MX171

MX171 AMPLITUDE TYPE AUTO FOCUS IC FEATURES Package : 8-pin SOP, 8-pin DIP Operating voltage : 2.2V~6V Operating temperature : -25oC~60oC Supply current : max. 10mA (without output current) Surround light level : max. 20uA (SPD output current) IRED drive output : min. 15mA Magnet drive current : min. 300mA Measuring time : max. 30ms DESCRIPTION MX171 is designed for Amplitude system auto focus cameras. It is regarded as input component for SPD (Silicon Photo Detector), and comprises of circuits that drive AF magnet as output, an infrared emission diode current control circuit, and control circuit of sequential timing. PIN CONFIGURATION 8 SOP GND CH SPD VCC 2 3 4 MX171 8 OUT 7 IRED 6 CT 5 VR PIN FUNCTIONS SYMBOL GND CH SPD VCC VR CT IRED OUT PIN NAME Ground Pin Hold Capacitor Pin SPD Input Pin Supply Pin VR Pin for Adjustment Timing Capacitor Output Control for IRED Data Output Pin P/N: PM0167 1 REV 1.2, JAN 05, 1996 BLOCK DIAGRAM MX171 V...