CAT28F020 CATALYST [Catalyst Semiconductor], CAT28F020 Datasheet - Page 6

• Manufacturer Part Number: CAT28F020
• Description: 2 Megabit CMOS Flash Memory
• Manufacturer: CATALYST [Catalyst Semiconductor]

Note:
(1) Please refer to Supply characteristics for the value of V
(2) Program and Erase operations are controlled by internal stop timers.
(3) ‘Typicals’ are not guaranteed, but based on characterization data. Data taken at 25 C, 12.0V V
(4) Minimum byte programming time (excluding system overhead) is 16 s (10 s program + 6 s write recovery), while maximum is 400 s/
(5) Excludes 00H Programming prior to Erasure.
CAT28F020
A.C. CHARACTERISTICS, Program/Erase Operation
V
ERASE AND PROGRAMMING PERFORMANCE
Doc. No. 25037-00 2/98 F-1
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CC
JEDEC
Symbol
AVAV
AVWL
WLAX
DVWH
WHDX
ELWL
WHEH
WLWH
WHWL
WHWH1
WHWH2
WHGL
GHWL
VPEL
Chip Erase Time
Chip Program Time
V
byte (16 s x 25 loops). Max chip programming time is specified lower than the worst case allowed by the programming algorithm since
most bytes program significantly faster than the worst case byte.
= +5V 10%, unless otherwise specified.
PPL
(2)
(2)
can be ground, less than V
Parameter
Standard
Symbol
t
t
t
t
t
t
t
t
t
-
-
-
-
-
WC
AS
AH
DS
DH
CS
CH
WP
WPH
(3)(5)
(3)(4)
Write Cycle Time
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
CE Setup Time
CE Hold Time
WE Pulse Width
WE High Pulse Width
Program Pulse Width
Erase Pulse Width
Write Recovery Time Before Read
Read Recovery Time Before Write
V
PP
Min.
Setup Time to CE
28F020-70
CC
Parameter
Typ.
0.5
4
+ 2.0V or a no connect with a resistor tied to ground.
Max.
10
25
Min.
PPH
28F020-90
(1)
and V
Typ.
0.5
4
PPL
Min.
100
28F020-70
70
40
10
9.5
40
40
10
0
0
0
20
6
0
6
. The V
Max.
10
25
Max.
PP
Min.
supply can be either hardwired or switched. If V
Min.
100
40
28F020-90
40
40
10
9.5
20
10
90
0
0
6
0
28F020-12
0
Typ.
0.5
4
Max.
Max.
PP
10
25
Min.
120
100
28F020-12
9.5
.
40
40
10
40
20
10
0
0
0
6
0
Unit
sec
sec
Max.
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
PP
is switched,