AT27C256R-45PU Просмотр технического описания (PDF) - Atmel Corporation
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AT27C256R-45PU Datasheet PDF : 13 Pages
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Atmel AT27C256R
Table 5-6. DC programming characteristics
TA = 25 5°C, VCC = 6.5 0.25V, VPP = 13.0 0.25V
Symbol
ILI
VIL
VIH
VOL
VOH
ICC2
IPP2
VID
Parameter
Input load current
Input low level
Input high level
Output low volt
Output high volt
VCC supply current (program and verify)
VPP current
A9 product identification voltage
Test Conditions
VIN = VIL,VIH
IOL = 2.1mA
IOH = -400µA
CE = VIL
Limits
Min
Max
±10
-0.6
0.8
2.0
VCC + 1
0.4
2.4
25
25
11.5
12.5
Units
µA
V
V
V
V
mA
mA
V
Table 5-7. AC programming characteristics
TA = 25 5°C, VCC = 6.5 0.25V, VPP = 13.0 0.25V
Symbol Parameter
Test conditions(1)
Limits
Min
Max
Units
tAS
tOES
tDS
tAH
tDH
tDFP
tVPS
tVCS
tPW
tOE
tPRT
Notes:
Address setup time
2
µs
OE setup time
Data setup time
Input rise and fall times
2
µs
(10% to 90%) 20ns
2
µs
Address hold time
Data hold time
OE high to output float delay(2)
VPP setup time
VCC setup time
CE program pulse width(3)
Data valid from OE(2)
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
0
µs
2
µs
0
130
ns
2
µs
2
µs
95
105
µs
150
ns
VPP pulse rise time during programming
50
ns
1. VCC must be applied simultaneously with or before VPP and removed simultaneously with 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 100µs 5%.
Table 5-8. The Atmel AT27C256R integrated product identification code
Codes
Manufacturer
Device type
Pins
Hex
A0
O7
O6
O5
O4
O3
O2
O1
O0
data
0
0
0
0
1
1
1
1
0
1E
1
1
0
0
0
1
1
0
0
8C
7
0014O–EPROM–10/11
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