AT27C400-12 ATMEL [ATMEL Corporation], AT27C400-12 Datasheet - Page 8

• Manufacturer Part Number: AT27C400-12
• Description: 4-Megabit 256K x 16 or 512K x 8 OTP EPROM
• Manufacturer: ATMEL [ATMEL Corporation]

AC Programming Characteristics
TA = 25
Notes:
Atmel’s 27C400 Integrated Product Identification Code
8
t
t
t
t
t
t
t
t
t
t
t
Symbol Parameter
AS
OES
DS
AH
DH
DFP
VPS
VCS
PW
OE
PRT
Codes
Manufacturer
Device Type
1.
2.
3.
5°C, V
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
During Programming
PP
CC
V
This parameter is only sampled and is not 100%
tested. Ouput Float is defined as the point where data is no longer driven — see timing diagram.
Program Pulse width tolerance is 50 sec
CC
Setup Time
Setup Time
CC
must be applied simultaneously or before V
PP
= 6.5
Pulse Rise Time
AT27C400
0.25V, V
A0
0
1
(2)
PP
O15
(3)
O7
= 13.0
0
1
0.25V
O14
O6
0
1
5%.
O13
PP
O5
0
1
and removed simultaneously or after V
Input Rise and Fall Times
Input Pulse Levels
Input Timing Reference Level
Output Timing Reference Level
O12
Pins
O4
1
1
Test Conditions
O11
O3
(10% to 90%) 20ns
1
0
0.45V to 2.4V
0.8V to 2.0V
0.8V to 2.0V
O10
O2
(1)
1
1
PP
O9
O1
1
0
.
47.5
Min
50
2
2
2
0
2
0
2
2
Limits
O8
O0
0
0
Max
52.5
130
150
1E1E
F4F4
Data
Hex
Units
ns
ns
ns
s
s
s
s
s
s
s
s