參數(shù)資料
型號(hào)： AM486DX4
廠商： Advanced Micro Devices, Inc.
英文描述： High-Performance, Clock-Selectable, 3.3 V, 32-Bit Microprocessor(3.3V高性能時(shí)鐘可選32位微處理器)
中文描述： 高性能，時(shí)鐘可選，3.3伏，32位微處理器（3.3高性能時(shí)鐘可選32位微處理器）
文件頁數(shù)： 14/26頁
文件大?。?/td> 335K
代理商： AM486DX4
AMD
Am486DX4 Microprocessor
14
P R E L I M I N A R Y
ELECTRICAL DATA
The following sections describe recommended electri-
cal connections for the Am486DX4 microprocessor
and its electrical specifications.
Power and Grounding
Power Connections
The Am486DX4 CPU is implemented in 0.5 micron
CMOS 3-layer metal technology and has modest power
requirements. However, its high clock frequency output
buffers can cause power surges as multiple output buff-
ers drive new signal levels simultaneously. For clean,
on-chip power distribution at high frequency, 23 V
CC
and
28 V
SS
pins feed the Am486DX4 microprocessor.
Power and ground connections must be made to all ex-
ternal V
CC
and GND pins of the Am486DX4 micropro-
cessor. On the circuit board, all V
CC
pins must be
connected on a V
CC
plane. All V
SS
pins must likewise be
connected on a GND plane.
Power Decoupling Recommendations
Liberal decoupling capacitance should be placed near
the Am486DX4 microprocessor. The Am486DX4 mi-
croprocessor, driving its 32-bit parallel address and
data buses at high frequencies, can cause transient
power surges, particularly when driving large capaci-
tive loads.
Low inductance capacitors and interconnects are rec-
ommended for best high-frequency electrical perfor-
mance. Inductance can be reduced by shortening cir-
cuit board traces between the Am486DX4 CPU, and
decoupling capacitors as much as possible. Capacitors
specifically for PGA packages are also commercially
available.
System Clock Recommendations
The CLK input to the Am486DX4 processor should not
be driven until V
CC
has reached its normal operating
level (3.3 V). Once V
CC
has reached its normal operating
level, the Am486DX4 CPU can handle the clock fre-
quency for which it is specified and the oscillator/clock
driver should have locked onto its desired frequency.
Other Connection Recommendations
NC pins should always remain unconnected.
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
inputs should be connected to GND.
INC is electrically isolated and has no special require-
ments.
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM486DX4100C16BGI 制造商:AMD 功能描述:*
AM486DX5-133V16BHC 制造商:Advanced Micro Devices 功能描述:MPU AM486 RISC 32-Bit 0.35um 133MHz 5V 208-Pin SQFP
AM486DX5-133W16BHC 制造商:Advanced Micro Devices 功能描述:MPU AM486 RISC 32-Bit 0.35um 133MHz 5V 208-Pin SQFP
AM486DXPGA 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Am486DX PGA - Am486DX PGA Package Temperature Comparisons
AM486DXSQFP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Am486DX SQFP - Am486DX SQFP Package Temperature Comparisons
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