CAT28F020 CATALYST [Catalyst Semiconductor], CAT28F020 Datasheet - Page 5

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

0.45 V
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Output floating (High-Z) is defined as the state where the external data line is no longer driven by the output buffer.
(3) Input Rise and Fall Times (10% to 90%) < 10 ns.
(4) Input Pulse Levels = 0.45V and 2.4V. For High Speed Input Pulse Levels 0.0V and 3.0V.
(5) Input and Output Timing Reference = 0.8V and 2.0V. For High Speed Input and Output Timing Reference = 1.5V.
(6) Low-Z is defined as the state where the external data may be driven by the output buffer but may not be valid.
(7) For load and reference points, see Fig. 1
(8) For load and reference points, see Fig. 2
SUPPLY CHARACTERISTICS
A.C. CHARACTERISTICS, Read Operation
V
Figure 1. A.C. Testing Input/Output Waveform
2.4 V
Testing Load Circuit (example)
t
t
t
t
t
t
t
t
t
t
CC
AVAV
ELQV
AVQV
GLQV
AXQX
GLQX
ELQX
GHQZ
EHQZ
WHGL
Symbol
DEVICE
UNDER
JEDEC
TEST
Symbol
= +5V 10%, unless otherwise specified.
(1)
V
V
V
CC
PPL
PPH
INPUT PULSE LEVELS
Standard
t
t
t
t
t
t
t
t
t
Symbol
RC
CE
ACC
OE
OH
OLZ
LZ
DF
DF
(1)(6)
(1)(2)
(1)(2)
-
(1)(6)
1.3V
1N914
3.3K
C L = 100 pF
Read Cycle Time
CE Access Time
Address Access Time
OE Access Time
Output Hold from Address OE/CE Change
OE to Output in Low-Z
CE to Output in Low-Z
OE High to Output High-Z
CE High to Output High-Z
Write Recovery Time Before Read
V
V
V
CC
PP
PP
2.0 V
0.8 V
During Read Operations
During Read/Erase/Program
Supply Voltage
Parameter
C L INCLUDES JIG CAPACITANCE
OUT
Parameter
REFERENCE POINTS
(3)(4)(5)
5
28F020-70
Min.
70
3.0 V
0.0 V
Figure 2. Highspeed A.C. Testing Input/Output
6
0
0
0
Testing Load Circuit (example)
DEVICE
UNDER
TEST
Max.
70
70
28
20
30
(8)
INPUT PULSE LEVELS
11.4
Min
28F020-90
4.5
Min.
Waveform
0
90
6
0
0
0
Max.
Limits
90
90
35
40
30
1.3V
(7)
(3)(4)(5)
1N914
3.3K
C L = 30 pF
28F020-12
Min.
120
0
0
0
6
1.5 V
Max.
12.6
5.5
6.5
Max.
120
120
50
30
40
(7)
C L INCLUDES JIG CAPACITANCE
OUT
REFERENCE POINTS
Unit
Doc. No. 25037-00 2/98 F-1
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
CAT28F020
Unit
V
V
V