CF5746 Series
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.
CF5746AAB
Active level
Needle period t
CY
(s)
Pulsewidth t
PW
(ms)
Movement
HIGH
1
23.4375
Step
C F 5 7 4 6 A BA
HIGH
1
31.25
Step
CF5746BCA
–
0.125
50% duty
Continuous
CF5746ADC
HIGH
1
46.875
Step
CF5746AEA
HIGH
1
31.25
Step
C F 5 7 4 6 A FA
HIGH
1
46.875
Step
C F 5 7 4 6 AG A
HIGH
1
31.25
Step
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
s
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.
Motor output needle period
Alarm output
Auto-stop time
Snooze interval
1/4
Unmodulated
1/1024
1/1024
AAB
ADC
AEA
AFA (AO1)
AGA (AO1)
TEST = HIGH
1/4
–
1/1024
1/1024
ABA
AFA (AO2)
AGA (AO2)
–
–
1/1024
1/1024
–
Unmodulated
1/1024
1/1024
AAB
ADC
AEA
AFA (AO1)
AGA (AO1)
OUT1 = OUT2 = HIGH
–
–
1/1024
1/1024
ABA
AFA (AO2)
AGA (AO2)
–
–
1/1024
1/1024
Device
BCA
BCA
Power-ON Clear Function
When power is first applied, the snooze state and
alarm auto-stop state are reset to their default values.
NIPPON PRECISION CIRCUITS—5
NPC [ NIPPON PRECISION CIRCUITS INC ]
