LM8560 datasheet(5/9 Pages) UTC

5 / 9 page

UTCLM8560

MOS IC

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R502-005,D

When activated by drop in power supply, all segments which are lit begin to blink and the unit switches

to a power failure detection display. The power failure detection display is canceled by activating VSS to

Hours set or Min set.

*Alarm Operation and Alarm Output :

The alarm signal outputs when alarm content matches the content of current time. When not rest by

either snooze input or alarm off input, output continues after 1 hour and 59 minutes. This output signal

consists of 900Hz 2Hz intermittent (50% duty) modulation signals, When the need arises , a filter can be

applied to after the alarm signal to a DC signal.

*Snooze Input :

When the alarm is sounding and instantly activating VSS to this pin , alarm output is set to OFF for a

period between 8 and 9 minutes after which time the alarm signal is once again output. The snooze

function can be used repeatedly in 1 hours and 59 minutes intervals. A pull-down resistor is built-in

Activating VSS to the snooze pin when the alarm is OFF resets the sleep timer counter to [0:00 ](This is

known as the one-touch sleep timer reset function.)

*Alarm Off Input :

Activating this input pin to VSS instantly sets alarm output to OFF.A pull-down resistor is built-in.

*Sleep Timer and Sleep Output :

Sleep output can turn on the radio and can be set for time intervals of 59 minutes or 1 hour and 59

minute. Refer to Table 2 for the proper selection procedure (59 minutes or 1 hour and 59 minute

selection.) This sleep timer is constructed using a down counter and when the counter content arrives at

[00], output is set to off and the radio turns off. Adding VSS to snooze input turns sleep output off. When

sleep output is on.

LM8560 Datasheet(PDF) 5 Page - Unisonic Technologies