NB2669ASNR2 datasheet(2/8 Pages) ONSEMI

Part #	NB2669ASNR2

Description	Low Power, Reduced EMI Clock Synthesizer

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Manufacturer	ONSEMI [ON Semiconductor]

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NB2669A

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Figure 1. Block Diagram

ModOUT

Frequency

Divider

Feedback

Divider

Phase

Detector

Loop

Filter

CLKIN

Modulation

VDD

VCO

Output

Divider

PLL

VSS

PD

Table 1. KEY SPECIFICATIONS

Description

Specification

Supply Voltages

VDD = 3.3 V / 2.5 V

Frequency Range

For 2.5 V Supply

For 3.3 V Supply

6 MHz < CLKIN < 12 MHz

6 MHz < CLKIN < 13 MHz

Cycle−to−Cycle Jitter

200 ps (maximum)

Output Duty Cycle

45/55% (worst case)

Modulation Rate Equation

FIN/256

Frequency Deviation

"1% @ 10 MHz

Figure 2. Pin Configuration

VDD

1

2

3

6

5

4

NC

CLKIN

ModOUT

NB2669A

VSS

PD

Table 2. PIN DESCRIPTION

Pin #

Pin Name

Type

Description

1

PD

I

Powerdown control pin. Pull low to enable Powerdown mode. Connect to VDD if not used.

2

NC

No connect.

3

CLKIN

I

External reference frequency input.

4

VDD

P

Power supply for the entire chip.

5

ModOUT

O

Spread spectrum clock output.

6

VSS

P

Ground connection.

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NB2669ASNR2 Datasheet(PDF) 2 Page - ON Semiconductor

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