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MC145173 Datasheet

Part Name Description Manufacturer
MC145173 Dual-Band PLL Frequency Synthesizer with ADC and Frequency Counter Motorola
Motorola => Freescale Motorola
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Advance Information
Dual-Band PLL Frequency Synthesizer with ADC and Frequency Counter
CMOS

The MC145173 is a single–chip CMOS synthesizer with a four–wire serial interface for primary use in AM–FM broadcast receivers. The device also finds use in long–wave (LW) and short–wave (SW) receivers. Two inputs to a single high–speed N counter are provided, along with 2 phase detectors; one for a VHF loop up to 130 MHz, and another for an HF loop up to 40 MHz. The VHF
phase detector has a current source/sink output and both detectors feature linear transfer functions (no dead zones). An external crystal ties across on–chip circuitry which drives a completely–programmable reference counter. Thus, a broad range of tuning resolution is possible. The crystal oscillator is buffered and fed to an open–drain output which is active in the HF mode only.

• Operating Voltage Range: 4.5 to 5.5 V
• Maximum Operating Frequency: VHFin = 130 MHz @ 210 mV p–p HFin = 40 MHz @ 210 mV p–p
• Maximum Frequency of Reference Counter: 15 MHz
• Maximum Frequency of Frequency Counter: 20 MHz
• Maximum Supply Current: Operating Mode = 12 mA Standby Mode = 30 µA
• Approximate ADC Conversion Time: 360 µs
• Operating Temperature Range: – 40 to + 85°C
• R Counter Division Range: 1 and 5 to 16,383
• N Counter Division Range: 40 to 32,767
• Accommodates Downconversion or Upconversion Receiver Design for AM Broadcast Band
• Direct Interface to Motorola SPI Data Port
• Programmer’s Guide Included in Datasheet

 

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