MSM5547

www.DataSheet4U.com FEDL5547-03 FEDL5547-03 This version: May. 2000 MSM5547 Previous version: Nov. 1999 ¡ Semiconductor ¡ Semiconductor MSM5547 Digital Clock GENERAL DESCRIPTION MSM5547 is a clock IC having a wide power supply range with 4.194304 MHz original oscillation. MSM5547 is a 12 hour cycle AM/PM clock for a static fluorescent character display tube. Time correction is in hour, minute and 30 minute adjustments. Hour and minute are corrected by a 2 Hz fast-forward function. MSM5547 also has a contrast adjustment function for the fluorescent character display tube, which can set four levels of contrast, including 100% duty. FEATURES 12 hour clock (AM/PM) Applied for static fluorescent character display tube Wide power supply range: 4 to 16V 4.194304 MHz original oscillation 4 levels of contrast can be selected Package options: 44-pin plastic QFP (QFP44-P-910-0.80-L2) (Product name: MSM5547GS-L2) BLOCK DIAGRAM CMOS OSC OUT OSC IN TEST 1 TEST 2 TEST 3 VSS Time adjustment Oscillation Frequency dividers 1 Hz 64 Hz 1 Hz a1 b1 VDD Test adjustment 1 / 60 Decoder segment VDD A/C SE ZA MS HS VSS DIM CONT 1 DIM CONT 2 DIM TEST 4 VSS VDD Contrast adjustment (1 / 60) Hour counter (1 / 12) AM PM Decoder segment Driver [PCH open drain] Minute counter g3 b4 c4 AM PM VDD 1/10 FEDL5547-03 ¡ Semiconductor MSM5547 PIN CONFIGURATION (TOP VIEW) 37 TEST 2 34 AM 41 TEST 1 38 TEST 3 40 TEST 4 36 MS 43 PM 39 NC 35 HS 42 ZA b4 33 f3 32 a3 31 b3 30 1 ...