CAT28C257HT13A-15T Просмотр технического описания (PDF) - Catalyst Semiconductor => Onsemi
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CAT28C257HT13A-15T Datasheet PDF : 10 Pages
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Advanced
CAT28C257
A.C. CHARACTERISTICS, Write Cycle
VCC=5V±10%, unless otherwise specified
Symbol
tWC
tAS
tAH
tCS
tCH
tCW(3
tOES
tOEH
tWP(3)
tDS
tDH
tINIT(1)
tBLC(1)(4)
Parameter
28C257-90
Min. Max.
Write Cycle Time
5
Address Setup Time
0
Address Hold Time
50
CE Setup Time
0
CE Hold Time
0
CE Pulse Time
100
OE Setup Time
0
OE Hold Time
0
WE Pulse Width
100
Data Setup Time
50
Data Hold Time
0
Write Inhibit Period After Power-up 5
10
Byte Load Cycle Time
0.1 100
28C257-12
Min. Max.
5
0
50
0
0
100
0
0
100
50
0
5
10
0.1 100
28C257-15
Min. Max.
5
0
50
0
0
100
0
0
100
50
0
5
10
0.1 100
Units
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
µs
Figure 1. A.C. Testing Input/Output Waveform(2)
2.4 V
0.45 V
INPUT PULSE LEVELS
2.0 V
0.8 V
REFERENCE POINTS
5096 FHD F03
Figure 2. A.C. Testing Load Circuit (example)
1.3V
1N914
DEVICE
UNDER
TEST
3.3K
OUT
CL = 100 pF
5096 FHD F04
Note:
CL INCLUDES JIG CAPACITANCE
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Input rise and fall times (10% and 90%) < 10 ns.
(3) A write pulse of less than 20ns duration will not initiate a write cycle.
(4) A timer of duration tBLC max. begins with every LOW to HIGH transition of WE. If allowed to time out, a page or byte write will begin;
however a transition from HIGH to LOW within tBLC max. stops the timer.
5
Doc. No. 25073-00 2/98
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