HM63921P-35 [ETC]
2048-word x 9-bit CMOS Parallel In-Out FIFO Memory; 2048字×9位CMOS并行输入 - 输出FIFO存储器
| 型号： | HM63921P-35 |
| 厂家： | 
ETC |
| 描述： | 2048-word x 9-bit CMOS Parallel In-Out FIFO Memory |
| 文件： | 总2页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HM63921 Series
2048-word × 9-bit CMOS Parallel In-Out FIFO Memory
The HM63921 is a first-in, first-out memory that
Pin Arrangement
utilizes a high performance static RAM array with
internal algorithm that controls, monitors and
declares status of the memory by empty flag, full
flag and half-full flag, to prevent data overflow or
underflow.
1
28
W
D8
D3
D2
D1
D0
VCC
D4
27
26
25
2
3
4
5
D5
Expansion logic warrants unlimited expansion
capability in width and depth. Both read and write
are independent from each other and their
corresponding pointers are designed to select the
proper locations out of the entire array serially
without address information to load or unload data.
Data is toggled in and out of the device through the
use of the write enable (W) and read enable (R)
pins. The device has a read/write cycle time of
30/35/45 ns. Organization of HM63921 provides a
9-bit data bus. The ninth bit could be used for
control or parity for error checking at the option of
the user. The HM63921 is fabricated using the
Hitachi CMOS 1.3 micron technology. The device
is available in DIP and SOJ.
D6
24
23
22
21
20
19
D7
6
7
8
9
FL/RT
XI
FF
Q0
RS
EF
XO/HF
Q7
Q1
Q2
10
11
Q6
18
17
12
13
14
Q5
Q4
Q3
Q8
16
15
VSS
R
(Top view)
Ordering Information
Features
Type name
Access time
Package
• First-in, first-out dual port memory
• 2 k × 9 organization
• Low-power CMOS 1.3 micron technology
• Asynchronous and simultaneous read and write
• Fully expandable in depth and/or width
• Single 5 V power supply
• Empty and full warning flags
• Half-full flag
• Access time: 22/25/35 ns
–––––––––––––––––––––––––––––––––––––––––
HM63921P-20R 22 ns
–––––––––––––––––––––––––––– plastic DIP
HM63921P-25 25 ns (DP-28NA)
––––––––––––––––––––––––––––
HM63921P-35
300-mil 28-pin
35 ns
–––––––––––––––––––––––––––––––––––––––––
HM63921JP-20R 22 ns
–––––––––––––––––––––––––––– plastic SOJ
HM63921JP-25 25 ns (CP-28DN)
––––––––––––––––––––––––––––
HM63921JP-35
300-mil 28-pin
• Package: 300-mil 28-pin plastic DIP package
300-mil 28-pin plastic SOJ package
35 ns
–––––––––––––––––––––––––––––––––––––––––
1
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