Rainbow Electronics W49F020 User Manual
Rainbow Electronics Storage
Preliminary W49F020
256K
×
8 CMOS FLASH MEMORY
Publication Release Date: October 1999
- 1 -
Revision A1
GENERAL DESCRIPTION
The W49F020 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 V
PP
is not
required. The unique cell architecture of the W49F020 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: 50
µ
S (max.)
•
Fast Erase operation: 100 mS (typ.)
•
Fast Read access time: 70/90 nS
•
Endurance: 1K/10K cycles (typ.)
•
Twenty-year data retention
•
Hardware data protection
•
One 8K byte Boot Block with Lockout
protection
•
Low power consumption
−
Active current: 25 mA (typ.)
−
Standby current: 20
µ
A (typ.)
•
Automatic program and erase timing with
internal
V
PP
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 32-pin
TSOP and 32-pin-PLCC