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AT29C256-90PI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
7
AT29C256
0046O–FLASH–06/02
Input Test Waveforms and Measurement Level
Output Test Load
Note: 1. This parameter is characterized and is not 100% tested.
Pin Capacitance
f=1MHz,T=25°C
(1)
Symbol Typ Max Units Conditions
C
IN
46pFV
IN
=0V
C
OUT
812pFV
OUT
=0V
t
R
,t
F
<5ns
8
AT29C256
0046O–FLASH–06/02
AC Byte Load Waveforms
WE Controlled
CE
Controlled
AC Byte Load Characteristics
Symbol Parameter Min Max Units
t
AS
,t
OES
Address, OE Set-up Time 0 ns
t
AH
Address Hold Time 50 ns
t
CS
Chip Select Set-up Time 0 ns
t
CH
Chip Select Hold Time 0 ns
t
WP
Write Pulse Width (WE or CE)90ns
t
DS
Data Set-up Time 35 ns
t
DH
,t
OEH
Data, OE Hold Time 0 ns
t
WPH
Write Pulse Width High 100 ns
9
AT29C256
0046O–FLASH–06/02
Program Cycle Waveforms
(1)(2)(3)
Notes: 1. A6 through A14 must specify the page address during each high-to-low transition of WE (or CE).
2. OE
must be high when WE and CE are both low.
3. All bytes that are not loaded within the page being programmed will be indeterminate.
Program Cycle Characteristics
Symbol Parameter Min Max Units
t
WC
WriteCycleTime 10 ms
t
AS
Address Set-up Time 0 ns
t
AH
Address Hold Time 50 ns
t
DS
Data Set-up Time 35 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 90 ns
t
BLC
Byte Load Cycle Time 150 µs
t
WPH
Write Pulse Width High 100 ns
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

AT29C256-90PI

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Description:
IC FLASH 256K PARALLEL 28DIP
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