50 Am49DL640BG March 8, 2002
PRELIMINARY
FLASH AC CHARACTERISTICS
Alternate CE#f Controlled Erase and Program Operations
Notes:
1. Not 100% tested.
2. See the “Flash Erase And Programming Performance” section for more information.
Parameter Speed
JEDEC Std Description 70 85 Unit
t
AVAV
t
WC
Write Cycle Time (Note 1) Min 70 85 ns
t
AVWL
t
AS
Address Setup Time Min 0 ns
t
ELAX
t
AH
Address Hold Time Min 40 45 ns
t
DVEH
t
DS
Data Setup Time Min 40 45 ns
t
EHDX
t
DH
Data Hold Time Min 0 ns
t
GHEL
t
GHEL
Read Recovery Time Before Write
(OE# High to WE# Low)
Min 0 ns
t
WLEL
t
WS
WE# Setup Time Min 0 ns
t
EHWH
t
WH
WE# Hold Time Min 0 ns
t
ELEH
t
CP
CE#f Pulse Width Min 40 45 ns
t
EHEL
t
CPH
CE#f Pulse Width High Min 30 ns
t
WHWH1
t
WHWH1
Progra mming Operation
(Note 2)
Byte Typ 5
µs
Word Ty p 7
t
WHWH1
t
WHWH1
Accelerated Programming Operation,
Word or By te (Note 2)
Typ 4 µs
t
WHWH2
t
WHWH2
Sector Erase Operation (Note 2) Typ 0.4 sec
