CF5746ABA datasheet(5/7 Pages) NPC

5 / 7 page

CF5746 Series

NIPPON PRECISION CIRCUITS—5

Motor Output

The motor output can be matched to the clock using

a step needle movement (3 options) or a continuous

needle movement (1 option), depending on the

device selected.

Test Functions

Open-circuit output

When AI/SNZ is open circuit, a 512 Hz tone is

output (except on the CF5746AFA and AGA).

Time shortening function

This function is used to reduce the alarm output

snooze interval and the auto-stop time. This function

is active under either of the following conditions.

TEST must be HIGH.

OUT1 and OUT2 must both be HIGH.

Note that devices other than the CF5746BCA (that

is, the step needle movement devices) also have

reduced motor output needle periods for the case

where TEST is HIGH.

Power-ON Clear Function

When power is ﬁrst applied, the snooze state and

alarm auto-stop state are reset to their default values.

CF5746AAB

CF5746AB A

CF5746BCA

CF5746ADC

CF5746AEA

CF5746AFA

CF5746AG A

Active level

HIGH

–

HIGH

Needle period tCY (s)

0.125

1111

Pulsewidth tPW (ms)

23.4375

31.25

50% duty

46.875

31.25

46.875

31.25

Movement

Step

Continuous

Step

TEST = HIGH

OUT1 = OUT2 = HIGH

Motor output needle period

1/4

––––

Alarm output

Unmodulated

–

Unmodulated

–

Auto-stop time

1/1024

Snooze interval

1/1024

Device

AAB

ADC

AEA

AFA (AO1)

AGA (AO1)

ABA

AFA (AO2)

AGA (AO2)

BCA

AAB

ADC

AEA

AFA (AO1)

AGA (AO1)

ABA

AFA (AO2)

AGA (AO2)

BCA

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