BRIGHT
Microelectronics
Inc.
Preliminary BM29F400T/BM29F400B
AC CHARACTERISTICS
Programming/Erase Operations
PARAMETER
JEDEC
SYM.
DESCRIPTION
Standard
-90
90
0
-120
120
0
-150
150
0
Unit
nS
nS
nS
nS
nS
nS
nS
nS
(1)
Write Cycle Time
t
t
t
t
t
t
Min.
Min.
Min.
Min.
Min.
Min.
Min.
Min.
AVAV
AVEL
ELAX
DVEH
EHDX
WC
t
t
t
Address Setup Time
Address Hold Time
Data Setup Time
AS
AH
DS
45
45
0
50
50
0
50
50
0
t
Data Hold Time
DH
(1)
t
t
Output Enable Setup Time
0
0
0
OES
OEH
(1)
Read
Output Enable
Hold Time
0
0
0
10
10
10
(1)
Polling
Toggle and
Data
t
t
t
Read Recover Time Before Write
WE Setup Time
Min.
Min.
0
0
0
0
0
0
nS
nS
GHWL
GHWL
t
WLEL
WS
t
t
t
t
t
t
t
t
Min.
Min.
Min.
0
0
0
nS
nS
nS
EHWH
WH
WE Hold Time
45
20
50
20
50
20
ELEH
CP
Pulse Width
CE
CE
EHEL
CPH
WHWH1
Pulse Width High
Byte Programming Operation
Typ.
Max.
Typ.
Max.
Typ.
Max.
Min.
Min.
Min.
Min.
Min.
Min.
16
400
0.26
12
16
400
0.26
12
16
400
0.26
12
mS
mS
sec
sec
sec
sec
mS
nS
WHWH1
(2)
Sector Erase Operation
t
t
t
WHWH2
WHWH3
WHWH2
WHWH3
(2)
Chip Erase Operation
t
2.0
90
2.0
90
2.0
90
(1,3)
Vcc Setup Time
t
t
t
t
t
t
50
50
50
VCS
Rise Time to VID(1,3)
500
4
500
4
500
4
VIDR
VLHT
WPP1
WPP2
OESP
(1,3)
Voltage Transition Time
mS
mS
mS
mS
(4)
Sector Protect Write Pulse Width
100
10
100
10
100
10
(4)
Sector Unprotect Write Pulse Width
4
4
4
(1, 3)
OE Setup Time to WE Active
OE Setup Time to WE Active
t
Min.
4
4
4
nS
CSP
(1, 4)
Notes:
1. Not 100% tested.
2. Does not include pre-programming time.
3. This timing is for Sector Unprotect operation.
4. Output Driver Disable Time.
- 32 -
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