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CAT28F020
A.C. CHARACTERISTICS, Program/Erase Operation
V CC = +5V ± 10%, unless otherwise specified. (See Note 6)
JEDEC
Standard
28F020-90
28F020-12
Symbol
Symbol
Parameter
Min
Typ
Max
Min
Typ
Max
Unit
t AVAV
t AVWL
t WLAX
t DVWH
t WHDX
t ELWL
t WHEH
t WLWH
t WHWL
t WC
t AS
t AH
t DS
t DH
t CS
t CH
t WP
t WPH
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
90
0
40
40
10
0
0
40
20
120
0
40
40
10
0
0
40
20
ns
ns
ns
ns
ns
ns
ns
ns
ns
t WHWH1
(2)
-
Program Pulse Width
10
10
μ s
t WHWH2(2)
t WHGL
t GHWL
t VPEL
-
-
-
-
Erase Pulse Width
Write Recovery Time Before Read
Read Recovery Time Before Write
V PP Setup Time to CE
9.5
6
0
100
9.5
6
0
100
ms
μ s
μ s
ns
ERASE AND PROGRAMMING PERFORMANCE (1)
28F020-90
28F020-12
Parameter
Chip Erase
Time (3)(5)
Min
Typ
0.5
Max
10
Min
Typ
0.5
Max
10
Unit
sec
Chip Program Time (3)(4)
4
25
4
25
sec
Note:
1. Please refer to Supply characteristics for the value of V PPH and V PPL . The V PP supply can be either hardwired or switched. If V PP is switched,
V PPL can be ground, less than V CC + 2.0V or a no connect with a resistor tied to ground.
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 PP .
4. Minimum byte programming time (excluding system overhead) is 16 μ s (10 μ s program + 6 μ s write recovery), while maximum is 400 μ s/
byte (16 μ 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.
5. Excludes 00H Programming prior to Erasure.
6. CAT28F020-90, V CCMIN = 4.75 V
Doc. No. MD-1029, Rev. F
6
? 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
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