Sanyo LC85632 Specifications

Ordering number : EN4659

CMOS IC

LC85632

Digital Alarm Clock

Overview

The LC85632 is a multi-function digital clock IC that in addition to providing current time display supports a wide range of functions, including an alarm function, a sleep function, a calendar function, and a function to turn connected equipment on and off. Furthermore, the LC85632 provides a simpler user interface than that of earlier Sanyo products.

Applications

•Alarm clocks

•Clock radios

Functions

•Current time display

•Two independent alarm functions with snooze function

•Sleep timer function (up to 90 minutes)

•Calendar function

One year calendar (January 1 to December 31) that can display leap year’s day (February 29)

Package Dimensions

unit: mm

3196-DIP30SD

[LC85632]

SANYO: DIP30SD

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.

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

O3098HA (OT)/71093JN B8-0531 No. 4659-1/34

LC85632

Pin Assignment

No. 4659-2/34

LC85632

Pin Functions

No.

Pin

I/O

Internal

equivalent

Pin function

Handling when unused

circuit

1

AM & PM

O

LED output pins

Open

2

10’SHRag & d

O

No.

Pin

Drive phase 1

Drive phase 2

3

10’SHRb & e

O

VDD

1

AM & PM

AM

PM

2

10’SHR ag & d

10’SHR ad

10’SHR g

4

10’SHRc & HRe

O

3

10’SHRb & e

10’SHR e

10’SHR b

5

HRb & g

O

4

10’SHRc & HRe

HR e

10’SHR c

6

HRc & d

O

5

HRb & g

HR g

HR b

7

HRa & f

O

6

HRc & d

HR d

HR c

8

10’SMIN a & f

O

7

HRa & f

HR f

HR a

8

10’SMIN a & f

10’SMIN a

10’SMIN f

9

10’SMIN b & g

O

9

10’SMIN b & g

10’SMIN b

10’SMIN g

10

10’SMIN c & d

O

10

10’SMIN c & d

10’SMIN c

10’SMIN d

11

10’SMINe & MINe

O

11

10’SMINe & MINe

MIN e

10’SMIN e

12

MIN b & g

O

12

MIN b & g

MIN g

MIN b

13

MIN c & d

MIN d

MIN c

13

MIN c & d

O

14

MIN a & f

MIN f

MIN a

14

MIN a & f

O

15

COLON

COLON

—

15

COLON

O

16

ALM INDICATOR

ALM-A

ALM-B

16

ALM INDICATOR

O

(VDD – 15 V breakdown voltage)

22

RADIO OUTPUT

O

Outputs a DC voltage. This pin is controlled by the inputs to Open

the MANUAL & SLEEP pin (pin 26). It operates as a toggle.

VDD

During normal operation it outputs a low level (high

impedance).

MANUAL & SLEEP pin input level

VDD

OPEN

VSS

RADIO OUT

pin output level

(when pulled down to VSS)

VDD

VSS

(Normal breakdown voltage)

23

ALM-A OUTPUT

O

Output alarm signals

Open

24

ALM-B OUTPUT

O

ALM-A OUTPUT: Alarm A

VDD

ALM-B OUTPUT: Alarm B

The output waveform is shown below.

During normal operation these pins output a low level (high impedance).

ALM-A OUTPUT and ALM-B OUTPUT pin output levels (summary diagram)

* ALM-A OUTPUT (2400 Hz)

VDD

VSS

* ALM-B OUTPUT (1200 Hz)

VDD

VSS

Output start

(Normal breakdown voltage)

Continued on next page.

No. 4659-3/34

LC85632

Continued from preceding page.

No.	Pin	I/O	Internal		equivalent			Pin function	Handling when unused
			circuit
20	TIME SET INPUT	3I						Input pin that starts the setting/update of the current time,	Open
				VDD				the alarm time, or the calendar date. Normally left open
								(NOP).
						H		The application of a high level is taken as a + input,
								which increases the value of the setting, and a low is taken
						L		as a – input, which decreases the value of the setting.

H:High threshold input

L: Low threshold input

21

CAL DISP &

3I

Input pin for calendar display and snooze.

Open

SNOOZE

Normally left open. When a high level is applied the

VDD

calendar displays the day and month, and when a low level

is applied the calendar displays the month and day.

H

However, if an alarm signal is being output from either

ALM-A OUTPUT or ALM-B OUTPUT (pin 23 or 24) the

L

calendar is not displayed, but rather a snooze operation is

started.

H: High threshold

input

25

ALM-A/B DISP & SEL

3I

L: Low threshold

Input pin for switching between alarm mode and current

Open

input

time mode. Normally left open. When a high level is applied,

the current time setting for alarm A is displayed, and when

a low level is applied, the current time setting for alarm B is

displayed. In either case, the time setting and the operation

enable/disable state can be changed.

26

MANUAL & SLEEP

3I

Input pin for setting the RADIO OUTPUT pin (pin 22) output

Open

control and the sleep function time. Normally left open.

When a high level is applied the RADIO OUTPUT goes

high. This pin can also be used for setting the sleep

function time. When a low level is applied the RADIO

OUTPUT goes low. When either a low level or a high level

is applied, any alarm output in progress will be stopped.

Continued on next page.

No. 4659-4/34

LC85632

Continued from preceding page.

No.

Pin

I/O

Internal equivalent

circuit

28

MODE SELECT

3I

VDD

H

L

29

RT-TIME

3I

SET/DIMMER

H: High threshold

input

L: Low threshold

input

19 CR OSC

I/O

VDD

External RC constant circuit

	Pin function	Handling when unused
Input pin for switching the operating mode.		Either left open, connected
Switches the display mode and the clock input to the		to VDD, or connected to
50/60 Hz INPUT pin (pin 27).		ground.
High:	50 Hz/24 hour display
Open:	60 Hz/12 hour display
Low:	50 Hz/12 hour display
Input pin for switching the enabled/disabled state for setting		Open
the time.
Normally left open.
High:	Current time display/current time setting mode
Open:	Current time display/current time setting disabled
Low:	Dimmed display/current time setting disabled
Connection pin for external RC circuit.		Connected to VDD
An oscillator circuit with a frequency of 4800 Hz can be
formed using the following R and C values.
R = 68 kΩ
C = 4700 pF

17	VSS	I		—	Power supply pins.	—
30	VDD	I			VSS = 0 V
					VDD = +5 V (standard)
18	TEST	3I			LSI test pin.	Open
				VDD	Normally left open.
					H

L

H:High threshold input

L: Low threshold input

27

50/60 Hz INPUT

I

Input pin for the 50/60 Hz input for the clock.

(Schmitt input)

Note: • “3I” is an abbreviation for “three value input pin.” The inputs to these pins can be either high, open, or low. These pins areleft open during normal use.

• NOP: “No operation”

No. 4659-5/34

LC85632

Three Value Input Circuits: H: High level, M: Open, L: Low level, NOP: No operation

• MODE SELECT

Input level	Mode
H	50 Hz/24 hour display
M	60 Hz/12 hour display
L	50 Hz/12 hour display

• TIME SET INPUT

Input level	Mode
H	Up
M	NOP
L	Down

• RE-TIME SET/DIMMER

Input level	Mode
H	Current time display/current time setting mode
M	Current time display/NOP
L	Dimmed display/NOP

• CAL DISP & SNOOZE

Input level	Mode
H	Calendar display (day·month)/calendar setting/snooze on
M	Current time display/NOP
L	Calendar display (month·day)/calendar setting/snooze on

• ALM-A/B DISP & SEL

Input level	Mode
H	Alarm A setting display/setting
M	Current time display/NOP
L	Alarm B setting display/setting

• MANUAL & SLEEP

Input level	Mode
H	ON input/sleep-in
M	Current time display/NOP
L	OFF input

• TEST

Input level	Mode
H	Illegal setting
M	Normal operation
L	LED test

No. 4659-6/34

LC85632

Specifications

Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V

Parameter	Symbol	Applicable pin	Conditions	Ratings	Unit
Maximum power supply voltage	VDDmax			–0.3 to +7.0	V
Input voltage	VIN(1)	All input pins other than the		–0.3 to VDD + 0.3	V
		50/60 Hz INPUT pin
	VIN(2)	50/60 Hz INPUT	Pin voltage	–0.3 to VDD + 0.3
			With a 100 kΩ currentlimiting	VDD – 12 to VDD + 12
			resistor inserted in the input, at
			that resistor’s terminal.
Input clamping current	IIN	50/60 Hz INPUT	With a 100 kΩ limiting resistor	–0.4 to +0.4	mA
			inserted in the input.
Output voltage	VOUT(1)	CR OSC		–0.3 to VDD + 0.3	V
Output voltage	VOUT(2)	RADIO OUTPUT		–0.3 to VDD + 0.3	V
		ALM-A OUTPUT
		ALM-B OUTPUT
Output voltage	VOUT(3)	LED SEGMENT output pins		VDD – 15 to VDD + 0.3	V
		(pins 1 to 16)
Total output current	∑ ILED	Total for the LED	The average value of the	–280 to 0	mA
		SEGMENT output pins	effective current value within
		(pins 1 to 16)	a single display cycle
			according to the 50 or 60 Hz
			frequency.
Maximum power dissipation	Pdmax		Ta = –30 to +70°C	700	mW
Ambient temperature: operating	Topr			–30 to +70	°C
Ambient temperature: storage	Tstg			–55 to +125	°C

Allowable Operating Ranges at Ta = –30 to +70°C, VSS = 0 V

	Parameter	Symbol	Applicable pin	Conditions		Ratings		Unit
					min	typ	max
	Operating power supply voltage	VDD			4.0	5.0	6.0	V
	Input high level voltage	VIH(1)	CR OSC		0.75 VDD		VDD	V
	Input low level voltage	VIL(1)			VSS		0.25 VDD	V
	Input high level voltage	VIH(2)	TIME SET INPUT	The intermediate is the	VDD – 0.5		VDD	V
			CAL DISP & SNOOZE	open pin state.
			ALM-A/B DISP & SEL	The rated values apply
	Input intermediate level voltage	VIM(2)			1/2 VDD – 0.5		1/2 VDD + 0.5	V
			MANUAL & SLEEP	when an external signal
			MODE SELECT	is applied.
	Input low level voltage	VIL(2)	RT-TIME SET/DIMMER		VSS		VSS + 0.5	V
			TEST
	Input high level voltage	VIH(3)	50/60 Hz INPUT		VDD – 0.5		VDD + 0.3	V
	Input low level voltage	VIL(3)			VSS		VDD – 3.0	V
	Operating frequency	fOP	50/60 Hz INPUT		1		2000	Hz
	Input level hold time	tH	All three value input pins		10			ms
	Input chattering time	tC	All three value input pins		10			ms

No. 4659-7/34

LC85632

Electrical Characteristics at Ta = 25°C, VDD = 5 V, VSS = 0 V

	Parameter	Symbol	Applicable pin	Conditions		Ratings		Unit
					min	typ	max
	Output high level current	IOH(1)	10’ SHRag & d	Output on,	(Note 1)		–32	mA
				VOUT = VDD – 2.0 V
	Output off leakage current	IOF(1)		Output off,	–20			µA
				VOUT = VDD – 12 V
	Output high level current	IOH(2)	AM & PM	Output on,	(Note 2)		–16	mA
			10’SHRb & e	VOUT = VDD – 2.0 V
			10’SHRc & HRe
			HRb & g
			HRc & d
			HRa & f
			10’SMIN a & f
			10’SMIN b & g
			10’SMIN c & d
			10’SMINe & MINe
			MIN b & g
			MIN c & d
			MIN a & f
	Output off leakage current	IOF(2)	COLON	Output off,	–20			µA
			ALM INDICATOR	VOUT = VDD – 12 V
	Output high level current	IOH(3)	RADIO OUTPUT	Output on,			–2	mA
			ALM-A OUTPUT	VOUT = VDD – 2.0 V
	Output off leakage current	IOF(3)	ALM-B OUTPUT	Output off,	–10			µA
				VOUT = VSS
	Input high level current	IIH(2)	CR OSC	VIN = VDD			10	µA
	Input low level current	IIL(2)		VIN = VSS		–2		mA
	Input high level current	IIH(3)	TIME SET INPUT	VIN = VDD	10		100	µA
			CAL DISP & SNOOZE
			ALM-A/B DISP & SEL
			MANUAL & SLEEP
	Input low level current	IIL(3)		VIN = VSS	–100		–10	µA
			MODE SELECT
			RT-TIME SET/DIMMER
			TEST
	Pull-up resistance	RPU	TIME SET INPUT	VIN = 1/2 VDD		1.0		MΩ
			CAL DISP & SNOOZE
			ALM-A/B DISP & SEL
			MANUAL & SLEEP
	Pull-down resistance	RPD				0.8		MΩ
			MODE SELECT
			RT-TIME SET/DIMMER
			TEST
	Oscillator stability	fS	CR OSC (Note 2)	VDD = 5.0 V	–10		+10	%
	Oscillator precision	fA	CR OSC (Note 2)	VDD = 5.0 V	–10		+10	%
	Oscillator frequency	fOSC	CR OSC	R = 91 kΩ ±1%		4800		Hz
				C = 3300 pF ±5%
	Initial reset power supply voltage	VDET	VDD	Power supply voltage		2.5	4.0	V
			VSS	range when initial reset
				operates.
	Current dissipation (operating)	IDD		With no output load			2	mA

Note: 1. In addition to not exceeding the total output current ΣILED (from the absolute maximum ratings table), the segment output currents are allowed the following values within a 700 mW total power dissipation range.

10’SHRag & d: Up to –78 mA Others: Up to –39 mA

Current flowing out of the IC is expressed with negative values, and current flowing into the IC is expressed with positive values.

2.The total variation in the oscillator frequency will be the sum of the precision and the stability. That is, the limiting values for the oscillator frequency variation fall within the range from fosc - 19% to fosc + 21%.

No. 4659-8/34

LC85632

Functional Description

Segment Output

This IC can directly drive with its 16 segment pins duplex type LED panels that include colon and alarm indicators. However, since the total value of the LED drive current (∑ ILED) flowing into the LED panel is limited to its absolute maximum value, caution is required in design.

Figure 1 shows the correspondence between the LC85632 segment outputs and the LED panel. For example, pin 2 (the 10’SHRag & d pin) drives the segments ‘a’, ‘g’, and ‘d’ in the 10’SHR digit. Table 1 shows the correspondence between the drive phases and the segments that light.

Note that figure 1 is a generalized LED panel and not an exact representation of any particular product.

Figure 1 LED Panel and LED Segments

Table 1 Segment Lighting Correspondences for the Drive Phases

No.	Pin	Drive phase 1	Drive phase 2
1	AM & PM	AM	PM
2	10’SHRag & d	10’SHR ad	10’SHR g
3	10’SHRb & e	10’SHR e	10’SHR b
4	10’SHRc & HRe	HR e	10’SHR c
5	HRb & g	HR g	HR b
6	HRc & d	HR d	HR c
7	HRa & f	HR f	HR a
8	10’SMIN a & f	10’SMIN a	10’SMIN f
9	10’SMIN b & g	10’SMIN b	10’SMIN g
10	10’SMIN c & d	10’SMIN c	10’SMIN d
11	10’SMINe & MINe	MIN e	10’SMIN e
12	MIN b & g	MIN g	MIN b
13	MIN c & d	MIN d	MIN c
14	MIN a & f	MIN f	MIN a
15	COLON	COLON	—
16	ALM INDICATOR	ALM-A	ALM-B

No. 4659-9/34

LC85632

Figure 2 shows the sections where LEDs are lit for each drive phase. This figure is based on the generalized drawing shown in figure 1, and the shaded sections show the segments that are lit by the corresponding phase.

Figure 2 LED Sections Lit by the Drive Phases

No. 4659-10/34

LC85632

Figure 3 shows actual wiring examples for 12 hour and 24 hour displays for the Tottori Sanyo, Ltd., SL-1042-30T LED panel. However, since the SL-1042-30T LED panel does not have an alarm A display LED, an external LED is used for alarm A display. Also, the calendar day/month display cannot be used with this circuit.

Figure 3 LED Panel Wiring Examples

No. 4659-11/34