Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are
defined as follows
74AC
Temperature Range Family
74AC
e
Commercial
54AC
e
Military
74ACT
e
Commercial TTL-Compatible
Device Type
Package Code
P
e
Plastic DIP
D
e
Ceramic DIP
F
e
Flatpak
L
e
Leadless Ceramic Chip Carrier (LCC)
S
e
Small Outline (SOIC)
125
P
C
QR
Special Variations
X
e
Devices shipped in 13 reels
QR
e
Commercial grade device
with burn-in
QB
e
Military grade device with
environmental and burn-in
processing shipped in tubes
Temperature Range
C
e
Commercial (
b
40 C to
a
85 C)
M
e
Military (
b
55 C to
a
125 C)
5
NSC [ NATIONAL SEMICONDUCTOR ]
