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AS1115-BQFT Datasheet(PDF) 3 Page - ams AG |
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AS1115-BQFT Datasheet(HTML) 3 Page - ams AG |
3 / 26 page www.austriamicrosystems.com/LED-Driver-ICs/AS1115 Revision 1.08 2 - 25 AS1115 Datasheet - P i n o u t 4 Pinout Pin Assignments Figure 2. Pin Assignments (Top View) Pin Descriptions Table 1. Pin Descriptions Pin Name QSOP-24 TQFN(4x4)-24 Description SDA 1 22 Serial-Data I/O. Open drain digital I/O I²C data pin. DIG0:DIG7 2-5, 7-10 1, 2, 4, 5, 6, 7, 23, 24 Digit Drive Lines. Eight digit drive lines that sink current from the display common cathode. Keyscan detection optional, but must be polled by the Prozessor. GND 6 3 Ground. KEYA 11 8 Keyscan Input. Keyscan lines for key readback. Can be used for self-addressing. KEYB 12 9 Keyscan Input. Keyscan lines for key readback. ISET 13 10 Set Segment Current. Connect to VDD or a reference voltage through RSET to set the peak segment current (see Selecting RSET Resistor Value and Using External Drivers on page 19 ). SCL 14 11 Serial-Clock Input. 3.4MHz maximum rate. IRQ 24 21 Interupt Request Output. Open drain pin. SEGA:SEGG, SEGDP 15-18, 20-23 12-15, 17-20 Seven Segment and Decimal Point Drive Lines. 8 seven-segment drives and decimal point drive that source current to the display. VDD 19 16 Positive Supply Voltage. Connect to +2.7 to +5.5V supply. - Exposed Pad Exposed Pad. This pin also functions as a heat sink. Solder it to a large pad or to the circuit-board ground plane to maximize power dissipation. AS1115 SEG E 8 18 SEGB 14 DIG2 1 GND 3 AS1115 DIG5 5 10 12 VDD 16 SEGC 17 SEGG 15 SEGF 13 DIG3 2 DIG4 4 DIG6 6 11 9 7 23 21 19 20 22 24 Exposed Pad |
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