DL927 Overview
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 uses such as parking alarm timer, pillbox timer, kitchen timer, etc.
DL927 Key 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