LM8560 datasheet(3/9 Pages) UTC

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UTCLM8560

MOS IC

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R502-005,D

ELECTRICAL CHARACTERISTICS (Ta=25°C, VDD=-12V unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

Input “H” Level Current 1

IIH1

50/60Hz Input, VIN=VSS

µA

Input “L” Level Current 1

IIL1

50/60Hz Input, VIN=VDD

µA

Input “H” Level Current 2

IIH2

Input Pins Other Than 50/60Hz Input

VIN=VSS

µA

Input “L” Level Current 2

IIL2

Input Pins Other Than 50/60Hz Input

VIN=VDD

µA

Output “H” Level Current 1

IOH1

Alarm Output and Sleep Output

VOH=VSS-1V

Output Leakage Current 1

IOF1

Alarm Output and Sleep Output

VOUT=VDD

µA

Output “H” Level Current 2

IOH2

AM & 10’S HR ag & de (24H mode)

VOUT=VDD-1V

Output Leakage Current 2

IOF2

AM & 10’S HR ag & de (24H mode)

VOUT=VDD

µA

Output “H” Level Current 3

IOH3

Segment Output Other Than Those

VOUT=VSS-1V

Output Leakage Current 3

IOF3

Segment Output Other Than Those

Listed Above, VOUT=VDD

µA

Power failure detection

Voltage

VDD

-7.5

-5

Consumption Current

ICC

Output set to off and Pull-down attached

input set open

Backup Oscillator Stability

Factor

Standard Value,900Hz,

VDD=-9V±10%-10

-10

Backup Oscillator

Accuracy

Standard Value,900Hz, VDD=-9V-10

-10

DESCRIPTION OF OPERATIONS

*50/60Hz Input:

Built-in Shumidt circuit enables noise eliminations at 50/60Hz commercial frequencies with use of a

simple CR filter. Built-in pull-up resistor.

*CR Input:

When the AC power supply is interrupted, the time counter switches to a holding state and a built-in

oscillator promptly begins operation. If 50/60Hz input continues for 3 clocks without arriving, this

oscillator’s output is activated and functions as the time counter clock in place of 50/60Hz input. The

frequency level of this clock oscillator is determined according to the CR value. While the above

mentioned oscillator is operating using backup mode, all segment output is switched to OFF.

(Note) When the backup oscillator is in use due to an AC power supply interruption, the 50/60Hz input

pin must be maintained open or at a VSS level.

*50/60 Selective Input:

When 50/60 selective input is connected to VSS, 50Hz use is enabled. When 50/60 selective input is

left open, VDD is activated using an internal pull-down resistor and the setting is switched to enable use

at 60Hz.

*Display Mode Selective Input (Alarm Select/Sleep Select):

Since the pull-down resistor is built-in , selection from four display modes is possible using two SPST

switches (single-pole and single-throw switches). Table 1 shows these display mode selections.

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