Princeton Technology Corp. Output Expander IC Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT6999 DESCRIPTION PT6999 is an output expander providing 12 bits of serial to parallel output. Pin Assignments and application circuit are optimized for easy PCB Layout and cost saving benefits. FEATURES • Low Power Consumption • N-Channel Open Drain Output: (Qx) • High Output Withstanding Voltage (12V): (Qx) • Serial Cascade •Operating Voltage Range: 3.0 to 5.5 V • Low Power Dissipation • High Driving Capability APPLICATIONS • Radio Cassette Players • Telephones • Compact Audio System • Car Stereo PT6999 v 1.1 Page 1 Updated July 2001 Princeton Technology Corp. Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Output Expander IC PT6999 PIN CONFIGURATION VSS NC DATA CLOCK LCK Q0 Q1 Q2 Q3 Q4 PT6999 v 1.1 1 2 3 4 5 6 7 8 9 10 Page 2 20 19 18 17 16 15 14 13 12 11 VDD OE SO Q11 Q10 Q9 Q8 Q7 Q6 Q5 Updated July 2001 Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. Output Expander IC PT6999 APPLICATION CIRCUIT VSS MCU VEXT 330 Ohms VEXT 330 Ohms VEXT 330 Ohms VEXT 330 Ohms VEXT 330 Ohms +5V +5V GND DATA CLOCK LCK Q0 Q1 Q2 Q3 Q4 GND VDD OE SO Q 1 Q10 Q9 Q8 Q7 Q6 Q 330 Ohms V EXT 330 Ohms V EXT 330 Ohms V EXT 330 Ohms V EXT 330 Ohms V EXT 330 Ohms V EXT 330 Ohms V EXT DATA CLOCK LCK Q12 Q13 Q14 Q15 Q16 VDD OE SO Q23 Q22 Q21 Q20 Q19 Q18 Q17 SERIAL OUT Note: VEXT = External Voltage PT6999 v 1.1 Page 3 Updated July 2001