SDRAM

SDRAM, unlike regular DRAM, operates while syncing with the CPU clock. This syncing means the RAM waits for the clock signal before it will respond to data input. Unlike regular DRAM that will respond immediately to input data, SDRAM has a pipelining function allowing the CPU to process multiple tasks in parallel. RS Components offers a range of SDRAM products that vary in memory size from 16Mbit to 2Gbit.

What is the difference between RAM, DRAM, and SDRAM?

RAM or, Random Access Memory, is in almost all computing-capable devices, including handheld devices like smartphones, tablets, and games consoles, as well as laptops, desktop computers, televisions and so much more. RAM enables these devices to process tasks, manage information and solve problems. Aside from memory size, access time and data rates are key to having the most efficient and high-performing device possible. These two factors are what allow CPUs to access the system RAM and engage processes and solve problems. Shorter access times provide faster access, building more efficient working environments.

Data rates, measured in Megahertz (MHz), varies across types and sizes of RAM and combined with bus widths and access time, data rates play a large part in processing. The data rate is quite simply the speed at which data can be fed into and out of systems. This means time taken to feed a process into the RAM and then transfer the results of the process undertaken back to the computer or device using it. Higher MHz values on RAM provide faster transfer times allowing systems to both feed and receive information faster.

DRAM, or Dynamic Random Access Memory, is a type of RAM used for short-term data storage and uses one transistor to store data on one capacitor, but the data is lost once the capacitor loses its charge unless it is periodically recharged. This recharging is where the 'dynamic' is taken from. DRAM sends instructions to the processor as soon as it receives them, in contrast to SDRAM, or Synchronous Dynamic Random Access Memory, which is synchronised to the computer's clock. The difference this creates is that instructions join a pipeline of instructions to be processed, allowing for more commands to be received rather than waiting for one process to finish before allowing another to be received. This allows SDRAM to operate at much higher speeds than other forms of RAM.


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Description Price Memory Size Organisation SDRAM Class Data Rate Data Bus Width Address Bus Width Number of Bits per Word Maximum Random Access Time Number of Words Package Type Pin Count Dimensions Height Length
RS Stock No. 782-4553
Mfr. Part No.MT48LC16M16A2P-6A:G
BrandMicron
HK$66.23
Each
units
256MB 16M x 16 bit - - 16bit 15bit 16bit 6ns 16M TSOP 54 22.22 x 10.16 x 1.2mm 1.2mm 22.22mm
RS Stock No. 188-2571
Mfr. Part No.W631GU6MB12I
BrandWinbond
HK$50.988
Each (In a Tray of 198)
units
1Gbit 128M x 8 bit - 800MHz - - 8bit - 128M VFBGA 96 13.1 x 7.6 x 0.6mm 0.6mm 13.1mm
New
RS Stock No. 230-8430
Mfr. Part No.AS4C4M16SA-6TIN
HK$27.068
Each (In a Pack of 5)
units
64Mbit 4M x 16 DDR 200MHz 16bit 13bit - - - TSOP 54 - - -
RS Stock No. 193-8781
Mfr. Part No.S27KL0641DABHI020
HK$46.17
Each (In a Pack of 2)
units
64Mbit 8M x 8 bit DDR 100MHz 8bit - 8bit 36ns 8M FBGA 24 8 x 6 x 0.8mm 0.8mm 8mm
New
RS Stock No. 230-8419
Mfr. Part No.AS4C16M16SA-7TCN
HK$28.028
Each (In a Tray of 108)
units
256Mbit 16M x 16 DDR 166MHz 16bit 13bit - - - TSOP 54 - - -
New
RS Stock No. 230-8432
Mfr. Part No.AS4C4M16SA-7BCN
HK$28.096
Each (In a Pack of 5)
units
64Mbit 4M x 16 DDR 200MHz 16bit 12bit - - - FBGA 54 - - -
RS Stock No. 188-2573
Mfr. Part No.W631GU8MB12I
BrandWinbond
HK$48.97
Each (In a Tray of 242)
units
1Gbit 128M x 8 bit - 800MHz - - 8bit - 128M VFBGA 78 10.6 x 8.1 x 0.6mm 0.6mm 10.6mm
RS Stock No. 188-2835
Mfr. Part No.W972GG6KB25I
BrandWinbond
HK$159.23
Each
units
2Gbit 256M x 8 bit - - - - 8bit - 256M WBGA 84 12.6 x 8.1 x 0.6mm 0.6mm 12.6mm
New
RS Stock No. 230-8422
Mfr. Part No.AS4C16M16SA-7TCNTR
HK$37.58
Each (In a Pack of 2)
units
256Mbit 16M x 16 DDR 166MHz 16bit 13bit - - - TSOP 54 - - -
RS Stock No. 188-2844
Mfr. Part No.W9812G6KH-5I
BrandWinbond
HK$24.226
Each (In a Pack of 5)
units
128Mbit 16M x 8 bit - 200MHz - - 8bit - 16M TSOP 54 22.35 x 10.29 x 1.05mm 1.05mm 22.35mm
RS Stock No. 188-2651
Mfr. Part No.W949D2DBJX5I
BrandWinbond
HK$53.006
Each (In a Pack of 5)
units
512Mbit 64M x 8 bit - 200MHz 32bit - 8bit - 64M VFBGA 90 13.1 x 8.1 x 0.65mm 0.65mm 13.1mm
RS Stock No. 188-2577
Mfr. Part No.W949D2DBJX5I
BrandWinbond
HK$42.303
Each (In a Tray of 240)
units
512Mbit 64M x 8 bit - 200MHz 32bit - 8bit - 64M VFBGA 90 13.1 x 8.1 x 0.65mm 0.65mm 13.1mm
RS Stock No. 188-2587
Mfr. Part No.W9751G8KB25I
BrandWinbond
HK$19.252
Each (In a Tray of 209)
units
512Mbit 64M x 8 bit - - - - 8bit - 64M WBGA 60 12.6 x 8.1 x 0.6mm 0.6mm 12.6mm
New
RS Stock No. 230-8420
Mfr. Part No.AS4C16M16SA-7TCN
HK$35.805
Each (In a Pack of 2)
units
256Mbit 16M x 16 DDR 166MHz 16bit 13bit - - - TSOP 54 - - -
New
RS Stock No. 230-8421
Mfr. Part No.AS4C16M16SA-7TCNTR
HK$25.674
Each (On a Reel of 1000)
units
256Mbit 16M x 16 DDR 166MHz 16bit 13bit - - - TSOP 54 - - -
RS Stock No. 188-2632
Mfr. Part No.W9825G6KH-6I
BrandWinbond
HK$29.582
Each (In a Pack of 5)
units
256Mbit 32M x 8 bit - 166MHz - - 8bit - 32M TSOP 54 22.35 x 10.29 x 1.05mm 1.05mm 22.35mm
New
RS Stock No. 230-8425
Mfr. Part No.AS4C32M16SB-7TCN
HK$92.94
Each (In a Tray of 108)
units
- 32M x 16 DDR 200MHz 16bit 13bit - - - TSOP 54 - - -
RS Stock No. 782-4563
Mfr. Part No.MT46V32M16P-5B :J
BrandMicron
HK$71.08
Each
units
512MB 32M x 16 bit DDR 200MHz 16bit 15bit 16bit 5ns 32M TSOP 66 22.22 x 10.16 x 1.2mm 1.2mm 22.22mm
RS Stock No. 170-2170
Mfr. Part No.IS42S16160G-7TL
BrandISSI
HK$29.181
Each (In a Tray of 108)
units
256Mbit 16M x 16 - 143MHz 16bit 15bit 16bit 5.4ns 16M TSOP 54 22.42 x 10.29 x 1.05mm 1.05mm 22.42mm
RS Stock No. 188-2660
Mfr. Part No.W9864G6KH-6I
BrandWinbond
HK$20.568
Each (In a Pack of 5)
units
64Mbit 8M x 8 bit - 166MHz - - 8bit - 8M TSOP 54 22.35 x 10.29 x 1.05mm 1.05mm 22.35mm