28F020-12 데이터 시트보기 (PDF) - Catalyst Semiconductor => Onsemi
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28F020-12 Datasheet PDF : 14 Pages
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CAT28F020
SUPPLY CHARACTERISTICS
Symbol
VCC
VPPL
VPPH
Parameter
VCC Supply Voltage
VPP During Read Operations
VPP During Read/Erase/Program
Limits
Min
Max.
Unit
4.5
5.5
V
0
6.5
V
11.4
12.6
V
A.C. CHARACTERISTICS, Read Operation
VCC = +5V ±10%, unless otherwise specified.
JEDEC
Symbol
tAVAV
tELQV
tAVQV
tGLQV
tAXQX
tGLQX
tELQX
tGHQZ
tEHQZ
tWHGL(1)
Standard
28F020-70(8) 28F020-90(7) 28F020-12(7)
Symbol
Parameter
Min. Max. Min. Max. Min. Max.
tRC
Read Cycle Time
70
90
120
tCE
CE Access Time
70
90
120
tACC
Address Access Time
70
90
120
tOE
OE Access Time
28
35
50
tOH
Output Hold from Address OE/CE Change 0
0
0
tOLZ(1)(6) OE to Output in Low-Z
0
0
0
tLZ(1)(6) CE to Output in Low-Z
0
0
0
tDF(1)(2) OE High to Output High-Z
20
30
30
tDF(1)(2) CE High to Output High-Z
30
40
40
-
Write Recovery Time Before Read
6
6
6
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
Figure 1. A.C. Testing Input/Output Waveform(3)(4)(5) Figure 2. Highspeed A.C. Testing Input/Output
Waveform(3)(4)(5)
2.4 V
0.45 V
INPUT PULSE LEVELS
2.0 V
0.8 V
REFERENCE POINTS
3.0 V
0.0 V
INPUT PULSE LEVELS
1.5 V
REFERENCE POINTS
Testing Load Circuit (example)
1.3V
1N914
DEVICE
UNDER
TEST
3.3K
OUT
CL = 100 pF
CL INCLUDES JIG CAPACITANCE
Testing Load Circuit (example)
1.3V
1N914
DEVICE
UNDER
TEST
3.3K
CL = 30 pF
OUT
CL INCLUDES JIG CAPACITANCE
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
5
Doc. No. 25037-00 2/98 F-1
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