AT28HC256-70PI Atmel, AT28HC256-70PI Datasheet - Page 10
![IC EEPROM 256KBIT 70NS 28DIP](/photos/7/21/72189/453-28-dip_sml.jpg)
AT28HC256-70PI
Manufacturer Part Number
AT28HC256-70PI
Description
IC EEPROM 256KBIT 70NS 28DIP
Manufacturer
Atmel
Datasheet
1.AT28HC256-12JU.pdf
(24 pages)
Specifications of AT28HC256-70PI
Format - Memory
EEPROMs - Parallel
Memory Type
EEPROM
Memory Size
256K (32K x 8)
Speed
70ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT28HC256-70PI
Manufacturer:
TI
Quantity:
4 510
Part Number:
AT28HC256-70PI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
19. Software Data Protection
Notes:
21. Software Protected Write Cycle Waveforms
Notes:
10
Enable Algorithm
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.
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.
AT28HC256
Address Format: A14 - A0 (Hex).
even if no other data is loaded.
period even if no other data is loaded.
code has been entered.
LOAD LAST BYTE
ANY ADDRESS
ADDRESS 2AAA
LAST ADDRESS
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
LOAD DATA A0
LOAD DATA XX
LOAD DATA 55
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
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
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)
(3)
0007N–PEEPR–9/09