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| 型号： | PI6C3991-IJ |
| 厂商： | Pericom Semiconductor Corp. |
| 英文描述： | 3.3V High-Speed, Low-Voltage Programmable Skew Clock Buffer SuperClock |
| 中文描述： | 3.3V的高速，低电压偏差可编程时钟缓冲器SuperClock |
| 文件页数： | 3/11页 |
| 文件大小： | 500K |
| 代理商： | PI6C3991-IJ |
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PI6C3991
3.3V High-Speed, Low-Voltage Programmable
3
PS8450B 04/09/01
t
0
U
t
0
U
t
0
U
t
0
U
t
0
U
t
0
U
t
0
t
0
U
t
0
U
t
0
U
t
0
U
t
0
U
t
0
U
FB Input
REF Input
3Fx
4Fx
(N/A)
HH
Invert
(N/A) LL/HH Divided
(N/A)
LM
LH
(N/A)
ML
(N/A)
MM
(N/A)
MH
(N/A)
HL
HM
–6t
U
–4t
U
–3t
U
–2t
U
–1t
U
0t
U
+1t
U
+2t
U
+3t
U
+4t
U
+6t
U
LL
LM
LH
ML
MM
MH
HL
HM
HH
(N/A)
1Fx
2Fx
Figure 1. Typical Outputs with FB Connected to a
Zero-Skew Output
(3)
Note:
3. FB connected to an output selected for "zero" skew
(ie., xF1 = xF0 = MID).
Block Diagram Description
Phase Frequency Detector and Filter
These two blocks accept input signals from the reference frequency
(REF) input and the feedback (FB) input and generate correction
information to control the frequency of the Voltage-Controlled
Oscillator (VCO). These blocks, along with the VCO, form a Phase-
Locked Loop (PLL) that tracks the incoming REF signal.
VCO and Time Unit Generator
The VCO accepts analog control inputs from the PLL filter block
and generates a frequency that is used by the time unit generator
to create discrete time units that are selected in the skew mix matrix.
The operational range of the VCO is determined by the FS control
pin. The time unit (t
U
) is determined by the operating frequency of
the device and the level of the FS pin as shown in Table 1.
Skew Select Matrix
The skew select matrix is comprised of four independent sections.
Each section has two low-skew, high-fanout drivers (xQ0, xQ1),
and two corresponding three-level function select (xF0, xF1)
inputs. Table 2 shows the nine possible output functions for each
section as determined by the function select inputs. All times are
measured with respect to the REF input assuming that the output
connected to the FB input has 0t
U
selected.
e
g
n
a
R
e
u
e
p
m
e
T
t
e
m
A
V
C
C
l
m
m
o
C
C
°
7
+
o
C
°
%
0
1
±
V
3
l
d
n
C
°
8
+
o
C
°
4
%
0
1
±
V
3
Test Mode
The TEST input is a three-level input. In normal system operation,
this pin is connected to ground, allowing the PI6C3991 to operate
as explained briefly above (for testing purposes, any of the three
level inputs can have a removable jumper to ground, or be tied LOW
through a 100 Ohm 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.
In contrast with normal operation (TEST tied LOW). All outputs
will function based only on the connection of their own function
select inputs (xF0 and xF1) and the waveform characteristics of
the REF input.
Storage Temperature ...................................... 65°C to +150°C
Ambient Temperature with
Power Applied.................................................55°C to +125°C
Supply Voltage to Ground Potential.................. 0.5V to +7.0V
DC Input Voltage ...............................................0.5V to +7.0V
Output Current into Outputs (LOW)............................... 64mA
Static Discharge Voltage ...............................................>2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current .........................................................>200mA
Maximum Ratings
Operating Range
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PDF描述 |
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| PI6C3991-5J | 3.3V High-Speed, Low-Voltage Programmable Skew Clock Buffer SuperClock |
| PI6C3991 | 3.3V High-Speed, Low-Voltage Programmable Skew Clock Buffer SuperClock |
| PI6C3991J | 3.3V High-Speed, Low-Voltage Programmable Skew Clock Buffer SuperClock |
| PI6C3Q991-2J | 3.3V Programmable Skew PLL Clock Driver |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PI6C3991J | 功能描述:IC PROG SKEW CLOCK DRIVER 32PLCC RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:SuperClock® 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| PI6C3991JE | 功能描述:锁相环 - PLL Programmable Skew Zero Delay RoHS:否 制造商:Silicon Labs 类型:PLL Clock Multiplier 电路数量:1 最大输入频率:710 MHz 最小输入频率:0.002 MHz 输出频率范围:0.002 MHz to 808 MHz 电源电压-最大:3.63 V 电源电压-最小:1.71 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:QFN-36 封装:Tray |
| PI6C3991JI | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Eight Distributed-Output Clock Driver |
| PI6C3Q991 | 制造商:PERICOM 制造商全称:Pericom Semiconductor Corporation 功能描述:3.3V Programmable Skew PLL Clock Driver |
| PI6C3Q991-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Eight Distributed-Output Clock Driver |
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