9
0547G–EPROM–12/07
AT27LV256A
Notes: 1. V
CC
must be applied simultaneously or before V
PP
and removed simultaneously 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%.
Note: 1. The AT27LV256A has the same Product Identification Code as the AT27C256R. Both are programming compatible.
15. DC Programming Characteristics
T
A
= 25 ± 5°C, V
CC
= 6.5 ± 0.25V, V
PP
= 13.0 ± 0.25V
Symbol Parameter Test Conditions
Limits
UnitsMin Max
I
LI
Input Load Current V
IN
= V
IL
, V
IH
±10 µA
V
IL
Input Low Level -0.6 0.8 V
V
IH
Input High Level 2.0 V
CC
+ 0.5 V
V
OL
Output Low Voltage I
OL
= 2.1 mA 0.4 V
V
OH
Output High Voltage I
OH
= -400 µA 2.4 V
I
CC2
V
CC
Supply Current (Program and Verify) 25 mA
I
PP2
V
PP
Current CE = V
IL
25 mA
V
ID
A9 Product Identification Voltage 11.5 12.5 V
16. AC Programming Characteristics
T
A
= 25 ± 5°C, V
CC
= 6.5 ± 0.25V, V
PP
= 13.0 ± 0.25V
Symbol Parameter Test Conditions
(1)
Limits
UnitsMin Max
t
AS
Address Setup Time
Input Rise and Fall Times:
(10% to 90%) 20 ns
Input Pulse Levels:
0.45V to 2.4V
Input Timing Reference Level:
0.8V to 2.0V
Output Timing Reference Level:
0.8V to 2.0V
2µs
t
OES
OE Setup Time 2 µs
t
DS
Data Setup Time 2 µs
t
AH
Address Hold Time 0 µs
t
DH
Data Hold Time 2 µs
t
DFP
OE High to Output Float Delay
(2)
0 130 ns
t
VPS
V
PP
Setup Time 2 µs
t
VCS
V
CC
Setup Time 2 µs
t
PW
CE Program Pulse Width
(3)
95 105 µs
t
OE
Data Valid from OE
(2)
150 ns
t
PRT
V
PP
Pulse Rise Time During Programming 50 ns
17. Atmel’s AT27LV256A Integrated Product Identification Code
(1)
Codes
Pins
Hex
DataA0 O7 O6 O5 O4 O3 O2 O1 O0
Manufacturer 000011110 1E
Device Type 110001100 8C
