© 2000 Scenix Semiconductor, Inc. All rights reserved. - 6 - www.scenix.com SX18AC/SX20AC/SX28AC/SX18AC75/SX20AC75/SX28AC75 2.3 Part Numbering   Table 2-1.  Ordering Information Device Pins I/O        Operating
Frequency (MHz) EE/Flash (Words)   RAM
(Bytes)  Operating
Temp. (°C) SX18AC/SO
SX18AC-I/SO
SX18AC75/SO 18
18
18 12
12
12 50
50
75 2K
2K
2K 136
136
136   0°C to +70°C
-40°C to +85°C 0°C to +70°C SX18AC/DP
SX18AC-I/DP
SX18AC75/DP 18
18
18 12
12
12 50
50
75 2K
2K
2K 136
136
136   0°C to +70°C
-40°C to +85°C 0°C to +70°C SX20AC/SS
SX20AC-I/SS
SX20AC75/SS 20
20
20 12
12
12 50
50
75 2K
2K
2K 136
136
136   0°C to +70°C
-40°C to +85°C 0°C to +70°C SX28AC/SO
SX28AC-I/SO
SX28AC75/SO 28
28
28 20
20
20 50
50
75 2K
2K
2K 136
136
136   0°C to +70°C
-40°C to +85°C 0°C to +70°C SX28AC/DP
SX28AC-I/DP
SX28AC75/DP 28
28
28 20
20
20 50
50
75 2K
2K
2K 136
136
136   0°C to +70°C
-40°C to +85°C 0°C to +70°C SX28AC/SS
SX28AC-I/SS
SX28AC75/SS 28
28
28 20
20
20 50
50
75 2K
2K
2K 136
136
136   0°C to +70°C
-40°C to +85°C 0°C to +70°C Figure 2-1. Part Number Reference Guide SX18ACXX-I/SO Package Type Extended Temperature Memory Size Feature Set Pin Count SceniX A = 512 word B = 1k word C = 2k word D = 4k word Speed Blank = 50 MHz 75 = 75 MHz 100 = 100 MHz DP = DIP SO = SOP SS = SSOP TQ = Tiny PQFP PQ = PQFP Blank = 0°C to +70°C I = -40°C to +85°C