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:
74F 257A
S
C
X
Temperature Range Family
Special Variations
e
e
e
e
74F
54F
Commercial
Military
X
QB
Devices shipped in 13 reels
×
Military grade with
environmental and burn-in
processing shipped in tubes
Device Type
Package Code
Temperature Range
e
e
e
e
e
P
D
F
L
Plastic DIP
Ceramic DIP
Flatpak
Leadless Ceramic Chip Carrier (LCC)
Small Outline SOIC JEDEC
Small Outline SOIC EIAJ
e
e
a
C
M
Commercial (0 C to 70 C)
§
§
b a
Military ( 55 C to 125 C)
§
§
S
e
SJ
Physical Dimensions inches (millimeters)
20-Lead Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
5
ROCHESTER [ Rochester Electronics ]
