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
PHP335.79
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. 782-4535
Mfr. Part No.MT48LC4M32B2P-6A :L
BrandMicron
PHP463.05
Each
units
128MB 4M x 32 bit - - 32bit 14bit 32bit 6ns 4M TSOP 86 22.22 x 10.16 x 1.2mm 1.2mm 22.22mm
RS Stock No. 811-5125
Mfr. Part No.IS42S16400J-7TLI
BrandISSI
PHP124.95
Each (In a Pack of 2)
units
64Mbit 4M x 16 bit - 143MHz 16bit 14bit 16bit 5.4ns 4M TSOP 54 22.42 x 10.29 x 1.05mm 1.05mm 22.42mm
RS Stock No. 170-2171
Mfr. Part No.IS42S16400J-7TLI
BrandISSI
PHP118.327
Each (In a Tray of 108)
units
64Mbit 4M x 16 bit - 143MHz 16bit 14bit 16bit 5.4ns 4M TSOP 54 22.42 x 10.29 x 1.05mm 1.05mm 22.42mm
RS Stock No. 797-5790
Mfr. Part No.AS4C1M16S-7TCN
PHP119.363
Each (In a Pack of 3)
units
16Mbit 1M x 16 bit - 143MHz 16bit - 16bit 5.4ns 512K TSOP 50 21.08 x 10.29 x 1.1mm 1.1mm 21.08mm
RS Stock No. 188-2597
Mfr. Part No.W9812G6KH-5I
BrandWinbond
PHP98.151
Each (In a Tray of 108)
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. 188-2577
Mfr. Part No.W949D2DBJX5I
BrandWinbond
PHP186.764
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. 188-2835
Mfr. Part No.W972GG6KB25I
BrandWinbond
PHP811.37
Each
units
2Gbit 256M x 8 bit - - - - 8bit - 256M WBGA 84 12.6 x 8.1 x 0.6mm 0.6mm 12.6mm
RS Stock No. 171-2198
Mfr. Part No.W9725G6KB-25/TRAY
BrandWinbond
PHP108.101
Each (In a Tray of 209)
units
256Mbit 16 M x 16 bit DDR2 800MHz 16bit 16bit 16M - 16M WBGA 84 8.1 x 12.6 x 0.8mm 0.8mm 8.1mm
RS Stock No. 188-2603
Mfr. Part No.W9812G6KH-6I
BrandWinbond
PHP135.616
Each (In a Pack of 5)
units
128Mbit 16M x 8 bit - 166MHz - - 8bit - 16M TSOP 54 22.35 x 10.29 x 1.05mm 1.05mm 22.35mm
RS Stock No. 188-2730
Mfr. Part No.W9712G6KB25I
BrandWinbond
PHP143.546
Each (In a Pack of 5)
units
128Mbit 16M x 8 bit - - - - 8bit - 16M TFBGA 84 12.6 x 8.1 x 0.8mm 0.8mm 12.6mm
RS Stock No. 170-2174
Mfr. Part No.IS42S32400F-7TL
BrandISSI
PHP177.789
Each (In a Tray of 108)
units
128Mbit 4M x 32 - 143MHz 32bit 14bit 32bit 6.5ns 4M TSOP 86 22.42 x 10.29 x 1.05mm 1.05mm 22.42mm
RS Stock No. 201-7969
Mfr. Part No.S27KS0643GABHV020
PHP64,169.47
1 Tray of 338
Tray(s)
64Mbit 8M x 8 DDR 200MHz 8bit 16bit - - - FBGA 24 - - -
RS Stock No. 811-5141
Mfr. Part No.IS42S32400F-7TL
BrandISSI
PHP212.70
Each
units
128Mbit 4M x 32 - 143MHz 32bit 14bit 32bit 6.5ns 4M TSOP 86 22.42 x 10.29 x 1.05mm 1.05mm 22.42mm
RS Stock No. 188-2578
Mfr. Part No.W949D6DBHX5I
BrandWinbond
PHP208.373
Each (In a Tray of 312)
units
512Mbit 64M x 8 bit - 200MHz 16bit - 8bit - 64M VFBGA 60 9.1 x 8.1 x 0.65mm 0.65mm 9.1mm
RS Stock No. 170-2169
Mfr. Part No.IS42S16160G-7TLI
BrandISSI
PHP249.146
Each (In a Tray of 108)
units
256Mbit 16M x 16 bit - 143MHz 16bit 15bit 16bit 5.4ns 16M TSOP 54 22.42 x 10.29 x 1.05mm 1.05mm 22.42mm
RS Stock No. 188-2720
Mfr. Part No.W631GG6MB12I
BrandWinbond
PHP232.554
Each (In a Pack of 5)
units
1Gbit 128M x 8 bit - 800MHz - - 8bit - 128M VFBGA 96 13.1 x 7.6 x 0.6mm 0.6mm 13.1mm
RS Stock No. 173-0302
Mfr. Part No.AS4C4M32S-7BCN
PHP14,969.389
Each (In a Tray of 190)
units
128Mbit 4M x 32 bit - 133MHz 32bit - 32bit 5.4ns 1M TFBGA 90 8.1 x 13.1 x 0.79mm 0.79mm 8.1mm
RS Stock No. 188-2581
Mfr. Part No.W971GG6SB25I
BrandWinbond
PHP227.409
Each (In a Tray of 209)
units
1Gbit 128M x 8 bit - - - - 8bit - 128M WBGA 84 12.6 x 8.1 x 0.8mm 0.8mm 12.6mm
RS Stock No. 171-2244
Mfr. Part No.W94AD6KBHX5I/TRAY
BrandWinbond
PHP326.70
Each
units
1Gbit 64 M x 16 bit DDR DDR 16bit 16bit 64 M 6.5ns 64M VFBGA 60 8.1 x 9.1 x 0.65mm 0.65mm 8.1mm