K4F641612D-TI500
| Model | K4F641612D-TI500 |
| Description | Fast Page DRAM, 4MX16, 50ns, CMOS, PDSO50, |
| PDF file | Total 35 pages (File size: 381K) |
| Chip Manufacturer | SAMSUNG |
Industrial Temperature
K4F661612D, K4F641612D
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 pow er)
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.
CMOS DRAM
FEATURES
• Part Identification
- K4F661612D-TI/P(3.3V, 8K Ref.)
- K4F641612D-TI/P(3.3V, 4K Ref.)
• Fast Page Mode operation
• 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
•
Active Power Dissipation
Unit : mW
Speed
-45
-50
-60
8K
324
288
252
4K
468
432
396
• LVTTL(3.3V) compatible inputs and outputs
• Early Write or output enable controlled write
• JEDEC Standard pinout
• Available in Plastic TSOP(II) packages
• +3.3V
±0.3V
power supply
•
Industrial Temperature operating
( -40~85
°C
)
•
Refresh Cycles
Part
NO.
K4F661612D*
K4F641612D
Refresh
cycle
8K
4K
Refresh time
Normal
64ms
L-ver
128ms
RAS
UCAS
LCAS
W
Control
Clocks
Vcc
Vss
FUNCTIONAL BLOCK DIAGRAM
VBB Generator
Refresh Control
Refresh Counter
Memory Array
4,194,304 x 16
Cells
Sens e Am ps & I/O
* Access mode & RAS only refresh mode
: 8K cycle/64ms(Normal), 8K cycle/128ms(L-ver.)
CAS -before-RAS & Hidden refresh mode
: 4K cycle/64ms(Normal), 4K cycle/128ms(L-ver.)
Refresh Timer
Row Decoder
Lower
Data in
Buffer
Lower
Data out
Buffer
Upper
Data in
Buffer
Upper
Data out
Buffer
DQ0
to
DQ7
OE
D Q8
to
DQ15
•
Performance Range
Speed
-45
-50
-60
t
RAC
45ns
50ns
60ns
t
CAC
12ns
13ns
15ns
t
RC
80ns
90ns
110ns
t
PC
31ns
35ns
40ns
A0~A12
(A0~A11)*1
A0~A8
(A0~A9)*1
Row Address Buffer
Col. Address Buffer
Column Decoder
Note) *1 : 4K Refresh
SAMSUNG ELECTRONICS CO., LTD.
reserves the right to
change products and specifications without notice.
