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28C64A-25ITS Datasheet(PDF) 3 Page - Microchip Technology

Part # 28C64A-25ITS
Description  64K (8K x 8) CMOS EEPROM
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

28C64A-25ITS Datasheet(HTML) 3 Page - Microchip Technology

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© 1996 Microchip Technology Inc.
DS11109H-page 3
28C64A
TABLE 1-3:
READ OPERATION AC CHARACTERISTICS
FIGURE 1-1:
READ WAVEFORMS
AC Testing Waveform:
VIH = 2.4V; VIL = 0.45V; VOH = 2.0V; VOL = 0.8V
Output Load:
1 TTL Load + 100 pF
Input Rise and Fall Times:
20 ns
Ambient Temperature:
Commercial (C):
Tamb
=
0˚C to +70˚C
Industrial
(I):
Tamb
=
-40˚C to +85˚C
Parameter
Symbol
28C64A
-15
28C64A
-20
28C64A
-25
Units
Conditions
Min
Max
Min
Max
Min
Max
Address to Output Delay
tACC
150
200
250
ns
OE = CE = VIL
CE to Output Delay
tCE
150
200
250
ns
OE = VIL
OE to Output Delay
tOE
—70—80—
100
ns
CE = VIL
CE or OE High to Output Float
tOFF
0500550
70
ns
(Note 1)
Output Hold from Address, CE
or OE, whichever occurs first.
tOH
0—0—0
ns
(Note 1)
Endurance
1M
1M
1M
cycles 25
°C, Vcc =
5.0V, Block
Mode (Note 2)
Note 1: Not 100% tested.
2: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific appli-
cation, please consult the Total Endurance Model which can be obtained on our BBS or website.
Address
CE
VIH
VIL
VIH
VIL
VIH
VIL
OE
Data
WE
VOH
VOL
VIH
VIL
Address Valid
High Z
Valid Output
tACC
(1) tOFF is specified for OE or CE, whichever occurs first
(2) OE may be delayed up to t CE - t OE after the falling edge of CE without impact on tCE
(3) This parameter is sampled and is not 100% tested
High Z
tOH
tOFF(1,3)
Notes:
tOE(2)
tCE(2)


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