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參數資料
| 型號： | CY7B9910 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | Low Skew Clock Buffer(低斜率時鐘緩沖器) |
| 中文描述： | 低偏移時鐘緩沖器（低斜率時鐘緩沖器） |
| 文件頁數： | 1/8頁 |
| 文件大小： | 164K |
| 代理商： | CY7B9910 |
Low Skew
Clock Buffer
CY7B9910
CY7B9920
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
November 1994 - Revised July 7, 1997
Features
All outputs skew <100 ps typical (250 max.)
15- to 80-MHz output operation
Zero input to output delay
50% duty-cycle outputs
Outputs drive 50
terminated lines
Low operating current
24-pin SOIC package
Jitter: <200 ps peak to peak, <25 ps RMS
Compatible with Pentium-based processors
Functional Description
The CY7B9910 and CY7B9920 Low Skew Clock Buffers offer
low-skew system clock distribution. These multiple-output
clock drivers optimize the timing of high-performance comput-
er systems. Eight individual drivers can each drive terminated
transmission lines with impedances as low as 50
while deliv-
ering minimal and specified output skews and full-swing logic
levels (CY7B9910 TTL or CY7B9920 CMOS).
The completely integrated PLL allows “zero delay” capability.
External divide capability, combined with the internal PLL, allows
distribution of a low-frequency clock that can be multiplied by virtu-
ally any factor at the clock destination. This facility minimizes clock
distribution difficulty while allowing maximum system clock speed
and flexibility.
Block Diagram Description
Phase Frequency Detector and Filter
These two blocks accept inputs from the reference frequency
(REF) input and the feedback (FB) input and generate correc-
tion information to control the frequency of the Voltage-Con-
trolled Oscillator (VCO). These blocks, along with the VCO,
form a Phase-Locked Loop (PLL) that tracks the incoming
REF signal.
VCO
The VCO accepts analog control inputs from the PLL filter
block and generates a frequency. The operational range of the
VCO is determined by the FS control pin.
Test Mode
The TEST input is a three-level input. In normal system oper-
ation, this pin is connected to ground, allowing the
CY7B9910/CY7B9920 to operate as explained above. (For
testing purposes, any of the three-level inputs can have a re-
movable jumper to ground, or be tied LOW through a 100
resistor. This will allow an external tester to change the state of
these pins.)
If the TEST input is forced to its MID or HIGH state, the device
will operate with its internal phase-locked loop disconnected,
and input levels supplied to REF will directly control all outputs.
Relative output to output functions are the same as in normal
mode.
Pentium is a trademark of Intel Corporation.
Logic Block Diagram
Pin Configuration
7B9910–1
7B9910–2
TEST
FB
REF
Voltage
Controlled
Oscillator
FS
Q0
FILTER
PHASE
FREQ
DET
Q4
V
CCN
FB
Q2
Q3
REF
V
CCQ
FS
NC
V
CCQ
V
CCN
Q0
Q1
GND
V
CCN
GND
TEST
NC
GND
V
CCN
Q7
Q6
GND
Q5
SOIC
Top View
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
20
24
23
22
21
13
14
7B9910
7B9920
Q1
Q2
Q3
Q4
Q5
Q6
Q7
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| CY7B9911-5JCT | Programmable Skew Clock Buffer |
| CY7B9911-7JC | Programmable Skew Clock Buffer (PSCB) |
| CY7B9911V-5JCT | High Speed Low Voltage Programmable Skew Clock Buffer |
| CY7B9911V-5JXC | High Speed Low Voltage Programmable Skew Clock Buffer |
| CY7B9911V-5JXCT | High Speed Low Voltage Programmable Skew Clock Buffer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CY7B9910_07 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Low Skew Clock Buffer |
| CY7B9910-2SC | 功能描述:IC CLK BUFF SKEW 8OUT 24SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，PLL，頻率合成器 系列:- 產品變化通告:Product Discontinuation 04/May/2011 標準包裝:96 系列:- 類型:時鐘倍頻器，零延遲緩沖器 PLL:帶旁路 輸入:LVTTL 輸出:LVTTL 電路數:1 比率 - 輸入:輸出:1:8 差分 - 輸入:輸出:無/無 頻率 - 最大:133.3MHz 除法器/乘法器:是/無 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:管件 其它名稱:23S08-5HPGG |
| CY7B9910-2SCT | 制造商:Cypress Semiconductor 功能描述:Zero Delay PLL Clock Buffer Single 15MHz to 80MHz 24-Pin SOIC T/R |
| CY7B9910-2SXC | 功能描述:鎖相環 - PLL 5V 80MHz 8 TTL COM Not Programable RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| CY7B9910-2SXCT | 功能描述:鎖相環 - PLL 5V 80MHz 8 TTL COM Not Programable RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
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