CY25245OXC Cypress Semiconductor Corp, CY25245OXC Datasheet

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CY25245OXC

Manufacturer Part Number
CY25245OXC
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet

Specifications of CY25245OXC

Lead Free Status / RoHS Status
Compliant
Cypress Semiconductor Corporation
Document #: 38-07124 Rev. *B
Features
Notes:
1. Pins marked with ^ are internal pull-down resistors with weak 250 kΩ.
2. Pins marked with * are internal pull-up resistors with weak 80 kΩ.
• Cypress PREMIS™ SMARTSPREAD™ family offering
• Generates an electromagnetic interference (EMI)
• Selectable output frequency range
• Single 1.25%, 2.5%, 5%, or 10% down or center spread
• Integrated loop filter components
• Operates with a 3.3 or 5V supply
• Low power CMOS design
• Available in 20-pin Small Shrunk Outline Package
Simplified Block Diagram
optimized clocking signal at the output
output
(SSOP)
Oscillator or
Reference Input
XTAL
Input
SDATA
SCLK
X1
SDATA
SCLK
X2
X1
Serial Interface
Serial Interface
3.3V or 5.0V
3.3V or 5.0V
CY25245
CY25245
(EMI suppressed)
(EMI suppressed)
Spread Spectrum
Output
Output
Spread Spectrum
3901 North First Street
Frequency-multiplying, Peak-reducing
Key Specifications
Supply voltages: .......................................V
Frequency range:............................ 13 MHz ≤ F
Cycle-to-cycle jitter: ......................................... 250 ps (max)
Output duty cycle: ................................ 40/60% (worst case)
Pin Configuration
SDATA
SSON#^
MW0^
SCLK
AVDD
OR2*
OR1^
GND
X1
X2
San Jose
10
1
2
3
4
5
6
8
9
7
SSOP
,
CA 95134
[1, 2]
20
19
18
17
16
15
14
13
12
11
Revised February 2, 2005
GND
EMI Solution
REFOUT
VDD
GND
IR1*
IR2*
SSOUT
MW1*
VDD
MW2^
or V
DD
DD
408-943-2600
CY25245
= 3.3V ± 0.3V
in
= 5V ± 10%
≤ 166 MHz
[+] Feedback

Related parts for CY25245OXC

CY25245OXC Summary of contents

Page 1

... Serial Interface SCLK Notes: 1. Pins marked with ^ are internal pull-down resistors with weak 250 kΩ. 2. Pins marked with * are internal pull-up resistors with weak 80 kΩ. Cypress Semiconductor Corporation Document #: 38-07124 Rev. *B Frequency-multiplying, Peak-reducing Key Specifications Supply voltages: .......................................V Frequency range:............................ 13 MHz ≤ F Cycle-to-cycle jitter: ...

Page 2

Pin Definitions Pin Name Pin No. Pin Type SSOUT 15 O Output Modulated Frequency. Frequency modulated copy of the input clock (SSON# asserted). REFOUT 20 O Non-modulated Output. This pin provides a copy of the reference frequency. This output will ...

Page 3

Table 2. Modulation Width Selection Table EMI Reduction Modulation Setting MW2 Minimum EMI Control Suggested Setting Alternate Setting Maximum EMI reduction Overview The CY25245 product is one of a series of devices in the Cypress PREMIS family. The PREMIS family ...

Page 4

Spread Spectrum Frequency Timing Generator The device generates a clock that is frequency modulated in order to increase the bandwidth that it occupies. By increasing the bandwidth of the fundamental and its harmonics, the ampli- tudes of the radiated electromagnetic ...

Page 5

Serial Data Interface The CY25245 features a two-pin, serial data interface that can be used to configure internal register settings that control particular device functions. Upon power-up, the CY25245 initializes with default register settings, therefore the use of this serial ...

Page 6

Table 5. Data Bytes 0–7 Serial Configuration Map Affected Pin Bit(s) Pin No. Pin Name Data Byte 0 7 – – (Reserved) 6 – – (Reserved) 5 – – (Reserved) 4 – – (Reserved) 3 – – (Reserved) 2 – ...

Page 7

Table 5. Data Bytes 0–7 Serial Configuration Map (continued) Affected Pin Bit(s) Pin No. Pin Name 1 10 SSON# Spread Spectrum 0 4 MW0 LSB of Modulation Width Selection Data Byte MW2 MSB of Modulation Width Selection ...

Page 8

Absolute Maximum Ratings Stresses greater than those listed in this table may cause permanent damage to the device. These represent a stress rating only. Operation of the device at these or any other condi- Parameter Voltage on ...

Page 9

... Ordering Information Ordering Code CY25245PVC 20-pin Plastic SSOP CY25245PVCT 20-pin Plastic SSOP —Tape and Reel Lead-free CY25245OXC 20-pin Plastic SSOP CY25245OXCT 20-pin Plastic SSOP —Tape and Reel Layout Example +3.3V Supply FB µF 0.005 µ Ceramic Caps C1 = 10–22 µ 0.005 µ Vishay ILB1206 – ...

Page 10

... Document #: 38-07124 Rev. *B © Cypress Semiconductor Corporation, 2005. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress ...

Page 11

Document History Page Document Title: CY25245 Frequency-multiplying, Peak-reducing EMI Solution Document Number: 38-07124 Issue REV. ECN NO. Date ** 109865 11/13/01 *A 122550 01/08/03 *B 318273 See ECN Document #: 38-07124 Rev. *B Orig. of Change Description of Change IKA ...

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