SX8124 Datasheet, PDF (1/23 Pages) Semtech Corporation – 24 hours timer synchronized on 50/60Hz mains

SX8124
24 hours timer synchronized on 50/60Hz mains
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Description
The SX8124 is 24 hours timer with an analog
programmable duty cycle that synchonizes on
European standard (220V/50Hz) and US standard
(110V/60Hz) mains for high timing precision without
calibration or resonator.
The SX8124 starts counting time when connected to
the mains, its internal counter can be reset on the
press of a button (optional) or by setting the
duration to zero. The SX8124 duty cycle is set using
one single resistive divider. Its output can be forced
on or off with the press of the optional button.
SX8124 outputs are complementary to simplify the
connection of switches and an optional LED can
confirm the timer status.
Features
24 hours timer synchronized on mains frequency
Analog period setting
Automatic 50 Hz and 60 Hz detection
Simplest usage
Manual on/off/reset option
LED status option
Applications
Mosquito repellent
Odor killers
Illuminated decoration
Xmas animation
Ordering Information
Part number
Function
SX8124ISTRT
24 hours timer
- Available in tape and reel only
- WEEE/RoHS compliant. Pb-Free and Halogen Free.
Package
SOIC-8
Functional Bloc Diagram
1.2 – 2.0 V supply
Reg
SX8124
DURATION
ADC
PHASE
SYNC
Start Timer
ON/OFF outputs
START
LED
LED blink:
Once every 5 sec: off
Twice every 5 sec: on
2 Hz: ‘‘no synch’’ error
DEBOUNCE
BURST
VDD
OUT
VSS
NOUT
24 hours
duration
ACS - Revision 2.4
© Semtech Corp.
October 2010
Page 1
www.semtech.com/products/