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PDF CY2546 Data sheet ( Hoja de datos )
| Número de pieza | CY2546 | |
| Descripción | Quad PLL Programmable Clock Generator | |
| Fabricantes | Cypress Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CY2546 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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CY2544
CY2546
CY2548
Quad PLL Programmable Clock Generator
with Spread Spectrum
Quad PLL Programmable Clock Generator with Spread Spectrum
Features
■ Four fully integrated phase locked loops (PLLs)
■ Input frequency range
❐ External crystal: 8 to 48 MHz for CY2544 and CY2546
❐ External reference: 8 to 166 MHz clock
■ Reference clock input voltage range
❐ 2.5 V, 3.0 V, and 3.3 V for CY2548
❐ 1.8 V for CY2544 and CY2546
■ Wide operating output frequency range
❐ 3 to 166 MHz
■ Programmable spread spectrum with center and down spread
option and Lexmark and Linear modulation profiles
■ VDD supply voltage options:
❐ 2.5 V, 3.0 V, and 3.3 V for CY2544 and CY2548
❐ 1.8 V for CY2546
■ Selectable output clock voltages:
❐ 2.5 V, 3.0 V, and 3.3 V for CY2544 and CY2548
❐ 1.8 V for CY2546
■ Frequency select feature with option to select eight different
frequencies over nine clock outputs
■ Power down, output enable, and SS ON/OFF controls
■ Low jitter, high accuracy outputs
Logic Block Diagram
■ Ability to synthesize nonstandard frequencies with Fractional-N
capability
■ Up to nine clock outputs with programmable drive strength
■ Glitch free outputs while frequency switching
■ 24-pin QFN package
■ Commercial and Industrial temperature ranges
Benefits
■ Multiple high performance PLLs allow synthesis of unrelated
frequencies
■ Nonvolatile programming for personalization of PLL
frequencies, spread spectrum characteristics, drive strength,
crystal load capacitance, and output frequencies
■ Application specific programmable EMI reduction using spread
spectrum for clocks
■ Programmable PLLs for system frequency margin tests
■ Meets critical timing requirements in complex system designs
■ Suitability for PC, consumer, portable, and networking
applications
■ Capable of Zero PPM frequency synthesis error
■ Uninterrupted system operation during clock frequency switch
■ Application compatibility in standard and low power systems
■ For a complete list of related documentation, click here.
CLKIN
XIN/
EXCLKIN
XOUT
OSC
FS 0
FS 1
FS 2
MUX
and
Control
Logic
PLL1
PLL2
PLL3
(SS)
Crossbar
Switch
Bank
1
Output
Dividers
and Bank
2
Drive
Strength
Control Bank
3
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
CLK9
SSON
PLL4
(SS)
PD#/OE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-12563 Rev. *I
• San Jose, CA 95134-1709 • 408-943-2600
Revised December 3, 2014
1 page  
CY2544
CY2546
CY2548
Pin Definitions
CY2546 (VDD = 1.8 V Supply)
Pin Number
1
2
3
4
5
6
7
8
Name
GND
CLK1
VDD_CLK_B1
PD#/OE
VDD
CLK2
GND
CLK3/FS0
9 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 CLKIN
22 VDD
23 XOUT
24 XIN/EXCLKIN
I/O Description
Power Power supply ground
Output Programmable clock output. Output voltage depends on VDD_CLK_B1 voltage
Power Power supply for bank1, (CLK1, CLK2, CLK3) Outputs. 1.8 V
Input Multifunction programmable pin. Output enable or power down mode
Power Power supply. 1.8 V
Output Programmable clock output. Output voltage depends on VDD_CLK_B1 voltage
Power Power supply ground
Output/Input Multifunction programmable pin. Programmable clock output or frequency select
input pin. Output voltage of CLK3 depends on VDD_CLK_B1 voltage
Input Multifunction programmable pin. Output enable or frequency select pin
Output/Input Multifunction programmable pin. Programmable clock output or frequency select
input pin. Output voltage of CLK4 depends on VDD_CLK_B2 voltage
Output Programmable clock output. Output voltage depends on VDD_CLK_B2 voltage
Power Power supply ground
Output Programmable clock output. Output voltage depends on VDD_CLK_B2 voltage
Power Power supply for bank2, (CLK4, CLK5, CLK6) Outputs. 1.8 V
Output/input Multifunction programmable pin. Programmable clock output or spread spectrum
ON/OFF control input pin. Output voltage of CLK7 depends on VDD_CLK_B3
voltage
Power Power supply for bank3, (CLK7, CLK8, CLK9) Outputs. 1.8 V
Output Programmable clock output. Output voltage depends on VDD_CLK_B3 voltage
Power Power supply ground
Power Power supply ground
Output Programmable clock output. Output voltage depends on VDD_CLK_B3 voltage
Input External 1.8 V low voltage reference clock input
Power Power supply. 1.8 V
Output Crystal output
Input Crystal input or 1.8 V external clock input
General Description
Four Configurable PLLs
The CY2544, CY2548 and CY2546 have four programmable
PLLs that can be used to generate output frequencies ranging
from 3 to 166 MHz. The advantage of having four PLLs is that a
single device generates up to four independent frequencies from
a single crystal.
Input Reference Clocks
The input to the CY2544, CY2548 and CY2546 can be either a
crystal or a clock signal. The input frequency range for crystal
(XIN) is 8 MHz to 48 MHz and that for external reference clock
(EXCLKIN) is 8 MHz to 166 MHz. The voltage range for the
reference clock input of CY2548 is 2.5 V/3.0 V/3.3 V while that
for CY2544 and CY2546 is 1.8 V. This gives user an option for
this device to be compatible for different input clock voltage
levels in the system.
There is provision for a secondary reference clock input, CLKIN
with applied frequency range of 8 MHz to 166 MHz. When CLKIN
signal at pin 21 is used as a reference input to the PLL, a valid
signal at EXCLKIN (as specified in the AC and DC Electrical
Specification table) must be present for the devices to operate
properly.
Multiple Power Supplies
These devices are designed to operate at internal supply voltage
of 1.8 V. In the case of the high voltage part (CY2544/CY2548),
an internal regulator is used to generate 1.8 V from the
2.5 V/3.0 V/3.3 V VDD supply voltage at pin 22. For the low
Document Number: 001-12563 Rev. *I
Page 5 of 17
5 Page 
CY2544
CY2546
CY2548
Ordering Information
Part Number
Type [7]
Pb-free
CY2544C
Field Programmable
CY2544CT Field Programmable
CY2548C
Field Programmable
CY2548CT Field Programmable
CY2546C
Field Programmable
CY2546CT Field Programmable
CY2544I
Field Programmable
CY2544IT
Field Programmable
CY2548I
Field Programmable
CY2548IT
Field Programmable
CY2546I
Field Programmable
CY2546IT
Field Programmable
Programmer
CY3675-CLKMAKER1
CY3675-QFN24A
Package
Supply Voltage
Operating Range
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0V or 3.3 V
2.5 V, 3.0V or 3.3 V
2.5 V, 3.0V or 3.3 V
1.8 V
1.8 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
1.8 V
1.8 V
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Programming kit
Socket adapter board, for programming CY2544 and CY2548[8]
Some product offerings are factory programmed customer specific devices with customized part numbers.
The Possible Configurations table shows the available device types, but not complete part numbers. Contact your local Cypress FAE
of Sales Representative for more information.
Possible Configurations
Part Number [9]
Type [7]
Pb-free
CY2544Cxxx
Factory Programmed
CY2544CxxxT Factory Programmed
CY2548Cxxx
Factory Programmed
CY2548CxxxT Factory Programmed
CY2546Cxxx
Factory Programmed
CY2546CxxxT Factory Programmed
CY2544Ixxx
Factory Programmed
CY2544IxxxT Factory Programmed
CY2548Ixxx
Factory Programmed
CY2548IxxxT Factory Programmed
CY2546Ixxx
Factory Programmed
CY2546IxxxT Factory Programmed
Package
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN – Tape and Reel
24-pin QFN
24-pin QFN - Tape and Reel
Supply Voltage
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
1.8 V
1.8 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
2.5 V, 3.0 V or 3.3 V
1.8 V
1.8 V
Operating Range
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Commercial, 0 °C to 70 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Industrial, -40 °C to +85 °C
Notes
7. Field Programmable devices are shipped unprogrammed, and must be programmed before being installed on a board. Factory Programmed devices are shipped
fully configured and ready to install on a board.
8. The CY3675-QFN24A cannot be used to program the CY2546.
9. “xxx” is a variable that denotes a specific device configuration. For more details, contact your local Cypress FAE or Cypress Sales Representative.
Document Number: 001-12563 Rev. *I
Page 11 of 17
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet CY2546.PDF ] | |
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