M29F400 データシートの表示（PDF） - STMicroelectronics
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M29F400 Datasheet PDF : 40 Pages
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M29F400BT, M29F400BB
DC and AC parameters
Figure 10. Write AC waveforms, Chip Enable controlled
A0-A17/
A–1
W
G
E
tAVEL
tWLEL
tGHEL
tAVAV
VALID
tELAX
tELEH
DQ0-DQ7/
DQ8-DQ15
tDVEH
VALID
tEHWH
tEHGL
tEHEL
tEHDX
VCC
RB
tVCHWL
tEHRL
AI01870C
Table 14. Write AC characteristics, Chip Enable controlled(1)
Symbol Alt
Parameter
M29F400B
Unit
45 55 70 / 90
tAVAV tWC Address Valid to Next Address Valid
Min 45 55 70 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
40
45 ns
tDVEH tDS Input Valid to Chip Enable High
Min 25
25
30 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 20
20
20 ns
tAVEL
tAS Address Valid to Chip Enable Low
Min 0
0
0 ns
tELAX
tAH Chip Enable Low to Address Transition
Min 40
40
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(2) tBUSY Program/Erase Valid to RB Low
Max 30 30 30 ns
tVCHWL tVCS VCC High to Write Enable Low
Min 50
50
50 µs
1. TA = 0 to 70 °C, –40 to 85 °C or –40 to 125 °C
2. Sampled only, not 100% tested.
33/40
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