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MC44827 - LOW-POWER PLL TUNING CIRCUIT

Datasheet Summary

Description

Pin 1 2 3 4 5 6 7 8 9 10,11,12,13 14 15 16 Symbol DA CL XTAL Amp In VTUN VCC2 VCC1 HF In Gnd B0 to B3 VCC3 Lock EN 3 wire bus data input 3 wire bus clock input Crystal oscillator (3.2 MHz or 4 MHz) Negative operational amplifier input and phase comparator output Operational amplifier

Features

  • as MC44817/17B but has improved sensitivity performance and reduced power dissipation. The low frequency preamplifier has been removed and the operational amplifier pull.
  • up resistor has been increased to 60 kΩ. The MC44827/27B are controlled via a 3.
  • wire bus. The MC44827/27B have the same functions as the MC44828 which is I2C bus controlled. The MC44827/27B and the MC44828 can be exchanged to allow conversion between 3.
  • wire bus and I2C bus control. The MC44827/27B are man.

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Datasheet Details

Part number MC44827
Manufacturer Motorola
File Size 157.46 KB
Description LOW-POWER PLL TUNING CIRCUIT
Datasheet download datasheet MC44827 Datasheet
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Full PDF Text Transcription

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Order this document by MC44827/D Low Power PLL Tuning Circuits for 3-Wire Bus The MC44827/27B are tuning circuits for TV and VCR tuner applications. They contain on one chip all the functions required for PLL control of a VCO. The integrated circuits also contain a high frequency prescaler and thus can handle frequencies up to 1.3 GHz. The MC44827 has programmable 512/1024 reference divider while the MC44827B has a fixed reference divider of 1024. The MC44827/27B offer the same features as MC44817/17B but has improved sensitivity performance and reduced power dissipation. The low frequency preamplifier has been removed and the operational amplifier pull–up resistor has been increased to 60 kΩ. The MC44827/27B are controlled via a 3–wire bus.
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