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$61.64
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
HK$80.86
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. 188-2765
Mfr. Part No.W631GU6MB12I
BrandWinbond
HK$40.614
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. 811-5113
Mfr. Part No.IS42S16160G-7TLI
BrandISSI
HK$61.60
Each
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. 811-5125
Mfr. Part No.IS42S16400J-7TLI
BrandISSI
HK$27.205
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. 188-2805
Mfr. Part No.W9725G6KB25I
BrandWinbond
HK$29.474
Each (In a Pack of 5)
units
256Mbit 32M x 8 bit - - - - 8bit - 32M WBGA 84 12.6 x 8.1 x 0.6mm 0.6mm 12.6mm
RS Stock No. 188-2642
Mfr. Part No.W9751G8KB25I
BrandWinbond
HK$23.842
Each (In a Pack of 5)
units
512Mbit 64M x 8 bit - - - - 8bit - 64M WBGA 60 12.6 x 8.1 x 0.6mm 0.6mm 12.6mm
RS Stock No. 193-8780
Mfr. Part No.S27KL0641DABHI020
HK$30.544
Each (In a Tray of 338)
units
64Mbit 8M x 8 bit DDR 100MHz 8bit - 8bit 36ns 8M FBGA 24 8 x 6 x 0.8mm 0.8mm 8mm
RS Stock No. 782-4563
Mfr. Part No.MT46V32M16P-5B :J
BrandMicron
HK$41.96
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. 171-2244
Mfr. Part No.W94AD6KBHX5I/TRAY
BrandWinbond
HK$49.42
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
RS Stock No. 188-2651
Mfr. Part No.W949D2DBJX5I
BrandWinbond
HK$41.244
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. 188-2742
Mfr. Part No.W631GG8MB12I
BrandWinbond
HK$30.848
Each (In a Pack of 5)
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. 188-2832
Mfr. Part No.W9425G6KH-5I
BrandWinbond
HK$18.86
Each (In a Pack of 5)
units
256Mbit 32M x 8 bit - 200MHz - - 8bit - 32M TSOP 66 22.35 x 10.29 x 1.05mm 1.05mm 22.35mm
RS Stock No. 193-8781
Mfr. Part No.S27KL0641DABHI020
HK$38.725
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
RS Stock No. 188-2597
Mfr. Part No.W9812G6KH-5I
BrandWinbond
HK$18.04
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. 188-2821
Mfr. Part No.W9812G2KB-6I
BrandWinbond
HK$68.265
Each (In a Pack of 2)
units
128Mbit 16M x 8 bit - 166MHz - - 8bit - 16M TFBGA 90 13.05 x 8.05 x 0.6mm 0.6mm 13.05mm
RS Stock No. 181-8347
Mfr. Part No.S27KS0641DPBHI020
HK$38.723
Each (In a Pack of 3)
units
64Mbit 8M x 8 bit - 333Mbit/s 8bit - 8bit 36ns 8M FBGA 24 8 x 6 x 0.8mm 0.8mm 8mm
RS Stock No. 201-7967
Mfr. Part No.S27KS0642GABHI020
HK$11,236.13
1 Tray of 338
Tray(s)
64Mbit 8M x 8 DDR 200MHz 8bit 16bit - - - FBGA 24 - - -
RS Stock No. 188-2587
Mfr. Part No.W9751G8KB25I
BrandWinbond
HK$18.957
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
RS Stock No. 782-4547
Mfr. Part No.MT48LC8M16A2P-6A :L
BrandMicron
HK$47.31
Each
units
128MB 8M x 16 bit - - 16bit 14bit 16bit 6ns 8M TSOP 54 22.22 x 10.16 x 1.2mm 1.2mm 22.22mm