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參數(shù)資料
| 型號： | ASM2I9940LG-32LT |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLK BUFFER 2:18 250MHZ 32LQFP |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 類型： | 扇出緩沖器（分配） |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:18 |
| 差分 - 輸入:輸出： | 是/無 |
| 輸入： | LVCMOS，LVPECL |
| 輸出： | LVCMOS |
| 頻率 - 最大： | 250MHz |
| 電源電壓： | 2.375 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-LQFP |
| 供應(yīng)商設(shè)備封裝： | 32-LQFP（7x7） |
| 包裝： | 托盤 |
Semiconductor Components Industries, LLC, 2011
May, 2011 Rev. 0
1
Publication Order Number:
ASM2I9940L/D
ASM2I9940L
Low Voltage 1:18 Clock
Distribution Chip
Functional Description
The ASM2I9940L is a 1:18 low Voltage Clock distribution chip
with 2.5 V or 3.3 V LVCMOS output capabilities. The device features
the capability to select either a differential LVPECL or LVCMOS
compatible input. The 18 outputs are 2.5 V or 3.3 V LVCMOS
compatible and feature the drive strength to drive 50
W series or
parallel terminated transmission lines. With outputtooutput skews
of 150 pS, the ASM2I9940L is ideal as a clock distribution chip for the
most demanding of Synchronous systems. The 2.5 V outputs also
make the device ideal for supplying clocks for a high performance
microprocessor based design.
With low output impedance (
≈20 W), in both the HIGH and LOW
logic states, the output buffers of the ASM2I9940L are ideal for
driving series terminated transmission lines. With a 20
W output
impedance the ASM2I9940L has the capability of driving two series
terminated lines from each output. This gives the device an effective
fanout of 1:36.
The differential LVPECL inputs of the ASM2I9940L allow the
device to interface directly with a LVPECL fanout buffer to build very
wide clock fanout trees or to couple to a high frequency clock source.
The LVCMOS input provides a more standard interface for
applications requiring only a single clock distribution chip at
relatively low frequencies. In addition, the two clock sources can be
used to provide for a test clock interface as well as the primary system
clock. A logic HIGH on the LVCMOS_CLK_Sel pin will select the
LVCMOS level clock input. All inputs of the ASM2I9940L have
internal pullup/pulldown resistor, so they can be left open if unused.
The ASM2I9940L is a single or dual supply device. The device
power supply offers a high degree of flexibility. The device can
operate with a 3.3 V core and 3.3 V output, a 3.3 V core and 2.5 V
outputs as well as a 2.5 V core and 2.5 V outputs. The 32lead LQFP
Package was chosen to optimize performance, board space and cost of
the device. The 32lead LQFP Package has a 7 x 7 mm2 body size
with conservative 0.8 mm pin spacing.
Features
LVPECL or LVCMOS Clock Input
2.5 V LVCMOS Outputs for Intel Pentium II
Microprocessor Support
150 pS Maximum OutputtoOutput Skew
Maximum Output Frequency of 250 MHz
32 Lead LQFP Package
Dual or Single Supply Device:
Dual VCC Supply Voltage, 3.3 V Core and 2.5 V
Output
Single 3.3 V VCC Supply Voltage for 3.3 V Outputs
Single 2.5 V VCC Supply Voltage for 2.5 V I/O
Pin and Function compatible to MPC940L, MPC9109,
CY29940 and CY299401
These Devices are PbFree, Halogen Free/BFR Free
and are RoHS Compliant
LQFP32
CASE 873A
MARKING
DIAGRAM
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION
2I9940L
AWLYYWWG
2I9940L = Specific Device Code
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW
= Work Week
G
= PbFree Package
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ASM2I9940LG-32-LT | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:Low Voltage 1:18 Clock Distribution Chip |
| ASM2I9942C | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Voltage 1:18 Clock Distribution Chip |
| ASM2I9942C-32-ER | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Voltage 1:18 Clock Distribution Chip |
| ASM2I9942C-32-ET | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Voltage 1:18 Clock Distribution Chip |
| ASM2I9942C-32-LR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Voltage 1:18 Clock Distribution Chip |
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