參數(shù)資料
型號(hào)： 20736
英文描述： Enhanced Am486DX Family Data Sheet? 1.87MB (PDF)
中文描述： 增強(qiáng)Am486DX系列數(shù)據(jù)手冊(cè)？ 1.87MB（PDF格式）
文件頁(yè)數(shù)： 56/66頁(yè)
文件大?。?/td> 1923K
代理商： 20736
56
Enhanced Am486DX Microprocessor Family
P R E L I M I N A R Y
10
The following sections describe recommended electri-
cal connections and electrical specifications for the En-
hanced Am486DX microprocessors.
ELECTRICAL DATA
10.1 Power and Grounding
10.1.1 Power Connections
With 16 Kbyte of cache, the Enhanced Am486DX mi-
croprocessors have modest power requirements. How-
ever, the high clock frequency output buffers can cause
power surges as multiple output buffers drive new signal
levels simultaneously. For clean, on-chip power distri-
bution at high frequency, 23 V
CC
pins
and 28 V
SS
pins
feed the microprocessor in the 168-pin PGA package.
The 208-pin SQFP package includes 53 V
CC
pins and
38 V
SS
pins.
Power and ground connections must be made to all
external V
CC
and V
SS
pins of the microprocessors. On a
circuit board, all V
CC
pins must connect to a V
CC
plane.
Likewise, all V
SS
pins must connect to a common GND
plane.
The Enhanced Am486DX microprocessors require only
3.3 V as input power. Unlike other 3-V processors, the
Enhanced Am486DX microprocessors do not require a
V
CC5
input of 5 V to indicate the presence of 5-V I/O
devices on the system motherboard. For socket com-
patibility, this pin is INC, allowing the Enhanced
Am486DX microprocessors to operate in 3-V sockets
in systems that use 5-V I/O.
10.1.2 Power Decoupling Recommendations
Liberal decoupling capacitance should be placed near
the microprocessor. The microprocessor, driving its 32-
bit parallel address and data buses at high frequencies,
can cause transient power surges, particularly when
driving large capacitive loads.
Low inductance capacitors and interconnects are rec-
ommended for best high-frequency electrical perfor-
mance. Inductance can be reduced by shortening
circuit- board traces between the microprocessor and
the decoupling capacitors. Capacitors designed specif-
ically for use with PGA packages are commercially avail-
able.
10.1.3 Other Connection Recommendations
For reliable operation, always connect unused inputs to
an appropriate signal level. Active Low inputs should be
connected to V
CC
through a pull-up resistor. Pull-ups in
the range of 20 K
are recommended. Active High in-
puts should be connected to GND.
相關(guān)PDF資料
PDF描述
2075 data delay devices
208-501-21-38 LED TELEFONSOCKEL T6.8 12V ROT
208-521-21-38 LED TELEFONSOCKEL T6.8 12V GELB
208-532-21-38 LED TELEFONSOCKEL T6.8 12V GRUEN
208-930-21-38 LED TELEFONSOCKEL T6.8 12V BLAU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
207360-1 功能描述:管腳和插座連接器 3P PLUG HOUSING RoHS:否 制造商:Molex 系列:1561 產(chǎn)品類型:Contacts 觸點(diǎn)類型:Socket (Female) 節(jié)距: 位置/觸點(diǎn)數(shù)量: 排數(shù): 安裝風(fēng)格:Wire 端接類型:Crimp 外殼材料: 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Tin 電壓額定值: 電流額定值:
20-7360-10 功能描述:IC 與器件插座 ELEVATOR STRIP LINE 20 PINS RoHS:否 制造商:Molex 產(chǎn)品:LGA Sockets 節(jié)距:1.02 mm 排數(shù): 位置/觸點(diǎn)數(shù)量:2011 觸點(diǎn)電鍍:Gold 安裝風(fēng)格:SMD/SMT 端接類型:Solder 插座/封裝類型:LGA 2011 工作溫度范圍:- 40 C to + 100 C
207363-000 制造商:TE Connectivity 功能描述:MTC50-YH2-004
207365-1 功能描述:管腳和插座連接器 PIN HDR ASSY METRIMATE 3P RoHS:否 制造商:Molex 系列:1561 產(chǎn)品類型:Contacts 觸點(diǎn)類型:Socket (Female) 節(jié)距: 位置/觸點(diǎn)數(shù)量: 排數(shù): 安裝風(fēng)格:Wire 端接類型:Crimp 外殼材料: 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Tin 電壓額定值: 電流額定值:
207365-3 功能描述:管腳和插座連接器 PIN HEADER 3P RoHS:否 制造商:Molex 系列:1561 產(chǎn)品類型:Contacts 觸點(diǎn)類型:Socket (Female) 節(jié)距: 位置/觸點(diǎn)數(shù)量: 排數(shù): 安裝風(fēng)格:Wire 端接類型:Crimp 外殼材料: 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Tin 電壓額定值: 電流額定值:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*