CAT28C64B
A.C. CHARACTERISTICS, Read Cycle
V
CC
= 5V
±10%,
unless otherwise specified.
28C64B-12
Symbol
t
RC
t
CE
t
AA
t
OE
t
LZ(1)
t
OLZ(1)
t
HZ(1)(2)
t
OHZ(1)(2)
t
OH(1)
Parameter
Read Cycle Time
CE
Access Time
Address Access Time
OE
Access Time
CE
Low to Active Output
OE
Low to Active Output
CE
High to High-Z Output
OE
High to High-Z Output
Output Hold from Address Change
0
0
0
50
50
0
Min.
120
120
120
60
0
0
50
50
Max.
28C64B-15
Min.
150
150
150
70
Max.
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
Figure 1. A.C. Testing Input/Output Waveform(3)
2.4 V
INPUT PULSE LEVELS
0.45 V
0.8 V
2.0 V
REFERENCE POINTS
5096 FHD F03
Figure 2. A.C. Testing Load Circuit (example)
1.3V
1N914
3.3K
DEVICE
UNDER
TEST
OUT
CL = 100 pF
CL INCLUDES JIG CAPACITANCE
5096 FHD F04
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 when the external data line is no longer driven by the output buffer.
(3) Input rise and fall times (10% and 90%) < 10 ns.
5
Doc. No. 25006-0A 2/98 P-1
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