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