MC145170-2 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

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MC145170-2

PLL Frequency Synthesizer with Serial Interface

Freescale Semiconductor 

Introduction

The device features fully programmable R and N counters, an amplifier at the fin pin, on-chip support of

an external crystal, a programmable reference output, and both single- and double-ended phase detectors

with linear transfer functions (no dead zones). A configuration (C) register allows the part to be configured

to meet various applications. A patented feature allows the C register to shut off unused outputs, thereby

minimizing noise and interference.

In order to reduce lock times and prevent erroneous data from being loaded into the counters, a patented

jam-load feature is included. Whenever a new divide ratio is loaded into the N register, both the N and R

counters are jam-loaded with their respective values and begin counting down together. The phase

detectors are also initialized during the jam load.

• Operating Voltage Range: 2.7 to 5.5 V

• Maximum Operating Frequency:

185 MHz @ Vin = 500 mVpp, 4.5 V Minimum Supply

100 MHz @ Vin = 500 mVpp, 3.0 V Minimum Supply

• Operating Supply Current:

0.6 mA @ 3.0 V, 30 MHz

1.5 mA @ 3.0 V, 100 MHz

3.0 mA @ 5.0 V, 50 MHz

5.8 mA @ 5.0 V, 185 MHz

• Operating Temperature Range: -40 to 85°C

• R Counter Division Range: 1 and 5 to 32,767

• N Counter Division Range: 40 to 65,535

• Programs through Standard Serial Peripheral Interface (SPI)

• See Application Notes AN1207/D and AN1671/D

• Contact Freescale for MC145170 control software.

Table 1. Comparision of the PLL Frequency Synthesizers

Parameter

Minimum Supply Voltage

Maximum Input Current, fin

Dynamic Characteristics, fin (Figure 26)

Power-On Reset Circuit

MC145170-2

2.7 V

150 µA

Unchanged

Improved

MC145170-1

2.5 V

120 µA

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MC145170-2 Technical Data, Rev. 5

2

Freescale Semiconductor

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