參數(shù)資料
型號: Alpha 21164
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: Alpha Microprocessor(64位微處理器)
中文描述: 阿爾法微處理器(64位微處理器)
文件頁數(shù): 79/115頁
文件大?。?/td> 846K
代理商: ALPHA 21164
Electrical Data
79
DC Characteristics
Caution:
Stress beyond the absolute maximum rating can cause permanent dam-
age to the 21164. Exposure to absolute maximum rating conditions for
extended periods of time can affect the 21164 reliability.
11.2 DC Characteristics
The 21164 is designed to run in a 3.3-V CMOS/TTL environment. The 21164 is
tested and characterized in a CMOS environment.
11.2.1 Power Supply
The
Vss
pins are connected to 0.0 V, the
Vddi
pins are connected to 2.5 V ±0.1 V,
and the
Vdd
pins are connected to 3.3 V ±5%.
11.2.2 Input Signal Pins
Nearly all input signals are ordinary CMOS inputs with standard TTL levels (see
Table 25). (See Section 11.3.1 for a description of an exception—
osc_clk_in_h,l
.)
After power has been applied, input and bidirectional pins can be driven to a maxi-
mum dc voltage of
Vclamp
at a maximum current of
Iclamp
without harming the
21164. Refer to Table 25 for
Vclamp
and
Iclamp
values. Inputs greater than
Vclamp
will be clamped to
Vclamp
provided that the current does not exceed
Iclamp
. The 21164 may be damaged if the voltage exceeds
Vclamp
or the current
exceeds
Iclamp
.
11.2.3 Output Signal Pins
Output pins are ordinary 3.3-V CMOS outputs. Although output signals are rail-to-
rail, timing is specified to
Vdd
/2.
Note:
The 21164 microprocessor chips do not have an onchip resistor for an
output driver. Earlier versions of the 21164 have a 30-
(typical) onchip
resistor for an output driver.
Table 24 Operating Voltages
Nominal
Maximum
Minimum
Vdd
Vddi
Vdd
Vddi
Vdd
Vddi
3.3 V
2.5 V
3.46 V
2.6 V
3.13 V
2.4 V
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