PDF STK22C48 Data sheet ( Hoja de datos )

Número de pieza	STK22C48
Descripción	2Kx8 AutoStore nvSRAM
Fabricantes	Simtek
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Hay una vista previa y un enlace de descarga de STK22C48 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas
No Preview Available ! www.DataSheet4U.com FEATURES • 25, 45 ns Read Access & R/W Cycle Times • Unlimited Read/Write Endurance • Automatic Non-Volatile STORE on Power Loss • Non-Volatile STORE Under Hardware Control • Automatic RECALL to SRAM on Power Up • Unlimited RECALL Cycles • 1 Million STORE Cycles • 100-Year Non-volatile Data Retention • Single 5V + 10% Operation • Commercial, Industrial, and Military Temperatures • 28-Pin 300 mil SOIC or 330 mil SOIC (RoHS- Compliant) STK22C48 2Kx8 AutoStore nvSRAM DESCRIPTION The Simtek STK22C48 is a 16Kb fast static RAM with a nonvolatile Quantum Trap storage element included with each memory cell. The SRAM provides the fast access & cycle times, ease of use, and unlimited read & write endurance of a normal SRAM. Data transfers automatically to the non-volatile stor- age cells when power loss is detected (the STORE operation). On power-up, data is automatically restored to the SRAM (the RECALL operation). Both STORE and RECALL operations are also available under software control. The Simtek nvSRAM is the first monolithic non-vola- tile memory to offer unlimited writes and reads. It is the highest-performance, most reliable non-volatile memory available. BLOCK DIAGRAM A5 A6 A7 A8 A9 VCCX VCAP Quantum Trap 32 x 512 STATIC RAM ARRAY 32 x 512 STORE RECALL POWER CONTROL STORE/ RECALL CONTROL HSB DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 COLUMN I/O COLUMN DEC A0 A1 A2 A3 A4 A10 G E W This product conforms to specifications per the terms of Simtek standard warranty. The product has completed Simtek internal qualification testing and has reached production status. 1 Document Control #ML0004 Rev 0.3 February 2007 1 page SYMBOLS NO. #1 #2 Alt. PARAMETER 14 tELWH tELEH tCW Chip Enable to End of Write 15 tDVWH tDVEH tDW Data Set-up to End of Write 16 tWHDX tEHDX tDH Data Hold after End of Write 17 tAVWH tAVEH tAW Address Set-up to End of Write 18 tAVWL tAVEL tAS Address Set-up to Start of Write 19 tWHAX 20 tWLQZ i, j tEHAX tWR Address Hold after End of Write tWZ Write Enable to Output Disable 21 tWHQX tOW Output Active after End of Write Note j: If W is low when E goes low, the outputs remain in the high-impedance state. Note k: E or W must be ≥ VIH during address transitions. Note l: HSB must be high during SRAM WRITE cycles. SRAM WRITE CYCLE #1: W Controlledk, l ADDRESS 12 tAVAV 14 tELWH E 18 tAVWL W 17 tAVWH 13 tWLWH DATA IN DATA OUT 20 tWLQZ PREVIOUS DATA 15 tDVWH DATA VALID HIGH IMPEDANCE SRAM WRITE CYCLE #2: E Controlledk, l ADDRESS E 18 tAVEL 12 tAVAV 14 tELEH STK22C48 STK22C48-25 STK22C48-45 UNITS MIN MAX MIN MAX 20 30 ns 10 15 ns 0 0 ns 20 30 ns 0 0 ns 0 0 ns 10 15 ns 5 5 ns 19 tWHAX 16 tWHDX 21 tWHQX 19 tEHAX W DATA IN DATA OUT 17 tAVEH 13 tWLEH 15 tDVEH DATA VALID HIGH IMPEDANCE 16 tEHDX Document Control #ML0004 Rev 0.3 February 2007 5 5 Page ORDERING INFORMATION STK22C48 - N F 45 I TR STK22C48 Packing Option Blank = Tube TR = Tape and Reel Temperature Range Blank = Commercial (0 to 70°C) I = Industrial (-40 to 85°C) Access Time 25 = 25ns 45 = 45ns Lead Finish F = 100% Sn (Matte Tin) Package N = Plastic 28-pin 300 mil SOIC S = Plastic 28-pin 330 mil SIOC Document Control #ML0004 Rev 0.3 February 2007 11 11 Page

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PDF Descargar	[ Datasheet STK22C48.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
STK22C48	2Kx8 AutoStore nvSRAM	Simtek

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