PDF STK14EC16 Data sheet ( Hoja de datos )

Número de pieza	STK14EC16
Descripción	256Kx16 AutoStore nvSRAM
Fabricantes	Simtek
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No Preview Available ! Preliminary STK14EC16 256Kx16 AutowSwtwo.DraetaShneevt4SU.cRomAM FEATURES • 15, 25, 45 ns Read Access and R/W Cycle Time • Unlimited Read/Write Endurance • Automatic Non-volatile STORE on Power Loss • Non-Volatile STORE Under Hardware or Software Control • Automatic RECALL to SRAM on Power Up • Unlimited RECALL Cycles • 200K STORE Endurance • 20-Year Non-volatile Data Retention • Single 3.0V +20%, -10% Operation • Commercial, Industrial Temperatures • 44-pin or 54-pin 400-mil TSOPII Packages (RoHS- Compliant) • 48-ball Fine Pitch Ball Grid Array (FBGA) DESCRIPTION The Simtek STK14EC16 is a 4MB fast static RAM with a non-volatile 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 highest performance, most reliable non-volatile memory available. BLOCK DIAGRAM DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 DQ9 DQ10 DQ11 DQ12 DQ13 DQ14 DQ15 A0 A1 A2 A3 A4 A5 A6 A7 A8 A17 EEPROM Array 2048 x 2048 STORE SRAM Array RECALL 2048 x 2048 Column I/O Column Decoder A9 A10 A11 A12 A13 A14 A15 A16 Power Control Store/ Recall Control VCC VCAP HSB Software Detect A0 - A17 G W E UB Pachuco Boys LB This is a product in development that has fixed tar- get specifications that are subject to change pend- ing characterization results. SIMTEK Confidential & Proprietary 1 Document Control #ML0061 Rev 1.1 Jan, 2008 1 page Preliminary AC TEST CONDITIONS Input Pulse Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 3V Input Rise and Fall Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤ 5ns Input and Output Timing Reference Levels . . . . . . . . . . . . . . . 1.5V Output Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Figure 1 and 2 CAPACITANCEb (TA = 25°C, f = 1.0MHz) SYMBOL PARAMETER MAX UNITS CONDITIONS CIN COUT Input Capacitance Output Capacitance 7 7 pF ΔV = 0 to 3V pF ΔV = 0 to 3V Note b: These parameters are guaranteed but not tested. STK14EC16 www.DataSheet4U.com OUTPUT 789 Ohms 3.0V 577 Ohms 30 pF INCLUDING SCOPE AND FIXTURE Figure 1: AC Output Loading OUTPUT 789 Ohms 3.0V 577 Ohms 5 pF INCLUDING SCOPE AND FIXTURE Figure 2: AC Output Loading for Tristate Specs (tHZ, tLZ, tWLQZ, tWHQZ, tGLQX, tGHQZ) Document Control #ML0061 Rev 1.1 Jan, 2008 5 Simtek Confidential 5 Page Preliminary MODE SELECTION STK14EC16 www.DataSheet4U.com EW G, UB, LB A17-A0 Mode I/O Power Notes HX LH LL LH LH LH LH X X Not Selected Output High Z Standby L X Read SRAM Output Data Active X X Write SRAM Input Data Active 0x04E38 Read SRAM Output Data 0x0B1C7 Read SRAM Output Data L 0x083E0 0x07C1F Read SRAM Read SRAM Output Data Output Data Active p,q,r 0x0703F Read SRAM Output Data 0x08B45 AutoStore Disable Output Data 0x04E38 Read SRAM Output Data 0x0B1C7 Read SRAM Output Data L 0x083E0 0x07C1F Read SRAM Read SRAM Output Data Output Data Active p,q,r 0x0703F Read SRAM Output Data 0x04B46 AutoStore Enable Output Data 0x04E38 Read SRAM Output Data 0x0B1C7 Read SRAM Output Data L 0x083E0 Read SRAM Output Data Active p,q,r 0x07C1F Read SRAM Output Data 0x0703F Read SRAM Output Data 0x08FC0 Nonvolatile Store Output High Z ICC2 0x04E38 Read SRAM Output Data 0x0B1C7 Read SRAM Output Data L 0x083E0 0x07C1F Read SRAM Read SRAM Output Data Output Data Active p,q,r 0x0703F Read SRAM Output Data 0x04C63 Nonvolatile Recall Output High Z Note p: The six consecutive addresses must be in the order listed. W must be high during all six consecutive cycles to enable a nonvolatile cycle. Note q: While there are 18 addresses on the STK14EC16, only the lower 16 are used to control software modes Note r: I/O state depends on the state of G, UB, and LB. The I/O table shown assumes G, UB, and LB low. Document Control #ML0061 Rev 1.1 Jan, 2008 11 Simtek Confidential 11 Page

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Número de pieza	Descripción	Fabricantes
STK14EC16	256Kx16 AutoStore nvSRAM	Simtek

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