W27E020-70 WINBOND [Winbond], W27E020-70 Datasheet - Page 11

• Manufacturer Part Number: W27E020-70
• Description: 256K X 8 ELECTRICALLY ERASABLE EPROM
• Manufacturer: WINBOND [Winbond]

SMART ERASE ALGORITHM
Increment
Address
No
Chip Erase 100 mS Pulse
Address = First Location
A9 = 14V; A0 = V
Increment X
FFs (HEX)
All Bytes to
Compare
Vpp = 14V
Vcc = 5V
Last
Address?
Vcc = 5V
Vpp = 5V
Pass
Device
Start
X = 0
Erase
Verify
Yes
Pass
Pass
- 11 -
IL
Fail
Fail
Publication Release Date: December 1997
Preliminary W27E020
Yes
No
Fail
Device
X = 20?
Revision A1