Samsung Graphics Memory Code Information

**PsyK0t1c dRe4mZ** · 03-18-2006, 05:35 PM

K4XXXXXXXX-XXXX
-----------------------

1. Memory (K)

2. DRAM : 4

3. Small Classification
D : GDDR SDRAM
N : GDDR2 SDRAM
J : GDDR3 SDRAM
U : GDDR4 SDRAM

4~5. Density,Refresh
26 : 128M, 4K/32ms
28 : 128M, 4K/64ms
51 : 512M, 8K/64ms
52 : 512M, 8K/32ms
54 : 256M, 16K/16ms
55 : 256M, 4K/32ms
56 : 256M, 8K/64ms
62 : 64M, 2K/16ms
64 : 64M, 4K/64ms

6~7. Organization
16 : x16
32 : x32

8. Bank
2 : 2Bank
3 : 4Bank
4 : 8Bank

9. Interface, VDD, VDDQ
2 : LVTTL, 3.3V, 3.3V
4 : LVTTL, 2.5V, 2.5V
5 : SSTL2, 1.8V, 1.8V, LP
6 : SSTL2, 1.5V, 1.5V
8 : SSTL2, 2.5V, 2.5V
A : SSTL2, 2.5V, 1.8V
H : SSTL2, 3.3V, 2.5V
Q : SSTL2, 1.8V, 1.8V
R : SSTL2, 2.8V, 2.8V

10. Generation
M : 1st Generation
A : 2nd Generation
B : 3rd Generation
C : 4th Generation
E : 5th Generation
F : 7th Generation
G : 8th Generation
H : 9th Generation
I : 10th Generation
K : 12th Generation

11. "─“

12. Package
Q : TQFP
U : TQFP (Lead Free)
G : 84/144ball FBGA
Z : 84ball FBGA (Lead Free)
V : 144ball FBGA (Lead Free)
A : 136ball FBGA (Lead Free)
B : 136ball FBGA (Lead Free)
T : TSOP
L : TSOP (Lead Free)
J : FBGA (DDP)
E : FBGA (DDP, Lead Free)

13. Temp, Power
0 : NONE, NONE
A : Automotive, Normal
C : Commercial, Normal
J : Commercial, Medium
L : Commercial, Low
F : Commercial, Low, PASR & TCSR
B : Commercial, Super Low
R : Commercial, Super Low, PASR & TCSR
K : Commercial, Reduced
E : Extended, Normal
N : Extended, Low
G : Extended, Low, PASR & TCSR
U : Extended, Super Low
S : Extended, Super Low, PASR & TCSR
X : Extra Extend, Normal
I : Industrial, Normal
P : Industrial, Low
H : Industrial, Low, PASR & TCSR
D : Industrial, Super Low
T : Industrial, Super Low, PASR & TCSR

14~15. Speed (Wafer/Chip Biz/BGD:00)
07 : 0.7ns (1400MHz)
08 : 0.9ns (1200MHz)
1A : 1.0ns (1000MHz
11 : 1.1ns (900MHz )
12 : 1.25ns (800MHz )
14 : 1.429ns (700MHz)
16 : 1.667ns (600MHz)
18 : 1.818ns (550MHz)
20 : 2.0ns (500MHz)
22 : 2.2ns (450MHz)
25 : 2.5ns (400MHz)
2A : 2.86ns (350MHz)
2C : 2.66ns (375MHz)
33 : 3.3ns (300MHz)
36 : 3.6ns (275MHz)
40 : 4ns (250MHz)
45 : 4.5ns (222MHz)
50/5A : 5ns (200MHz)
55 : 5.5ns (183MHz)
60 : 6ns (166MHz )

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I have also compiled a COMPLETE guide to the code information for all Samsung DRAM chips here: http://www.xtremesystems.org/forums/...ad.php?t=93205

If anyone has any new information, or if I made any errors, PM me and I'll update.

Also, let me know if this is useful and I'll keep it updated.

**madgravity34** · 03-18-2006, 05:35 PM

Nice man. Thats some good information to have around.

**Titus** · 03-18-2006, 06:04 PM

very nice guide!!!

although it was a little off around the 8-9 digit part...my RAM chips were labled Samsung k4j52320c-bj11 549....but the guide for the most part was very helpful in identifying the most important aspects