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|  MIL-M-38510/79D
6.5 Abbreviations, symbols and definitions. The abbreviations, symbols, and definitions used herein are defined
in MIL-PRF-38535 and MIL-HDBK-1331, and as follows:
GND .................................................. Electrical ground (common terminal)
IIN ...................................................... Current flowing into an input terminal.
VIN ..................................................... Voltage level at an input terminal.
tZH ...................................................... Output enable time (of a three-state output) to high level. The time
between the specified reference points on the input and output voltage
waveforms with the three-state output changing from a high-impedance
(off) state to the defined high level.
tZL....................................................... Output enable time (of a three-state output) to low level. The time
between the specified reference points on the input and output voltage
waveforms with the three-state output changing from a high-impedance
(off) state to the defined low level.
tHZ ...................................................... Output disable time (of a three-state output) from high level. The time
between the specified reference points on the input and output voltage
waveforms with the three-state output changing from the defined high
level impedance (off) state.
tLZ....................................................... Output disable time (of a three-state output) from low level. The time
between the specified reference points on the input and output voltage
waveforms with the three state output changing from the defined low
level to a high impedance (off) state.
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 shall 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-35810 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.
Commercial type
Device type
01
54S151
02
54S153
03
54S157
04
54S158
05
54S251
06
54S257
07
54S258
08
54S253
6.8 Manufacturers' designations. Manufacturers' circuits included in this specification are designated as shown in
table IV.
6.9 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect
to the previous issue, due to the extent of the changes.
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