austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com Datasheet AS1106, AS1107 8-Digit LED Display Drivers 1 General Description 2 Key Features 10MHz SPI-, QSPI-, Microwire-Compatible Serial I/O The AS1106 and the AS1107 are compact display drivers for 7- segment numeric displays of up to 8 digits. The devices can be Individual LED Segment Control programmed via SPI, QSPI, and Microwire as well as a conventional Segment Blinking Control (can be synchronized across multiple 4-wire serial interface. drivers) The devices include an integrated BCD code-B/HEX decoder, Hexadecimal- or BCD-Code/No-Decode Digit Selection multiplex scan circuitry, segment and display drivers, and a 64-bit 3A Low-Power Shutdown Current (typ data retained) memory. Internal memory stores the LED settings, eliminating the Extremely Low Operating Current 0.5mA in Open-Loop need for continuous device reprogramming. Digital and Analog Brightness Control Every segment can be individually addressed and updated Display Blanked on Power-Up separately. Only one external resistor (RSET) is required to set the Drive Common-Cathode LED Displays current through the LED display. LED brightness can be controlled Low-EMI Low Slew-Rate Limited Segment by analog or digital means. The devices can be programmed to use Drivers (AS1107) the internal code-B/HEX decoder to display numeric digits or to Supply Voltage Range: 2.7 to 5.5V directly address each segment. Software Reset The AS1106 and the AS1107 feature an extremely low shutdown Optional External Clock current of typically 3A, and an operational current of less than SOIC 24-pin Package 500A. The number of digits can be programmed, the devices can be reset by software, and an external clock is also supported. Additionally, segment blinking can be synchronized across multiple drivers. 3 Applications Several test modes are available for easy application debugging. The AS1106 and AS1107 are ideal for bar-graph displays, The devices are available in a SOIC 24-pin package. instrument-panel meters, LED matrix displays, dot matrix displays, set-top boxes, white goods, professional audio equipment, medical equipment, industrial controllers and panel meters. Figure 1. AS1106, AS1107 - Typical Application Diagram +5V VDD 9.53k 8 Digits ISET DIG0 to DIG7 DIN I/O AS1106/ 8 Segments LOAD/CSN I/O AS1107 CLK SEG A to G SCK SEP DP GND Micro- processor GND 8-Digit Microprocessor Display www.austriamicrosystems.com/LED-Driver-ICs/AS1106 07 Revision 2.29 1 - 20 ams AG Technical content still valid