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參數(shù)資料
| 型號： | ASM5I9774A |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | Octal D-Type Flip-Flops With Clear 20-SO -40 to 85 |
| 中文描述： | 2.5V或3.3V，200兆赫，12路輸出零延遲緩沖器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 477K |
| 代理商： | ASM5I9774A |
June 2005
rev 0.3
ASM5I9774A
Alliance Semiconductor
2575, Augustine Drive
Santa Clara, CA
Tel: 408.855.4900
Fax: 408.855.4999
www.alsc.com
Notice: The information in this document is subject to change without notice.
2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer
Features
Output frequency range: 8.3MHz to 125MHz
Input frequency range: 4.2MHz to 62.5MHz
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
‘SpreadTrak’
Output enable/disable
Pin compatible with MPC9774 and CY29774AI.
Industrial temperature range: –40°C to +85°C
52Pin 1.0mm TQFP package
RoHS Compliance
Functional Description
The ASM5I9774A is a low-voltage high-performance
125MHz PLL-based zero delay buffer designed for high-
speed clock distribution applications.
The ASM5I9774A 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 Functional Table. These dividers allow output to input
ratios 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
terminated transmission lines, each output can drive one or
two traces giving the device an effective fanout of 1:28.
lines.
For
series
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 125 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
CLK
STOP
CLK
STOP
CLK
STOP
+2/+4
+2/+4
+4/+6
+4/+6/+8/+12
PLL
200-
500MHZ
VCO_SEL
QC3
QC2
QC1
QC0
QB3
QB4
QB2
QB1
QB0
QA3
QA4
QA2
QA1
QA0
FB_OUT
+2
+4
PLL_EN
TCLK_SEL
TCLK0
TCLK1
FB_IN
SELA
SELB
SELC
CLK_STP#
FB_SEL(1.0)
MR#/OE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ASM5I9774A-52-ER | Octal D-Type Flip-Flops With Clear 20-TSSOP -40 to 85 |
| ASM5I9774A-52-ET | Octal D-Type Flip-Flops With Clear 20-TSSOP -40 to 85 |
| ASM5I9775A | Octal D-Type Flip-Flops With Clear 20-TSSOP -40 to 85 |
| ASM5I9775A-52-ER | Octal D-Type Flip-Flops With Clear 20-TSSOP -40 to 85 |
| ASM5I9775A-52-ET | Octal D-Type Flip-Flops With Clear 20-TSSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM5I9774A-52-ER | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer |
| ASM5I9774A-52-ET | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer |
| ASM5I9774AG-52-ER | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer |
| ASM5I9774AG-52-ET | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V or 3.3V, 200-MHz, 12-Output Zero Delay Buffer |
| ASM5I9775A | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:2.5V or 3.3V, 200-MHz, 14 Output Zero Delay Buffer |
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