SM8222 Nippon Precision Circuits Inc, SM8222 Datasheet
SM8222
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SM8222 Summary of contents
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... NIPPON PRECISION CIRCUITS INC. OVERVIEW The SM8222A calling number identification (caller ID) and call waiting signal (dual tone signal) receiver decoder IC that conforms with the TR- NWT-000030 and SR-TSV-002476 (Bellcore) dialer FEATURES Conforms to TR-NWT-000030 and SR-TSV- 002476 (Bellcore) standards Call waiting ...
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... PACKAGE DIMENSIONS (Unit: mm) 24-pin SOP 0.25 15.24 0.20 1.27 0.10 0.45 0.10 0.13 M BLOCK DIAGRAM TIP Amplifier RING GS CAP AGND Bias Generator Oscillator OSCIN OSCOUT RDIN SM8222A/B 24-pin DIP 0.50 0.20 FSKEN FSK Filter Demodulator Carrier Detector Data Filter Detector (2130Hz) (2130Hz) Level Filter Detector Data Filter Detector (2750Hz) (2750Hz) Level ...
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... O 23 STGT I/O 24 VDD – SM8222A/B Description Tip input: Connected to the telephone through a protection circuit. Ring input: Connected to the telephone through a protection circuit. Input stage amplifier output: Used to select the input amplifier gain Analog ground: Internal reference voltage (V DD Reference voltage capacitor connection 0.1 µF Ring detect input: Line reversal and ring signal detect input ...
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... Clock frequency Clock frequency accuracy Operating temperature SM8222A Condition SM8222A V DD SM8222B stg Condition SM8222A V DD SM8222B f CLK opr Rating Unit 0.5 to 5.0 0.5 to 7 125 Rating Unit typ ...
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... HIGH-level input voltage 1 LOW-level input voltage 2 HIGH-level input voltage 2 LOW-level input voltage 3 HIGH-level input voltage 3 LOW-level output current HIGH-level output current Input leakage current Output leakage current SM8222A/B = 3.579545 MHz Condition OSCIN = PWDN = RDIN = RDRC = MODE = ...
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... V, GND = CLK P arameter Input sensitivity Bandpass filter frequency response (relative gain for 1700 Hz sine wave input) Carrier detect sensitivity No-carrier detect sensitivity Oscillator frequency SM8222A/B = 3.579545 MHz Condition 60 Hz 1200 Hz 2200 Hz 4000 Hz 10,000 Hz ...
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... V, GND = CLK P arameter Low tone frequency High tone frequency Detection frequency deviation No-detection frequency deviation Detection sensitivity No-detection sensitivity Signal level difference SM8222A/B = 3.579545 MHz Condition 3.579545 MHz ...
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... Carrier detect ON time Final data to carrier detect OFF time SM8222B V = 5.0 ± 0.5 V, GND = CLK P arameter Power-down release to oscillator start time Carrier detect ON time Final data to carrier detect OFF time SM8222A/B = 3.579545 MHz Condition VOL ...
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... CLK P arameter Rise time Fall time LOW-level pulsewidth HIGH-level pulsewidth DCLK frequency Input/output delay DOUT to DCLK delay DCLK to DOUT delay DCLK to DR delay Data rate SM8222A/B = 3.579545 MHz Condition t DR, DCLK, DOUT r0 t DR, DCLK, DOUT f0 ...
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... DR to DCLK hold time SM8222B V = 5.0 ± 0.5 V, GND = CLK P arameter DCLK rise time DCLK fall time Duty Frequency DCLK to DR setup time DR to DCLK hold time SM8222A/B = 3.579545 MHz Condition t DCLK r1 t DCLK f1 DCLK ...
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... The two signals are recovered using two high-order filters with center frequencies of 2130 and 2750 Hz, respectively, in the final stage. The SM8222A/B uses a detection circuit with time delay built-in so that detection is maintained for an input signal where the input level temporarily rises above the rated value or falls below the rated value to a level of non-detection ...
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... TIMING DIAGRAMS Ring Detector and FSK Demodulator 1st Ring L1/L2 RDRC RDET PDWN CDET DOUT OSCOUT SM8222A/B 101010... 1 Data t DAQ 101010...1 Data t DOSC 2nd Ring t DCH NIPPON PRECISION CIRCUITS—12 ...
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... Output Mode 0 DOUT DCLK STOP START TIP/RING IDD DOUT STOP DCLK DR SM8222A DCD CDD PWL PWH PWL t f0 STOP START PWL 90% 10 ...
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... Output Mode 1 DCLK N Input Data b7 STOP START DR t DDS t DDH DCLK DATA SM8222A N 1/f DCLK1 0. STOP NIPPON PRECISION CIRCUITS—14 ...
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... SM8222B All circuit component values are shown for reference only. These values are not guaranteed for mass production specification. NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement ...