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CY29772AIT Datasheet

  • CY29772AIT

  • 2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer

  • 12頁

  • CYPRESS

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CY29772
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Features
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Output frequency range: 8.33 MHz to 200 MHz
Input frequency range: 6.25 MHz to 125 MHz
2.5V or 3.3V operation
Split 2.5V/3.3V outputs
鹵2% max Output duty cycle variation
12 clock outputs: drive up to 24 clock lines
One feedback output
Three reference clock inputs: crystal or LVCMOS
300ps max output-output skew
Phase-locked loop (PLL) bypass mode
Spread Aware鈩?/div>
Output enable/disable
Pin-compatible with MPC9772 and MPC972
Industrial temperature range: 鈥?0擄C to +85擄C
52-pin 1.0-mm TQFP package
Description
The CY29772 is a low-voltage high-performance 200-MHz
PLL-based zero delay buffer designed for high-speed
clock-distribution applications.
The CY29772 features one on-chip crystal oscillator and two
LVCMOS reference clock inputs and provides 12 outputs parti-
tioned in three banks of four outputs each. Each bank divides
the VCO output per SEL(A:C) settings, see
Functional Table.
These dividers allow output to input ratios of 8:1, 6:1, 5:1, 4:1,
3:1, 8:3, 5:2, 2:1, 5:3, 3:2, 4:3, 5:4, 1:1, and 5:6. Each
LVCMOS-compatible output can drive 50鈩?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 1:24.
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 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
Frequency Table.
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.
Block Diagram
XIN
XOUT
VCO_SEL
PLL_EN
REF_SEL
D Q
TCLK0
TCLK1
TCLK_SEL
FB_IN
D Q
Sync
Frz
0
1
Phase
Detector
LPF
VCO
0
1
Sync
Frz
QA0
QA1
QA2
QA3
QB0
QB1
FB_SEL2
QB2
QB3
Pin Configuration
VCO_SEL
VDDQA
VDDQA
SELA0
SELA1
SELB0
SELB1
52 51 50 49 48 47 46 45 44 43 42 41 40
A V SS
MR#/OE
SCLK
SDA TA
FB_SEL2
PLL_EN
REF_SEL
TCLK_SEL
TCLK0
TCLK1
XIN
XOUT
A V DD
1
2
3
4
5
6
7
8
9
10
11
12
13
39
38
37
36
35
34
33
32
31
30
29
28
27
V SS
QB0
V DDQB
QB1
V SS
QB2
V DDQB
QB3
FB_IN
V SS
FB_OUT
V DD
FB_SEL0
VSS
QA0
C Y29772
QA1
VSS
QA2
QA3
MR#/OE
Power-On
Reset
SELA(0,1)
SELB(0,1)
SELC(0,1)
FB_SEL(0,1)
SCLK
SDATA
INV_CLK
Output Disable
Circuitry
12
2
2
2
2
/4, /6, /8, /10
Sync Pulse
Data Generator
D Q
/2
0
1
D Q
D Q
/4, /6, /8, /12
/4, /6, /8, /10
/2, /4, /6, /8
D Q
Sync
Frz
QC0
QC1
Sync
Frz
Sync
Frz
Sync
Frz
QC2
QC3
FB_OUT
14 15 16 17 18 19 20 21 22 23 24 25 26
INV_CLK
VSS
QC3
VDDQC
QC2
SELC1
SELC0
QC1
VDDQC
QC0
VSS
SYNC
FB_SEL1
SYNC
Cypress Semiconductor Corporation
Document #: 38-07572 Rev. **
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3901 North First Street
鈥?/div>
San Jose
,
CA 95134
鈥?/div>
408-943-2600
Revised August 27, 2003

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  • 英文版
    3.3V 125-MHz 8-Output Zero Delay Buffer
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  • 英文版
    2.5V or 3.3V 200-MHz 10-Output Zero Delay Buffer
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  • 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
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  • 英文版
    Clocks and Buffers
    ETC
  • 英文版
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    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
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