M27C322 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'M27C322' PDF : 24 Pages View PDF
DC and AC parameters
M27C322
Figure 8. Programming and Verify Modes AC Waveforms
A0-A20
Q0-Q15
VCC
GVPP
E
tAVEL
DATA IN
tQVEL
VALID
tEHQX
DATA OUT
tEHAX
tEHQZ
tVCHEL
tEHVPX
tELQV
tVPHEL
tVPLEL
tELEH
PROGRAM
VERIFY
AI02205
1. GVPP High level = 12V.
Table 11. Programming Mode AC Characteristics(1) (2)
Symbol Alt
Parameter
Test
Condition
Min
Max Unit
tAVEL
tQVEL
tVCHEL
tVPHEL
tVPLVPH
tELEH
tAS
tDS
tVCS
tOES
tPRT
tPW
Address Valid to Chip Enable Low
Input Valid to Chip Enable Low
VCC High to Chip Enable Low
VPP High to Chip Enable Low
VPP Rise Time
Chip Enable Program Pulse Width
(Initial)
1
µs
1
µs
2
µs
1
µs
50
ns
45 55 µs
tEHQX
tDH Chip Enable High to Input Transition
2
µs
tEHVPX tOEH Chip Enable High to VPP Transition
2
µs
tVPLEL
tVR VPP Low to Chip Enable Low
1
µs
tELQV
tEHQZ(3)
tDV Chip Enable Low to Output Valid
tDFP Chip Enable High to Output Hi-Z
1
µs
0 130 ns
tEHAX
tAH Chip Enable High to Address Transition
0
ns
1. TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12V ± 0.25V)
2. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
3. Sampled only, not 100% tested.
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