Industrial Temperature
K4F661612D,K4F641612D
CMOS DRAM
4M x 16bit CMOS Dynamic RAM with Fast Page Mode
DESCRIPTION
This is a family of 4,194,304 x 16 bit Fast Page Mode CMOS DRAMs. Fast Page Mode offers high speed random access of memory
cells within the same row. Refresh cycle(4K Ref. or 8K Ref.), access time (-45, -50 or -60), power consumption(Normal or Low power)
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 4Mx16 Fast Page Mode DRAM family is fabricated using Samsung¢s
advanced CMOS process to realize high band-width, low power consumption and high reliability.
FEATURES
• Fast Page Mode operation
• Part Identification
• 2CAS Byte/Word Read/Write operation
• CAS-before-RAS refresh capability
• RAS-only and Hidden refresh capability
• Self-refresh capability (L-ver only)
• Fast parallel test mode capability
• LVTTL(3.3V) compatible inputs and outputs
• Early Write or output enable controlled write
• JEDEC Standard pinout
- K4F661612D-TI/P(3.3V, 8K Ref.)
- K4F641612D-TI/P(3.3V, 4K Ref.)
• ActivePowerDissipation
Unit : mW
Speed
-45
8K
4K
• Available in Plastic TSOP(II) packages
• +3.3V ±0.3V power supply
324
288
252
468
432
396
-50
•
Industrial Temperature operating ( -40~85°C )
-60
• Refresh Cycles
Part
NO.
Refresh
cycle
Refresh time
FUNCTIONAL BLOCK DIAGRAM
Normal
64ms
L-ver
K4F661612D*
K4F641612D
8K
4K
RAS
UCAS
LCAS
W
128ms
Vcc
Control
Vss
Clocks
VBB Generator
* Access mode & RAS only refresh mode
: 8K cycle/64ms(Normal), 8K cycle/128ms(L-ver.)
CAS -before-RAS & Hidden refresh mode
Lower
Data in
Buffer
DQ0
to
DQ7
Row Decoder
Refresh Timer
Refresh Control
Lower
Data out
Buffer
: 4K cycle/64ms(Normal), 4K cycle/128ms(L-ver.)
Memory Array
4,194,304 x 16
Cells
OE
Refresh Counter
Row Address Buffer
Col. Address Buffer
Upper
Data in
Buffer
• Performance Range
DQ8
to
DQ15
Speed
-45
tRAC
45ns
50ns
60ns
tCAC
12ns
13ns
15ns
tRC
tPC
A0~A12
(A0~A11)*1
Upper
Data out
Buffer
80ns
90ns
110ns
31ns
35ns
40ns
A0~A8
(A0~A9)*1
Column Decoder
-50
-60
Note) *1 : 4K Refresh
SAMSUNG ELECTRONICS CO., LTD. reserves the right to
change products and specifications without notice.