Sanyo LC5645N Specifications
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
CMOS IC
LCD Digital Watch
Ordering number:ENN1433A
LC5645N
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, T aito-ku, TOKYO, 110-8534 JAPAN
Functions
• Real time (month, date, hours, minutes, seconds).
• 2 switches of SET switch, SELECT switch.
• LCD light-up system by duplex drive.
• Selectable real time display mode.
• Hours, minutes display mode.
• Month, date display mode.
• Seconds display mode.
• Alternating display mode available.
• 12/24-hour operation mode selectable by chip bonding.
• Automatic calendar (Programmed to count date in February up to the 28th).
• Reference frequency f
• Battery voltage 1.5V, with built-in doubler circuit.
=32.768kHz.
OSC
Display System
1. 3-1/2 digits LCD
2. 32Hz duplex drive
3. Display font
4. Panel layout
Hours Minutes Hours, minutes display mode
Month Date Month, date display mode
Seconds Seconds display mode
Month Month display mode
Date Date display mode
Hours Hours display mode
Minutes Minutes display mode
5. Output pins for display ...........14 pads
Segment output 1st digit : 3 segments, 3rd digit : 6
segments, other 2 digits :
7 segments
Colon ......... 1 segment
Common .... 2 pins of COMMON1, COMMON2
6. Total number of pads ........ 32 pads
51501TN (KT)/4204KI, TS No.1433–1/10
Operation Flow
LC5645N
1. Colon Flashing at 1Hz 50% duty
Lighted
2. AR.............................Returns automatically 1 to 2 seconds after re-
leasing the switch.
3. 12H/24H select.........Bonding option
4. S1* ............................ Execution of setting
One advance per push
Holding pushed for 1 second or more causes
fast advance at a 4Hz rate.
5. S1** .......................... Execution of setting
One advance per push
Holding pushed for 1 second or more causes
fast advance at a 4Hz rate.
Clears seconds and stops timekeeping.
6. AL TERN ATING MODE
Alternates the hours, minutes display mode/
month, date display mode at 2-second intervals.
7. A/P ............................Indicates AM/PM in 12-hour operation mode.
(Example)
8. HOLD STATE
Holds the counter and stops timekeeping.
Pushing switch S1 or S2 starts timekeeping.
9. Pushing switches S1 and S2 simultaneously causes the initial mode
to occur and the hours, minutes display mode is entered as follows :
(12H display mode) AM 1 : 00 : 00 Jan. 1
(24H display mode) 1 : 00 : 00 Jan. 1
No.1433–2/10
Block Diagram
Operating Specification
LC5645N
1.Hours, minutes display mode
• In this hours, minutes display mode the colon flashes at a 1Hz rate and 50% duty.
• The 10’s digit of hours is zero-blanked.
• In the 12-hour operation mode the hours digits change as 1 → 2 →............→ 12 → 1.
• In the 24-hour operation mode the hours digits change as 0 → 1 →....................... → 23 → 0.
2.Month, date display mode
• In the month, date display mode the colon is unlighted.
• The 10’s digit of both month and date is zero-blanked.
• Discrimination between long month and short month is exercised when an hour carry occurs and February date is
counted up to 28th.
3.Seconds display mode
• In the seconds display mode the colon flashes.
• Seconds are displayed on the right 2 digits, with the left 2 digits blanked.
4. Alternating display mode
• By pushing switch S2 in the hours, minutes display mode or month, date display mode, the alternating display
mode is entered. By pushing switch S2 and then switch S1 in the seconds display mode, the alternating display
mode is also entered.
• When the alternating display mode is entered, the month, date display appears. The hour, minutes display
appears 2 seconds later, and then the month, date display returns 2 seconds later. This is repeated.
No.1433–3/10
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