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AT29C257 Datasheet(PDF) 4 Page - ATMEL Corporation

Part No. AT29C257
Description  256K 32K x 8 5-volt Only CMOS Flash Memory
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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 4 page
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Operating Modes
Mode
CE
OE
WE
Ai
I/O
Read
VIL
VIL
VIH
Ai
DOUT
Program (2)
VIL
VIH
VIL
Ai
DIN
5V Chip Erase
VIL
VIH
VIL
Ai
Standby/Write Inhibit
VIH
X
(1)
X
X
High Z
Write Inhibit
X
X
VIH
Write Inhibit
X
VIL
X
Output Disable
X
VIH
X
High Z
High Voltage Chip Erase
VIL
VH
(3)
VIL
X
High Z
Product Identification
Hardware
VIL
VIL
VIH
A1 - A14 = VIL, A9 = VH,
A0 = VIL
Manufacturer Code (4)
A1 - A14 = VIL, A9 = VH,
A0 = VIH
Device Code (4)
Software (5)
A0 = VIL
Manufacturer Code (4)
A0 = VIH
Device Code (4)
4. Manufacturer Code: 1F, Device Code: DC
5. See details under Software Product Identification Entry/Exit.
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V
± 0.5V.
DC Characteristics
Symbol
Parameter
Condition
Min
Max
Units
ILI
Input Load Current
VIN = 0V to VCC
10
µA
ILO
Output Leakage Current
VI/O = 0V to VCC
10
µA
ISB1
VCC Standby Current CMOS
CE = VCC - 0.3V to VCC
300
µA
ISB2
VCC Standby Current TTL
CE = 2.0V to VCC
3mA
ICC
VCC Active Current
f= 5 MHz; IOUT = 0 mA
50
mA
VIL
Input Low Voltage
0.8
V
VIH
Input High Voltage
2.0
V
VOL
Output Low Voltage
IOL = 2.1 mA
.45
V
VOH1
Output High Voltage
IOH = -400
µA
2.4
V
VOH2
Output High Voltage CMOS
IOH = -100
µA; VCC = 4.5V
4.2
V
DC and AC Operating Range
AT29C257-70
AT29C257-90
AT29C257-12
AT29C257-15
Operating
Temperature (Case)
Com.
0
°C - 70°C0°C - 70°C0°C - 70°C0°C - 70°C
Ind.
-40
°C - 85°C-40°C - 85°C-40°C - 85°C-40°C - 85°C
VCC Power Supply
5V
± 5%
5V
± 10%
5V
± 10%
5V
± 10%
4-108
AT29C257




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