Serial number identification of modern memory chips

Serial number identification of modern memory chips

1. The identification format on the SDRAM memory chip of HYUNDAI is as follows (here we are talking about the new version of HY memory chip after September 30, 2000):

HY XX X XX X X X X XX X -XX
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩

The first field is composed of HY, which represents the product of HYUNDAI.
The second field represents the product type: 57 is usually used to represent SDRAM.
The third field represents the voltage: V is usually used to represent the rated voltage of SDRAM 3.3V.
The fourth field represents the density and refresh rate of a memory chip: 64 represents 64Mbit, 4K refresh; 65 represents 64Mbit, 8K refresh; 28 represents 128Mbit, 4K refresh; 56 represents 256Mbit, 8K refresh.
The fifth field represents the data bandwidth: 4 represents 4bit, 8 represents 8bit, 16 represents 16bit, and 32 represents 32bit.
The sixth field represents the number of banks in the memory chip: 1 represents 2BANK; 2 represents 4BANK.
The seventh field represents the electrical interface: 0 represents LVTTL; 1 represents SSTL_3.
The eighth field represents the chip revision: blank or H represents the 1st edition, A or HA represents the 2nd edition; B or HB represents the 3rd edition; C or HC represents the 4th edition, and so on. The ninth field represents the packaging method: T represents TSOP; Q represents TQFP; I represents BLP; L represents CSP (LF-CSP). The tenth field represents the speed of the memory chip: Modern Electronics has gradually stopped producing memory chips with numbers at the end of the number, such as -10S, -7J, -75, etc. since September 30, 2000, and has adopted English letters as the new numbering method: H represents 7.5ns (PC133 CL=3); P represents 10ns (PC100 CL=2); S represents 10ns (PC100 CL=3). For example, a memory chip marked as "HY57V28820HCT-H" (see Figure 1) refers to HY's 128Mbit SDRAM memory chip, refresh rate is 4K Ref, data bandwidth is 8 bits, Bank is 4, interface is LVTTL, chip revision is 4th edition, speed is 7.5ns (PC133 CL=3). 2. Identification of Hyundai DDR SDRAM memory chips The identification format on Hyundai's DDR SDRAM memory chips is as follows: HY XX X XX X X X X -XX ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ The first field consists of HY, which means it is a Hyundai product. The second field represents the product type: 5D is usually used to represent DDR SDRAM chips. The third field represents the voltage: U is usually used to represent the rated voltage of DDR SDRAM, which is 2.5V. The 4th field represents the density and refresh rate of a memory chip: 64 represents 64Mbit, 4K refresh; 65 represents 64Mbit, 8K refresh; 28 represents 128Mbit, 4K refresh; 56 represents 256Mbit, 8K refresh. The 5th field represents the data bandwidth: 4 represents 4bit, 8 represents 8bit, 16 represents 16bit, and 32 represents 32bit. The 6th field represents the number of banks in the memory chip: 1 represents 2BANK; 2 represents 4BANK. The 7th field represents the electrical interface: 2 is usually used to represent the 184-pin DDR SDRAM interface. The 8th field represents the packaging method: T represents TSOP; Q represents TQFP; I represents BLP; L represents CSP (LF-CSP). The 9th field represents the speed of the memory chip: K represents DDR266a; H represents DDR266b; L represents DDR200. For example, a memory chip marked as "HY5DU28820HCT-H" (see Figure 2) refers to HY's 128Mbit DDR SDRAM memory chip, refreshed as 4K Ref, data bandwidth as 8 bits, Bank as 4, packaged as TSOP, and speed as DDR266a. III. Identification of Hyundai RDRAM memory chips The identification format on Hyundai's RDRAM memory chips is as follows: HY XX XXX XX X XX -X ① ② ③ ④ ⑤ ⑥ ⑦ The first field consists of HY, representing a Hyundai product. The second field represents the product type: 5R is usually used to represent RDRAM chips. The third field represents the density of a memory chip: 128 represents 128Mbit; 144 represents 144Mbit; 256 represents 256Mbit; 288 represents 288Mbit. The fourth field represents the chip revision: blank or H represents the 1st version, A or HA represents the 2nd version; B or HB represents the 3rd version; C or HC represents the 4th version. The fifth field represents the data bandwidth: 4 represents 4 bits, 8 represents 8 bits, 16 represents 16 bits, and 32 represents 32 bits. The sixth field represents the speed identifier of the memory chip: 40 represents 40ns; 45 represents 45ns; 53 represents 53ns. The seventh field represents the operating frequency of the memory chip: 6 represents 600MHz; 7 represents 711MHz; 8 represents 800MHz; 1 represents 1066MHz. For example, the memory chip identifier "HY5R128HC840-H" (see Figure 3) refers to HY's 128Mbit RDRAM memory chip, the chip revision is version 4, the data bandwidth is 8 bits, the speed is 40ns, and the operating frequency is 800MHz.