at27bv400 ATMEL Corporation, at27bv400 Datasheet - Page 8

• Manufacturer Part Number: at27bv400
• Description: 4-megabit 256k 512k Unregulated Battery-voltage High Speed Eprom
• Manufacturer: ATMEL Corporation

AC Programming Characteristics
T
Notes:
Atmel’s 27BV800 Integrated Product Identification Code
Note:
8
A
Symbol
t
t
t
t
t
t
t
t
t
t
t
Codes
Manufacturer
Device Type
AS
OES
DS
AH
DH
DFP
VPS
VCS
PW
OE
PRT
= 25 ± 5°C, V
1. V
2. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven—
3. Program Pulse width tolerance is 50 sec
1. The AT27BV400 has the same Product Identification Code as the AT27C400. Both are programming compatible.
see timing diagram.
Parameter
Address Setup Time
OE Setup Time
Data Setup Time
Address Hold Time
Data Hold Time
OE High to Output Float Delay
V
V
CE Program Pulse Width
Data Valid from OE
BYTE /V
Programming
cc
PP
CC
must be applied simultaneously or before V
CC
Setup Time
Setup Time
= 6.5 ± 0.25V, V
PP
A0
0
1
AT27BV400
Pulse Rise Time During
O15
O7
0
1
PP
(3)
= 13.0 ± 0.25V
O14
O6
0
1
(2)
O13
O5
Input Rise and Fall Times:
Input Pulse Levels:
Input Timing Reference Level:
Output Timing Reference Level:
0
1
5%.
PP
and removed simultaneously or after V
Test Conditions
Pins
O12
O4
1
1
(10% to 90%) 20 ns
O11
0.45V to 2.4V
O3
1
0
0.8V to 2.0V
0.8V to 2.0V
(1)
O10
O2
1
1
(1)
O9
O1
47.5
Min
1
0
50
2
2
2
0
2
0
2
2
PP
.
Limits
O0
O8
0
0
Max
52.5
130
150
Hex Data
1E1E
F4F4
Units
ns
ns
ns
s
s
s
s
s
s
s
s