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參數資料
| 型號： | AS27C256-20ECAM |
| 廠商： | AUSTIN SEMICONDUCTOR INC |
| 元件分類： | PROM |
| 英文描述： | 32K X 8 UVPROM, 200 ns, CQCC32 |
| 封裝： | 0.450 X 0.550 INCH, CERAMIC, LCC-32 |
| 文件頁數： | 6/13頁 |
| 文件大?。?/td> | 286K |
| 代理商： | AS27C256-20ECAM |
UVEPROM
AS27C256
AS27C256
Rev. 2.0 7/06
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
2
Austin Semiconductor, Inc.
GENERAL DESCRIPTION
The AS27C256 series is a set of 262,144 bit, ultraviolet-light
erasable, electrically programmable read-only
memories.
These devices are fabricated using power-saving CMOS tech-
nology for high speed and simple interface with MOS and bipo-
lar circuits. All inputs (including program data inputs) can be
driven by Series 54 TTL circuits without the use of external
pullup resistors. Each output can drive one Series 54 TTL
circuit without external resistors. The data outputs are 3-state
for connecting multiple devices to a
common bus. The
AS27C256 is pin-compatible with 28-pin 256K ROMs and
EPROMs. It is offered in a 600mil dual-in-line ceramic package
(J suffix) and a 450 x 550 mil ceramic LCC (ECA suffix) rated for
operation from -55°C to 125°C.
Because this EPROM operates from a single 5V supply (in
the read mode), it is ideal for use in microprocessor-based sys-
tems. One other supply (12.75V) is needed for programming.
All programming signals are TTL level. This device is
pro-
grammable by the AMD FLASHRITE Pulse programming algo-
rithm. The FLASHRITE Pulse programming algorithm uses a
V
PP
of 12.75VV and a V
CC
of 6.25V for a nominal programming
time of four seconds. For programming outside the system,
existing EPROM programmers can be used. Locations can be
programmed singly, in blocks, or at random.
FUNCTIONAL BLOCK DIAGRAM*
* This symbol is in accordance with ANSI/IEEE std 91-1984 and IEC Publication 617-12.
A0
A1
A2
A3
A4
A5
DQ0
A6
DQ1
A7
DQ2
A8
DQ3
A9
DQ4
A10
DQ5
A11
DQ6
A12
DQ7
A13
A14
E\
G\
&
10
[PWR DWN]
9
8
7
6
5
4
3
25
24
21
23
2
26
27
20
22
EN
A
11
12
13
15
16
17
18
19
EPROM 32,768 x 8
0
14
A
0
32,767
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AS27C256-20ECAXT | 制造商:AUSTIN 制造商全稱:Austin Semiconductor 功能描述:256K UVEPROM UV Erasable Programmable Read-Only Memory |
| AS27C256-20JI | 制造商:AUSTIN 制造商全稱:Austin Semiconductor 功能描述:256K UVEPROM UV Erasable Programmable Read-Only Memory |
| AS27C256-20JM | 制造商:AUSTIN 制造商全稱:Austin Semiconductor 功能描述:256K UVEPROM UV Erasable Programmable Read-Only Memory |
| AS27C256-20JXT | 制造商:AUSTIN 制造商全稱:Austin Semiconductor 功能描述:256K UVEPROM UV Erasable Programmable Read-Only Memory |
| AS27C256-25/IT | 制造商:Micross Components, Inc. 功能描述:UVEPROM,256KB - Rail/Tube |
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