AT27LV020A Datasheet, PDF (8/9 Pages) ATMEL Corporation – 2 Megabit 256K x 8 Low Voltage OTP EPROM

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
Min Max _Units
t_AS
t_CES
t_OES
t_DS
t_AH
t_DH
t_DFP
Address Setup Time
CE Setup Time
OE Setup Time
Data Setup Time
Address Hold Time
Data Hold Time
OE High to Output
Float Delay
2
µs
2
µs
2
µs
2
µs
0
µs
2
µs
0 130 ns
t_VPS
V_PP Setup Time
2
µs
t_VCS
V_CC Setup Time
2
µs
t_PW
PGM Program Pulse Width
95 105 µs
t_OE
Data Valid from OE
150 ns
t_PRT
V_PP Pulse Rise Time
During Programming
50
ns
*AC Conditions of Test:
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
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%.
Rapid Programming Algorithm
A 100 µs PGM pulse width is used to program. The
address is set to the first location. V_CC is raised to 6.5V and
V_PP is raised to 13.0V. Each address is first programmed
with one 100 µs PGM pulse without verification. Then a
verification/reprogramming loop is executed for each
address. In the event a byte fails to pass verification, up to
10 successive 100 µs pulses are applied with a verification
after each pulse. If the byte fails to verify after 10 pulses
have been applied, the part is considered failed. After the
byte verifies properly, the next address is selected until all
have been checked. V_PP is then lowered to 5.0V and V_CC
to 5.0V. All bytes are read again and compared with the
original data to determine if the device passes or fails.
Atmel's 27LV020A Integrated
Product Identification Code ⁽¹⁾
Codes
Pins
Hex
A0 O7 O6 O5 O4 O3 O2 O1 O0 ^Data
Manufacturer 0 0 0 0 1 1 1 1 0 1E
Device Type 1 1 0 0 0 0 1 1 0 86
Note:
1. The AT27LV020A has the same Product Identification
Code as the AT27C020. Both are programming com-
patible.
8
AT27LV020A