29C256 Datasheet PDF - ATMEL Corporation
| Part Number | 29C256 | |
| Description | 256K 32K x 8 5-volt Only CMOS Flash Memory | |
| Manufacturers | ATMEL Corporation | |
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Features
• Fast Read Access Time – 70 ns
• 5-volt Only Reprogramming
• Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– Internal Address and Data Latches for 64 Bytes
• Internal Program Control and Timer
• Hardware and Software Data Protection
• Fast Program Cycle Times
– Page (64 Byte) Program Time – 10 ms
– Chip Erase Time – 10 ms
• DATA Polling for End of Program Detection
• Low-power Dissipation
– 50 mA Active Current
– 300 µA CMOS Standby Current
• Typical Endurance > 10,000 Cycles
• Single 5V ± 10% Supply
• CMOS and TTL Compatible Inputs and Outputs
• Commercial and Industrial Temperature Ranges
Description
The AT29C256 is a five-volt-only in-system Flash programmable and erasable read
only memory (PEROM). Its 256K of memory is organized as 32,768 words by 8 bits.
Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers
access times to 70 ns with power dissipation of just 275 mW. When the device is
deselected, the CMOS standby current is less than 300 µA. The device endurance is
such that any sector can typically be written to in excess of 10,000 times.
256K (32K x 8)
5-volt Only
Flash Memory
AT29C256
Pin Configurations
Pin Name
A0 - A14
CE
OE
WE
I/O0 - I/O7
NC
DC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
Don’t Connect
PLCC and LCC Top View
TSOP Top View
Type 1
OE
A11
A9
A8
A13
A14
VCC
WE
A12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
21 A10
20 CE
19 I/O7
18 I/O6
17 I/O5
16 I/O4
15 I/O3
14 GND
13 I/O2
12 I/O1
11 I/O0
10 A0
9 A1
8 A2
A6 5
A5 6
A4 7
A3 8
A2 9
A1 10
A0 11
NC 12
I/O0 13
29 A8
28 A9
27 A11
26 NC
25 OE
24 A10
23 CE
22 I/O7
21 I/O6
Note: PLCC package pins 1 and 17 are
DON’T CONNECT.
Rev. 0046P–FLASH–10/04
1
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AT29C256
DC and AC Operating Range
Operating
Temperature (Case)
Com.
Ind.
AT29C256-70
0°C - 70°C
-40°C - 85°C
VCC Power Supply
5V ± 5%
Note:
Not recommended for New Designs.
AT29C256-90
0°C - 70°C
-40°C - 85°C
5V± 10%
AT29C256-12
0°C - 70°C
-40°C - 85°C
5V± 10%
AT29C256-15
0°C - 70°C
-40°C - 85°C
5V± 10%
Operating Modes
Mode
Read
Program(2)
5V Chip Erase
Standby/Write Inhibit
Write Inhibit
Write Inhibit
Output Disable
High Voltage Chip Erase
Product Identification
Hardware
CE OE WE
VIL VIL VIH
VIL VIH VIL
VIL VIH VIL
VIH X(1) X
X X VIH
X VIL X
X VIH X
VIL VH(3) VIL
VIL VIL VIH
Software(5)
Notes:
1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
4. Manufacturer Code: 1F, Device Code: DC.
5. See details under Software Product Identification Entry/Exit.
DC Characteristics
Ai I/O
Ai DOUT
Ai DIN
Ai
X High Z
High Z
X High Z
A1-A14 = VIL, A9 = VH, A0 = VIL
A1-A14 = VIL, A9 = VH, A0 = VIH
A0 = VIL
A0 = VIH
Manufacturer Code(4)
Device Code(4)
Manufacturer Code(4)
Device Code(4)
Symbol
ILI
ILO
ISB1
ISB2
ICC
VIL
VIH
VOL
VOH1
VOH2
Parameter
Input Load Current
Output Leakage Current
VCC Standby Current CMOS
VCC Standby Current TTL
VCC Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output High Voltage CMOS
Condition
VIN = 0V to VCC
VI/O = 0V to VCC
CE = VCC - 0.3V to VCC
CE = 2.0V to VCC
f = 5 MHz; IOUT = 0 mA
IOL = 2.1 mA
IOH = -400 µA
IOH = -100 µA; VCC = 4.5V
Min Max Units
10 µA
10 µA
300 µA
3 mA
50 mA
0.8 V
2.0 V
0.45 V
2.4 V
4.2 V
0046P–FLASH–10/04
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 29C256 electronic component. |
| Information | Total 17 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 29C256.PDF Datasheet ] | |
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