cy29775 Cypress Semiconductor Corporation., cy29775 Datasheet

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cy29775

Manufacturer Part Number
cy29775
Description
2.5v Or 3.3v, 200-mhz, 14 Output Zero Delay Buffer
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

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Cypress Semiconductor Corporation
Document #: 38-07480 Rev. *A
Block Diagram
Output frequency range: 8.3 MHz to 200 MHz
Input frequency range: 4.2 MHz to 125 MHz
2.5V or 3.3V operation
Split 2.5V/3.3V outputs
14 Clock outputs: Drive up to 28 clock lines
1 Feedback clock output
2 LVCMOS reference clock inputs
150 ps max output-output skew
PLL bypass mode
Spread Aware™
Output enable/disable
Industrial temperature range: –40°C to +85°C
52-Pin 1.0-mm TQFP package
T C L K _ S E L
V C O _ S E L (1 ,0 )
C LK _S T P #
F B _S E L (1,0)
P L L_ E N
M R #/O E
TC LK1
T C LK 0
F B _ IN
S E L A
S E LB
S E L C
198 Champion Court
2.5V or 3.3V, 200-MHz, 14 Output Zero
5 0 0M H z
2 0 0 -
P L L
Description
The CY29775 is a low-voltage high-performance 200-MHz
PLL-based zero delay buffer designed for high-speed clock
distribution applications.
The CY29775 features two reference clock inputs and provides
14 outputs partitioned in 3 banks of 5, 5, and 4 outputs. Bank A
and Bank B divide the VCO output by 4 or 8 while Bank C divides
by 8 or 12 per SEL(A:C) settings, see
B, and C) on page
of 6:1, 4:1, 3:1, 2:1, 3:2, 4:3, 1:1, and 2:3. Each LVCMOS
compatible output can drive 50: series or parallel terminated
transmission lines. For series terminated transmission lines,
each output can drive one or two traces giving the device an
effective fanout of 1:28.
The PLL is ensured stable given that the VCO is configured to
run between 200 MHz to 500 MHz. This allows a wide range of
output frequencies from 8.3 MHz to 200 MHz. For normal
operation, the external feedback input, FB_IN, is connected to
the feedback output, FB_OUT. The internal VCO is running at
multiples of the input reference clock set by the feedback divider,
see
When PLL_EN is LOW, PLL is bypassed and the reference clock
directly feeds the output dividers. This mode is fully static and the
minimum input clock frequency specification does not apply.
y 2
y4
Frequency Table on page
y 2 / y 4
y2 / y4
y4 / y6
y4 / y6 / y 8 / y 12
San Jose
S T O P
S T O P
S T O P
C LK
C LK
C LK
4. These dividers allow output to input ratios
,
CA 95134-1709
F B _O U T
4.
Q B 3
Q B 4
Q C 0
Q C 1
Q C 2
Q C 3
Q A 0
Q A 1
Q A 2
Q A 3
Q A 4
Q B 0
Q B 1
Q B 2
Revised December 19, 2007
Delay Buffer
Function Table (Bank A,
CY29775
408-943-2600
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cy29775 Summary of contents

Page 1

... The CY29775 is a low-voltage high-performance 200-MHz PLL-based zero delay buffer designed for high-speed clock distribution applications. The CY29775 features two reference clock inputs and provides 14 outputs partitioned in 3 banks and 4 outputs. Bank A and Bank B divide the VCO output while Bank C divides ...

Page 2

... LVCMOS Frequency select input, Bank (A:C). See Table 4 on page 4. LVCMOS Feedback dividers select inputs. See Table 5 on page 5. VDD 2.5V or 3.3V Power supply for bank A output clocks VDD 2.5V or 3.3V Power supply for bank B output clocks CY29775 V SS QB1 V DDQB QB2 V SS QB3 V DDQB QB4 ...

Page 3

... Document #: 38-07480 Rev. *A Type Description VDD 2.5V or 3.3V Power supply for bank C output clocks VDD 2.5V or 3.3V Power supply for feedback output clock VDD 2.5V or 3.3V Power supply for PLL VDD 2.5V or 3.3V Power supply for core and inputs Ground Analog Ground Ground Common Ground No Connection CY29775 [2,3] [2,3] [2,3] [2,3] Page [+] Feedback ...

Page 4

... QA(4:0) SELB QB(4: y16 CY29775 Input Frequency Range (AVDD = 2.5V) 25 MHz to 50 MHz 16.6 MHz to 33.3 MHz 12.5 MHz to 25 MHz 8.3 MHz to 16.6 MHz 6.25 MHz to 12.5 MHz 4.2 MHz to 8.3 MHz 50 MHz to 100 MHz 33.3 MHz to 66.6 MHz 25 MHz to 50 MHz 16.6 MHz to 33.3 MHz 1 TCLK1 VCOy4 (low input frequency range) VCO (high input frequency range) PLL enabled ...

Page 5

... SS Relative to V –0.3 SS – Functional 200 Ripple Frequency < 100 kHz – Non Functional –65 Functional –40 Functional – Functional – Functional – 2000 Manufacturing test CY29775 FB_OUT y8 y16 y12 y24 y16 y32 y24 y48 y12 Max Unit 5.5 V 3.465 0.3 ...

Page 6

... only VDD All V pins except A DD VDD Outputs loaded at 100 MHz Outputs loaded at 200 MHz . Alternatively, each output drives up to two 50: series terminated transmission lines. TT CY29775 Min Typ. Max Unit – – 0.8 V 2.0 – – – 0.55 V – ...

Page 7

... TCLK to FB_IN, does not include jitter Skew within Bank Banks at same frequency Banks at different frequency VCO_SEL = 0 VCO_SEL = 1 Same frequency Multiple frequencies . Parameters are guaranteed by characterization and are not 100% tested. TT CY29775 Min Typ. Max Unit 200 – 400 MHz 50 – 100 MHz 33 ...

Page 8

... Skew within Bank Banks at same voltage, same frequency Banks at same voltage, different frequency Banks at different voltage VCO_SEL = 0 VCO_SEL = 1 Same frequency Multiple frequencies IO at same V DD CY29775 Min Typ. Max Unit 200 – 500 MHz 50 – 125 MHz 33.3 – ...

Page 9

... ohm ohm ohm T VTT VDD VDD/2 GND VDD t(I GND Figure 4. Output Duty Cycle (DC) VDD VDD GND 100% Figure 5. Output-to-Output Skew, t sk(O) t SK(O) CY29775 ohm T VTT VDD/2 VDD VDD/2 GND VDD VDD/2 GND Page [+] Feedback ...

Page 10

... Package Drawing and Dimension Figure 6. 52-Lead Thin Plastic Quad Flat Pack ( 1.0 mm) A52B Document #: 38-07480 Rev. *A Package Type Product Flow Industrial, –40qC to +85qC Industrial, –40qC to 85qC Industrial, –40qC to +85qC Industrial, –40qC to 85qC CY29775 Status Obsolete Obsolete Active Active 51-85158-** Page [+] Feedback ...

Page 11

... Document History Page Document Title:CY29775 2.5V or 3.3V, 200-MHz, 14 Output Zero Delay Buffer Document #: 38-07480 Rev. ECN No. Issue Date Change ** 125955 04/29/03 *A 1875214 See ECN WWZ/AESA Added Pb-free part numbers and updated device status © Cypress Semiconductor Corporation, 2003-2007. 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 ...

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