WSF256K8-72CMA [ETC]
256Kx8 SRAM/ FLASH MODULE; 256Kx8 SRAM /闪存模块
| 型号： | WSF256K8-72CMA |
| 厂家： | 
ETC |
| 描述： | 256Kx8 SRAM/ FLASH MODULE |
| 文件： | 总2页 (文件大小：32K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
WSF256K8-XCX
256Kx8 SRAM/ FLASH MODULE ADVANCED*
FEATURES
■ Access Times of 35ns (SRAM) and 70ns (FLASH)
FIG. 1
■ JEDEC Standard, Hermetic Ceramic Package, 32 pin DIP
PIN CONFIGURATION
TOP VIEW
(Package 300)
■ 256Kx8 SRAM
A18
A16
A15
A12
A7
1
32
VCC
2
31 WE
30 A17
29 A14
28 A13
27 A8
■ 256Kx8 5V FLASH
3
■ Memory Map
4
5
Flash Memory: 0H-3FFFFH
SRAM: 40000H-7FFFFH
A6
6
A5
7
26 A9
A4
8
25 A11
24 OE
23 A10
22 CS
21 I/O7
20 I/O6
19 I/O5
18 I/O4
17 I/O3
■ Low Power CMOS
A3
9
■ Commercial, Industrial and Military Temperature Ranges
■ TTL Compatible Inputs and Outputs
A2
10
11
12
13
14
15
16
A1
A0
■ Built-in Decoupling Caps and Multiple Ground Pins for
I/O0
I/O1
I/O2
Low Noise Operation
V
SS
FLASH MEMORY FEATURES
■ 10,000 Erase/Program Cycles
PIN DESCRIPTION
■ Sector Architecture
A0-18
Address Inputs
Data Input/Output
Chip Select
• 8 equal size sectors of 16KBytes each
• Any combination of sectors can be concurrently erased.
Also supports full chip erase
I/O0-7
CS
OE
Output Enable
Write Enable
+5.0V Power
Ground
■ Data Retention, 10 Years at 125°C
WE
VCC
VSS
■ 5 Volt Programming; 5V ± 10% Supply
■ Embedded Erase and Program Algorithms
■ Hardware and Software Write Protection
■ Page Program Operation and Internal Program Control Time
*
This data sheet describes a product that may or may not be under
development and is subject to change or cancellation without notice.
BLOCK DIAGRAM
A0-16
I/O0-7
WE
OE
128K x 8
SRAM
128K x 8
SRAM
128K x 8
Flash
128K x 8
Flash
A17
A18
Decoder
CS
January 1996
1
White Microelectronics • Phoenix, AZ • (602) 437-1520
WSF256K8-XCX
PACKAGE 300: 32 PIN, CERAMIC DIP, SINGLE CAVITY SIDE BRAZED
42.4 (1.670) ± 0.4 (0.016)
15.04 (0.592)
± 0.3 (0.012)
4.34 (0.171) ± 0.79 (0.031)
3.2 (0.125) MIN
PIN 1 IDENTIFIER
0.25 (0.010)
± 0.05 (0.002)
0.84 (0.033)
± 0.4 (0.014)
15.25 (0.600)
2.5 (0.100)
TYP
1.27 (0.050)
± 0.1 (0.005)
0.46 (0.018)
± 0.05 (0.002)
± 0.25 (0.010)
ALL LINEAR DIMENSIONS ARE MILLIMETERS AND PARENTHETICALLY IN INCHES
ORDERING INFORMATION
W S F 256K8 - XXX C X X
LEAD FINISH:
Blank = Gold plated leads
A = Solder dip leads
DEVICE GRADE:
M = Military Screened -55°C to +125°C
I
=
Industrial
-40°C to +85°C
0°C to +70°C
C = Commercial
PACKAGE TYPE:
C = 32 DIP (Package 300)
ACCESS TIME (ns)
37 = 35ns SRAM and 70ns FLASH
72 = 70ns SRAM and 120ns FLASH also available
ORGANIZATION, 256K x 8
Flash PROM
SRAM
WHITE MICROELECTRONICS
White Microelectronics • Phoenix, AZ • (602) 437-1520
2
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