Ac programming characteristics – Rainbow Electronics AT27C800 User Manual
Page 8
AT27C800
8
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 50 µs
±
5%.
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
Units
Min
Max
t
AS
Address Setup Time
Input Rise and Fall Times:
(10% to 90%) 20 ns
Input Pulse Levels:
45V to 2.4V
Input Pulse Levels:
0.8V to 2.0V
Input Timing Reference Level:
0.8V to 2.0V
Output Timing Reference Level:
0.8V to 2.0V
2
µs
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)
47.5
52.5
µs
t
OE
Data Valid from OE
150
ns
t
PRT
BYTE /V
PP
Pulse Rise Time During
Programming
50
ns
Atmel’s 27C800 Integrated Product Identification Code
Codes
Pins
Hex Data
A0
O15
O14
O13
O12
O11
O10
O9
O8
O7
O6
O5
O4
O3
O2
O1
O0
Manufacturer
0
0
0
0
1
1
1
1
0
1E1E
Device Type
1
1
1
1
1
1
0
0
0
F8F8