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W49F002A Datasheet Preview

W49F002A Datasheet

256K x 8 CMOS Flash Memory

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Preliminary W49F002A
256K × 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W49F002A is a 2-megabit, 5-volt only CMOS flash memory organized as 256K × 8 bits. The
device can be programmed and erased in-system with a standard 5V power supply. A 12-volt VPP is
not required. The unique cell architecture of the W49F002A results in fast program/erase operations
with extremely low current consumption (compared to other comparable 5-volt flash memory products).
The device can also be programmed and erased using standard EPROM programmers.
FEATURES
Single 5-volt operations:
5-volt Read
5-volt Erase
5-volt Program
Fast program operation:
Byte-by-byte programming: 35 µS (typ.)
Fast erase operation: 100 mS (typ.)
Fast read access time: 120 nS
Ten-year data retention
Hardware data protection
One 16K byte Boot Block with Lockout
protection
Typical page write (erase/program) cycles:
10 100
Two 8K byte parameter blocks
Two main memory blocks (96K, 128K) Bytes
Low power consumption
Active current: 25 mA (typ.)
Standby current: 20 µA (typ.)
Automatic program and erase timing with
internal VPP generation
End of program or erase detection
Toggle bit
Data polling
Latched address and data
TTL compatible I/O
JEDEC standard byte-wide pinouts
Available packages: 32-pin DIP and PLCC
Publication Release Date: September 12, 2001
- 1 - Revision A1
Free Datasheet http://www.datasheet4u




Winbond

W49F002A Datasheet Preview

W49F002A Datasheet

256K x 8 CMOS Flash Memory

No Preview Available !

PIN CONFIGURATIONS
#RESET
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
Vss
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32-pin
DIP
32 VDD
31 #WE
30 A17
29 A14
28 A13
27 A8
26 A9
25 A11
24 #OE
23 A10
22 #CE
21 DQ7
20 DQ6
19 DQ5
18 DQ4
17 DQ3
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
A AA
111
256
#
R
E
SV # A
E DW 1
TDE7
4 3 2 1 32 31 30
5 29
6 28
7 27
8
32-pin
26
9
PLCC
25
10 24
11 23
12 22
13 21
14 15 16 17 18 19 20
A14
A13
A8
A9
A11
#OE
A10
#CE
DQ7
D DV D D D D
QQs QQQQ
12s 3 4 56
Preliminary W49F002A
BLOCK DIAGRAM
VDD
VSS
#CE
#OE
#WE
#RESET
CONTROL
OUTPUT
BUFFER
DQ0
.
.
DQ7
A0
.
DECODER
.
A17
BOOT BLOCK 3FFFF
16K BYTES 3C000
PARAMETER 3BFFF
BLOCK1
8K BYTES 3A000
PARAMETER 39FFF
BLOCK2
8K BYTES 38000
MAIN MEMORY 37FFF
BLOCK1
96K BYTES
20000
MAIN MEMORY 1FFFF
BLOCK2
128K BYTES 00000
PIN DESCRIPTION
SYMBOL
#RESET
A0A17
DQ0DQ7
#CE
#OE
#WE
VDD
VSS
PIN NAME
Reset
Address Inputs
Data Inputs/Outputs
Chip Enable
Output Enable
Write Enable
Power Supply
Ground
-2-
Free Datasheet http://www.datasheet4u


Part Number W49F002A
Description 256K x 8 CMOS Flash Memory
Maker Winbond
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W49F002A Datasheet PDF






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