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| M27W512 Datasheet, PDF (8/16 Pages) STMicroelectronics – 512 Kbit 64Kb x8 Low Voltage UV EPROM and OTP EPROM | |||
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M 27W 512
Table 11. Programming Mode AC Characteristics (1)
(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)
Symbol
Alt
Parameter
Test Condition
Min
tAVEL
tAS Address Valid to Chip Enable Low
2
tQVEL
tDS Input Valid to Chip Enable Low
2
tVCHEL
tVCS VCC High to Chip Enable Low
2
tVPHEL
tOES VPP High to Chip Enable Low
2
tVPLVPH
tPRT VPP Rise Time
50
tELEH
tPW Chip Enable Program Pulse Width (Initial)
95
tEHQX
tDH Chip Enable High to Input Transition
2
tEHVPX
tOEH Chip Enable High to VPP Transition
2
tVPLEL
tVR VPP Low to Chip Enable Low
2
tELQV
tDV Chip Enable Low to Output Valid
tEHQZ (2)
tDFP Chip Enable High to Output Hi-Z
0
tEHAX
tAH Chip Enable High to Address Transition
0
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
Figure 6. MARGIN MODE AC Waveforms
VCC
A8
Max Unit
µs
µs
µs
µs
ns
105
µs
µs
µs
µs
1
µs
130
ns
ns
A9
GVPP
E
A10 Set
tA9HVPH
tVPXA9X
tVPHEL
tEXVPX
tA10HEH
tEXA10X
A10 Reset
Note: A8 High level = 5V; A9 High level = 12V.
tA10LEH
AI00736B
8/16
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