28C256 Datasheet PDF - ATMEL Corporation
| Part Number | 28C256 | |
| Description | 256K 32K x 8 Paged CMOS E2PROM | |
| Manufacturers | ATMEL Corporation | |
| Logo |  |
|
|
There is a preview and 28C256 download ( pdf file ) link at the bottom of this page. Total 14 Pages | ||
Preview 1 page No Preview Available !
AT28C256
Features
Fast Read Access Time - 150 ns
•• Automatic Page Write Operation
Internal Address and Data Latches for 64-Bytes
Internal Control Timer
• Fast Write Cycle Times
Page Write Cycle Time: 3 ms or 10 ms Maximum
1 to 64-Byte Page Write Operation
• Low Power Dissipation
50 mA Active Current
200 µA CMOS Standby Current
Hardware and Software Data Protection
• DATA Polling for End of Write Detection
•• High Reliability CMOS Technology
Endurance: 104 or 105 Cycles
Data Retention: 10 Years
• Single 5V ± 10% Supply
CMOS and TTL Compatible Inputs and Outputs
• JEDEC Approved Byte-Wide Pinout
•• Full Military, Commercial, and Industrial Temperature Ranges
256K (32K x 8)
Paged
CMOS
E2PROM
Description
The AT28C256 is a high-performance Electrically Erasable and Programmable Read
Only Memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufac-
tured with Atmel’s advanced nonvolatile CMOS technology, the device offers access
times to 150 ns with power dissipation of just 440 mW. When the device is deselected,
the CMOS standby current is less than 200 µA.
(continued)
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
TSOP
Top View
PGA
Top View
LCC, PLCC
Top View
CERDIP, PDIP,
FLATPACK, SOIC
Top View
AT28C256
Note: PLCC package pins 1 and
17 are DON’T CONNECT.
0006F
2-217
|
| |
 
AT28C256
AC Read Characteristics
Symbol
tACC
tCE (1)
tOE (2)
tDF (3, 4)
tOH
Parameter
Address to Output Delay
CE to Output Delay
OE to Output Delay
CE or OE to Output Float
Output Hold from OE, CE or
Address, whichever
occurred first
AT28C256-15 AT28C256-20 AT28C256-25 AT28C256-35
Min Max Min Max Min Max Min Max
150 200 250 350
150 200 250 350
0 70 0 80 0 100 0 100
0 50 0 55 0 60 0 70
0000
Units
ns
ns
ns
ns
ns
AC Read Waveforms (1, 2, 3, 4)
Notes: 1. CE may be delayed up to tACC - tCE after the address
transition without impact on tACC.
2. OE may be delayed up to tCE - tOE after the falling
edge of CE without impact on tCE or by tACC - tOE
after an address change without impact on tACC.
Input Test Waveforms and
Measurement Level
3. tDF is specified from OE or CE whichever occurs first
(CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
Output Test Load
tR, tF < 5ns
Pin Capacitance (f = 1 MHz, T = 25°C) (1)
Typ Max
CIN 4 6
COUT
8 12
Note: 1. This parameter is characterized and is not 100% tested.
Units
pF
pF
Conditions
VIN = 0V
VOUT = 0V
2-221
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 28C256 electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 28C256.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| 28C256 | The function is 256K 32K x 8 Paged CMOS E2PROM. ATMEL Corporation | |
| 28C256 | The function is 5 Volt / Byte Alterable E2PROM. Xicor |  |
| 28C256 | The function is 32K-Bit Parallel E2PROM. Catalyst |  |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
28C2
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||