DS2250(T)
14 of 18
AC CHARACTERISTICS—PARALLEL PROGRAM LOAD TIMING
(V
CC
= 5V ±5%, T
A
= 0°C to +70°C.)
# PARAMETER SYMBOL MIN MAX UNITS
40 Oscillator Frequency 1/t
CLK
1.0 12.0 MHz
41
Address Setup to
PROG Low
t
AVPRL
0
42
Address Hold after PROG High
t
PRHAV
0
43
Data Setup to PROG Low
t
DVPRL
0
44
Data Hold after PROG High
t
PRHDV
0
45 P2.7, 2.6, 2.5 Setup to V
PP
t
P27HVP
0
46
V
PP
Setup to PROG Low
t
VPHPRL
0
47
V
PP
Hold after PROG Low
t
PRHVPL
0
48
PROG Width Low
t
PRW
2400 t
CLK
49 Data Output from Address Valid t
AVDV
48
1800*
t
CLK
50 Data Output from P2.7 Low t
DVP27L
48
1800*
t
CLK
51 Data Float after P2.7 High t
P27HDZ
0 48
1800*
t
CLK
52
Delay to Reset/ PSEN Active after Power On
t
PORPV
21504 t
CLK
53
Reset/ PSEN Active (or Verify Inactive) to
V
PP
High
t
RAVPH
1200 t
CLK
54 V
PP
Inactive (Between Program Cycles) t
VPPPC
1200 t
CLK
55 Verify Active Time t
VFT
48
2400*
t
CLK
*Second set of numbers refers to expanded memory programming up to 32kbytes.
