cy2546 Cypress Semiconductor Corporation., cy2546 Datasheet

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cy2546

Manufacturer Part Number
cy2546
Description
Quad Pll Programmable Clock Generator With Spread Spectrum
Manufacturer
Cypress Semiconductor Corporation.
Datasheet
Cypress Semiconductor Corporation
Document #: 001-12563 Rev. *A
Features
Block Diagram
• Four fully integrated phase-locked loops (PLLs)
• Input Frequency range:
• Wide operating output frequency range
• Programmable Spread Spectrum with Center and Down
• Two VDD core voltage options:
• Selectable output voltages:
• Frequency Select feature with option to select eight different
• Low jitter, high accuracy outputs
• Up to nine clock outputs
• Programmable output drive strength
• Glitch-free outputs while frequency switching
• 24-pin QFN package
• Commercial and Industrial temperature ranges
— External crystal: 8 to 48 MHz
— External reference: 8 to 166 MHz clock
— 3 to 166 MHz
Spread option and Lexmark modulation profile
— 2.5V, 3.0V, and 3.3V for CY2544
— 1.8V for CY2546
— 2.5V, 3.0V, and 3.3V for CY2544
— 1.8V for CY2546
frequencies
SSON
EXCLKIN
XIN
XOUT
FS0
FS1
FS2
OSC
Quad PLL Programmable Clock Generator with
Control
Logic
MUX
and
198 Champion Court
PRELIMINARY
PLL1
PLL2
PLL3
PLL4
(SS)
(SS)
Benefits
• Multiple high-performance PLLs allow synthesis of
• Nonvolatile programming for customized PLL frequencies,
• Two Spread Spectrum capable PLLs with Linear or Lexmark
• Spread Spectrum PLLs can be disabled or enabled
• PLLs can be programmed for system frequency margin
• Meets critical timing requirements in complex system
• Suitable for PC, consumer, and networking applications
• Ability to synthesize standard frequencies with ease
• Application compatibility in standard and low-power
unrelated frequencies
spread spectrum characteristics, drive strength, crystal load
capacitance, and output frequencies
profile for maximum EMI reduction
separately
tests
designs
systems
San Jose
4 of 6
Crossbar
Switch
,
CA 95134-1709
PD#/OE
Spread Spectrum
Strength
Output
Dividers
Control
Drive
and
Revised February 28, 2007
Bank
Bank
Bank
1
2
3
408-943-2600
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
CLK9
CY2546
CY2544
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cy2546 Summary of contents

Page 1

... Programmable Spread Spectrum with Center and Down Spread option and Lexmark modulation profile • Two VDD core voltage options: — 2.5V, 3.0V, and 3.3V for CY2544 — 1.8V for CY2546 • Selectable output voltages: — 2.5V, 3.0V, and 3.3V for CY2544 — 1.8V for CY2546 • Frequency Select feature with option to select eight different frequencies • ...

Page 2

... Power Supply for Output Bank3 (CLK7, CLK8, CLK9) output Output Programmable Output Clock Power Power Supply Ground for Output Bank 3 CY2544 CY2546 GND 17 CLK8 VDD_CLK_B3 16 CY2546 24LD QFN 15 CLK7/SSON VDD_CLK_B2 14 13 CLK6 Description Page [+] Feedback ...

Page 3

... Pin Description - CY2544 (2.5V, 3.0V or 3.3V VDD) Pin Number Name 19 GND 20 CLK9 21 EXCLKIN 22 VDD 23 XOUT 24 XIN Pin Description - CY2546 (1.8V VDD_CORE) Pin Number Name 1 GND 2 CLK1 3 VDD_CLK_B1 4 PD#/OE 5 VDD_CORE 6 CLK2 7 GND 8 CLK3/FS0 9 PD#/OE/FS1 10 CLK4/FS2 11 CLK5 12 GND 13 CLK6 14 VDD_CLK_B2 15 CLK7/SSON 16 VDD_CLK_B3 17 CLK8 18 GND 19 GND 20 CLK9 21 EXCLKIN ...

Page 4

... Document #: 001-12563 Rev. *A PRELIMINARY The input to the CY2544 and CY2546 is either a crystal or a clock signal. The input frequency range for crystals is 8 MHz to 48 MHz, and for clock signals is 8 MHz to 166 MHz. In addition, there is a separate input for a clock reference. ...

Page 5

... Output Driver Voltage for Bank 1, 2 and 3 Operating at 3.3V (CY2544) DD_CLK_BX V Output Driver Voltage for Bank 1, 2 and 3 Operating at 3.0V (CY2544) DD_CLK_BX V Output Driver Voltage for Bank 1, 2 and 3 Operating at 2.5V (CY2544) DD_CLK_BX V Output Driver Voltage for Bank 1, 2 and 3 Operating at 1.8V (CY2546) DD_CLK_BX T Commercial Ambient Temperature AC T Industrial Ambient Temperature AI C ...

Page 6

... Configuration dependent. See “Configuration Example for Jitter,” on page 6 Max Jitter (ps) on Max Jitter (ps) on Output 2 (27 MHz) Output 3 (166 MHz) 155 255 135 225 770 580 535 575 CY2544 CY2546 Min. Typ. Max. Unit 8 – 48 MHz 8 – 166 MHz 3 – 166 MHz 45 ...

Page 7

... Fmax Maximum Frequency R1(max) Maximum Motional Resistance (ESR) C0(max) Maximum Shunt Capacitance CL(max) Maximum Parallel Load Capacitance DL(max) Maximum Crystal Drive Level Document #: 001-12563 Rev. *A PRELIMINARY Description Description CY2544 CY2546 Range 1 Range 2 Range 3 Unit MHz MHz Ω 135 50 30 ...

Page 8

... Output Document #: 001-12563 Rev. *A PRELIMINARY Figure 1. Test and Measurement Setup 0.1 μF C DUT GND Figure 2. Duty Cycle Definition ( CY2544 CY2546 Outputs LOAD Page [+] Feedback ...

Page 9

... QFN - Tape & Reel CY2546Ixxx 24-pin QFN CY2546IxxxT 24-pin QFN -Tape & Reel CY2546FI 24-pin QFN CY2546FIT 24-pin QFN -Tape & Reel Note 2. xxx Indicates Factory Programmable are factory programmed configurations. For more details, contact your local Cypress FAE or Cypress Sales Representative. ...

Page 10

... Cypress against all charges. PRELIMINARY SIDE VIEW 0.05 C 1.00 MAX. 0.23±0.05 0.05 MAX. 0.80 MAX. 0.20 REF. 2.45 2.49 2.55 0.42±0.18 0°-12° (4X) C SEATING PLANE CY2544 CY2546 BOTTOM VIEW PIN1 ID 2.49 0. 0.45 SOLDERABLE EXPOSED PAD 0.30-0.50 0.50 2.45 2.55 51-85203-*A Page [+] Feedback ...

Page 11

... Document History Page Document Title: CY2544/CY2546 Quad PLL Programmable Clock Generator with Spread Spectrum Document Number: 001-12563 REV. ECN NO. Issue Date ** 690257 See ECN *A 790516 See ECN Document #: 001-12563 Rev. *A PRELIMINARY Orig. of Description of Change Change RGL New Data Sheet RGL Separated the Pin Configuration drawing into two to show the difference between CY2544 and CY2546 pin outs ...

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