? 5 functions: month, date, hour, minute, second. ? 30-second alarm sound. ? chime on every hour. ? user selectable 12-hour/24-hour format. ? 4 year calendar ? one-touch correction of time error within ±30 seconds ? alarm, chime enable/disable operation. ? 2-switch sequential operation. ? lcd test. features ? single-chip cmos construction ? drives 4-digit duplexed lcd with pm/am-time, alarm mark and chime mark ? colon display ? direct drive of piezoelectric transducer ? low power dissipation ? 32,768hz crystal frequency ? on-chip oscillator, capacitor and resistors ? on-chip voltage doubler ? single 1.5v battery operation