AT28C256-20DM/883 Atmel, AT28C256-20DM/883 Datasheet - Page 10
![IC EEPROM 256KBIT 200NS 28CDIP](/photos/7/27/72784/28d6-cerdip_sml.jpg)
AT28C256-20DM/883
Manufacturer Part Number
AT28C256-20DM/883
Description
IC EEPROM 256KBIT 200NS 28CDIP
Manufacturer
Atmel
Datasheet
1.AT28C256-15PU.pdf
(25 pages)
Specifications of AT28C256-20DM/883
Format - Memory
EEPROMs - Parallel
Memory Type
EEPROM
Memory Size
256K (32K x 8)
Speed
200ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Package / Case
28-CDIP (0.600", 15.24mm)
Organization
32 K x 8
Interface Type
Parallel
Access Time
200 ns
Output Enable Access Time
80 ns
Supply Voltage (max)
5 V
Supply Voltage (min)
4.5 V
Maximum Operating Current
50 mA
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 55 C
Operating Supply Voltage
5 V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT28C256-20DM/883
Manufacturer:
AT
Quantity:
1
Company:
Part Number:
AT28C256-20DM/883C
Manufacturer:
ATMEL
Quantity:
23
21. Software Protected Write Cycle Waveforms
Notes:
19. Software Data Protection
Notes:
10
Enable Algorithm
1. A6 through A14 must specify the same page address during each high to low transition of WE (or CE) after the software
2. OE must be high only when WE and CE are both low.
1. Data Format: I/O7 - I/O0 (Hex);
2. Write Protect state will be activated at end of write
3. Write Protect state will be deactivated at end of write
4. 1 to 64 bytes of data are loaded.
AT28C256
code has been entered.
Address Format: A14 - A0 (Hex).
even if no other data is loaded.
period even if no other data is loaded.
LOAD LAST BYTE
ANY ADDRESS
ADDRESS 2AAA
LAST ADDRESS
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA XX
LOAD DATA 55
LOAD DATA A0
TO
TO
TO
TO
TO
(4)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(1)
(2)
20. Software Data Protection
Disable Algorithm
(1)(2)
LOAD LAST BYTE
ANY ADDRESS
ADDRESS 2AAA
ADDRESS 2AAA
LAST ADDRESS
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
LOAD DATA AA
LOAD DATA XX
LOAD DATA 55
LOAD DATA 80
LOAD DATA 55
LOAD DATA 20
TO
TO
TO
TO
TO
TO
TO
TO
(4)
EXIT DATA
PROTECT STATE
(1)
0006M–PEEPR–12/09
(3)