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IS61C1024ALIS64C1024AL128K x 8 HIGH-SPEED CMOS STATIC RAM
DESCRIPTION
The ISSI IS61C1024AL/IS64C1024AL is a very high-speed, low power, 131,072-word by 8-bit CMOS static RAMs. They are fabricated using ISSI's high-performance CMOS technology. This highly reliable process coupled with innovative circuit design techniques, yields higher performance and low power consumption devices.
When CE1 is HIGH or CE2 is LOW (deselected), the device assumes a standby mode at which the power dissipation can be reduced by using CMOS input levels.
Easy memory expansion is provided by using two Chip Enable inputs, CE1 and CE2. The active LOW Write Enable (WE) controls both writing and reading of the memory.
The IS61C1024AL/IS64C1024AL is available in 32-pin 300-mil SOJ, 32-pin 400-mil SOJ, 32-pin TSOP (Type I, 8x20), and 32-pin sTSOP (Type I, 8 x 13.4) packages.
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 3Rev. E112/01/2017
IS61C1024AL, IS64C1024AL
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Parameter Value Unit Vterm TerminalVoltagewithRespecttoGND –0.5to+7.0 V tstg StorageTemperature –65to+150 °C Pt PowerDissipation 1.5 W Iout DC Output Current (LOW) 20 mA
Notes:1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating con-ditions for extended periods may affect reliability.
CAPACITANCE(1,2)
Symbol Parameter Conditions Max. Unit
cIn Input Capacitance VIn = 0V 5 pF
cout Output Capacitance Vout = 0V 7 pFNotes:1. Tested initially and after any design or process changes that may affect these parameters.2. Test conditions: Ta = 25°c, f=1MHz,VDD=5.0V.
DC ELECTRICAL CHARACTERISTICS (Over Operating Range)
AC TEST CONDITIONS Parameter Unit InputPulseLevel 0Vto3.0V InputRiseandFallTimes 3ns InputandOutputTiming 1.5V and Reference Level OutputLoad SeeFigures1and2
Notes: 1. WE is HIGH for a Read Cycle.2. The device is continuously selected. OE, CE1 = VIl, CE2 = VIh.3. Address is valid prior to or coincident with CE1 LOW and CE2 HIGH transitions.
READ CYCLE NO. 2(1,3)
AC WAVEFORMS
READ CYCLE NO. 1(1,2)
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 7Rev. E112/01/2017
IS61C1024AL, IS64C1024AL
WRITE CYCLE SWITCHING CHARACTERISTICS(1,2) (Over Operating Range, Standard and Low Power)
-12 ns -15 ns Symbol Parameter Min. Max. Min. Max. Unit
outputloadingspecifiedinFigure1.2. The internal write time is defined by the overlap of CE1 LOW, CE2 HIGH and WE LOW. All signals must be in valid states to
initiate a Write, but any one can go inactive to terminate the Write. The Data Input Setup and Hold timing are referenced to the rising or falling edge of the signal that terminates the Write.
3. Tested with OE HIGH.4. TestedwiththeloadinFigure2.Transitionismeasured±500mVfromsteady-statevoltage.Not100%tested.
WRITE CYCLE NO. 2 (OE is HIGH During Write Cycle) (1,2)
DATA UNDEFINED
LOW
t WC
VALID ADDRESS
t PWE1
t AW
t HA
HIGH-Z
t HD
t SA t HZWE
ADDRESS
CE1
WE
DOUT
DIN
OE
DATAIN VALID
t LZWE
t SD
HIGH
CE2
CE2_WR2.eps
Notes: 1. The internal write time is defined by the overlap of CE1 LOW, CE2 HIGH and WE LOW. All signals must be in valid states to
initiate a Write, but any one can go inactive to terminate the Write. The Data Input Setup and Hold timing are referenced to the rising or falling edge of the signal that terminates the Write.
2. I/O will assume the High-Z state if OE = VIh.
DATA UNDEFINED
t WC
VALID ADDRESS
t SCE1t SCE2
t PWE1t PWE2
t AW
t HA
HIGH-Z
t HD
t SA
t HZWE
ADDRESS
CE1
CE2
WE
DOUT
DIN DATAIN VALID
t LZWE
t SD
CE2_WR1.eps
AC WAVEFORMS
WRITE CYCLE NO. 1 (CE1 Controlled, OE is HIGH or LOW) (1 )
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 9Rev. E112/01/2017
IS61C1024AL, IS64C1024AL
WRITE CYCLE NO. 3 (OE is LOW During Write Cycle) (1)
