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CF5746AGA

更新时间： 2024-09-26 22:20:07
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描述
CMOS Analog Clock IC

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CF5746AGA 数据手册

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CF5746 Series  
CMOS Analog Clock IC  
NIPPON PRECISION CIRCUITS INC.  
■ Alarm outputs  
OVERVIEW  
• Compatible with electronic sound alarms and  
motor bells  
• 4-step increasing volume alarm output  
(CF5746AAB, ADC, AEA, AFA (AO1), AGA  
(AO1))  
■ Snooze function  
• Temporarily stops alarm output and then re-  
starts after a fixed time  
The CF5746 Series devices are analog clock ICs that  
derive their timing from a 32 kHz oscillator element.  
They feature alarm outputs, snooze function and  
alarm auto-stop function. They can be configured to  
match a wide variety of clock specifications, alarm  
functions and motor outputs.  
■ Debouce circuit (AI/SNZ pin)  
■ Test functions  
• Shortening snooze time and auto-stop time  
• Increasing motor speed (excluding  
CF5746BCA)  
FEATURES  
■ 32.768 kHz oscillator circuit  
• R and R built-in  
f
d
• Oscillator capacitance built-in  
- C = 30 pF (typ, excluding CF5746ADC)  
■ Power-ON clear function  
■ 1.5 V supply voltage  
D
- C = 20 pF (typ, CF5746ADC)  
D
■ Chip form  
SERIES CONFIGURATION  
CF5746AAB  
None  
30  
CF5746ABA  
None  
30  
CF5746BCA  
None  
30  
CF5746ADC  
None  
20  
CF5746AEA  
None  
30  
CF5746AFA  
None  
30  
CF5746AGA  
None  
30  
XT pin CG (pF)  
XT pin CG (pF)  
Active level  
Built-in  
capacitance  
HIGH  
1
HIGH  
1
–
HIGH  
1
HIGH  
1
HIGH  
1
HIGH  
1
Motor output Needle period tCY (s)  
Pulsewidth tPW(ms)  
Alarm active level  
0.125  
50% duty  
LOW  
512 Hz  
Yes  
23.4375  
LOW  
512 Hz  
Yes  
31.25  
LOW  
512 Hz  
Yes  
46.875  
HIGH  
512 Hz  
No  
31.25  
LOW  
512 Hz  
Yes  
46.875  
LOW  
Pull-up  
Yes  
31.25  
LOW  
Pull-up  
Yes  
Pin type  
SNZ interface  
AI/SNZ input  
SNZ time tSNZ (s)  
256  
256  
256  
256  
256  
256  
256  
Bounce delay (ms)  
SNZ release  
Pins  
31.25  
No  
31.25  
No  
31.25  
No  
31.25  
No  
31.25  
No  
31.25  
Yes (2 s)  
31.25  
Yes (2 s)  
AO  
AO  
AO1  
AO2  
AO1  
AO2  
AO  
AO  
AO  
AO  
AO1  
AO2  
AO1  
AO2  
Active level  
HIGH LOW1 HIGH HIGH HIGH HIGH HIGH LOW1 HIGH LOW1 HIGH HIGH HIGH HIGH  
Frequency fPW (Hz)  
Modulation fCY(Hz)  
Step 1  
4096  
8+1  
12.5  
25  
4096  
8+1  
12.5  
25  
DC  
–
DC  
–
DC  
–
DC  
–
2048  
8+1  
6.26  
12.5  
25  
2048  
8+1  
6.26  
12.5  
25  
2048  
8+1  
6.26  
12.5  
50  
2048  
8+1  
6.26  
12.5  
50  
2048  
8+1  
12.5  
25  
DC  
–
2048  
8+1  
DC  
–
–
–
–
–
–
6.26  
12.5  
50  
–
Step 2  
Duty (%)  
–
–
–
–
–
–
Step 3  
50  
50  
–
–
–
–
50  
–
–
Step 4  
–
–
–
–
–
–
50  
50  
–
–
–
–
–
–
Alarm output  
Step 1  
Step 2  
0 to 7 0 to 7  
7 to 15 7 to 15  
–
–
–
–
0 to 3 0 to 3 0 to 7 0 to 7 0 to 7  
3 to 7 3 to 7 7 to 15 7 to 15 7 to 15  
–
0 to 7  
7 to 15  
–
–
–
–
–
–
–
Step time  
(s)  
15 to  
AS2  
15 to  
AS  
15 to  
AS  
15 to  
AS  
15 to  
AS  
15 to  
AS  
Step 3  
Step 4  
–
–
–
–
–
–
–
–
7 to 31 7 to 31  
–
–
–
–
31 to  
AS  
31 to  
AS  
–
–
–
–
–
–
IOH min (mA)  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
−0.8  
IOL min (mA)  
0.8  
0.8  
0.8  
0.8  
0.8  
0.8  
0.002 0.002  
0.8  
0.8  
0.002  
0.8  
0.002  
0.8  
Auto-stop tSTOP (s)  
128  
A
128  
A
128  
B
128  
A
128  
A
128  
A
128  
Pad layout  
Other  
A
Power-ON clear, oscillator Rd and Rf built-in  
1. AO has the opposite polarity to AO only when output (same phase when non-active).  
2.AS = auto-stop  
NIPPON PRECISION CIRCUITS—1  
1234567

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