M27C512
Table 12. Programming Mode AC Characteristics
Symbol
t
AVEL
t
QVEL
t
VCHEL
t
VPHEL
t
VPLVPH
t
ELEH
t
EHQX
t
EHVPX
t
VPLEL
t
ELQV
t
EHQZ (3)
t
EHAX
Alt
t
AS
t
DS
t
VCS
t
OES
t
PRT
t
PW
t
DH
t
OEH
t
VR
t
DV
t
DFP
t
AH
Parameter
Address Valid to Chip Enable Low
Input Valid to Chip Enable Low
V
CC
High to Chip Enable Low
V
PP
High to Chip Enable Low
V
PP
Rise Time
Chip Enable Program Pulse Width (Initial)
Chip Enable High to Input Transition
Chip Enable High to V
PP
Transition
V
PP
Low to Chip Enable Low
Chip Enable Low to Output Valid
Chip Enable High to Output Hi-Z
Chip Enable High to Address Transition
0
0
Test Condition
(1,2)
Min
2
2
2
2
50
95
2
2
2
1
130
105
Max
Unit
µs
µs
µs
µs
ns
µs
µs
µs
µs
µs
ns
ns
Note: 1. T
A
= 25 °C; V
CC
= 6.25V ± 0.25V; V
PP
= 12.75V ± 0.25V
2. V
CC
must be applied simultaneously with or before V
PP
and removed simultaneously or after V
PP
.
3. Sampled only, not 100% tested.
Figure 11. Programming and Verify Modes AC Waveforms
A0-A15
tAVEL
Q0-Q7
tQVEL
VCC
tVCHEL
GVPP
tVPHEL
E
tELEH
PROGRAM
DATA IN
VALID
tEHAX
DATA OUT
tEHQX
tELQV
tEHVPX
tEHQZ
tVPLEL
VERIFY
AI00737
15/22
STMICROELECTRONICS [ STMICROELECTRONICS ]
