m29w400db STMicroelectronics, m29w400db Datasheet - Page 32

• Manufacturer Part Number: m29w400db
• Description: 4 Mbit 512kb X8 Or 256kb X16, Boot Block 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

DC and AC parameters
Figure 12. Write AC waveforms, Write Enable controlled
Table 13.
1. Sampled only, not 100% tested.
32/48
Symbol
t
WHRL
t
t
t
t
t
t
t
t
t
t
t
VCHEL
WHWL
t
WLWH
WHDX
WHEH
DVWH
GHWL
WHGL
AVWL
WLAX
ELWL
AVAV
(1)
A0-A17/
A–1
E
G
W
DQ0-DQ7/
DQ8-DQ15
V CC
RB
Write AC characteristics, Write Enable controlled
t
t
t
BUSY
t
t
t
WPH
t
t
OEH
Alt
t
t
t
t
VCS
WC
WP
CS
DS
DH
CH
AH
AS
Address Valid to Next Address Valid
Chip Enable Low to Write Enable Low
Write Enable Low to Write Enable High
Input Valid to Write Enable High
Write Enable High to Input Transition
Write Enable High to Chip Enable High
Write Enable High to Write Enable Low
Address Valid to Write Enable Low
Write Enable Low to Address Transition
Output Enable High to Write Enable Low
Write Enable High to Output Enable Low
Program/Erase Valid to RB Low
V
CC
tVCHEL
High to Chip Enable Low
tELWL
tGHWL
tAVWL
Parameter
tAVAV
VALID
tWLWH
tDVWH
tWHRL
VALID
tWLAX
Max
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
tWHEH
tWHGL
tWHWL
M29W400DT, M29W400DB
tWHDX
45
45
30
25
30
40
30
50
0
0
0
0
0
0
M29W400D
55
55
30
30
30
45
30
50
0
0
0
0
0
0
AI01869C
70
70
30
45
30
45
35
50
0
0
0
0
0
0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs