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TMS320VC5470ZHKA датащи(PDF) 55 Page - Texas Instruments

номер детали TMS320VC5470ZHKA
подробное описание детали  TMS320VC5470 Fixed-Point Digital Signal Processor
PDF  94 Pages
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TMS320VC5470ZHKA датащи(HTML) 55 Page - Texas Instruments

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Electrical Specifications
46
December 2001 − Revised December 2002
SPRS017B
6.4
Package Thermal Resistance Characteristics
Table 6−1 provides the thermal resistance characteristics for the recommended package type used on the
TMS320VC5470 DSP.
Table 6−1. Thermal Resistance Characteristics
PARAMETER
GHK PACKAGE
UNIT
RΘJA
34
°C/W
RΘJC
9.5
°C/W
6.5
Timing Parameter Symbology
Timing parameter symbols used are created in accordance with JEDEC Standard 100. To shorten the
symbols, some of the pin names and other related terminology have been abbreviated as follows:
Lowercase subscripts and their meanings:
Letters and symbols and their meanings:
a
access time
H
High
c
cycle time (period)
L
Low
d
delay time
V
Valid
dis
disable time
Z
High impedance
en
enable time
f
fall time
h
hold time
r
rise time
su
setup time
t
transition time
v
valid time
w
pulse duration (width)
X
Unknown, changing, or don’t care level
The following load circuit in Figure 6−1 was used on all outputs pins and I/O pins in input mode. All timing
measurements in this data manual were measured from the 5470 connection to the following load circuit.
Tester Pin
Electronics
VLoad
IOL
CT
IOH
Output
Under
Test
50
Ω
Where: IOL
= 8 mA (all outputs)
IOH
= 8 mA (all outputs)
VLoad = 1.65 V
CT
= 13-pF typical load circuit capacitance
Figure 6−1. 3.3-V Test Load Circuit



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