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參數資料
| 型號： | W27C257 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | 32K×8bit Electrically Eresable EPROM(32K×8位電可擦除EPROM) |
| 中文描述： | 32K的電Eresable × 8位存儲器（32K的× 8位電可擦除存儲器） |
| 文件頁數： | 1/14頁 |
| 文件大小： | 152K |
| 代理商： | W27C257 |
W27C257
32K
×
8 ELECTRICALLY ERASABLE EPROM
GENERAL DESCRIPTION
Publication Release Date: September 1998
- 1 -
Revision A2
The W27C257 is a high speed, low power Electrically Erasable and Programmable Read Only
Memory organized as 32768
×
8 bits that operates on a single 5 volt power supply. The W27C257
provides an electrical chip erase function. This part was the same EPROM Writer's utilities as the
W27E257.
FEATURES
High speed access time:
100/120 nS (max.)
Read operating current: 30 mA (max.)
Erase/Programming operating current
30 mA (max.)
Standby current: 1 mA (max.)
Single 5V power supply
+14V erase/+12V programming voltage
Fully static operation
All inputs and outputs directly TTL/CMOS
compatible
Three-state outputs
Available packages: 28-pin 600 mil DIP and
32-pin PLCC
PIN CONFIGURATIONS
A6
A5
A4
A3
A2
A1
A0
NC
Q0
5
6
7
8
9
10
11
12
4
4 3 2 1 3
2
3
1
3
0 29
28
27
26
25
24
23
22
21
0
32-pin
PLCC
Q
1
Q
2
N
C
Q
3
Q
4
Q
5
G
N
D
26
25
27
28
1
2
3
4
5
6
7
8
9
10
11
12
13
14
21
20
22
23
24
16
15
17
18
19
Q3
CE
Q7
Q6
Q5
Q4
A9
A11
OE
A10
A14
A13
A8
1
5
1
6
1
7
1
8
1
9
2
GND
Q2
Q1
A0
Q0
A1
A2
A3
A4
A5
A6
A7
A12
V
PP
V
CC
A
7
N
C
A
1
2
V
P
P
A
1
4
A
1
3
V
C
C
A8
A9
A11
NC
OE
A10
CE
Q7
Q6
28-pin
DIP
BLOCK DIAGRAM
CE
OE
CONTROL
OUTPUT
DECODER
CORE
Q0
.
.
Q7
A0
.
.
A14
V
GND
V
PP
CC
PIN DESCRIPTION
SYMBOL
A0
A14
Q0
Q7
CE
OE
V
PP
V
CC
GND
NC
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Enable
Output Enable
Program/Erase Supply Voltage
Power Supply
Ground
No Connection
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| W27C512P-12 | Shielded Paired Cable; Number of Conductors:8; Conductor Size AWG:18; No. Strands x Strand Size:19 x 30; Jacket Material:Polyvinylchloride (PVC); Number of Pairs:4; Leaded Process Compatible:Yes; Voltage Nom.:300V RoHS Compliant: Yes |
| W27C512-70 | 64K X 8 ELECTRICALLY ERASABLE EPROM |
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相關代理商/技術參數 |
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| W27C4096 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 16 ELECTRICALLY ERASABLE EPROM |
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| W27C4096-15 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 16 ELECTRICALLY ERASABLE EPROM |
| W27C4096P-12 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 16 ELECTRICALLY ERASABLE EPROM |
| W27C4096P-15 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 16 ELECTRICALLY ERASABLE EPROM |
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