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M29W400BB Datasheet(PDF) 16 Page - STMicroelectronics

Part No. M29W400BB
Description  4 Mbit (512Kb x8 or 256Kb x16, Boot Block) Low Voltage Single Supply Flash Memory
Download  25 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M29W400BB Datasheet(HTML) 16 Page - STMicroelectronics

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Figure 10. Write AC Waveforms, Write Enable Controlled
AI01869C
E
G
W
A0-A17/
A–1
DQ0-DQ7/
DQ8-DQ15
VALID
VALID
VCC
tVCHEL
tWHEH
tWHWL
tELWL
tAVWL
tWHGL
tWLAX
tWHDX
tAVAV
tDVWH
tWLWH
tGHWL
RB
tWHRL
Table 15. Write AC Characteristics, Write 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
tELWL
tCS
Chip Enable Low to Write Enable Low
Min
0
0
0
ns
tWLWH
tWP
Write Enable Low to Write Enable High
Min
40
45
45
ns
tDVWH
tDS
Input Valid to Write Enable High
Min
25
30
45
ns
tWHDX
tDH
Write Enable High to Input Transition
Min
0
0
0
ns
tWHEH
tCH
Write Enable High to Chip Enable High
Min
0
0
0
ns
tWHWL
tWPH
Write Enable High to Write Enable Low
Min
30
30
30
ns
tAVWL
tAS
Address Valid to Write Enable Low
Min
0
0
0
ns
tWLAX
tAH
Write Enable Low to Address Transition
Min
40
45
45
ns
tGHWL
Output Enable High to Write Enable Low
Min
0
0
0
ns
tWHGL
tOEH
Write Enable High to Output Enable Low
Min
0
0
0
ns
tWHRL
(1)
tBUSY
Program/Erase Valid to RB Low
Max
30
30
35
ns
tVCHEL
tVCS
VCC High to Chip Enable Low
Min
505050
µs


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