SRAM

SRAM stands for Static Random Access Memory and is a type of semiconductor memory that uses bistable latching circuitry (flip-flop) to store each bit. It holds data bits in its memory so long as power is being supplied. It cannot hold data if power is removed. SRAM is used where speed or low power are needed. It’s higher density than DRAM, and less complicated structure makes it ideal to use in semiconductor memory scenarios where high capacity memory is used as seen in the working memory within computers.
SRAM is different to DRAM (dynamic RAM, which stores bits in cells consisting of a capacitor and a transistor), due to the fact that SRAM does not have to be refreshed unlike Dynamic which will lose data unless refreshed periodically. Also SRAM is faster and more expensive than DRAM.
SRAM is used for a computer’s cache memory as well as being part of the RAM digital to analogue converter found on a video card. SRAM can be designed with a general CMOS technology process with six transistors (6T memory cell) and no capacitors. Since transistors do not require power to prevent leakage, SRAM does not have to be refreshed on a regular basis:
Features include:
• Data is held statically – data is held in the semiconductor memory, no need to refresh data after every read data operation as long as the power is applied to the memory
• Three operational states which are hold, write and read
• Bistable (cross-coupled) INVs for storage
• Access transistors MAL and MAR – access to stored data for read and write
• Word line, WL, controls access – WL=0 (hold operation), WL=1 (read/write operation)
• Long data lifetime
• Simplicity
• Faster – quick and easy to control
• Used as cache memory
• Large size
• Price – expensive as it uses more chips than DRAM for the same amount of storage space
• High power Consumption
• Reliability
Disadvantages include:
• Capacity
• Varying power consumption
Can be found in the following:
• Computers
• Workstations
• Routers
• LCD screens and printers
• Electronics
• Microprocessor

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Beskrivning Pris Memory Size Organisation Number of Words Number of Bits per Word Maximum Random Access Time Address Bus Width Clock Frequency Low Power Timing Type Mounting Type Package Type Pin Count Dimensions Height
RS-artikelnummer 767-5963
Tillv. art.nrR1WV6416RBG-7SI#B0
318,68 kr
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Enheter
64Mbit 4M words x 16 bit 4M 16bit 70ns - - Yes Asynchronous Surface Mount FBGA 48 8.5 x 11 x 0.8mm 0.8mm
RS-artikelnummer 744-4561
Tillv. art.nrAS6C4008-55PCN
VarumärkeAlliance Memory
44,98 kr
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Enheter
4Mbit 512K x 8 bit 512K 8bit 55ns 19bit - Yes Asynchronous Through Hole PDIP 32 41.91 x 13.818 x 3.81mm 3.81mm
RS-artikelnummer 170-0895
Tillv. art.nrAS6C4008-55PCN
VarumärkeAlliance Memory
40,739 kr
Each (In a Tube of 13)
Enheter
4Mbit 512K x 8 bit 512K 8bit 55ns 19bit - Yes Asynchronous Through Hole PDIP 32 41.91 x 13.818 x 3.81mm 3.81mm
RS-artikelnummer 177-5513
Tillv. art.nrAS6C6264-55PCN
VarumärkeAlliance Memory
21,307 kr
Each (In a Tube of 15)
Enheter
64kbit 8K words x 8 bit 8K 8bit 55ns 13bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
RS-artikelnummer 538-158
Tillv. art.nrAS6C6264-55PCN
VarumärkeAlliance Memory
23,78 kr
Each (In a Pack of 2)
Enheter
64kbit 8K words x 8 bit 8K 8bit 55ns 13bit - Yes Asynchronous Through Hole PDIP 28 36.32 x 13.21 x 3.81mm 3.81mm
RS-artikelnummer 811-5185
Tillv. art.nrIS61WV25616EDBLL-10TLI
VarumärkeISSI
28,25 kr
Each (In a Pack of 2)
Enheter
4Mbit 256k x 16 256k 16bit 10ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS-artikelnummer 170-2183
Tillv. art.nrIS61WV25616EDBLL-10TLI
VarumärkeISSI
27,492 kr
Each (In a Tray of 135)
Enheter
4Mbit 256k x 16 256k 16bit 10ns 18bit - Yes Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS-artikelnummer 912-2859
Tillv. art.nr23LC1024-I/ST
VarumärkeMicrochip
17,245 kr
Each (In a Tube of 100)
Enheter
1Mbit 128K words x 8 bit 128K 8bit - 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
RS-artikelnummer 769-7349
Tillv. art.nr23LC1024-I/ST
VarumärkeMicrochip
18,765 kr
Each (In a Pack of 2)
Enheter
1Mbit 128K words x 8 bit 128Kk 8bit - 24bit 20MHz Yes Synchronous Surface Mount TSSOP 8 3.1 x 4.5 x 1.05mm 1.05mm
RS-artikelnummer 170-2182
Tillv. art.nrIS61WV25616BLL-10TLI
VarumärkeISSI
32,841 kr
Each (In a Tray of 135)
Enheter
4Mbit 256k x 16 256k 16bit 10ns 18bit - - Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS-artikelnummer 811-5181
Tillv. art.nrIS61WV25616BLL-10TLI
VarumärkeISSI
38,05 kr
Each (In a Pack of 2)
Enheter
4Mbit 256k x 16 256k 16bit 10ns 18bit - - Asynchronous Surface Mount TSOP 44 18.54 x 10.29 x 1.05mm 1.05mm
RS-artikelnummer 803-2272
Tillv. art.nr23LCV1024-I/P
VarumärkeMicrochip
21,342 kr
Each (In a Pack of 5)
Enheter
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
RS-artikelnummer 912-6710
Tillv. art.nr23LCV1024-I/P
VarumärkeMicrochip
20,671 kr
Each (In a Tube of 60)
Enheter
1Mbit 128K x 8 bit - 8bit 5ns 24bit 20MHz Yes - Through Hole PDIP 8 10.16 x 7.11 x 4.95mm 4.95mm
RS-artikelnummer 901-5767
Tillv. art.nrR1RW0408DGE-2PI#B0
181,98 kr
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Enheter
4Mbit 512K x 8 bit 512K 8bit 12ns 8bit 1MHz - - Surface Mount SOJ 36 23.62 x 10.29 x 2.75mm 2.75mm
RS-artikelnummer 170-2076
Tillv. art.nrIDT70V25L20PFGI
VarumärkeIDT
289,98 kr
Each (In a Tray of 45)
Enheter
128kbit 8K x 16 bit 8K 16bit 20ns 26bit - Yes Asynchronous Surface Mount TQFP 100 14 x 14 x 1.4mm 1.4mm
RS-artikelnummer 901-5786
Tillv. art.nrR1RW0416DSB-2LR#D0
189,63 kr
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4Mbit 256K x 16 bit 256K 16bit 12ns 16bit 1MHz Yes - Surface Mount TSOP 44 18.51 x 10.26 x 1mm 1mm
RS-artikelnummer 192-1574
Tillv. art.nrDS1245AB-120+
VarumärkeMaxim Integrated
281,87 kr
Each
Enheter
1024kbit 128K x 8 bit 128K 8bit 70ns 8bit - Yes - Through Hole EDIP 32 44.2 x 18.8 x 10.92mm 10.92mm
RS-artikelnummer 146-3214
Tillv. art.nr47L16-I/P
VarumärkeMicrochip
6,273 kr
Each (In a Tube of 60)
Enheter
16kbit 2048K x 8 - 8bit - - 1000kHz Yes Synchronous Through Hole DIP 8 10.2 x 7.1 x 4.83mm 4.83mm
RS-artikelnummer 181-8269
Tillv. art.nrCY7C1069G30-10ZSXI-CYP
307,191 kr
Each (In a Tray of 108)
Enheter
16Mbit 2M x 8 bit 2M 8bit 10ns - 100MHz - Asynchronous Surface Mount TSOP 54 22.51 x 10.26 x 1.05mm 1.05mm
RS-artikelnummer 193-8460
Tillv. art.nrCY7C1018DV33-10VXIT
15,866 kr
Each (On a Reel of 1000)
Enheter
1Mbit 128 k x 8 bit 128 k 8bit 10ns 8bit 1MHz - Asynchronous Through Hole SOJ 32 0.810 x 0.292 x 0.103in 2.62mm
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