Prescaler DN8522S-A Prescaler IC for CATV ■ Overview 1 8 5.0±0.3 0.6±0.3 0.4±0.25 Unit: mm 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. 0.1±0.1 ■ Applications • Television, VCR 4 5 0.3 4.2±0.3 6.5±0.3 1.5±0.2 • Power dissipation: 5 V, 26 mA • To be switched to the dividing ratios of 64, 128 and 256 • ECL-level output 0.15 0.65 1.27 ■ Features SOP008-P-0225A ■ Block Diagram VCC Input 1 1/2 1/2 4 Output GND 5 Buff. amp. GND M2 6 1/2 1/4 Switch 1/8 3 1/2 1/2 M1 Ref. 8 2 V CC 1/2 1 DN8522S-A Prescaler ■ Pin Descriptions Pin No. Description 1 Input pin 2 Supply voltage pin 3 Dividing ratio select pin: M1 4 Output pin 5 GND pin 6 Dividing ratio select pin: M2 7 N.C. 8 Bias (Ref.) pin ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 6.0 V ICC 40 mA PD 160 mW Topr −20 to +80 °C Tstg −55 to +125 °C Supply voltage Supply current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Note) 1. *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: The power dissipation shown is for the IC package at Ta = 80°C ■ Recommended Operating Range Parameter Symbol Range Unit VCC 4.5 to 5.5 V Supply voltage ■ Electrical Characteristics at Ta = 25°C Parameter 2 Symbol Conditions Min Typ Max Unit 4.5 5.0 5.5 V Supply voltage VCC Supply current ICC VCC = 5 V 26 36 mA Input frequency fIN VCC = 5.0 V, VIN = −15 dBm 0.6 1.7 GHz Input signal level VIN1 VCC = 5.0 V, Ta = −20°C to 80°C fIN = 0.6 GHz to 1.7 GHz −15 +3 dBm Output amplitude VO VCC = 5 V, fIN = 1.7 GHz VIN = −10 dBm, divided by 64 0.6 1.0 1.6 V[p-p] High-level input voltage VIH Dividing ratio select voltage pin 3, pin 6 0.7 × VCC V Low-level input voltage VIL Dividing ratio select voltage pin 3, pin 6 0.2 × VCC V Prescaler DN8522S-A ■ Application Circuit Example Input 1 0.001 µF Ref. 8 2 1/2 1/2 1/2 VCC 5 V 1/2 0.001 µF 4 Output 5 Buff. amp. GND M2 M1 6 1/2 1/4 Switch 1/8 3 1/2 Dividing ratio select pin: M1/M2 settings and related dividing ratios are as follows: High = VCC , Low = GND Pin 3 M1 Pin 6 M2 Dividing ratio Low Low 1/256 Low High 1/128 High Low High High 1/64 3