the need for continuous device reprogramming. It can be configured for key readback. Keyswitch status is obtained by polling for up to 64 keys while 16 keys can be used to trigger an interrupt. It is ideal for seven-segment or dot matrix user interface displays of set-top boxes, VCRs, DVD-players, washing machines, micro wave ovens, refrigerators and other white good or personal electronic applications.

• Individual LED segment control
• Open and shorted LED error detection, global or individual error detection
• Hexadecimal or BCD code for 7-segment displays
• Digital and analogue brightness control, display blanked on power-up
• Drive common-cathode LED displays, software reset
• Operating supply voltage range from 2.7 to 5.5V (TAMB = +25°C)
• Display scan rate range from 0.48 to 0.96KHz (8 digits scanned, TAMB = +25°C)
• Hysteresis voltage is 1V typical (DIN, CLK, LD/CS, TAMB = +25°C)
• Debounce time is 20ms typical (CB = 550pF (max), TAMB = +25°C)
• QSOP-24 package, operating temperature range from -40 to 85°C