The KM681000B family is fabricated by SAMSUNG's advanced
CMOS process technology. The family can support various
operating temperature ranges and have various package types
for user flexibility of system design. The family also support low
data retention voltage for battery back-up operation with low
data retention current.
L-Low Low Power, Blank-Low Power or High Power
Access Time : 5=55ns, 7=70ns, 10=100ns
Operating temperature : Blank=Commerial, I=Industrial, E=Extended,
Package Type : P-DIP, G=SOP, T=TSOP Forward, R=TSOP Reverse
L-Low Power or Low Low Power, Blank-High Power
Die Version : B=3 rd generation
¢¥
Density : 1000=1Mbit
Bank=5V, V=3.0~3.6V, U=2.7~3.3V
Organization : 8=x8
SEC Standard SRAM
Revision 0.3
April 1996
PRELIMINARY
KM681000B FamilyCMOS SRAM
ABSOLUTE MAXIMUM RATINGS*
ItemSymbolRatingsUnitRemark
Voltage on any pin relative to VssVIN,VOUT-0.5 to 7.0VVoltage on Vcc supply relative to VssVCC-0.5 to 7.0VPower DissipationPD1.0WStorage temperatureTSTG-65 to 150
0 to 70
Operating TemperatureTA
Soldering temperature and timeTSOLDER260¡É, 10sec (Lead Only)--
* Stresses 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 operating section of this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
-25 to 85
-40 to 85
¡É
¡É
¡É
¡É
-
KM681000BL/L-L
KM681000BLE/LE-L
KM681000BLI/LI-L
RECOMMENDED DC OPERATING CONDITIONS*
ItemSymbolMinTyp**MaxUnit
Supply voltageVcc4.55.05.5V
GroundVss000V
Input high voltageVIH2.2-Vcc+0.5V
Input low voltageVIL-0.5***-0.8V
2) Extended Product : TA=-25 to 85¡É, unless otherwise specified
3) Industrial Product : TA=-40 to 85¡É, unless otherwise specified
¡É
** TA=25
*** VIL(min)=-3.0V for ¡Â 50ns pulse width
CAPACITANCE* (f=1MHz, TA=25
ItemSymbolTest Condition MinMaxUnit
Input capacitanceCINVin=0V-6pF
¡É
)
Input/Output capacitanceCIOVio=0V-8pF
* Capacitance is sampled not 100% tested
Revision 0.3
April 1996
PRELIMINARY
KM681000B FamilyCMOS SRAM
DC AND OPERATING CHARACTERISTICS
ItemSymbolTest Conditions*MiTyp**MaxUnit
Input leakage currentILIVIN=Vss to Vcc-1-1
Output leakage currentILOCS1=VIH or CS2=VIL or WE=VIL, VIO=Vss to Vcc-1-1
Operating power supply current ICCCS1=VIL, CS2=VIH, VIN=VIH or VIL, IIO=0mA-715**mA
ICC1
Average operating current
ICC2
Output low voltageVOLIOL=2.1mA--0.4V
Output high voltageVOHIOH=-1.0mA2.4--V
Standby Current(TTL)ISBCS1=VIH, CS2=VIL--3mA
Address access time
Chip select to output
Output enable to valid output
Chip select to low-Z output
Output enable to low-Z output
Chip disable to high-Z output
Output disable to high-Z output
Output hold from address change
WriteWrite cycle time
Chip select to end of write
Address set-up time
Address valid to end of write
Write pulse width
Write recovery time
Write to output high-Z
Data to write time overlap
Data hold from write time
End write to output low-Z
2) Extended Product : TA=-25 to 85¡É, unless otherwise specified
2) Industrial Product : TA=-40 to 85¡É, unless otherwise specified
¡É
** TA=25
*** CS1¡ÃVCC-0.2V,CS2¡ÃVCC-0.2V(CS1controlled) or CS2¡Â0.2V(CS2 controlled)
KM681000BLE
KM681000BLE-L
KM681000BLI
KM681000BLI-L
tRDR
tRDR
DATA RETENTION TIMING DIAGRAM
1) CS1 Controlled
tSDR
VCC
4.5V
L-Ver
LL-Ver
Vcc=3.0V
CS1¡ÃVcc-0.2V
See data retention waveform
Data Retention Mode
L-Ver
LL-Ver
L-Ver
LL-Ver
-
-
-
-
-
-
0-5--
1
0.5
-
-
-
-
tRDR
50
10
50
25
50
25
§Ë
ms
2.2V
VDR
CS1
GND
2) CS2 controlled
VCC
4.5V
CS2
VDR
0.4V
GND
tSDR
CS1¡Ã VCC - 0.2V
Data Retention Mode
tRDR
CS2¡Â 0.2V
Revision 0.3
April 1996
PRELIMINARY
KM681000B FamilyCMOS SRAM
TIMMING DIAGRAMS
TIMING WAVEFORM OF READ CYCLE (1) (Address Controlled)
(CS1=OE=VIL, CS2= WE= VIH)
tRC
Address
tAA
tOH
Data Out
Previous Data Valid
Data Valid
TIMING WAVEFORM OF READ CYCLE (WE=VIH)
Address
CS1
CS2
OE
Data out
High-Z
tLZ
tRC
tOH
tAA
tCO1
tCO2
tHZ(1,2)
tOE
tOLZ
tOHZ
Data Valid
NOTES (READ CYCLE)
1.tHZ andtOHZ are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output voltage le vels.
2. At any given temperature and voltage condition, tHZ(max.) is less than tLZ(min.) both for a given device and from device to device.
Revision 0.3
April 1996
PRELIMINARY
KM681000B FamilyCMOS SRAM
TIMING WAVEFORM OF WRITE CYCLE (1) (WE Controlled)
tWC
Address
tWR1(4)
CS1
CS2
WE
tAS(3)
Data in
Data out
Data Undefined
TIMING WAVEFORM OF WRITE CYCLE (2) (CS1 Controlled)
Address
tAS(3)
tWHZ
tCW(2)
tAW
tCW(2)
tWP(1)
tDWtDH
Data Valid
tOW
tWC
tWR1(4)
tCW(2)
CS1
tAW
CS2
tWP(1)
WE
Data in
tDW
Data Valid
tDH
Data outHigh-ZHigh-Z
Revision 0.3
April 1996
PRELIMINARY
KM681000B FamilyCMOS SRAM
TIMING WAVEFORM OF WRITE CYCLE (2) (CS2 Controlled)
tWC
Address
tWR2(4)
tAS(3)
CS1
tCW(2)
tAW
CS2
tCW(2)
tWP(1)
WE
tDH
High-Z
Data in
Data outHigh-Z
tDW
Data Valid
NOTES (WRITE CYCLE)
1. A write occurs during the overlap of low CS1, high CS2 and low WE. A write begins at the latest transition among CS1 going low, CS2 going high and WE
going low. A write ends at the earliest transition among CS1 going high, CS2 going low and WE going high, tWP is measured from the beginning or write
to the end of write.
2. tCW is measured from the later of CS1 going low or CS2 going high to the end of write.
3. tAS is measured from the address calid to the beginning of write.
4. tWR is measured from the end of write to the address change. tWR1 applied in case a write ends at CS1, or WE going high, tWR2 applied in case a write
ends at CS2 going to low.