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CF5746AAB Datasheet(PDF) 1 Page - Nippon Precision Circuits Inc |
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CF5746AAB Datasheet(HTML) 1 Page - Nippon Precision Circuits Inc |
1 / 7 page CF5746 Series NIPPON PRECISION CIRCUITS—1 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. 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 CF5746AAB CF5746AB A CF5746BCA CF5746ADC CF5746AEA CF5746AFA CF5746AG A Built-in capacitance XT pin CG (pF) None None None None None None None XT pin CG (pF) 30 30 30 20 30 30 30 Motor output 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 AI/SNZ input Alarm active level LOW LOW LOW HIGH LOW LOW LOW Pin type 512 Hz 512 Hz 512 Hz 512 Hz 512 Hz Pull-up Pull-up SNZ interface Yes Yes Yes No Yes Yes Yes SNZ time tSNZ (s) 256 256 256 256 256 256 256 Bounce delay (ms) 31.25 31.25 31.25 31.25 31.25 31.25 31.25 SNZ release No No No No No Yes (2 s) Yes (2 s) Alarm output Pins AO AO AO1 AO2 AO1 AO2 AO AO AO AO AO1 AO2 AO1 AO2 Active level HIGH LOW1 1. AO has the opposite polarity to AO only when output (same phase when non-active). HIGH HIGH HIGH HIGH HIGH LOW1 HIGH LOW1 HIGH HIGH HIGH HIGH Frequency fPW (Hz) 4096 4096 DC DC DC DC 2048 2048 2048 2048 2048 DC 2048 DC Modulation fCY(Hz) 8+1 8+1 –––– 8+1 8+1 8+1 8+1 8+1 – 8+1 – Duty (%) Step 1 12.5 12.5 –––– 6.26 6.26 6.26 6.26 12.5 – 6.26 – Step 2 25 25 –––– 12.5 12.5 12.5 12.5 25 – 12.5 – Step 3 50 50 –––– 25 25 50 50 50 – 50 – Step 4 –––––– 50 50 –––––– Step time (s) Step 1 0 to 7 0 to 7 –––– 0 to 3 0 to 3 0 to 7 0 to 7 0 to 7 – 0 to 7 – Step 2 7 to 15 7 to 15 –––– 3 to 7 3 to 7 7 to 15 7 to 15 7 to 15 – 7 to 15 – Step 3 15 to AS2 2. AS = auto-stop 15 to AS –––– 7 to 31 7 to 31 15 to AS 15 to AS 15 to AS – 15 to AS – Step 4 –––––– 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) 128 128 128 128 128 128 128 Pad layout AABAAAA Other Power-ON clear, oscillator Rd and Rf built-in |
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