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LM8562 Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part No. LM8562
Description  Digital Alarm Clock
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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5.
Alarm
The LM8562 contains two alarms on a 24-hour basis.
Alarm 1 ..... Superposition of 600 Hz and 1 Hz
Alarm 2 ..... Superposition of 1200 Hz and 1 Hz
6-minutes snooze
The alarm output duration time is 59 minutes. The 59-minute duration counter is common to the alarm 1, alarm2, and sleep
timer.
6.
Time Setting, Dimmer
The 3 level input RT-TIME SET/DIMMER INPUT pin provides the following functions.
RT-TIME SET/DIMMER INPUT Pin Input
Functions
VDD
Time setting enable, normal display
.
Time, alarm time, sleep timer duration time setting enable
OPEN
Time setting inhibit, normal display
.
Time setting enable (except power-down mode)
VSS
Time setting inhibit, dimmer display
.
Display brightness 50 Hz mode: 1/24 duty
60 Hz mode: 1/20 duty
The 3-level input TIME-SET INPUT pin provides the following operations.
TIME-SET INPUT Pin Input
Operations
VDD
AC (50/60 Hz or more)
Fast-up
DC (20 ms min.)
Slow-up
OPEN
No operation
VSS
AC (50/60 Hz or more)
Fast-down
DC (20 ms min.)
Slow-down
Setting Contents
1 Fast-up/down
50/60 Hz rate
2 Slow-up/down
Immediately incremented/decremented
±1 and counted up/down ata2Hz rate 0.5 to 1.0 second later
7.
ON/OFF INPUT Pin
The 3-level input ON/OFF INPUT pin acts on the ALM-1, 2 RADIO OUTPUT pins as shown below.
Output Pin
ON-State Condition
Pause
Conditions
OFF-State Conditions
ALM-1 OUTPUT
Alarm 1 setting time = Current time
Snooze-in
.
ON/OFF INPUT = VSS
.
ON/OFF INPUT = VDD
.
Sleep-in
.
59 minutes after the alarm 1 is turned ON
.
ALM-1 OUTPUT = VDD
ALM-2 OUTPUT
Alarm 2 setting time = Current time
Snooze-in
.
ON/OFF INPUT = VSS
.
ON/OFF INPUT = VDD
.
Sleep-in
.
59 minutes after the alarm 2 is turned ON
.
ALM-2 OUTPUT = VDD
RADIO OUTPUT
ON/OFF INPUT = VSS
(ON-state indicator : ON state)
.
ON/OFF INPUT = VDD
.
Power-down mode
.
Sleep-in
(On-state indicator : OFF state)
Sleep-in
(Sleep indicator : ON state)
.
ON/OFF INPUT = VSS
.
ON/OFF INPUT = VDD
.
Power-down mode
(Sleep indicator : OFF state)
8.
Sleep, Snooze Timer
The 3-level input SLEEP/SNOOZE INPUT pin operates as shown below.
SLEEP/SNOOZE INPUT Pin Input
Operation
VDD (20 ms min.)
Snooze-in & seconds display mode
.
The alarm stops functioning for 6 to 7 minutes.
.
Seconds display
OPEN
No operation
VSS (20 ms min.)
Sleep mode
.
The sleep counter is set to operate for 59 minutes.
.
Counted down automatically ata2Hz rate 1.5 to 2.0 seconds later
.
Fast/slow, up/down time setting available
LM8562
No.2658-5/7




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