Samsung KM68257ETGI-15, KM68257ETGI-12, KM68257ETGI-10, KM68257ETG-15, KM68257ETG-10 Datasheet
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KM68257E, KM68257EI
CMOS SRAM
PRELIMINARY
Revision 0.0
- 1 -
August 1998
Document Title
32Kx8 Bit High-Speed CMOS Static RAM(5V Operating)
Operated at Commercial and Industrial Temperature Ranges.
Revision History
The attached data sheets are prepared and approved by SAMSUNG Electronics. SAMSUNG Electronics CO., LTD. reserve the
right to change the specifications. SAMSUNG Electronics will evaluate and reply to your requests and questions on the parameters
of this device. If you have any questions, please contact the SAMSUNG branch office near your office, call or contact Headquarters.
Rev .No.
Rev. 0.0
Remark
Preliminary
History
Initial Draft
Draft Data
Aug. 1. 1998
KM68257E, KM68257EI
CMOS SRAM
PRELIMINARY
Revision 0.0
- 2 -
August 1998
PIN FUNCTION
Pin Name Pin Function
A0 - A14 Address Inputs
WE Write Enable
CS Chip Select
OE Output Enable
I/O1 ~ I/O8 Data Inputs/Outputs
VCC Power(+5.0V)
VSS Ground
32K x 8 Bit High-Speed CMOS Static RAM
The KM68257E is a 262,144-bit high-speed Static Random
Access Memory organized as 32,768 words by 8 bits. The
KM68257E uses 8 common input and output lines and has an
output enable pin which operates faster than address access
time at read cycle. The device is fabricated using SAMSUNG′s
advanced CMOS process and designed for high-speed circuit
technology. It is particularly well suited for use in high-density
high-speed system applications. The KM68257E is packaged in
a 300mil 28-pin plastic SOJ or TSOP1 forward.
GENERAL DESCRIPTIONFEATURES
• Fast Access Time 10, 12, 15ns(Max.)
• Low Power Dissipation
Standby (TTL) : 20mA(Max.)
(CMOS) : 2mA(Max.)
Operating KM68257E - 10 : 80mA(Max.)
KM68257E - 12 : 80mA(Max.)
KM68257E - 15 : 80mA(Max.)
• Single 5.0V±10% Power Supply
• TTL Compatible Inputs and Outputs
• I/O Compatible with 3.3V Device
• Fully Static Operation
- No Clock or Refresh required
• Three State Outputs
• Standard Pin Configuration
KM68257EJ : 28-SOJ-300
KM68257ETG : 28-TSOP1-0813. 4F
Clk Gen.
A0
I/O1~I/O8
CS
WE
OE
PIN CONFIGURATION(Top View)
FUNCTIONAL BLOCK DIAGRAM
A1
A2
A3
A4
A5
A6
A7
A8
Row Select
Data
Cont.
A9 A10 A11 A12 A13 A14
CLK
Gen.
Pre-Charge-Circuit
Memory Array
512 Rows
64x8 Columns
SOJ
TSOP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
OE
A11
A9
A8
A13
WE
Vcc
A14
A12
A7
A6
A5
A4
A3
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
Vss
I/O3
I/O2
I/O1
A0
A1
A2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
Vss
Vcc
WE
A13
A8
A9
A11
OE
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
Column Select
I/O Circuit
KM68257E -10/12/15 Commercial Temp.
KM68257EI -10/12/15 Industrial Temp.
ORDERING INFORMATION
KM68257E, KM68257EI
CMOS SRAM
PRELIMINARY
Revision 0.0
- 3 -
August 1998
RECOMMENDED DC OPERATING CONDITIONS(TA=0 to 70°C)
NOTE: The above parameters are also guaranteed at industrial temperature range.
* VIL(Min) = -2.0(Pulse Width≤7ns) for I≤20mA
** VIH(Max) = VCC+2.0V(Pulse Width≤7ns) for I≤20mA
Parameter Symbol Min Typ Max Unit
Supply Voltage VCC 4.5 5.0 5.5 V
Ground VSS 0 0 0 V
Input High Voltage VIH 2.2 - VCC+0.5**
V
Input Low Voltage VIL -0.5* - 0.8
V
DC AND OPERATING CHARACTERISTICS(TA=0 to 70°C,VCC=5.0V±10% unless otherwise specified)
NOTE: The above parameters are also guaranteed at industrial temperature range.
* VCC=5.0V, Temp.=25°C
Parameter Symbol Test Conditions
Min Max
Unit
Input Leakage Current ILI VIN = VSS to VCC -1 1 µA
Output Leakage Current ILO CS=VIH or OE=VIH or WE=VIL
VOUT = VSS to VCC
-1 1 µA
Operating Current ICC Min. Cycle, 100% Duty
CS=VIL, VIN = VIH or VIL,
IOUT=0mA
10ns - 80
mA
12ns - 80
15ns - 80
Standby Current ISB Min. Cycle, CS=VIH - 20 mA
ISB1 f=0MHz, CS≥VCC-0.2V,
VIN≥VCC-0.2V or VIN≤0.2V
- 2
mA
Output Low Voltage Level VOL IOL=8mA - 0.4 V
Output High Voltage Level VOH IOH=-4mA 2.4 - V
VOH1* IOH1=0.1mA - 3.95 V
CAPACITANCE*(TA=25°C, f=1.0MHz)
* NOTE : Capacitance is sampled and not 100% tested.
Item Symbol Test Conditions MIN Max Unit
Input/Output Capacitance CI/O VI/O=0V - 8 pF
Input Capacitance CIN
VIN=0V
- 7 pF
ABSOLUTE MAXIMUM RATINGS*
* 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 sections of this specification is not implied.
Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Parameter Symbol Rating Unit
Voltage on Any Pin Relative to VSS VIN, VOUT -0.5 to 7.0 V
Voltage on VCC Supply Relative to VSS VCC -0.5 to 7.0 V
Power Dissipation PD 1.0
W
Storage Temperature TSTG -65 to 150 °C
Operating Temperature Commercial TA 0 to 70 °C
Industrial TA -40 to 85 °C
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