KM48C512D, KM48V512D
CMOS DRAM
512K x 8Bit CMOS Dynamic RAM with Fast Page Mode
DESCRIPTION
This is a family of 524,288 x 8 bit Fast Page Mode CMOS DRAMs. Fast Page Mode offers high speed random access of memory cells
within the same row. Power supply voltage(+5.0V or +3.3V), Access time(-5,-6,-7), power consumption(Normal or Low power) and
package type(SOJ or TSOP-II) are optional features of this family. All of this family have CAS-before-RAS refresh, RAS-only refresh and
Hidden refresh capabilities. Furthermore, Self-refresh operation is available in L-version. This 512Kx8 Fast Page Mode DRAM family is
fabricated using Samsung′s advanced CMOS process to realize high band-width, low power consumption and high reliability.
It may be used as main memory unit for microcomputer, personal computer and portable machines.
• Fast Page Mode operation
FEATURES
• Byte Read/Write operation
• CAS-before-RAS refresh capability
• Part Identification
• RAS-only and Hidden refresh capability
- KM48C512D/DL (5V, 1K Ref.)
- KM48V512D/DL (3.3V, 1K Ref.)
• Self-refresh capability (L-ver only)
• TTL(5V)/LVTTL(3.3V) compatible inputs and outputs
• Early Write or output enable controlled write
• Active Power Dissipation
• JEDEC Standard pinout
Unit : mW
Speed
3.3V (1K Ref.)
-5
-
470
-6
255
385
-7
235
• Available in 28-pin SOJ 400mil & TSOP(II) 400mil
5V (1K Ref.)
360
packages
• Dual +5V±10% power supply(5V product)
• Dual +3.3V±0.3V power supply(3.3V product)
FUNCTIONAL BLOCK DIAGRAM
• Refresh Cycles
VCC
C512D
5V
V512D
Refresh
cycle
Refresh period
3.3V
Normal
1K
16ms
L-ver
128ms
RAS
CAS
W
Control
Clocks
Refresh Timer
• Performance Range
Speed
tRAC
tCAC
tRC
tPC
Remark
50ns
15ns
90ns
35ns
5V Only
Refresh Counter
-6
60ns
15ns
110ns
40ns
5V/3.3V
-7
70ns
20ns
130ns
45ns
5V/3.3V
A0 - A9
A0 - A8
Memory Array
524,288 x8
Cells
Row Address Buffer
Col. Address Buffer
Data in
Buffer
Row Decoder
Refresh Control
-5
Vcc
Vss
VBB Generator
Column Decoder
SAMSUNG ELECTRONICS CO., LTD. reserves the right to
change products and specifications without notice.
Sense Amps & I/O
Part
NO.
DQ0
to
DQ7
Data out
Buffer
OE
