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Cypress CY7B9920 manual

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Table of contents for the manual

  • Page 1

    CY7B9910 CY7B9920 Low Skew Clock Buf fer Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document Number: 38-07135 Rev . *B Revised August 07, 2007 Features ■ All outputs skew <100 ps typical (250 max.) ■ 15 to 80 MHz output operation ■ Zero inpu t to out put delay ■ 50% duty cycle [...]

  • Page 2

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 2 of 1 1 Pin Configuration T est Mode The TEST input is a three level in put. In normal system operat ion, this pin is connected to groun d, allowing the CY7B9910 and CY7B9920 to ope rate as described i n Block Diagram Description . For testing purposes, any of the three level i nputs can h[...]

  • Page 3

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 3 of 1 1 Maximum Ratin gs Operating outside these boundaries may affect the performance and life of the d evice. These user guidelin es are not tested. S torage T emperature ................ ................ . –65 ° C to +150 ° C Ambient T emperature with Power Applied ............ ... [...]

  • Page 4

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 4 of 1 1 Electrical Characteristics Over the Operating Range CY7B9910 CY7B9920 Parameter Description T est Conditions Min Max Min Max Unit V OH Output HIGH V oltage V CC = Min, I OH = –16 mA 2.4 V V CC = Min, I OH =–40 mA V CC –0 . 7 5 V OL Output LOW V oltage V CC = Min, I OL = 46 mA[...]

  • Page 5

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 5 of 1 1 AC T est Loads and W aveforms Cap acita nce T ested initially and after any design or proces s changes that may affect these parameters. Parameter Descriptio n T est Conditions Max Unit C IN Input Capacitance T A = 25 ° C, f = 1 MHz, V CC = 5.0V 10 pF 7B9910–3 7B991 0–4 TTL AC[...]

  • Page 6

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 6 of 1 1 CY7B9910–5 CY7B9920–5 Parameter D escription Min Typ Max Min Typ Ma x Unit f NOM Operating Clock Frequency in MHz FS = LOW [1, 2] 15 30 15 30 MHz FS = MID [1, 2] 25 50 25 50 FS = HIGH [1, 2, 3] 40 80 40 80 [12] t RPWH REF Pulse Width HIGH 5.0 5.0 ns t RPWL REF Pulse Width LOW 5[...]

  • Page 7

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 7 of 1 1 Switching Characteristics Over the Operating R ange [1 1] (continued) CY7B9910–7 CY7B9920–7 Parameter Des cription Min Ty p Max Min Ty p Max Unit f NOM Operating Clock Frequency in MH z FS = LOW [1, 2] 15 30 15 30 MHz FS = MID [1, 2] 25 50 25 50 FS = HIGH 1, 2, 3] 40 80 40 80 [[...]

  • Page 8

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 8 of 1 1 AC Timing Diagrams Figure 1. AC Timing Diagrams Figure 2. Zero Skew and Zero Delay Clock Driver t ODCV t ODCV t REF REF FB Q OTHER Q t RPWH t RPWL t PD t SKEW t SKEW t JR SYSTEM CLOCK FB REF FS Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 TEST Z 0 LOAD LOAD LOAD LOAD REF Z 0 Z 0 Z 0 [+] Feedback [+] Fe[...]

  • Page 9

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 9 of 1 1 Operational M ode Descriptions Figure 2 shows the devi ce configured as a zero ske w clock buffer . In this mode the 7B9910/9920 is used as the basis for a low skew clock distribution tree. T he outputs are aligned and may each drive a te rminated transmis sion line to an in depend[...]

  • Page 10

    CY7B9910 CY7B9920 Document Number: 38-0713 5 Rev . *B Page 10 of 1 1 Ordering Information Accuracy (p s) Ordering Code Package T ype Operating Range 250 CY7B9910–2SC 24-Pb Small Outline IC Commercial CY7B9910–2SCT 24-Pb Small Outline IC - T ape and Reel Commercial CY7B9920–2SC [20] 24-Pb Small Outline IC Commercial 500 CY7B9910–5SC 24-Pb Sm[...]

  • Page 11

    Document Number: 38-07135 Rev . *B Revised August 07, 2007 Page 1 1 of 1 1 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. All 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 cti[...]