SAMSUNG KM641003C-20

PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
Document Title
256Kx4 Bit (with OE) High-Speed CMOS Static RAM(5.0V Operating).
Revision History
Preliminary
CCPCCCRCELIMINARY
Rev. No.
History
Draft Data
Rev. 0.0
Initial release with Preliminary.
Aug. 5. 1998
Preliminary
Rev. 1.0
Release to Final Data Sheet.
1.1. Delete Preliminary.
Mar. 3. 1999
Final
Remark
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.
-1-
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
256K x 4 Bit (with OE) High-Speed CMOS Static RAM
FEATURES
GENERAL DESCRIPTION
• Fast Access Time 12,15,20ns(Max.)
• Low Power Dissipation
Standby (TTL)
: 30mA(Max.)
(CMOS) : 5mA(Max.)
Operating KM641003C - 12 : 70mA(Max.)
KM641003C - 15 : 68mA(Max.)
KM641003C - 20 : 65mA(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
• Center Power/Ground Pin Configuration
• Standard Pin Configuration :
KM641003CJ : 32-SOJ-400
The KM641003C is a 1,048,576-bit high-speed Static Random
Access Memory organized as 262,144 words by 4 bits. The
KM641003C uses 4 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 KM641003C is packaged
in a 400 mil 32-pin plastic SOJ.
Preliminary
CCPCCCRCELIMINARY
PIN CONFIGURATION (Top View)
FUNCTIONAL BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
A8
Row Select
Clk Gen.
Pre-Charge Circuit
Memory Array
512 Rows
512x4 Columns
N.C
1
32 A17
A0
2
31 A16
A1
3
30 A15
A2
4
29 A14
A3
5
28 A13
6
27
7
26 I/O4
Vcc
8
Vss
9
24 Vcc
I/O2 10
23 I/O3
WE
11
22 A12
A4
12
21 A11
A5
13
20 A10
A6
14
19
A9
A7
15
18
A8
25 Vss
SOJ
17 N.C
N.C 16
I/O1 ~ I/O4
Data
Cont.
OE
CS
I/O1
I/O Circuit &
Column Select
CLK
Gen.
PIN FUNCTION
A9 A10 A11 A12 A13 A14 A15 A16 A17
Pin Name
A0 - A17
CS
WE
OE
WE
Write Enable
CS
Chip Select
OE
Output Enable
I/O1 ~ I/O 4
-2-
Pin Function
Address Inputs
Data Inputs/Outputs
VCC
Power(+5.0V)
VSS
Ground
N.C
No Connection
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
ABSOLUTE MAXIMUM RATINGS*
Parameter
Voltage on Any Pin Relative to VSS
Symbol
Rating
Unit
VIN, VOUT
-0.5 to Vcc+0.5V
V
Preliminary
CCPCCCRCELIMINARY
Pd
1
Voltage on VCC Supply Relative to VSS
Power Dissipation
Storage Temperature
VCC
-0.5 to 7.0
V
TSTG
-65 to 150
°C
TA
0 to 70
°C
Operating Temperature
W
* 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.
RECOMMENDED DC OPERATING CONDITIONS(TA=0 to 70°C)
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
* VIL(Min) = -2.0V a.c (Pulse Width ≤ 8ns) for I ≤ 20mA.
** V IH(Max) = VCC + 2.0V a.c (Pulse Width ≤ 8ns) for I ≤ 20mA.
DC AND OPERATING CHARACTERISTICS(TA=0 to 70°C, Vcc=5.0V±10%, unless otherwise specified)
Min
Max
Unit
Input Leakage Current
Parameter
Symbol
ILI
VIN=VSS to VCC
Test Conditions
-2
2
µA
Output Leakage Current
ILO
CS=VIH or OE=VIH or WE=VIL
VOUT=VSS to VCC
-2
2
µA
Operating Current
ICC
Min. Cycle, 100% Duty
CS=VIL, VIN=VIH or VIL,
IOUT=0mA
12ns
-
70
mA
15ns
-
68
20ns
-
65
ISB
Min. Cycle, CS=VIH
-
30
ISB1
f=0MHz, CS ≥VCC-0.2V,
VIN≥VCC-0.2V or VIN≤0.2V
-
5
Output Low Voltage Level
VOL
IOL=8mA
-
0.4
V
Output High Voltage Level
VOH
IOH=-4mA
2.4
-
V
-
3.95
V
Standby Current
VOH1*
IOH1=-0.1mA
mA
* VCC=5.0V±5%, Temp.=25°C.
CAPACITANCE*(TA=25°C, f=1.0MHz)
Symbol
Test Conditions
MIN
Max
Unit
Input/Output Capacitance
Item
CI/O
VI/O=0V
-
8
pF
Input Capacitance
CIN
VIN=0V
-
6
pF
* Capacitance is sampled and not 100% tested.
-3-
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
AC CHARACTERISTICS(TA=0 to 70°C, VCC=5.0V±10%, unless otherwise noted.)
TEST CONDITIONS
Parameter
Value
Preliminary
CCPCCCRCELIMINARY
3ns
Input Pulse Levels
0V to 3V
Input Rise and Fall Times
Input and Output timing Reference Levels
1.5V
Output Loads
See below
Output Loads(B)
for tHZ, tLZ, tWHZ, tOW, tOLZ & tOHZ
Output Loads(A)
+5.0V
RL = 50Ω
DOUT
VL = 1.5V
480Ω
DOUT
30pF*
ZO = 50Ω
255Ω
5pF*
* Including Scope and Jig Capacitance
* Capacitive Load consists of all components of the
test environment.
READ CYCLE
Parameter
Symbol
KM641003C-12
KM641003C-15
KM641003C-20
Min
Max
Min
Max
Min
Max
Unit
Read Cycle Time
tRC
12
-
15
-
20
-
ns
Address Access Time
tAA
-
12
-
15
-
20
ns
Chip Select to Output
tCO
-
12
-
15
-
20
ns
Output Enable to Valid Output
tOE
-
6
-
7
-
9
ns
Chip Enable to Low-Z Output
Output Enable to Low-Z Output
Chip Disable to High-Z Output
tLZ
3
-
3
-
3
-
ns
tOLZ
0
-
0
-
0
-
ns
tHZ
0
6
-
7
-
9
ns
Output Disable to High-Z Output
tOHZ
0
6
0
7
0
9
ns
Output Hold from Address Change
tOH
3
-
3
-
3
-
ns
Chip Selection to Power Up Time
tPU
0
-
0
-
0
-
ns
Chip Selection to Power DownTime
tPD
-
12
-
15
-
20
ns
-4-
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
WRITE CYCLE
Parameter
Symbol
KM641003C-12
KM641003C-15
KM641003C-20
Min
Min
Min
Max
Max
Write Cycle Time
tWC
12
Chip Select to End of Write
tCW
8
Address Set-up Time
tAS
0
-
0
-
Address Valid to End of Write
tAW
8
-
9
-
Write Pulse Width(OE High)
tWP
8
-
9
-
Max
Unit
-
ns
-
ns
0
-
ns
10
-
ns
10
-
ns
15
20
Preliminary
CCPCCCRCELIMINARY
9
10
Write Pulse Width(OE Low)
tWP1
12
-
15
-
20
-
ns
Write Recovery Time
tWR
0
-
0
-
0
-
ns
Write to Output High-Z
tWHZ
0
6
0
7
0
9
ns
Data to Write Time Overlap
tDW
6
-
7
-
8
-
ns
Data Hold from Write Time
tDH
0
-
0
-
0
-
ns
End Write to Output Low-Z
tOW
3
-
3
-
3
-
ns
TIMMING DIAGRAMS
TIMING WAVEFORM OF READ CYCLE(1)
(Address Controlled, CS=OE=VIL , WE=VIH)
tRC
Address
tAA
tOH
Data Out
Valid Data
Previous Valid Data
TIMING WAVEFORM OF READ CYCLE(2) (WE=VIH)
tRC
Address
tAA
tCO
CS
tHZ(3,4,5)
tOHZ
tOE
OE
tOH
tOLZ
tLZ(4,5)
Data out
Valid Data
VCC
ICC
Current
ISB
tPU
tPD
50%
50%
-5-
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
NOTES(READ CYCLE)
1. WE is high for read cycle.
2. All read cycle timing is referenced from the last valid address to the first transition address.
3. tHZ and tOHZ are defined as the time at which the outputs achieve the open circuit condition and are not referenced to V OH or
VOL levels.
4. At any given temperature and voltage condition, tHZ(Max.) is less than tLZ(Min.) both for a given device and from device to
device.
5. Transition is measured ±200mV from steady state voltage with Load(B). This parameter is sampled and not 100% tested.
6. Device is continuously selected with CS=VIL.
7. Address valid prior to coincident with CS transition low.
8. For common I/O applications, minimization or elimination of bus contention conditions is necessary during read and write cycle.
Preliminary
CCPCCCRCELIMINARY
TIMING WAVEFORM OF WRITE CYCLE(1) (OE= Clock)
tWC
Address
tWR(5)
tAW
OE
tCW(3)
CS
tWP(2)
tAS(4)
WE
tDW
Data in
High-Z
tDH
Valid Data
tOHZ(6)
High-Z(8)
Data out
TIMING WAVEFORM OF WRITE CYCLE(2)
(OE=Low Fixed)
tWC
Address
tAW
tWR(5)
tCW(3)
CS
tAS(4)
tWP1(2)
WE
tDW
Data in
High-Z
tDH
Valid Data
tWHZ(6)
tOW
High-Z(8)
Data out
-6-
(10)
(9)
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
TIMING WAVEFORM OF WRITE CYCLE(3) (CS=Controlled)
tWC
Address
Preliminary
CCPCCCRCELIMINARY
tAW
tWR(5)
tCW(3)
CS
tWP(2)
tAS(4)
WE
tDW
High-Z
Data in
Valid Data
tLZ
High-Z
tWHZ(6)
High-Z(8)
High-Z
Data out
tDH
NOTES(WRITE CYCLE)
1. All write cycle timing is referenced from the last valid address to the first transition address.
2. A write occurs during the overlap of a low CS and WE. A write begins at the latest transition CS going low and WE going low ;
A write ends at the earliest transition CS going high or WE going high. tWP is measured from the beginning of write to the end of
write.
3. tCW is measured from the later of CS going low to end of write.
4. tAS is measured from the address valid to the beginning of write.
5. tWR is measured from the end of write to the address change. tWR applied in case a write ends as CS or WE going high.
6. If OE, CS and WE are in the Read Mode during this period, the I/O pins are in the output low-Z state. Inputs of opposite phase
of the output must not be applied because bus contention can occur.
7. For common I/O applications, minimization or elimination of bus contention conditions is necessary during read and write cycle.
8. If CS goes low simultaneously with WE going or after WE going low, the outputs remain high impedance state.
9. Dout is the read data of the new address.
10.When CS is low : I/O pins are in the output state. The input signals in the opposite phase leading to the output should not be
applied.
FUNCTIONAL DESCRIPTION
CS
WE
OE
Mode
I/O Pin
Supply Current
H
X
X*
Not Select
High-Z
ISB, ISB1
L
H
H
Output Disable
High-Z
ICC
L
H
L
Read
DOUT
ICC
L
L
X
Write
DIN
ICC
* X means Don′t Care.
-7-
Revision 1.0
March 1999
PRELIMINARY
PRELIMINARY
KM641003C
CMOS SRAM
Units:millimeters/Inches
PACKAGE DIMENSIONS
32-SOJ-400
Preliminary
CCPCCCRCELIMINARY
#17
10.16
0.400
#32
11.18 ±0.12
0.440 ±0.005
9.40 ±0.25
0.370 ±0.010
0.20
#1
#16
0.008
0.69 MIN
0.027
21.36 MAX
0.841
20.95 ±0.12
0.825 ±0.005
( 1.30 )
0.051
( 1.30 )
0.051
( 0.95 )
0.0375
+0.10
-0.05
+0.004
0.017 -0.002
0.43
1.27
0.050
+0.10
-0.05
+0.004
-0.002
0.71
0.028
-8-
3.76 MAX
0.148
0.10
MAX
0.004
+0.10
-0.05
+0.004
-0.002
Revision 1.0
March 1999