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What is Dual Port RAM?

Dual port RAM can read and write different memory cells simultaneously at different addresses. This is the main difference between dual port RAM and single port RAM, as single port RAM can only be accessed at one address at a time. Therefore, single port RAM allows only one memory cell to be read/write during each clock cycle. Also, single port RAM uses a 6 transistor basic ram cell, whereas a dual port ram cell uses an 8 transistor cell for memory. This means that the area of a single port RAM cell is smaller than the area of a dual port RAM cell.

Types of Dual Ports

There are several different kinds of dual ports. At Future Electronics we stock many of the most common types categorized by memory density, operating mode, memory organization, maximum access time, packaging type and nominal supply voltage. The parametric filters on our website can help refine your search results depending on the required specifications.

The most common sizes for memory density are 64 kb, 128 kb, 512 kb and 1Mb. We also carry dual ports with memory density up to 18 Mb. Nominal supply voltage can be up to 5.5 V, with the most common sizes being 3.2 V and 5 V.

Dual Ports from Future Electronics

Future Electronics has a complete selection of dual ports from several manufacturers that can be used as dual ported memories, dual port SRAM or dual port SDRAM. Simply choose from the dual port technical attributes below and your search results will quickly be narrowed in order to match your specific dual port application needs. We deal with Cypress as a dual port manufacturer.

Applications for Dual Ports:

Video RAM, also known as VRAM, is a type of dual ported dynamic RAM (DRAM) that is used for video memory. VRAM allows a computer CPU to draw the image at the same time that the video hardware is reading it out to the screen. Other types of dual port RAM are based on static RAM (SRAM). Most computer CPUs implement their processor registers as a dual ported or multi ported RAM.

Choosing the Right Dual Port:

When you are looking for the right dual ports, you can filter the results by various attributes with the FutureElectronics.com parametric search: by Memory Density (8 kb, 64 kb, 128 kb, 512 kb, …), Nominal Supply Voltage (up to 5.5 V) and Maximum Access Time (from 3.3 ns to 65 ns) to name a few. You will be able to find the right dual ported memories, dual port SDRAM or dual port SRAM chip for any of your circuits.

Dual Ports in Production Ready Packaging or R&D Quantities

If the quantity of dual ports required is less than a full reel, we offer to customers many of our dual port products in tube, tray or individual quantities that will help you avoid unneeded surplus.

In addition, Future Electronics offers its clients a unique bonded inventory program designed to eliminate potential problems that could arise from an unpredictable supply of products containing raw metals and products with long or erratic lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.


Featured Dual Port Products


Manufacturer Part Number Description
Cypress AS4C16M16S-7TCN AS4C4M16S 256 Mb 16 M x 16 143 MHz High-speed CMOS Synchronous DRAM -TSOP II-54
Cypress AS4C8M16S-7TCN AS4C8M16S128 Mb (8 M x 16) 143 MHz High-speed CMOS Synchronous DRAM - TSOP II-54
Cypress AS4C8M16S-6TIN AS4C8M16S 128 Mb (8 M x 16)166 MHz High-speed CMOS Synchronous DRAM -TSOP II-54
Cypress AS4C4M16S-6TIN AS4C4M16S 64 Mb (4 M x 16)166 MHz High-speed CMOS Synchronous DRAM -TSOP II-54
Cypress AS4C16M16S-6TIN AS4C16M16S 256 Mb (16 M x 16)166 MHz High-speed CMOS Synchronous DRAM-TSOP II-54
Cypress M0697.01 M0 Series 512 MB (64 M X 64) CL3 DDR DIMM SDRAM - TSSOP-66
Cypress CMP266PC1024.01 CMP266PC 1 GB (64M x 8) 2.5 V Unbuffered 184 Pin DDR DIMM Memory
Cypress CMP266PC512.01 CMP266PC 512 MB (32M x 8) 2.5 V Unbuffered 184 Pin DDR DIMM Memory
Cypress CMP266RD1024.01 CMP266RD 1 GB (128M x 4) 2.5 V Registered 184 Pin DDR DIMM Memory-Server
Cypress CMP266RD2048.01 CMP266RD 2 GB (128M x 4) 2.5 V Registered 184 Pin DDR DIMM Memory-Server
Cypress CMP333PC1024.01 CMP333PC 1 GB (64M x 8) 2.5 V Unbuffered 184 Pin DDR DIMM Memory
Cypress CMP333PC256.01 CMP333PC 256 MB (32M x 8) 2.5 V Unbuffered 184 Pin DDR DIMM Memory
Cypress CMP333PC512.01 CMP333PC 512 MB (64M x 8) 2.5 V Unbuffered 184 Pin DDR DIMM Memory
Cypress CMP333RD1024.02 CMP333RD 1 GB (128M x 4) 2.5 V Registered 184 Pin DDR DIMM Memory-Server
Cypress CMP333RD2048.01 CMP333RD 2 GB (128M x 4) 2.5 V Registered 184 Pin DDR DIMM Memory-Server
Cypress CMP333RD512.01 CMP333RD 512 MB (320 x 8) 2.5 V Registered 184 Pin DDR DIMM Memory
Cypress M0635.01 M0819.01 Series 128 Mb 3.3 V 16 M x 16 Synchronous Dynamic RAM Memory Module
Cypress M0819.01 M0819.01 Series 128 Mb 3.3 V 16 M x 16 Synchronous Dynamic RAM Memory Module
Cypress UPD48288218FF-E33-DW1-A UPD48288218 Series 288 Mbit (16 M x 18) 400 MHz Low Latency DRAM - TFBGA-144
Cypress UPD48288218FF-E33-DW1-SSA UPD48288218 Series 288 Mbit (16 M x 18) 400 MHz Low Latency DRAM - TFBGA-144
Cypress UPD48288236FF-E33-DW1 UPD48288236 Series 288 Mbit (8 M x 36) 400 MHz Low Latency DRAM - TFBGA-144
Cypress UPD48288236FF-E33-DW1-SSA UPD48288236 Series 288 Mbit (8 M x 36) 400 MHz Low Latency DRAM - TFBGA-144
Cypress K4S641632N-LC75T00 64M (4Mx16) SDRAM, TSOP, 133MHz
Cypress CY7C024-15AXC CY7C024 Series 64 kbit (4 K x 16) 5 V 15 ns Dual-Port Static RAM -TQFP-100
Cypress UG0128D7488LM-DH 1 GB, 128 M x 72, DDR SDRAM DIM

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