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Número de pieza | CF5746AAB | |
Descripción | CMOS Analog Clock IC | |
Fabricantes | Nippon Precision Circuits Inc | |
Logotipo | ||
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CF5746 Series
CMOS Analog Clock IC
OVERVIEW
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.
FEATURES
s 32.768 kHz oscillator circuit
• Rf and Rd built-in
• Oscillator capacitance built-in
- CD = 30 pF (typ, excluding CF5746ADC)
- CD = 20 pF (typ, CF5746ADC)
s Alarm outputs
• Compatible with electronic sound alarms and
motor bells
• 4-step increasing volume alarm output
(CF5746AAB, ADC, AEA, AFA (AO1), AGA
(AO1))
s Snooze function
• Temporarily stops alarm output and then re-
starts after a fixed time
s Debouce circuit (AI/SNZ pin)
s Test functions
• Shortening snooze time and auto-stop time
• Increasing motor speed (excluding
CF5746BCA)
s Power-ON clear function
s 1.5 V supply voltage
s Chip form
SERIES CONFIGURATION
Built-in
XT pin CG (pF)
capacitance XT pin CG (pF)
Active level
Motor output Needle period tCY (s)
Pulsewidth tPW(ms)
Alarm active level
Pin type
SNZ interface
AI/SNZ input
SNZ time tSNZ (s)
Bounce delay (ms)
SNZ release
Pins
Active level
Frequency fPW (Hz)
Modulation fCY(Hz)
Step 1
Step 2
Duty (%)
Step 3
Alarm output
Step 4
Step 1
Step 2
Step time
(s) Step 3
Step 4
Pad layout
Other
IOH min (mA)
IOL min (mA)
Auto-stop tSTOP (s)
CF5746AAB
None
30
HIGH
1
23.4375
LOW
512 Hz
Yes
256
31.25
No
AO AO
HIGH LOW1
4096 4096
8+1 8+1
12.5 12.5
25 25
50 50
––
0 to 7 0 to 7
7 to 15 7 to 15
15 to 15 to
AS2 AS
CF5746ABA
None
30
HIGH
1
31.25
LOW
512 Hz
Yes
256
31.25
No
AO1 AO2
HIGH HIGH
DC DC
––
––
––
––
––
––
––
––
––––
−0.8 −0.8
0.8 0.8
128
A
−0.8 −0.8
0.8 0.8
128
A
CF5746BCA CF5746ADC CF5746AEA
None
None
None
30 20 30
–
HIGH
HIGH
0.125
1
1
50% duty
46.875
31.25
LOW HIGH LOW
512 Hz
512 Hz
512 Hz
Yes No Yes
256 256 256
31.25
31.25
31.25
No No No
AO1 AO2 AO AO AO AO
HIGH HIGH HIGH LOW1 HIGH LOW1
DC DC 2048 2048 2048 2048
– – 8+1 8+1 8+1 8+1
– – 6.26 6.26 6.26 6.26
– – 12.5 12.5 12.5 12.5
– – 25 25 50 50
– – 50 50 – –
– – 0 to 3 0 to 3 0 to 7 0 to 7
– – 3 to 7 3 to 7 7 to 15 7 to 15
–
–
7 to 31 7 to 31
15 to
AS
15 to
AS
–
–
31 to 31 to
AS AS
–
–
−0.8 −0.8 −0.8 −0.8 −0.8 −0.8
0.8 0.8 0.002 0.002 0.8 0.8
128 128 128
BAA
Power-ON clear, oscillator Rd and Rf built-in
C F 5 7 4 6 A FA
None
30
HIGH
1
46.875
LOW
Pull-up
Yes
256
31.25
Yes (2 s)
AO1 AO2
HIGH HIGH
2048 DC
8+1 –
12.5 –
25 –
50 –
––
0 to 7 –
7 to 15 –
15 to
AS
–
––
−0.8 −0.8
0.002 0.8
128
A
1. AO has the opposite polarity to AO only when output (same phase when non-active).
2. AS = auto-stop
C F 5 7 4 6 AG A
None
30
HIGH
1
31.25
LOW
Pull-up
Yes
256
31.25
Yes (2 s)
AO1 AO2
HIGH HIGH
2048 DC
8+1 –
6.26 –
12.5 –
50 –
––
0 to 7 –
7 to 15 –
15 to
AS
–
––
−0.8 −0.8
0.002 0.8
128
A
NIPPON PRECISION CIRCUITS—1
1 page 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.
Active level
Needle period tCY (s)
Pulsewidth tPW (ms)
Movement
CF5746AAB
HIGH
1
23.4375
Step
CF5746ABA
HIGH
1
31.25
Step
CF5746BCA
–
0.125
50% duty
Continuous
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.
Motor output needle period
Alarm output
Auto-stop time
Snooze interval
Device
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)
Power-ON Clear Function
When power is first applied, the snooze state and
alarm auto-stop state are reset to their default values.
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
–
–
1/1024
1/1024
BCA
–
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
BCA
NIPPON PRECISION CIRCUITS—5
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet CF5746AAB.PDF ] |
Número de pieza | Descripción | Fabricantes |
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