SX8124ISTRT SEMTECH [Semtech Corporation], SX8124ISTRT Datasheet - Page 15

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

ACS - Revision 2.4
© Semtech Corp.
10
10.1
10.2
ADVANCED COMMUNICATIONS & SENSING
LED output
The LED output is used to indicate the status of the internal system. The LED signal is made of bursts of 4 us
pulses with a period of 30 us and total duration of 250 ms. This makes possible to activate a LED even at very
low voltage.
Synchronized on phase, outputs ON
When synchronized, the LED indicates the OUT pin status. The first pulse occurs 5 seconds after a POR, timer
startup or timer reset,
Synchronized on phase, outputs OFF
The first pulse occurs 5 seconds after a POR, timer startup or timer reset,
outside 50-60 Hz, at start-up or after a manual reset), the LED continuously sends bursts separated by 250
ms.
NOUT
NOUT
To indicate that OUT is high, the LED sends two bursts separated by 500 ms every 5 seconds.
To indicate that OUT is low, the LED send one burst every 5 seconds.
To indicate that the system is not synchronized (no PHASE detected, or frequency measured on PHASE
OUT
OUT
LED
LED
October 2010
250ms
250ms
500ms
250ms
Figure 16. Single pulse
Figure 15. Dual pulse
Page 15
24 hours timer synchronized on 50/60Hz mains
5s
5s
250ms
250ms
www.semtech.com/products/
500ms
5s
250ms
SX8124
DATASHEET