- 您现在的位置：买卖IC网 > PDF目录361775 > W245-30 Clocks and Buffers PDF资料下载
参数资料
| 型号： | W245-30 |
| 英文描述： | Clocks and Buffers |
| 中文描述： | 时钟和缓冲器 |
| 文件页数： | 2/12页 |
| 文件大小： | 108K |
| 代理商： | W245-30 |
W245-30
Document #: 38-07229 Rev. *B
Page 2 of 12
Pin Description
Pin Name
Pin No.
Pin
Type
Pin Description
SSOUT
15
O
Output Modulated Frequency
: Frequency modulated copy of the input clock
(SSON# asserted).
REFOUT
20
O
Non-Modulated Output:
This pin provides a copy of the reference frequency.
This output will not have the Spread Spectrum feature enabled regardless of
the state of logic input SSON#.
X1
1
I
Crystal Connection or External Reference Frequency Input:
This pin has
dual functions. It may either be connected to an external crystal, or to an
external reference clock.
X2
2
I
Crystal Connection:
Input connection for an external crystal. If using an ex-
ternal reference, this pin must be left unconnected.
SSON#
10
I
Spread Spectrum Control (Active LOW):
Asserting this signal (active LOW)
turns the internal modulation waveform on. This pin has an internal pull-down
resistor.
MW0:2
4, 11, 14
I
Modulation Width Selection:
When Spread Spectrum feature is turned on,
these pins are used to select the amount of variation and peak EMI reduction
that is desired on the output signal. MW1:Down, MW1:Up, MW2:Down (See
Table 2
).
IR1:2
17, 16
I
Reference Frequency Selection:
Logic level provided at this input indicates
to the internal logic what range the reference frequency is in and determines
the factor by which the device multiplies the input frequency. Refer to
Table 3
.
These pins have internal pull-up resistors.
OR1:2
6, 9
I
Output Frequency Selection Bits:
These pins select the frequency operation
for the output. Refer to
Table 1
. OR2 pin have internal pull-up resistors. OR1
pin have internal pull-down resistors.
SCLK
7
I
Clock pin for SMBus circuitry.
SData
5
I/O
Data pin for SMBus Circuitry.
VDD
12, 19
P
Power Connection:
Connected to 3.3V or 5V power supply.
AVDD
3
P
Analog Power Connection:
Connected to 3.3V or 5V power supply.
GND
8, 13, 18
G
Ground Connection:
Connect all ground pins to the common ground plane.
相关PDF资料 |
PDF描述 |
|---|---|
| W2464-10 | x8 SRAM |
| W2464-10L | x8 SRAM |
| W2464-12 | x8 SRAM |
| W2464-12L | x8 SRAM |
| W2464AJ-20 | x8 SRAM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| W245-30H | 制造商:CYPRESS 制造商全称:Cypress Semiconductor 功能描述:Frequency Multiplying, Peak Reducing EMI Solution |
| W245-30HT | 制造商:CYPRESS 制造商全称:Cypress Semiconductor 功能描述:Frequency Multiplying, Peak Reducing EMI Solution |
| W245-4.80T2LR | 制造商:Calmark 功能描述: |
| W2456 | 制造商:Performance Tool 功能描述:Composite High Output LED Flashlight 制造商:PERFORMANCE TOOLS 功能描述:FLASHLIGHT LED COMPOSITE HIGH OUTPUT |
| W24-56KJI | 制造商:TT Electronics / Welwyn 功能描述:RESISTOR WW 14W 5% 56K |
发布紧急采购，3分钟左右您将得到回复。