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CF5746AAB Datasheet(PDF) 5 Page - Nippon Precision Circuits Inc

Part No. CF5746AAB
Description  CMOS Analog Clock IC
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Maker  NPC [Nippon Precision Circuits Inc]
Homepage  http://www.npc.co.jp/en
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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.
s
TEST must be HIGH.
s
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
HIGH
HIGH
HIGH
HIGH
Needle period tCY (s)
1
1
0.125
1111
Pulsewidth tPW (ms)
23.4375
31.25
50% duty
46.875
31.25
46.875
31.25
Movement
Step
Step
Continuous
Step
Step
Step
Step
TEST = HIGH
OUT1 = OUT2 = HIGH
Motor output needle period
1/4
1/4
––––
Alarm output
Unmodulated
Unmodulated
Auto-stop time
1/1024
1/1024
1/1024
1/1024
1/1024
1/1024
Snooze interval
1/1024
1/1024
1/1024
1/1024
1/1024
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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