28LV64A Просмотр технического описания (PDF) - Microchip Technology
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28LV64A Datasheet PDF : 8 Pages
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28LV64A
TABLE 1-4: BYTE WRITE AC CHARACTERISTICS
AC Testing Waveform:
Output Load:
Input Rise/Fall Times:
Ambient Temperature:
VIH = 2.0V; VIL = 0.6V; VOH = VOL = VCC/2
1 TTL Load + 100 pF
20 ns
Commercial (C): Tamb = 0°C to +70°C
Industrial (I) : Tamb = -40°C to +85°C
Parameter
Sym
Min
Max
Units
Remarks
Address Set-Up Time
tAS
10
ns
Address Hold Time
tAH
100
ns
Data Set-Up Time
tDS
120
ns
Data Hold Time
tDH
10
ns
Write Pulse Width
tWPL
150
ns
(Note 1)
OE Hold Time
tOEH
10
ns
OE Set-Up Time
tOES
10
ns
Data Valid Time
tDV
1000
ns
(Note 2)
Time to Device Busy
tDB
50
ns
Write Cycle Time (28LV64A)
tWC
3
ms
1.5 ms typical
Note 1: A write cycle can be initiated be CE or WE going low, whichever occurs last. The data is latched on the
positive edge of CE or WE, whichever occurs first.
2: Data must be valid within 1000ns max. after a write cycle is initiated and must be stable at least until tDH
after the positive edge of WE or CE, whichever occurs first.
FIGURE 1-2: PROGRAMMING WAVEFORMS
VIH
Address
VIL
VIH
CE, WE
VIL
VIH
Data In
VIL
VIH
OE
VIL
VOH
Rdy/Busy
VOL
tAS
tAH
tWPL
tDV
tDS
tOES
twc
tDH
tOEH
tDB
Busy
Ready
DS21113B-page 4
Preliminary
© 1996 Microchip Technology Inc.
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