w39l040a Winbond Electronics Corp America, w39l040a Datasheet - Page 3

• Manufacturer Part Number: w39l040a
• Description: 512k ? 8 Cmos Flash Memory
• Manufacturer: Winbond Electronics Corp America

1. GENERAL DESCRIPTION
The W39L040A is a 4Mbit, 3V/3.3V CMOS flash memory organized as 512K × 8 bits. For flexible
erase capability, the 4Mbits of data are divided into 8 uniform sectors of 64 Kbytes. The byte-wide (×
8) data appears on DQ7 − DQ0. The device can be programmed and erased in-system with a
standard 3.3V power supply. A 12-volt V
W39L040A results in fast program/erase operations with extremely low current consumption
(compared to other comparable 3.3-volt flash memory products). The device can also be programmed
and erased by using standard EPROM programmers.
2. FEATURES
•
•
•
•
•
•
3V/3.3-Volt Read/Erase/Program Operations
− 3.0 ~ 3.6V for 70nS
− 2.7 ~ 3.6V for 90nS
Fast Program operation:
− Byte-by-Byte programming: 9 μS (typ.)
Fast Erase operation:
− Chip Erase cycle time: 6 S (typ.)
− Sector Erase cycle time: 0.7 S (typ.)
Read access time: 70/90 nS
8 Even sectors with 64K bytes
Any individual sector can be erased
PP
is not required. The unique cell architecture of the
- 3 -
•
•
•
•
•
•
Typical program/erase cycles: 10K
Twenty-year data retention
Low power consumption
− Active read current: 7 mA at 5MHz (typ.)
− Active program/erase current: 15 mA at
End of program detection
− Software method: Toggle bit/#Data polling
JEDEC standard byte-wide pinouts
Available packages: 32-pin PLCC Lead free,
32-pin STSOP (8 x 14 mm) Lead free, 32-pin
PDIP and 32-pin TSOP (8 x 20 mm)
− Standby current: 0.2 μA (typ.)
5MHz (typ.)
Publication Release Date: April 14, 2005
W39L040A
Revision A3