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M29W800AT Datasheet(PDF) 20 Page - STMicroelectronics

Part No. M29W800AT
Description  8 Mbit 1Mb x8 or 512Kb x16, Boot Block Low Voltage Single Supply Flash Memory
Download  33 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M29W800AT Datasheet(HTML) 20 Page - STMicroelectronics

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M29W800AT, M29W800AB
20/33
Table 19. Write AC Characteristics, E Controlled
(TA = 0 to 70°C, –20 to 85°C or –40 to 85°C)
Note: 1. Sampled only, not 100% tested.
2. This timing is for Temporary Block Unprotection operation.
Symbol
Alt
Parameter
M29W800AT / M29W800AB
Unit
80
90
VCC = 3.0V to 3.6V
CL = 30pF
VCC = 3.0V to 3.6V
CL = 30pF
Min
Max
Min
Max
tAVAV
tWC
Address Valid to Next Address Valid
80
90
ns
tAVEL
tAS
Address Valid to Chip Enable Low
0
0
ns
tDVEH
tDS
Input Valid to Chip Enable High
35
45
ns
tEHDX
tDH
Chip Enable High to Input Transition
0
0
ns
tEHEL
tCPH
Chip Enable High to Chip Enable Low
30
30
ns
tEHGL
tOEH
Chip Enable High to Output Enable Low
0
0
ns
tEHRL
(1)
tBUSY
Program Erase Valid to RB Delay
80
90
ns
tEHWH
tWH
Chip Enable High to Write Enable High
0
0
ns
tELAX
tAH
Chip Enable Low to Address Transition
45
45
ns
tELEH
tCP
Chip Enable Low to Chip Enable High
35
35
ns
tGHEL
Output Enable High Chip Enable Low
0
0
ns
tPHPHH
(1, 2)
tVIDR
RP Rise TIme to VID
500
500
ns
tPHWL
(1)
tRSP
RP High to Write Enable Low
4
4
µs
tPLPX
tRP
RP Pulse Width
500
500
ns
tVCHWL
tVCS
VCC High to Write Enable Low
50
50
µs
tWLEL
tWS
Write Enable Low to Chip Enable Low
0
0
ns
POWER SUPPLY
Power Up
The memory Command Interface is reset on pow-
er up to Read Array. The device does not accept
commands on the first rising edge of W, if both W
and E are at VIL with G at VIH during power-up.
Any write cycle initiation is blocked when VCC is
below VLKO.
Supply Rails
Normal precautions must be taken for supply volt-
age decoupling; each device in a system should
have the VCC rail decoupled with a 0.1µF capacitor
close to the VCC and VSS pins. The PCB trace
widths should be sufficient to carry the VCC pro-
gram and erase currents required.


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