Memory modules generally have sizes marked on them. If not, you have to look at the number of the chips. Here is a look:
samsung memory
Example: samsungk4h280838b -tcb0
Number 1 - chip function k, which represents the memory chip.
Digit 2 - chip type 4, represents dram.
Number 3 - Further type description of the chip, s represents sdram, h represents ddr, and g represents sgram.
Digits 4 and 5 - capacity and refresh rate. Memory with the same capacity uses different refresh rates and different numbers. 64, 62, 63, 65, 66, 67 and 6a represent 64mbit capacity; 28, 27 and 2a represent 128mbit capacity; 56, 55, 57 and 5a represent 256mbit capacity; 51 represents 512mbit capacity.
Digits 6 and 7 - the number of data line pins, 08 represents 8-bit data; 16 represents 16-bit data; 32 represents 32-bit data; 64 represents 64-bit data.
No. 11——Connect "-".
Bits 14 and 15 - chip speed, such as 60 is 6ns; 70 is 7ns; 7b is 7.5ns (cl=3); 7c is 7.5ns (cl=2); 80 is 8ns ; 10 is 10ns (66mhz).
After knowing the meaning of the main digits of the memory particle encoding, it is very easy to calculate the capacity of a memory stick after getting it. For example, a Samsung DDR memory is packaged with 18 samsungk4h280838b-tcb0 particles. The 4th and 5th digits of the particle number "28" represent that the particle is 128mbits, the 6th and 7th digits "08" represent that the particle has an 8-bit data bandwidth, so we can calculate that the capacity of the memory module is 128mbits (megabits) × 16 pieces/8bits=256mb (megabytes).
Note: "bit" means "digit", "b" means byte "byte", if a byte is 8 bits, divide by 8 when calculating. Regarding the calculation of memory capacity, there are two situations in the examples given in the article: one is non-ECC memory, every 8 particles with 8-bit data width can form a memory; the other is ECC memory, after every 64-bit data , an 8-bit ecc check code is also added. Through the check code, two-bit errors in the memory data can be detected and one-bit errors corrected. Therefore, in the actual calculation process of capacity, the check digit is not calculated, and the actual capacity of an 18-chip memory module with ECC function is multiplied by 16. At the time of purchase, you can also use this to determine whether a memory module with 18 or 9 memory chips is an ECC memory.
hynix (hyundai) modern
The meaning of modern memory:
hy5dv641622at-36
hyxxxxxxxxxxxxxxxx
123456789101112
1. hy represents a modern product
2. Memory chip type: (57=sdram, 5d=ddrsdram);
3. Working voltage: Blank=5v, v=3.3v, u=2.5v
4. Chip capacity and refresh rate: 16=16mbits, 4kref; 64=64mbits, 8kref; 65=64mbits, 4kref; 128=128mbits, 8kref; 129=128mbits, 4kref; 256=256mbits, 16kref; 257=256mbits, 8kref
5. Represents the data bit width output by the chip: 40, 80, 16, and 32 represent 4 bits and 8 bits respectively. , 16-bit and 32-bit
6. Number of banks: 1, 2, and 3 represent 2, 4, and 8 banks respectively, which is a power relationship of 2
7. i/o interface: 1:sstl_3, 2:sstl_2
8. Chip kernel version: It can be blank or letters such as a, b, c, d, etc. The later the number is, the newer the kernel is.
9. Represents power consumption: l=low-power chip, blank=ordinary chip
10. Memory chip packaging form: jc=400milsoj, tc=400miltsop-ⅱ, td=13mmtsop-ⅱ, tg=16mmtsop-ⅱ
11. Working speed: 55:183mhz, 5:200mhz, 45:222mhz, 43:233mhz, 4:250mhz, 33:300nhz, l:ddr200, h:ddr266b, k :ddr266a
Modern mbga packaged particles
infineon (Infineon)
Infineon is a branch of Siemens in Germany. Currently, Siemens’s products in the domestic market The memory particles produced by the subsidiary Infineon have only two capacities: particles with a capacity of 128mbits and particles with a capacity of 256mbits. The memory capacity and data width are listed in detail in the number. Infineon's memory queue organization and management mode is that each particle is composed of 4 banks. Therefore, its memory particle models are relatively small, and it is the easiest to identify.
hyb39s128400 is 128mb/4bits, "128" identifies the capacity of the particle, and the last three digits identify the memory data width. The same is true for others, such as: hyb39s128800 is 128mb/8bits; hyb39s128160 is 128mb/16bits; hyb39s256800 is 256mb/8bits.
The working speed of Infineon memory particles is expressed by adding a short line at the end of the model number and then marking the working speed.
-7.5——Indicates that the working frequency of this memory is 133mhz;
-8——Indicates that the working frequency of this memory is 100mhz.
For example:
One Kingston memory module is produced using 16 Infineon hyb39s128400-7.5 memory chips. Its capacity is calculated as: 128mbits (megabytes) × 16 pieces/8 = 256mb (megabytes).
One RAMAXEL memory module is produced using 8 Infineon hyb39s128800-7.5 memory chips. Its capacity is calculated as: 128mbits (megabytes) × 8 slices/8 = 128mb (megabytes).
kingmax, kti
Kingmax memory description
Kingmax memory is packaged in tinybga (tinyballgridarray). And this packaging mode is a patented product, so we see that the memory sticks made of kingmax particles are all produced by the factory itself. kingmax memory particles have two capacities: 64mbits and 128mbits. Here you can list the memory particle models of each capacity series.
Capacity remarks:
ksva44t4a0a——64mbits, 16m address space × 4-bit data width;
ksv884t4a0a——64mbits, 8m address space × 8-bit data Width;
ksv244t4xxx——128mbits, 32m address space × 4-bit data width;
ksv684t4xxx——128mbits, 16m address space × 8-bit data width;
ksv864t4xxx——128mbits, 8m address space × 16-bit data width.
The working speed of kingmax memory has four states, which are separated by dash symbols after the model number to identify the working speed of the memory:
-7a——pc133/cl=2; < /p>
-7——pc133/cl=3;
-8a——pc100/cl=2;
-8——pc100/cl=3.
For example, a kingmax memory stick is made of 16 ksv884t4a0a-7a memory chips. Its capacity is calculated as: 64mbits (megabytes) × 16 chips/8 = 128mb (megabytes).
micron (Micron)
Using the number mt48lc16m8a2tg-75 to illustrate the coding rules of Micron memory.
Meaning:
mt——The manufacturer name of micron.
48 - Type of memory. 48 represents sdram; 46 represents ddr.
lc——supply voltage. lc represents 3v; c represents 5v; v represents 2.5v.
16m8 - The memory particle capacity is 128mbits, and the calculation method is: 16m (address) × 8-bit data width.
a2——Memory kernel version number.
tg——Encapsulation method, tg is tsop encapsulation.
-75——Memory working speed, -75 is 133mhz; -65 is 150mhz.
Example: A micronddr memory stick is made of 18 chips numbered mt46v32m4-75. This memory supports ecc function. So each bank has an odd number of memory particles.
The capacity is calculated as: capacity 32m×4bit×16 pieces/8=256mb (megabytes).
winbond (Winbond)
Explanation of meaning:
wxxxxxxxx
12345
1. w represents memory The particles are produced by winbond
2. Represents the video memory type: 98 is sdram, 94 is ddrram.
3. Represents the version number of the particles: common version numbers are b and h; < /p>
4. Represents packaging, h is tsop packaging, b is bga packaging, d is lqfp packaging
5. Working frequency: 0: 10ns, 100mhz; 8: 8ns, 125mhz; z : 7.5ns, 133mhz; y: 6.7ns, 150mhz; 6: 6ns, 166mhz; 5: 5ns, 200mhz
mosel (Taiwan Mosel)
Taiwan Mosel Technology is Taiwan A large memory chip manufacturer does not supply much to mainland China, so we are not familiar enough with it.
This particle number is v54c365164vdt45. The 6 and 7 digits in the number are 65, which means that the single particle is 64/8 = 8mb. From the 8 and 9 digits in the number, we know that the single particle width is 16 bits. From the last three digits in the number, t45, we know that the particle speed is 4.5ns
nanya (Nanya), elixir, pqi, pluss, atl, eudar
Nanya Technology is the sixth largest memory chip manufacturer in the world and the only Taiwanese memory chip manufacturer to make a profit last year of companies, it ranks fifth globally. This video memory is numbered nt5sv8m16ct-7k, where the 4th digit "s" indicates sdram video memory, the 6th and 7th digits 8m indicate a single particle capacity of 8m, the 8th and 9th digits 16 indicate a single particle width of 16bit, -7k indicates a speed of 7ns.
v-data (Hong Kong ADATA), a-data (Taiwan ADATA), vt
The memory particle number is vdd8608a8a-6b h0327, which is a 6 nanosecond particle. The 8-piece noodle has a capacity of 256m, and 0327 means that its production date is the 27th week of 2003