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參數(shù)資料
| 型號(hào)： | PI6C918AW |
| 廠商： | Pericom Semiconductor Corp. |
| 英文描述： | 3.3V PRECISION CLOCK GENERATOR |
| 中文描述： | 3.3V的精密時(shí)鐘發(fā)生器 |
| 文件頁數(shù)： | 1/3頁 |
| 文件大小： | 55K |
| 代理商： | PI6C918AW |
1
PS7038B 09/08/97
Pin Name Pin # I/O Description
S0
6
S1
7
X1
2
X2
3
CLK
5
OE
1
I
I
Select 0, internal pull-up
Select 1, internal pull-up
Crystal or clock input, 8 to 23 MHz
Crystal connection or no connect
Clock output
OE = 1 Enable CLK output
OE = 0 Disable CLK output
C
C
O
I
3.3V Precision Clock Generator
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PI6C918/919
Features
No external capacitors (919 only)
Excellent signal quality
Very low jitter
Precise frequencies
Minimal undershoot, ringback or overshoot
Nearly perfect 50% duty cycle
Four selectable clock frequencies
Operates at Vcc = 3.3V
Output may be disabled to save power
Small 150-mil wide SOIC -8 (W8) package
saves board area
Pin Configuration
Pin Description
Product Speed Grades
Max CLK
Output Freq.
80 MHz
100 MHz
120 MHz
Max VCO
Frequency
160 MHz
200 MHz
240 MHz
Part No.
PI6C918/919
PI6C918A/919A
PI6C918B/919B
Output CLK Frequency Selection
Vcc
1
OE
8
S1
2
X1
7
S0
3
X2
6
CLK
4
GND
5
8-PIN
W8
Note:
1.I = Input, O = Output, C = Crystal
Description
The PI6C918 and PI6C919 are high-precision, low-voltage
general-purpose clock generators that reach a maximum output
frequency of 120 MHz. These devices use an external low-cost
crystal to generate very accurate and stable system clocks.
These frequency synthesizers include a crystal oscillator, a
programmable PLL and an output buffer. Any one of four
different output frequencies can be selected via two select pins
(S0, S1). The frequency multipliers are: 2, 4, 5, and 7.
The PI6C919 has on-chip capacitors, eliminating the need for
external capacitors at the X1, X2 pins. This reduces overall parts
count and board area, and increases reliability.
The OE (output enable) pin may be pulled down to disable the
output buffer and save system power.
The small surface-mount SOIC-8 package is ideal for compact
portable equipment applications.
Notes:
1. Indicates popular target frequencies.
2. The ratio of N/M may be changed by mask option.
n
o
S
,
S
0
S
M
/
N
)
k
1
)
X
c
g
o
C
0
n
H
M
z
k
6
1
)
X
c
o
g
z
C
n
M
H
k
2
)
X
c
g
o
C
0
n
H
M
z
k
1
2
)
X
c
o
g
z
C
n
M
H
0
0
2
–
3
3
)
0
4
2
4
1
0
4
0
4
)
6
6
)
0
8
)
4
8
0
1
5
0
5
)
3
8
0
0
1
)
5
1
1
1
1
7
0
7
)
6
1
1
–
–
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PI6C918 | 3.3V PRECISION CLOCK GENERATOR |
| PI6C919 | 3.3V PRECISION CLOCK GENERATOR |
| PI6C918BW | 3.3V PRECISION CLOCK GENERATOR |
| PI6C918W | 3.3V PRECISION CLOCK GENERATOR |
| PI6C919AW | 3.3V PRECISION CLOCK GENERATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PI6C918AW9 | 制造商:Pericom Semiconductor Corporation 功能描述: |
| PI6C918BW | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:3.3V PRECISION CLOCK GENERATOR |
| PI6C918BW9 | 制造商:Pericom Semiconductor Corporation 功能描述: |
| PI6C918W | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:3.3V PRECISION CLOCK GENERATOR |
| PI6C919 | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:3.3V PRECISION CLOCK GENERATOR |
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