The KM6264B family is fabricated by SAMSUNG's
advanced CMOS process technology. The family
can support various operating temperature ranges
and has various package types for user flexibility of
system design. The family also support low data
retention voltage for battery back-up operations with
low data retention current.
PKG TypeSpeed
Standby(Isb1, Max)
Power Dissipation
Operating(Icc2)
100uA
28-DIP, 28-SOP
28-SOP
10uA
100uA
50uA
55mA
100uA
28-SOP
50uA
FUNCTIONAL BLOCK DIAGRAM
N.C
A12
I/O1
I/O2
I/O3
Vss
A7
A6
A5
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
28-Pin DIP
8
28-Pin SOP
9
10
11
12
13
14
ELECTRONICS
Y-Decoder
Vcc
28
/WE
27
CS2
26
A8
25
A9
24
A11
23
/OE
22
A10
21
/CS1
20
I/O8
19
I/O7
18
I/O6
17
I/O5
16
I/O4
15
A0~A12
1
X-Decoder
I/O1~8
Pin Name
A0~A12
/WE
/CS1, CS2
/OE
I/O1~I/O8
Vcc
Vss
N.C
Cell Array
I/O Buffer
Function
Address Inputs
Write Enable Input
Chip Select Input
Output Enable Input
Data Input/Output
Power(5V)
Ground
No Connection
Access Time : 7=70ns, 10=100ns, 12=120ns
Operating Temperature :
I=Industrial, E=Extended, Blank=Commercial
Package Type : G=SOP, P=DIP,
L-Low Power or Low Low Power, Blank-High Power
Die Version : B=3rd generation
Density : 64=64K bit
Blank=5V
Organization : 2= x8
SEC Standard SRAM
2
Revision. 0.0
Auust. 1996
Page 3
KM6264B Family
ABSOLUTE MAXIMUM RATINGS *
CMOS SRAM
ItemRatings
Voltage on any pin relative to Vss
Voltage on Vcc supply relative to Vss
Power Dissipation
Storage temperature
Operating Temperature
Symbol
Vin, Vout
Vcc
Pd
Tstg
Ta
-0.5 to Vcc+0.5
-0.5 to 7.0
1.0
-65 to 150
0 to 70
-25 to 85
-40 to 85
Soldering temperature and time
* 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.
Tsolder
260 °C, 10sec(Lead Only)
Unit
V
V
W
°C
°C
°C
°C
-
Remark
-
-
-
-
KM6264BL/L-L
KM6264BLE/LE-L
KM6264BLI/LI-L
-
RECOMMENDED DC OPERATING CONDITIONS*
Item
Supply voltage
Ground
Input high voltage
Input low voltage
3) Industrial Product : Ta=-40 to 85 ° C, Vcc=5V+/-10%, unless otherwise specified
** Ta=25 °C
A.C CHARACTERISTICS
TEST CONDITIONS(1. Test Load and Test Input/Output Reference)*
Item
Input pulse level
Input rise fall time
Input and output reference voltage
Output load(See right)
* See test condition of DC and AC Operating characteristics
Value
0.8 to 2.4V
5ns
1.5V
CL=100pF+1TTL
Remark
-
-
-
-
CL*
* Including scope and jig capacitance
ELECTRONICS
4
Revision. 0.0
Auust. 1996
Page 5
KM6264B Family
TEST CONDITIONS(2. Temperature and Vcc Conditions)
CMOS SRAM
Product Family
KM6264BL/L-L
KM6264BLE/LE-L
KM6264BLI/LI-L
* measured with 30pF test load
Temperature
0~70 °C
-25~85 °C
-40~85 °C
Power Supply(Vcc)
PARAMETER LIST FOR EACH SPEED BIN
Read
Write
Parameter List
Read cycle time
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
Write 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
3) Industrial Product : Ta=-40 to 85 ° C, unless otherwise specified
** Ta=25 °C
*** /CS1¡ÃVcc-0.2, CS2¡ÃVcc-0.2(/CS1 Controlled) or CS2 ¡Ã0.2(CS2 Controlled)
tSDR
tRDR
See data retention
waveform
DATA RETENTION TIMING DIAGRAM
1) /CS1 controlled
Vcc
tSDRtRDRData retention mode
L-Ver
LL-Ver
L-Ver
LL-Ver
L-Ver
LL-Ver
Min
2.0
-
-
-
-
-
0
5
Typ**
-
1
0.5
-
-
-
-
-
-
Max
5.5
50
5
50
25
50
25
-
-
Unit
V
uA
ms
4.5V
2.2V
Vdr
/CS1
GND
2) CS2 controlled
Vcc
4.5V
CS2
Vdr
0.4V
GND
tSDR
/CS1¡ÃVcc-0.2V
Data retention mode
tRDR
CS2¡Â0.2V
ELECTRONICS
6
Revision. 0.0
Auust. 1996
Page 7
KM6264B Family
TIMING DIAGRAMS
TIMING WAVEFORM OF READ CYCLE (1) (Address Controlled)
(/CS=/OE=Vil, CS2=/WE=Vih)
tRC
Address
CMOS SRAM
tAA
Data Out
OH
t
Previous Data ValidData Valid
TIMING WAVEFORM OF READ CYCLE(2) (/WE= VIH)
t
RC
Address
t
AA
tCO1
/CS1
CS2
/OE
Data outData Vailid
High - Z
tCO2
t
OE
t
OLZ
t
LZ
t
OH
tHZ(1,2)
t
HZ
tOHZ
Notes(Read Cycle)
1. tHZ and tOHZ are defined as the time at which the outputs achieve the open circuit conditions and are not
referenced to output voltage levels.
2. At any given temperature and voltage condition, tHZ(Max) is less than tLZ(Min) both for a given device and
device to device interconnection.
7
ELECTRONICS
Revision. 0.0
Auust. 1996
Page 8
KM6264B Family
TIMING WAVEFORM OF WRITE CYCLE(1) (/WE Controlled)
t
Address
WC
CMOS SRAM
t
CW(2)
/CS
t
AW
CS2
tCW(2)
t
WP(1)
/WE
t
AS
Data in
t
WHZ
Data out
Data Undefined
TIMING WAVEFORM OF WRITE CYCLE(2) (/CS1 Controlled)
t
WC
Address
t
AS
t
CW(2)
t
DW
Data Vailid
t
WR1(4)
t
DH
t
OW
t
WR1(4)
/CS1
CS2
/WE
Data in
Data out
ELECTRONICS
t
AW
tCO2
t
WP(1)
t
t
DW
DH
Data Vailid
High - ZHigh - Z
8
Revision. 0.0
Auust. 1996
Page 9
KM6264B Family
TIMING WAVEFORM OF WRITE CYCLE(3) (CS2 Controlled)
t
WC
Address
t
tAS(3)
/CS1
CW(2)
t
AW
CMOS SRAM
t
WR2(4)
CS2
/WE
Data in
Data out
Notes(Write Cycle)
1. A write occurs during the overlap of a low /CS1, a high CS2 and a 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 of 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 valid 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.
High - ZHigh - Z
t
CW(2)
t
WP(1)
t
DW
Data Vailid
t
DH
FUNCTIONAL DESCRIPTION
/CS1
H
X
L
L
L
CS2
X
L
H
H
H
* X means don't care
ELECTRONICS
/WE
X
X
H
H
L
/OE
X
X
H
L
X
Mode
Power Down
Power Down
Output Disable
Read
Write
9
I/O Pin
High-Z
High-Z
High-Z
Dout
Din
Current Mode
Isb, Isb1
Isb, Isb1
Icc
Icc
Icc
Revision. 0.0
Auust. 1996
Page 10
KM6264B Family
CMOS SRAM
PACKAGE DIMENSION
28 PIN PLASTIC SMALL OUTLINE PACKAGE (450mil )
0.89
0.035
#28
#1#14
1.27
18.69
0.736
MAX
0.050
18.29 ± 0.20
0.720± 0.008
#15
0.41 ± 0.10
0.016 ± 0.004
8.38 ± 0.20
0.330 ± 0.008
2.59 ± 0.20
0.102 ± 0.008
3.00
MAX
0.118
0.05
0.002
MIN
0.10
0.004
MAX
0 ~ 8°
Unit : Millimeters (Inches)
1.02 ± 0.20
0.040± 0.008
11.81 ± 0.30
0.465 ± 0.012
+ 0.10
0.15
- 0.05
+ 0.004
0.006
- 0.002
28 PIN PLASTIC DUAL INLINE PACKAGE (600mil)
36.72
MAX
1.446
1.65
0.065
#28
#1
2.54
0.100
36.32 ± 0.20
1.430 ± 0.008
0.46 ± 0.10
0.018 ± 0.004
1.52 ± 0.10
0.060 ± 0.004
#15
#14
13.60 ± 0.20
0.535 ± 0.008
3.81 ± 0.20
0.150 ± 0.008
5.08
0.200
3.30 ± 0.30
0.130 ± 0.012
0.38
MIN
0.015
MAX
0.25
0.010
0 ~ 15°
15.24
0.600
+ 0.10
- 0.05
+ 0.004
- 0.002
ELECTRONICS
10
Revision. 0.0
Auust. 1996
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