BRIGHT
Microelectronics
Inc.
Preliminary BM29F040
AC CHARACTERISTICS - for WE Controlled Write Operation
SYMBOL
DESCRIPTION
-75
-90
-120
-150 UNITS
JEDEC
Standard
tWC
tCS
tAVAV
tELWL
tAVWL
tDVWH
tWLWH
tWHEH
tWLAX
tWLWH
tWHWL
Write Cycle Time
Setup
(4)
70
0
90
0
120
0
150
0
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
CE
tAS
Address Setup Time
Data Setup Time
Data Hold Time
0
0
0
0
tDS
30
0
45
0
50
0
55
0
tDH
tCH
Hold Time
0
0
0
0
CE
tAH
Address Hold Time
Write Pulase Width
45
35
20
0
45
45
20
0
50
50
20
0
50
50
25
0
tWP
tWPH
tOES
tOEH
Pulse Width High
WE
Output Enable Setup Time
Output Enable
Hold Time
Read (4)
0
0
0
0
Toggle and Data
Polling
10
10
10
10
tGHWL
tWHWH1
tWHWH2
tGHWL
Read Recover Time Before Write
0
16
1.5
30
50
4
0
16
1.5
30
50
4
0
16
1.5
30
50
4
0
16
1.5
30
50
4
nS
mS
sec
sec
mS
mS
mS
mS
mS
tWHWH1 Programming Operation
tWHWH2 Erase Operation (min.) (1)
typ
max
(4)
tVCS
tVLHT
tWPP1
tWPP2
tCESP
Vcc Setup Time
Voltage Transition Time
Write Pulse Width
Write Pulse Width
(2, 4)
(2)
100
10
4
100
10
4
100
10
4
100
10
4
(2)
(3, 4)
Setup Time to
CE
WE
Active
tOESP
4
4
4
4
mS
Table 12
Notes:
1. The Erase operation does not need programming time.
2. These timings are for Sector Protect/Unprotect operation.
3. This timing is only for sector Unprotect.
4. Not 100% tested.
- 20 -
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