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M29W400BB Datasheet(PDF) 17 Page - STMicroelectronics

Part No. M29W400BB
Description  4 Mbit (512Kb x8 or 256Kb x16, Boot Block) Low Voltage Single Supply Flash Memory
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M29W400BB Datasheet(HTML) 17 Page - STMicroelectronics

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M29W400BT, M29W400BB
Table 16. Write AC Characteristics, Chip Enable Controlled
(TA = 0 to 70°C or –40 to 85°C)
Note: 1. Sampled only, not 100% tested.
Symbol
Alt
Parameter
M29W400B
Unit
55
70
90 / 120
tAVAV
tWC
Address Valid to Next Address Valid
Min
55
70
90
ns
tWLEL
tWS
Write Enable Low to Chip Enable Low
Min
0
0
0
ns
tELEH
tCP
Chip Enable Low to Chip Enable High
Min
40
45
45
ns
tDVEH
tDS
Input Valid to Chip Enable High
Min
25
30
45
ns
tEHDX
tDH
Chip Enable High to Input Transition
Min
0
0
0
ns
tEHWH
tWH
Chip Enable High to Write Enable High
Min
0
0
0
ns
tEHEL
tCPH
Chip Enable High to Chip Enable Low
Min
30
30
30
ns
tAVEL
tAS
Address Valid to Chip Enable Low
Min
0
0
0
ns
tELAX
tAH
Chip Enable Low to Address Transition
Min
40
45
45
ns
tGHEL
Output Enable High Chip Enable Low
Min
0
0
0
ns
tEHGL
tOEH
Chip Enable High to Output Enable Low
Min
0
0
0
ns
tEHRL
(1)
tBUSY
Program/Erase Valid to RB Low
Max
30
30
35
ns
tVCHWL
tVCS
VCC High to Write Enable Low
Min
505050
µs
Figure 11. Write AC Waveforms, Chip Enable Controlled
AI01870C
E
G
W
A0-A17/
A–1
DQ0-DQ7/
DQ8-DQ15
VALID
VALID
VCC
tVCHWL
tEHWH
tEHEL
tWLEL
tAVEL
tEHGL
tELAX
tEHDX
tAVAV
tDVEH
tELEH
tGHEL
RB
tEHRL


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