SX8124ISTRT SEMTECH [Semtech Corporation], SX8124ISTRT Datasheet - Page 10

• Manufacturer Part Number: SX8124ISTRT
• Description: 24 hours timer synchronized on 50/60Hz mains
• Manufacturer: SEMTECH [Semtech Corporation]

ACS - Revision 2.4
© Semtech Corp.
6
6.1
6.2
ADVANCED COMMUNICATIONS & SENSING
24h Timer
Operating
The pin START is used to change the OUT (and NOUT) state. A short pulse (below 1 second) on this pin
manually changes the OUT and NOUT state
system and restarts the synchronization of the chip on its PHASE input.
Debounce on START pin
The START pin is active low. For a start/stop command detection, the voltage on the START pin must be
maintained low during 10ms. Then, a delay of 20ms is necessary before the next start/stop command.
This allow to remove wrong start/stop commands due to oscillations when using of low-cost push buttons.
START
NOUT
NOUT
OUT
OUT
start timer
start timer
Figure 6. Outputs toggling pushing START pin down during less than 1 second
October 2010
Figure 5. Outputs waveforms during the 24 h cycle
Short low pulse
pin toggle
toggle at set duration
24h cycle
24h cycle
Page 10
(Figure
24 hours timer synchronized on 50/60Hz mains
6). A long pulse (around 3 seconds or more) resets the
Short low pulse
pin toggle
(re)start
(re)start
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Next 24h cycle
Next 24h cycle
SX8124
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