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Manual Cypress Semiconductor Rambus XDR CY24271

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  • Cypress Semiconductor Rambus XDR CY24271 - page 1

    CY24272 Rambus ® XDR™ Clock Generator with Zero SDA Hold T ime Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document Number: 001-42414 Rev . ** Revised November 9, 2007 Features ■ Meets Rambus ® Extended Data Rate (XDR™) clocking requirements ■ 25 ps typical c ycle-to-cycle jitter ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 2

    CY24272 Document Number: 001-42414 Rev . ** Page 2 of 13 Pinout s T able 2. Pin Definition - 28 Pin TSSOP Pin No. Name IO Descriptio n 1 VDDP PWR 2.5V power supply fo r phased lock loop (PLL) 2 VSSP GND Ground 3 ISET I Set clock driver cur rent (external resistor) 4 VSS GND Ground 5 REFCLK I Reference clock input (connect to clock source) 6 REFCLKB ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 3

    CY24272 Document Number: 001-42414 Rev . ** Page 3 of 13 PLL Multiplier Ta b l e 3 shows the frequency multi pliers in the PLL, selectable by programming the SMBus registers MUL T0, MUL T1, and MUL T2. Default multiplier a t power up is 4 . T able 3. PLL Multipl ier Selection Input Clock Signal The XCG receives either a differ enti al (REFCLK/ REFC ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 4

    CY24272 Document Number: 001-42414 Rev . ** Page 4 of 13 Device ID and SMBus Device Address The device ID (ID0 and ID1) is a part of the SMBus device 8-bit address. The least significa nt bi t of the ad dress designates a write or read operation. Ta b l e 4 o n page 3 shows the addresses for four CY24272 devices on the same SMBus. SMBus Protocol Th ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 5

    CY24272 Document Number: 001-42414 Rev . ** Page 5 of 13 Note 5. RW = Read and W rite, RO = Read On ly , POD = Power on def ault . See T able 3 on page 3 f or PLL mul tip liers a nd T able 5 on p ag e 4 f or cl ock out put select ions. T able 6. Command Code 80h [5] Bit Register POD Ty p e Descriptio n 7 Reserved 0 R W Reserved (no internal functio ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 6

    CY24272 Document Number: 001-42414 Rev . ** Page 6 of 13 Figure 2. Differential and Single-Ended Clock Inpu t s Absolute Maximum Conditions Parameter Description Condition Min Max Unit V DD Clock Buffer Supply V oltage –0.5 4.6 V V DDC Core Supply V ol tage –0.5 4.6 V V DDP PLL Supply V oltage –0.5 4.6 V V IN Input V oltage (SCL and SDA) Rela ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 7

    CY24272 Document Number: 001-42414 Rev . ** Page 7 of 13 DC Operating Conditions Parameter Description Condition Min Max Unit V DDP Supply V oltage for PLL 2.5V ± 5% 2.375 2.625 V V DDC Supply V oltage for Core 2.5V ± 5% 2.375 2.625 V V DD Supply V oltage for Clock Buf fers 2.5V ± 5% 2.375 2.625 V V IHCLK Input High V oltage, REFCLK/REFCLKB 0.6 ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 8

    CY24272 Document Number: 001-42414 Rev . ** Page 8 of 13 AC Operating Conditions The AC operating cond itions follo w . [6] Parameter Description Condition Mi n Max Unit t CYCLE,IN REFCLK, REFCLKB input cycle time REFSEL = 0, /BYP ASS = High 9 1 1 ns REFSEL = 1, /BYP ASS = High 7 8 ns /BYP ASS = Low 4 – n s t JIT ,IN(cc) Input Cycle to Cycle Jitt ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 9

    CY24272 Document Number: 001-42414 Rev . ** Page 9 of 13 AC Electrical Specification The AC Electrical specifications follow . [6] Parameter Description Min Ty p Max Unit t CYCLE Clock Cycle time [19] 1.25 3.34 ns t JIT(cc) Jitter over 1-6 clock cycles at 400–635 MHz [20] –2 5 4 0 p s Jitter over 1-6 clock cycles at 638–667 MHz – 25 30 ps L ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 10

    CY24272 Document Number: 001-42414 Rev . ** Page 10 of 13 T est and Measurement Setup Figure 3. Clock Ou tput s Signal W aveforms A physical signal that appears at th e pins of a device is deemed valid or invalid depe nding on its voltage and timing relations with other signals. Input and ou tput voltage waveforms are defined as shown in Figure 4 o ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 11

    CY24272 Document Number: 001-42414 Rev . ** Page 1 1 of 13 Figure 4. Input and Output Waveforms Figure 5. Cros sing Point V olta ge Figure 6. Cycle-to-cycle Jitter Figure 7. Cyc le-to-cycle Duty-cycle Error V H t R t F 80% 20% V L V (t) Vx.nom CLK CLKB Vx+ Vx- CLK CLKB t CYCLE,i t CYCLE,i+1 t J = t CYCLE ,i - t CYCLE,i+1 over 10,000 consec utive cy ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 12

    CY24272 Document Number: 001-42414 Rev . ** Page 12 of 13 Package Drawing and Dimension Figure 8. 28-Pin Thin Shrunk Small Outline Package (4.40-mm Body) ZZ28 Ordering Information Part Number Package T ype Produc t Flow Pb-Free CY24272ZXC 28-pin TSSOP Commercial, 0°C to 70°C CY24272ZXCT 28-pin TSSOP – T ape and Reel Commercial, 0°C to 70°C PI ...

  • Cypress Semiconductor Rambus XDR CY24271 - page 13

    Document Number: 001-42414 Rev . ** Revi sed November 9, 2007 Page 13 of 13 PSoC Designer™, Programmable System-on-Chip ™, an d PS oC Exp re ss™ are tra demarks a nd PSo C® is a registe red t rade mark of Cypress S emi con ductor Corp. A ll o the r tr a dem a rks o r re gi ster e d trademar ks refere nced herei n are prop erty of the respe c ...

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Documents that we receive from a manufacturer of a Cypress Semiconductor Rambus XDR CY24271 can be divided into several groups. They are, among others:
- Cypress Semiconductor technical drawings
- Rambus XDR CY24271 manuals
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All of them are important, but the most important information from the point of view of use of the device are in the user manual Cypress Semiconductor Rambus XDR CY24271.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Cypress Semiconductor Rambus XDR CY24271, service manual, brief instructions and user manuals Cypress Semiconductor Rambus XDR CY24271. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Cypress Semiconductor Rambus XDR CY24271.

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A complete manual for the device Cypress Semiconductor Rambus XDR CY24271, how should it look like?
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A complete Cypress Semiconductor manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Cypress Semiconductor Rambus XDR CY24271 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Cypress Semiconductor Rambus XDR CY24271, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Cypress Semiconductor Rambus XDR CY24271, that we can find in the current document
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6. Contact detailsInformation about where to look for contact to the manufacturer/service of Cypress Semiconductor Rambus XDR CY24271 in a specific country, if it was not possible to solve the problem on our own.

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