IL8560 View Datasheet(PDF) - Integral Corp.

Part Name

Description

Manufacturer

IL8560

CLOCK CIRCUIT

Integral Corp. 

IL8560

CLOCK CIRCUIT

INTEGRAL

FEATURES

• LED direct drive by time-sharing

(duplex)

• Wide operating voltage range

• Alarm on a 24-hour basis

• Time format: 12-hour AM/PM and 24-

hour

• On-chip RC-oscillator for battery

backup

• 50Hz or 60Hz is usable as the

reference frequency

• Possible to automatically advance

"hours", "minutes"

• Sleep timer (max. 59 minutes or 1

hour 59 minutes)

• Repeatedly usable snooze

• Power failure indicator

• 900Hz output for alarm tone

• Bare chip or SOP-28 are available

• Pin-to-Pin replacement with Sanyo

LM8560

FUNCTIONS

• Real time display

• Alarm with snooze

• Sleep timer (max. 59 minutes or 1 hour 59

minutes)

PIN CONNECTION

OPERATION DESCRIPTION

50Hz/60Hz Input:

CR Input:

50/60 select input:

Display mode select input

(alarm display/sleep display);

The on-chip Schmitt trigger circuit allows a simple RC filter at the

input to remove possible line voltage transients. An internal pull-up

resister is provided.

Then AC power-down occurs, the time counter enters the "hold" mode and

the on-chip clock oscillator starts operating immediately. If there is no input at

"50/60 Hz input" during 3-clock period, this oscillator controls the time counter

advance instead of "50/60Hz input". The values of CR determine the

frequency of the on-chip clock oscillator. All segment outputs are off during

backup oscillator operation.

NOTE: If the backup OSC is used at the power-down mode, "50/60Hz

input" must be open or at Vss level.

Connecting "50/60Hz select" to Vss enables 50Hz operation. For 60Hz

operation, "50/60Hz select" is left unconnected: Pull-down to VDD is provided

by the internal pulldown resister.

The internal pull-down resistor allows the use of 2 SPST (single-pole single-

throw) switches to select 4 display modes listed in Table 1.

1

BELMICROSYSTEMS

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