AT27C516 데이터 시트보기 (PDF) - Atmel Corporation
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AT27C516 Datasheet PDF : 8 Pages
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AT27C516
AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Sym-
bol Parameter
Test
Conditions* (1)
tAS
tCES
tOES
tDS
tAH
tDH
tDFP
tVPS
tVCS
tPW
tOE
tPRT
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)
VPP Setup Time
VCC Setup Time
PGM Program Pulse Width (3)
Data Valid from OE
VPP Pulse Rise Time During
Programming
Limit
Min Max Units
2
µs
2
µs
2
µs
2
µs
0
µs
2
µs
0 130 ns
2
µs
2
µs
47.5 52.5 µs
150 ns
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. VCC must be applied simultaneously or before VPP
and removed simultaneously or after VPP.
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 µsec ± 5%.
Rapid Programming Algorithm
A 50 µs PGM pulse width is used to program. The address
is set to the first location. VCC is raised to 6.5V and VPP is
raised to 13.0V. Each address is first programmed with
one 50 µs PGM pulse without verification. Then a verifica-
tion / reprogramming loop is executed for each address.
In the event a word fails to pass verification, up to 10 suc-
cessive 50 µs pulses are applied with a verification after
each pulse. If the word fails to verify after 10 pulses have
been applied, the part is considered failed. After the word
verifies properly, the next address is selected until all have
been checked. VPP is then lowered to 5.0V and VCC to
5.0V. All words are read again and compared with the
original data to determine if the device passes or fails.
Atmel’s 27C516 Integrated
Product Identification Code
Codes
Pins
Hex
A0 015-08 O7 O6 O5 O4 O3 O2 O1 O0 Data
Manufacturer 0 0 0 0 0 1 1 1 1 0 001E
Device Type 1 0 1 1 1 1 0 0 1 0 00F2
3-151
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