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參數資料
| 型號： | HYMR1848-745 |
| 廠商： | HYNIX SEMICONDUCTOR INC |
| 元件分類： | DRAM |
| 英文描述： | 48M X 18 RAMBUS MODULE, DMA84 |
| 封裝： | RIMM-184 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 112K |
| 代理商： | HYMR1848-745 |
Rev.0.2 / Jan. 99
1
Overview
The Direct Rambus RIMM module is a general purpose
high-performance memory subsystem suitable for use in a
broad range of applications including computer memory,
personal computers, workstations, and other applications
where high bandwidth and low latency are required.
The 96 MB Direct Rambus RIMM module consists of
twelve 64M Direct Rambus DRAM (Direct RDRAM )
devices. These are extremely high-speed CMOS DRAMs
organized as 4M words by 16 or 18 bits. The use of Rambus
Signaling Level (RSL) technology permits 600MHz /
711MHz / 800MHz transfer rates while using conventional
system and board design technologies. Direct RDRAM
devices are capable of sustained data transfers at 1.25 ns per
two bytes (10ns per sixteen bytes).
The architecture of the Direct RDRAM allows the highest
sustained bandwidth for multiple, simultaneous randomly
addressed memory transactions. The separate control and
data buses with independent row and column control yield
over 95% bus efficiency. The Direct RDRAM's sixteen
banks support up to four simultaneous transactions.
Features
184-pin 1mm pin spacing
Card Size: 133.35mm x 31.75mm x 1.27mm
(5.25” x 1.25” x 0.050”)
96 MB Direct RDRAM storage
Each RDRAM has 16 banks, for 192 banks total on
module
Gold plated contacts
RDRAMs use Chip Scale Package (CSP)
Serial Presence Detect support
Operates from a 2.5 volt supply (
±5%)
Low power and powerdown self refresh modes
Separate Row and Column buses for higher efficiency
Key Timing Parameters/Part Numbers
The following table lists the frequency and latency bins
available from RIMM modules. An optional -LP designator
is used to indicate low power modules.
Form Factor
The Direct Rambus RIMM modules are offered in a 184-pin
1mm pin pitch form factor suitable for desktop and other
system applications.
Organization
I/O Freq.
MHz
trac (Row Access
Time) ns
Part
Number
48M x 16
600
53
HYMR1648-653
48M x 16
711
50
HYMR1648-750
48M x 16
711
45
HYMR1648-745
48M x 16
800
45
HYMR1648-845
48M x 16
800
40
HYMR1648-840
48M x 18
600
53
HYMR1848-653
48M x 18
711
50
HYMR1848-750
48M x 18
711
45
HYMR1848-745
48M x 18
800
45
HYMR1848-845
48M x 18
800
40
HYMR1848-840
Direct Rambus RIMM Module
96MBytes (48M x 16/18) based on 4Mx16/18 RDRAM
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