
Atmel AT27LV256A
Table 5-6.
DC programming characteristics
T A = 25 ? 5°C, V CC = 6.5 ? 0.25V, V PP = 13.0 ? 0.25V
Limits
Symbol
Parameter
Test conditions
Min
Max
Units
I LI
V IL
V IH
V OL
Input load current
Input low level
Input high level
Output low voltage
V IN = V IL , V IH
I OL = 2.1mA
-0.6
2.0
? 10
0.8
V CC + 0.5
0.4
μA
V
V
V
V OH
I CC2
Output high voltage
V CC supply current (program and verify)
I OH = -400μA
2.4
25
V
mA
I PP2
V ID
V PP current
A9 product identification voltage
CE = V IL
11.5
25
12.5
mA
V
Table 5-7.
AC programming characteristics
T A = 25 ? 5°C, V CC = 6.5 ? 0.25V, V PP = 13.0 ? 0.25V
Limits
Symbol
Parameter
Test conditions
(1)
Min
Max
Units
t AS
Address setup time
2
μs
t OES
t DS
t AH
t DH
OE setup time
Data setup time
Address hold time
Data hold time
Input rise and fall times
(10% to 90%) 20ns
Input pulse levels
0.45V to 2.4V
2
2
0
2
μs
μs
μs
μs
t DFP
t VPS
t VCS
OE high to output float delay
V PP setup time
V CC setup time
(2)
Input timing reference level
0.8V to 2.0V
0
2
2
130
ns
μs
μs
Data valid from OE
t PW
t OE
t PRT
CE program pulse width (3)
(2)
V PP pulse rise time during programming
Output timing reference level
0.8V to 2.0V
95
50
105
150
μs
ns
ns
Notes:
1. V CC must be applied simultaneously with or before V PP and removed simultaneously with or after V PP .
2. This parameter is only sampled, and is not 100% tested. Output float is defined as the point where data is no longer driven.
See timing diagram.
3. Program pulse width tolerance is 100 ? μsec ??? 5%.
Table 5-8.
The Atmel AT27LV256A integrated product identification code (1)
Pins
Codes
Manufacturer
Device type
A0
0
1
O7
0
1
O6
0
0
O5
0
0
O4
1
0
O3
1
1
O2
1
1
O1
1
0
O0
0
0
Hex data
1E
8C
Note:
1. The Atmel AT27LV256A has the same product identification code as the Atmel AT27C256R. Both are programming
compatible.
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