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CY29947ACT Datasheet

  • CY29947ACT

  • 2.5V or 3.3V, 200-MHz, 1:9 Clock Distribution Buffer

  • 7頁

  • CYPRESS

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47
CY29947
2.5V or 3.3V, 200-MHz, 1:9 Clock Distribution Buffer
Features
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
2.5V or 3.3V operation
200-MHz clock support
LVCMOS-/LVTTL-compatible inputs
9 clock outputs: drive up to 18 clock lines
Synchronous Output Enable
Output three-state control
250 ps max. output-to-output skew
Pin compatible with MPC947, MPC9447
Available in Industrial and Commercial temp. range
32-pin TQFP package
Description
The CY29947 is a low-voltage 200-MHz clock distribution buff-
er with the capability to select one of two LVCMOS/LVTTL
compatible clock inputs. The two clock sources can be used
to provide for a test clock as well as the primary system clock.
All other control inputs are LVCMOS/LVTTL compatible. The 9
outputs are LVCMOS or LVTTL compatible and can drive 50鈩?/div>
series or parallel terminated transmission lines.For series ter-
minated transmission lines, each output can drive one or two
traces giving the device an effective fanout of 1:18. The out-
puts can also be three-stated via the three-state input TS#.
Low output-to-output skews make the CY29947 an ideal clock
distribution buffer for nested clock trees in the most demand-
ing of synchronous systems.
The CY29947 also provides a synchronous output enable in-
put for enabling or disabling the output clocks. Since this input
is internally synchronized to the input clock, potential output
glitching or runt pulse generation is eliminated.
Block Diagram
Pin Configuration
VDDC
VDDC
27
VSS
VSS
VSS
25
24
23
22
21
20
19
18
17
Q0
Q1
28
Q2
26
VDD
TCLK0
TCLK1
TCLK_SEL
SYNC_OE
TS#
0
1
VDDC
32
31
30
VSS
TCLK_SEL
TCLK0
TCLK1
SYNC_OE
TS#
VDD
VSS
1
2
3
4
5
6
7
8
29
VSS
Q3
VDDC
Q4
VSS
Q5
VDDC
VSS
9
Q0-Q8
CY29947
10
11
12
13
14
VDDC
15
Q6
16
VSS
9
VSS
VSS
Q8
Cypress Semiconductor Corporation
Document #: 38-07287 Rev. *C
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3901 North First Street
鈥?/div>
San Jose
VDDC
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CA 95134 鈥?408-943-2600
Revised December 22, 2002
Q7

CY29947ACT相關(guān)型號PDF文件下載

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  • 英文版
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  • 英文版
    2.5V or 3.3V, 200-MHz, 9-Output Clock Driver
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 9-Output Zero Delay Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 9-Output Zero Delay Buffer
    CYPRESS [C...
  • 英文版
    2.5V or 3.3V, 200-MHz, 11-Output Zero Delay Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 11-Output Zero Delay Buffer
    CYPRESS [C...
  • 英文版
    3.3V 125-MHz 8-Output Zero Delay Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V 200-MHz 10-Output Zero Delay Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
    CYPRESS [C...
  • 英文版
    2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
    CYPRESS [C...
  • 英文版
    Clocks and Buffers
    ETC
  • 英文版
    2.5V or 3.3V, 125-MHz, 14 Output Zero Delay Buffer
    CYPRESS
  • 英文版
    Clocks and Buffers
    ETC
  • 英文版
    2.5V or 3.3V, 200-MHz, 14 Output Zero Delay Buffer
    CYPRESS [C...
  • 英文版
    2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
    CYPRESS
  • 英文版
    2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
    CYPRESS [C...

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