SMJ320LC549 Datasheet, PDF (11/52 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSOR

SMJ320LC549
FIXEDĆPOINT DIGITAL SIGNAL PROCESSOR
SGUS032B – OCTOBER 2002 – REVISED MAY 2003
PARAMETER MEASUREMENT INFORMATION
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:
a
access time
c
cycle time (period)
d
delay time
dis
disable time
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
Letters and symbols and their meanings:
H
High
L
Low
V
Valid
Z
High impedance
signal transition reference points
All timing references are made at a voltage of 1.5 volts, except rise and fall times which are referenced at the
10% and 90% points of the specified low and high logic levels, respectively.
Tester Pin _VLoad
Electronics
IOL
50 Ω
C_T
Output
Under
Test
IOH
Where: I_OL = 1.5 mA (all outputs)
I_OH = 300 µA (all outputs)
V_Load = 1.5 V
C_T = 40 pF typical load circuit capacitance.
Figure 1. 3.3-V Test Load Circuit
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