ML9298

www.DataSheet4U.com OKI Semiconductor ML9298 12-Hour System Clock IC for 1/2 Duty Fluorescent Display Tubes FEDL9298-01 Issue Date: Jul. 11, 2005 GENERAL DESCRIPTION The ML9298 is a 12-hour system clock IC that drives 1/2 duty fluorescent display tubes. It has a wide range of power supply using an oscillation source of 4.194304 MHz. The ML9298 has a time adjustment function in hour, minute and 30-minute units, and the function has two adjustment modes, 1 Push 1 ADJ and 2Hz fast forward. Additionally, it has a brightness adjustment function for the fluorescent display tube, providing four levels of brightness settings. FEATURES 12-hour system Wide power supply range from 4 to 18V (built-in voltage regulator circuit) Designed for 1/2 duty fluorescent display tubes 4.194304MHz (crystal oscillation) Four levels of brightness settings Package: 32-pin plastic SSOP (SSOP32-P-430-1.00-K) (ML9298MB) 1/12 FEDL9298-01 OKI Semiconductor ML9298 BLOCK DIAGRAM Logic circuits VDDIN Power-on reset circuit RESET XT Grid driver XT DIM1 DIM2 Frequency divide circuit Grid decoder GR1 GR2 F64HZ 2a, 2d Time adjustment Second counter 4b, 4c, 2b Minute counter Segment decoder Segment driver Hour counter 2f 2c, col 2e 2g 3d, 1d 3e, 1e 3c, 1c 3g, 1g RESET COLSEL 3f, 1f 3b, 1b 3a, 1a TEST VDDOUT 3V regulator VCC High voltage circuit MS HS ZA BLANK A/C 2/12 FEDL9298-01 OKI Semiconductor ML9298 PIN CONFIGURATION (TOP VIEW) VCC VDDOUT VDDIN TEST DIM1 DIM2 BLANK HS MS ZA A/C XT...