Hardware manual

Rev. 3.0, 09/98, page 260 of 361
Table 14.6. AC Characteristics (cont)
(when V
CC
= 6.0V ±0.25V, V
PP
= 12.5V ±0.3V, Ta = 25°C ±5°C)
Item Symbol Min Typ Max Unit
Measurement
Conditions
OE pulse width for overwrite-
programming
t
OPW
0.19  5.25 ms See figure 14.6
*
V
CC
setup time t
VCS
2 µs
CE setup time t
CES
2 µs
Data output delay time t
OE
0  150 ns
Note: Input pulse level: 0.8V to 2.2V
Input rise/fall time ≤ 20ns
Timing reference levels: input1.0V, 2.0V; output0.8V, 2.0V
Address
Data
V
PP
tAS
VPP
VCC
VCC + 1
V
CC
VCC
CE
PGM
OE
Write
tDS tDH tDF
tAH
tPW tOEtOES
tOPW
tVPS
tVCS
tCES
Input data Output data
Verify
Figure 14.6 PROM Write/Verify Timing