DS2064 ,8K x 8 Static RAMFEATURES PIN ASSIGNMENT• Low power CMOS designNC 1 28 VCC• Standby current2 27A12 WE50 nA max at t ..
DS2065W-100# ,3.3V Single-Piece 8Mb Nonvolatile SRAMApplicationsRAID Systems and Servers POS TerminalsIndustrial Controllers Routers/SwitchesPin Config ..
DS2105 ,SCSI TerminatorFUNCTIONAL DESCRIPTIONThe DS2105 consists of a bandgap reference, buffernal 50KW pull–up resistor. ..
DS2108S ,Differential SCSI Switchable TerminatorFUNCTIONAL DESCRIPTIONThe DS2108 consists of power-down circuitry, eighteen 330-ohm and nine 150-oh ..
DS2108S/T&R ,Differential SCSI Switchable TerminatorFEATURES PIN ASSIGNMENT Fully compliant with SCSI, SCSI-2 and SCSI-3 standards1 24TPWR PD Conform ..
DS2109 ,Plug and Play SCSI TerminatorFUNCTIONAL DESCRIPTIONSCSI–2 (X3.131–1994) The DS2109 is designed to be a single chip terminationSC ..
DS2064
8K x 8 Static RAM
DS20648K x 8 Static RAM
DS2064
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FEATURESLow power CMOS designStandby current
50 nA max attA = 25°CVCC = 3.0V
100 nA max attA = 25°CVCC = 5.5V
1 μA max attA = 60°CVCC = 5.5VFull operation for VCC = 4.5V to 5.5VData Retention Voltage = 5.5V to 2.0VAccess time equals 200 ns at 5.0VOperating temperature range of –40°C to +85°CFull static operationTTL compatible inputs and outputsAvailable in 28–pin DIP and 28–pin SOIC packagesSuitable for both battery operated and battery backup
applications
PIN ASSIGNMENTVCC
CE2
A11
A10
CE1
DQ7
DQ6
DQ5
DQ4
DQ3
A12
DQ0
DQ1
DQ2
GND
DS2064–200 28–PIN DIP (600 MIL)
DS2064S–200 28–PIN SOIC (330 MIL)
PIN DESCRIPTIONA0–A12–Address Inputs
DQ0–DQ7–Data Input/Output
CE1, CE2–Chip Enable Inputs–Write Enable Input–Output Enable Input
VCC–5V Power Supply Input
GND–Ground–No Connection
DESCRIPTIONThe DS2064 is a 65536–bit low power, fully static ran-
dom access memory organized as 8192 words by eight
bits using CMOS technology. The device operates from
a single power supply with a voltage input between 4.5V
and 5.5V. The chip enable inputs (CE1 and CE2) are
used for device selection and can be used in order to
achieve the minimum standby current mode, which fa-
cilitates both battery operate and battery backup appli-
cations. The device provides fast access time of 200 ns
and is most suitable for low power applications where
battery operation or battery backup for nonvolatility are
required. The DS2064 is a JEDEC–standard 8K x 8
SRAM and is pin–compatible with ROM and EPROM of
similar density.
DS2064
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ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS (tA = –40°C to +85°C)
DC CHARACTERISTICS(tA = –40°C to +85°C; VCC=5V ± 10%)
CAPACITANCE(tA = 25°C)
DS2064
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AC CHARACTERISTICS, READ CYCLE(tA = –40°C to +85°C; VCC=5V ± 10%)
AC CHARACTERISTICS, WRITE CYCLE(tA = –40°C to +85°C; VCC=5V ± 10%)
TIMING DIAGRAM: READ CYCLEDOUT
ADDRESSESCE
SEE NOTE 1
DS2064
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TIMING DIAGRAM: WRITE CYCLE 1ADDRESSES
DOUT
DIN
SEE NOTES 2, 3, 4, 5, 6 AND 7
DS2064
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TIMING DIAGRAM: WRITE CYCLE 2ADDRESSES
DOUT
DIN
SEE NOTES 2, 3, 4, 5, 6 AND 7
TIMING DIAGRAM: DATA RETENTION – POWER UP, POWER DOWNVCC - 0.2V
VCC
GND
VIL
SEE NOTE 8
DS2064
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DATA RETENTION CHARACTERISTICS(tA=–40°C to +85°C)
* Typical values are at 25°C
FUNCTION TABLE
