AT28C256 ATMEL Corporation, AT28C256 Datasheet - Page 5

• Manufacturer Part Number: AT28C256
• Description: 256K 32K x 8 Paged CMOS E2PROM
• Manufacturer: ATMEL Corporation

AC Read Characteristics
AC Read Waveforms
Notes: 1. CE may be delayed up to t
Input Test Waveforms and
Measurement Level
t
Note:
Pin Capacitance (f = 1 MHz, T = 25°C)
R
, t
Symbol
t
t
t
t
t
ACC
CE
OE
DF
OH
C
C
F
IN
OUT
< 5ns
(3, 4)
(1)
(2)
2. OE may be delayed up to t
1. This parameter is characterized and is not 100% tested.
transition without impact on t
edge of CE without impact on t
after an address change without impact on t
Parameter
Address to Output Delay
CE to Output Delay
OE to Output Delay
CE or OE to Output Float
Output Hold from OE, CE or
Address, whichever
occurred first
(1, 2, 3, 4)
ACC
CE
ACC
- t
CE
- t
OE
.
CE
or by t
Typ
after the falling
4
8
after the address
ACC
AT28C256-15 AT28C256-20 AT28C256-25 AT28C256-35
Min
ACC
0
0
0
- t
OE
.
Max
150
150
(1)
70
50
Output Test Load
Max
3. t
4. This parameter is characterized and is not 100% tested.
12
6
Min
(C
0
0
0
DF
L
is specified from OE or CE whichever occurs first
= 5 pF).
Max
200
200
80
55
Min
0
0
0
Units
pF
pF
AT28C256
Max
250
250
100
60
Min
0
0
0
Conditions
V
V
IN
OUT
= 0V
Max
350
350
100
70
= 0V
Units
ns
ns
ns
ns
ns
2-221