Document
CF5746 Series
NIPPON PRECISION CIRCUITS INC.
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.
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FEATURES
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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)
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Alarm outputs • 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 restarts after a fixed time Debouce circuit (AI/SNZ pin) Test functions • Shortening snooze time and auto-stop time • Increasing motor speed (excluding CF5746BCA) Power-ON clear function 1.5 V supply voltage Chip form
SERIES CONFIGURATION
XT pin CG (pF) 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 Step 4 Alarm output Step 1 Step 2 Step time Step 3 (s) Built-in capacitance Step 4 IOH min (mA) IOL min (mA) Auto-stop tSTOP (s) Pad layout Other CF5746AAB None 30 HIGH 1 23.4375 LOW 512 Hz Yes 256 31.25 No AO AO HIGH LOW 1 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 AS AS 2 – −0.8 0.8 128 A – −0.8 0.8 C F 5 7 4 6 A BA None 30 HIGH 1 31.25 LOW 512 Hz Yes 256 31.25 No AO1 AO2 HIGH HIGH DC DC – – – – – – – – – – – – – – – – −0.8 0.8 128 A – – −0.8 0.8 CF5746BCA None 30 – 0.125 50% duty LOW 512 Hz Yes 256 31.25 No AO1 AO2 HIGH HIGH DC DC – – – – – – – – – – – – – – – – – – CF5746ADC None 20 HIGH 1 46.875 HIGH 512 Hz No 256 31.25 No AO AO HIGH LOW 1 2048 2048 8+1 8+1 6.26 6.26 12.5 12.5 25 25 50 50 0 to 3 0 to 3 3 to 7 3 to 7 7 to 31 7 to 31 CF5746AEA None 30 HIGH 1 31.25 LOW 512 Hz Yes 256 31.25 No AO AO HIGH LOW 1 2048 2048 8+1 8+1 6.26 6.26 12.5 12.5 50 50 – – 0 to 7 0 to 7 7 to 15 7 to 15 15 to 15 to AS AS 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 0.002 128 A – −0.8 0.8 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 0.002 128 A – −0.8 0.8
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 B A 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
CF5746 Series
PAD DIMENSIONS
L ayout No. A (ex. BCA)
10 9 1 2 8
Dimensions (µm) X 166 166 166 166 444 1444 1444 1444 1444 1192 Y 1210 882 474 228 169 169 513 1219 1516 1531
B (BCA) VSS VDD AI/SNZ AO1 AO2 OUT1 OUT2 TEST XT XT
1 2 3 4 5 6
VDD VSS OUT1 AI/SNZ TEST OUT2 AO (AO1) AO (AO2) XT XT
3 Y 4 (0, 0) X 5
7 6
7 8 9 10
Chip size: 1.61 × 1.70 mm Chip thickness: 400 ± 30 µm Pad size: 100 × 100 µm Chip surface is at V DD potential.
BLOCK DIAGRAM
TEST VDD VSS
XT XT CD
4- Stage Divider
11- Stage Divider
Output Control
OUT1 OUT2
AO Duty Control
AO(AO1) AO(AO2)
4- Stage Divider
Alarm Out
Snooze Counter
Input Control
AI/SNZ
NIPPON PRECISION CIRCUITS—2
CF5746 Series
PIN DESCRIPTION
Name VDD VSS XT XT OUT1 OUT2 AI/SNZ AO (AO1) AO (AO2) TEST Positive supply voltage pin Ground pin Oscillator input pin Oscillator output pin Motor output pin 1 Motor output pin 2 Alarm/snooze input pin Alarm output pin Alarm output pin Test pin Description
SPECIFICATIONS
Absolute Maximum Ratings
P arameter Supply voltage range Input voltage range Operating temperature range Storage temperature range Symbol V DD − V SS V IN Topr Tstg Condition Rating −0.3 to 5.0 V SS to V DD −30 to 70 −40 to 125 Unit V V °C °C
Electrical Characteristics
Ta = 25 °C, VDD = 1.5 V, VSS = 0 V, f0 = 32.768 kHz unless otherwise noted
Rating P arameter Operating voltage Current consumption1 Motor output current Alarm HIGH-level output current Alarm LOW-level output current2 Alarm LOW-level output current3 AI/SNZ HIGH-level input voltage AI/SNZ LOW-level input voltage AI/SNZ HIGH-level output current AI/SNZ LOW-level output current Oscillator frequency stability VDD-to-XT pin built-in capacitance VDD-to-XT pin built-in capacitance IOL V IH V IL IOH IOL ∆f/f CG Excluding CF5746ADC CD CF5746ADC
VOH = V DD − 1.5 V VOL = V DD + 1.5 V
Symbol V DD IDD IMOT IOH
Condition min 1.2 No load – V DD = 1.2 V, RL = 200 Ω V DD = 1.2 V, VOH = 0.7 V V DD = 1.2 V, VOL = 0.5 V ±3.8 −0.8 0.8 2 V DD − 0.2 V SS Excluding CF5746AFA, AGA −1 1 – – – – 1.0 – −1.5 1.5 15 – – −3 3 0.5 None 30 20 2.0 – – – 30 V DD V .