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| Prescaler DN8522S-A Prescaler IC for CATV s Overview The DN8522S-A is 1.7 GHz prescaler IC for CATV. It is made up of ECL flip-flop circuit which can be switched to the dividing ratios of 64, 128 or 256. 0.40.25 0.60.3 Unit: mm 1 8 5.00.3 s Features * Power dissipation: 5 V, 26 mA * To be switched to the dividing ratios of 64, 128 and 256 * ECL-level output 1.27 4 5 * Television, VCR 0.10.1 0.3 4.20.3 6.50.3 SOP008-P-0225A s Block Diagram VCC Input 1 Ref. 8 1/2 1/2 1/2 1/2 2V CC 1/2 1/2 1/4 Switch 1/8 4 Output Buff. amp. GND 3 6 GND M1 M2 5 1.50.2 0.15 0.65 s Applications 1 DN8522S-A s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 Input pin Supply voltage pin Dividing ratio select pin: M1 Output pin GND pin Dividing ratio select pin: M2 N.C. Bias (Ref.) pin Description Prescaler s Absolute Maximum Ratings Parameter Supply voltage Supply current Power dissipation *2 *1 Symbol VCC ICC PD Topr Tstg Rating 6.0 40 160 -20 to +80 -55 to +125 Unit V mA mW C C Operating ambient temperature Storage temperature *1 Note) 1. *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: The power dissipation shown is for the IC package at Ta = 80C s Recommended Operating Range Parameter Supply voltage Symbol VCC Range 4.5 to 5.5 Unit V s Electrical Characteristics at Ta = 25C Parameter Supply voltage Supply current Input frequency Input signal level Output amplitude High-level input voltage Low-level input voltage Symbol VCC ICC fIN VIN1 VO VIH VIL VCC = 5 V VCC = 5.0 V, VIN = -15 dBm VCC = 5.0 V, Ta = -20C to 80C fIN = 0.6 GHz to 1.7 GHz VCC = 5 V, fIN = 1.7 GHz VIN = -10 dBm, divided by 64 Dividing ratio select voltage pin 3, pin 6 Dividing ratio select voltage pin 3, pin 6 Conditions Min 4.5 0.6 -15 0.6 0.7 x VCC Typ 5.0 26 1.0 Max 5.5 36 1.7 +3 1.6 0.2 x VCC Unit V mA GHz dBm V[p-p] V V 2 Prescaler s Application Circuit Example DN8522S-A Input 1 0.001 F Ref. 8 0.001 F 1/2 1/2 1/2 1/2 2 VCC 5 V 1/2 1/2 1/4 Switch 1/8 4 Output Buff. amp. 3 6 M1 M2 Dividing ratio select pin: M1/M2 settings and related dividing ratios are as follows: High = VCC , Low = GND Pin 3 M1 Low Low High High Pin 6 M2 Low High Low High 1/64 Dividing ratio 1/256 1/128 GND 5 3 |
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