AT27C256R-70RA Просмотр технического описания (PDF) - Atmel Corporation
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AT27C256R-70RA Datasheet PDF : 15 Pages
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6. Operating Modes
Mode/Pin
CE
OE
Ai
VPP
Outputs
Read
VIL
VIL
Ai
VCC
DOUT
Output Disable
VIL
VIH
X(1)
VCC
High Z
Standby
VIH
X(1)
X(1)
VCC
High Z
Rapid Program(2)
VIL
VIH
Ai
VPP
DIN
PGM Verify(2)
X(1)
VIL
Ai
VPP
DOUT
Optional PGM Verify(2)
VIL
VIL
Ai
VCC
DOUT
PGM Inhibit(2)
VIH
VIH
X(1)
VPP
High Z
Product Identification(4)
VIL
A9 = VH(3)
VIL
A0 = VIH or VIL
VCC
Identification Code
A1 - A14 = VIL
Notes: 1. X can be VIL or VIH.
2. Refer to Programming Characteristics.
3. VH = 12.0 ± 0.5V.
4. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled
low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
7. DC and AC Operating Conditions for Read Operation
Operating Temp. (Case)
VCC Supply
Ind.
Auto.
-45
-40° C - 85° C
5V ± 10%
AT27C256R
-70
-40° C - 85° C
-40° C - 125° C
5V ± 10%
8. DC and Operating Characteristics for Read Operation
Symbol Parameter
Condition
Min
Max
Units
ILI
Input Load Current
VIN = 0V to VCC
Ind.
Auto.
±1
µA
±5
µA
ILO
Output Leakage Current
VOUT = 0V to VCC
Ind.
Auto.
±5
µA
±10
µA
IPP1(2)
VPP(1) Read/Standby Current VPP = VCC
10
µA
ISB
VCC(1) Standby Current
ISB1 (CMOS), CE = VCC ± 0.3V
ISB2 (TTL), CE = 2.0 to VCC + 0.5V
100
µA
1
mA
ICC
VCC Active Current
f = 5 MHz, IOUT = 0 mA, E = VIL
20
mA
VIL
Input Low Voltage
-0.6
0.8
V
VIH
Input High Voltage
2.0
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1 mA
0.4
V
VOH
Output High Voltage
IOH = -400 µA
2.4
V
Notes: 1. VCC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP..
2. VPP may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and IPP.
4 AT27C256R
0014M–EPROM–12/07
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