28C256ASM-2 查看數據表（PDF） - Turbo IC Inc
零件编号
产品描述 (功能)
生产厂家
28C256ASM-2
Turbo IC Inc
28C256ASM-2 Datasheet PDF : 4 Pages
| |||
Turbo IC, Inc.
28C256A
A.C. WRITE CHARACTERISTICS
PAGE MODE WRITE CHARACTERISTICS
Symbol Parameter
Min
Max
tas Address Set-up Time
20
tah Address Hold Time
100
tcs Write Set-up Time
0
tch Write Hold Time
0
tcw CE Pulse Width
150
twp WE Pulse Width
150
toes OE Set-up Time
20
toeh OE Hold Time
20
tds Data Set-up Time
50
tdh Data Hold Time
0
tdh Data Hold (28C256A-4 ONLY) 10
tblc Byte Load Cycle
0.2
200
tlp Last Byte Loaded to Data
Polling Output
500
twc Write Cycle Time
10
twc Write Cycle Time (IND & MIL)
15
A.C. Write Characteristics WE-Controlled
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
ms
ms
OE
ADDRESS
toes
tas
VALID
tcs
tah
CE
toeh
tch
Symbol Parameter
Min
Max
Unit
twc Write Cycle Time
10
ms
tas
Address Set-up Time
20
ns
tah Address Hold Time
100
ns
tds
Data Set-up Time
50
ns
tdh Data Hold Time
0
ns
twp Write Pulse Width
150
ns
tblc Byte Load Cycle Time
0.2
200
µs
Page Mode Write Wave Form
OE
CE
WE
tas
A0-A5
DATA
tblc
twp
tah
AD-VALID
AD-VALID
AD-VALID
tds
tdh
BYTE-0
BYTE-1
BYTE-2
WE
DATA
HIGH-Z
twp
tblc
tds
tdh
DATA VALID
HIGH-Z
twc
A.C. Write Characteristics CE-Controlled
Chip Clear Wave Form
The content of the 28C256A may be altered to HIGH by the use of the
Chip Clear operation. By setting CE to low, OE to 12 volts, and WE to
low, the entire memory can be cleared (written HIGH) within 20 ms. The
Chip Clear operation is a latch operation mode. After the Chip Clear
starts, the internal chip timer takes over and completes the clear with-
out CE, OE and WE being held active.
OE
ADDRESS
toes
tas
VALID
tcs
tah
WE
toeh
tch
VH
OE
VIH
VIH
CE
VIL
VIH
WE
VIL
ts
tp
th
CE
DATA
HIGH-Z
tcw
tblc
tds
tdh
DATA VALID
HIGH-Z
twc
TURBO IC PRODUCTS AND DOCUMENTS
1. All documents are subject to change without notice. Please contact Turbo IC for the latest
revision of documents.
2. Turbo IC does not assume any responsibility for any damage to the user that may result from
accidents or operation under abnormal conditions.
3. Turbo IC does not assume any responsibility for the use of any circuitry other than what
embodied in a Turbo IC product. No other circuits, patents, licenses are implied.
4. Turbo IC products are not authorized for use in life support systems or other critical systems
where component failure may endanger life. System designers should design with error
detection and correction, redundancy and back-up features.
ts= 20 ns
tp= 200 ns
th= 20 ns
VH=12.0 V±0.5V
Part Numbers & Order Information
28C256APC-2
32K x 8
EEPROM
Package
J -PLCC
P -PDIP
S -SOIC
T -TSOP
Temperature
C -Commercial
I -Industrial
M -Military
Speed
-1 120 ns
-2 150 ns
-3 200 ns
-4 250 ns
Turbo IC, Inc. 2365 Paragon Drive, Suite I, San Jose, CA 95131 Phone: 408-392-0208 Fax: 408-392-0207
See us at www.turbo-ic.com
Rev. 4.0 - 10/28/01
Share Link: