DL927 - JinFengDa

DL927 4-DIGIT COUNTDOWN/UP TIMER

DL927 is an UP/DOWN timer IC. It can directly drive a standard 4 digit 1/4 duty cycle LCD. Maximum countdown time is 59:59 or 99:59. Count up cycle time is 60 or 100 minutes by bonding option. Also bonding option is for alarm time 32 or 64 seconds, 2kHz, and up/down or just down function. Feasible input options and universal functions give this chip many us.

Features

 Special alarm trigger output for switch control or for driving another melody IC  Internal voltage doubler  32,768Hz quartz crystal time base  Single 1.5V battery operation  Direct drive buzzer  4 digit LCD display  Maximum count 59:59 min or 99:59 min (bonding option)  Just count-down timer repeat function by bonding option  Minutes and Seconds set independently  Timer reset when depressing MSET and SSET simultaneously  Alarm sound 2kHz, 32 or 64 seconds (bonding option) 3. Function Block Diagram ------------------------------------------------------------------------------------.