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Timing parameter abbreviations. |
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|  MIL-M-38510/231C
6.4.1 Timing parameter abbreviations. All timing abbreviations use upper case characters with no subscripts.
The initial character is always T and is followed by four descriptors. These characters specify two signal points
arranged in a "from-to" sequence that define a timing interval. The two descriptors for each signal point specify the
signal name and the signal transitions. Thus the format is:
T
X
X
X
X
Signal name from which interval is defined
Transition direction for first signal
Signal name to which interval is defined
Transition direction for second signal
a.
Signal definitions:
A = Address
D = Data in
Q = Data out
W = Write enable
E = Chip enable
S = Chip select
G = Output enable
C = Change
b.
Transition definitions:
H = Transition to high
L = Transition to low
V = Transition to valid
X = Transition to invalid or don't care
Z = Transition to off (high impedance)
6.6 Logistic support. Lead materials and finishes (see 3.4) are interchangeable. Unless otherwise specified,
microcircuits acquired for Government logistic support will be acquired to device class B (see 1.2.2), lead material
and finish A (see 3.4). Longer length leads and lead forming should not affect the part number
6.7 Substitutability. The cross-reference information below is presented for the convenience of users.
Microcircuits covered by this specification will functionally replace the listed generic-industry type. Generic-industry
microcircuit types may not have equivalent operational performance characteristics across military temperature
ranges or reliability factors equivalent to MIL-M-38510 device types and may have slight physical variations in relation
to case size. The presence of this information should not be deemed as permitting substitution of generic-industry
types for MIL-M-38510 types or as a waiver of any of the provisions of MIL-PRF-38535.
Military
Generic-industry
device type
Type
01
93415
02
93425
03
93L415
04
93L425
05
93415
06
93425
07
93415
08
93425A
09
93412
10
93422
11
93L412
12
93L422
13
93L425A
14
93422A
15
93L422A
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