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MC12079

Part Number	MC12079
Manufacturer	Motorola
Description	MECL PLL COMPONENTS 64/128/256 PRESCALER
Published	Apr 26, 2005
Detailed Description	Order this document by MC12079/D MC12079 2.8 GHz Prescaler The MC12079 is a single modulus divide by 64, 128, 256 presc...
Datasheet	MC12079 PDF File

Overview

Order this document by MC12079/D MC12079 2.
8 GHz Prescaler The MC12079 is a single modulus divide by 64, 128, 256 prescaler for low power frequency division of a 2.
8 GHz (typical) high frequency input signal.
Divide ratio control inputs SW1 and SW2 select the required divide ratio of ÷64, ÷128, or ÷256.
An external load resistor is required to terminate the output.
A 1.
2 kΩ resistor is recommended to achieve a 1.
6 Vpp output swing, when dividing a 1.
1 GHz input signal by the minimum divide ratio of 64, assuming a 12 pF load.
Output current can be minimized dependent on conditions such as output frequency, capacitive load being driven, and output voltage swing required.
Typical values for load resistors are included in the Vout specification for various divide ratios at 2.
8 GHz input frequency.
• 2.
8 GHz Toggle Frequency MECL PLL COMPONENTS ÷64/128/256 PRESCALER SEMICONDUCTOR TECHNICAL DATA • • • Supply Voltage 4.
5 to 5.
5 V Low Power 9mA Typical at VCC = 5.
0 V Operating Temperature Range of –40 to 85°C 8 1 FUNCTIONAL TABLE SW1 H H L L NOTE: SW2 H L H L Divide Ratio 64 128 128 256 D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) SW1 & SW2: H = VCC, L = Open.
8 1 MAXIMUM RATINGS Characteristic Power Supply Voltage, Pin 2 Operating Temperature Range Storage Temperature Range Maximum Output Current, Pin 4 NOTE: ESD data available upon request.
Symbol VCC TA Tstg IO Range –0.
5 to 7.
0 –40 to 85 –65 to 150 4.
0 Unit Vdc °C °C mA P SUFFIX PLASTIC PACKAGE CASE 626 PIN CONNECTIONS IN VCC SW1 OUT 1 2 3 4 8 7 6 5 IN NC SW2 Gnd (Top View) ORDERING INFORMATION Device MC12079D MC12079P Operating Temperature Range TA = – 40° to +85°C Package SO–8 Plastic © Motorola, Inc.
1997 Rev 3 MC12079 ELECTRICAL CHARACTERISTICS (VCC = 4.
5 to 5.
5 V; TA = –40 to 85°C, unless otherwise noted.
) Parameter Toggle Frequency (Sine Wave) Supply Current Output (Pin 2) Input Voltage Sensitivity Divide Ratio Control Input High (SW) Divide Ratio Control Input Low (SW) Output Voltage Swing (C...

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