Details

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BUY AT29C256-70JI https://www.utsource.net/itm/p/12606989.html

Parameter	Description	Value
Device Type	High Performance CMOS 32K x 8-Bit Flash Memory	AT29C256-70JI
Package Type	JEDEC SOJ (Shrink Outline J-Lead)	SOJ
Supply Voltage VCC	Operating Supply Voltage	2.7V to 5.5V
Access Time tACC	Access Time at VCC = 5.0V, TA = 25掳C	70ns
Data Retention	Data Retention Time	10 years
Endurance	Write/Erase Cycle Endurance	100,000 cycles
Temperature Range	Operating Temperature Range	-40掳C to +85掳C
Programming Voltage	Programming Supply Voltage	VPP = 12.0V
Chip Enable	Active Low Chip Enable Pin	CE#
Output Enable	Active Low Output Enable Pin	OE#
Write Enable	Active Low Write Enable Pin	WE#
Protection Pin	Hardware Write Protect Pin	WP#
Organization	Memory Organization	32K x 8

Instructions for Use:

1. Power Supply Connections:

   • Connect VCC to the positive supply voltage (2.7V to 5.5V).
   • Connect GND to the system ground.

2. Signal Connections:

   • CE# (Chip Enable): Set low to enable the device.
   • OE# (Output Enable): Set low to enable data outputs during read operations.
   • WE# (Write Enable): Set low during write operations.
   • WP# (Write Protect): Set low to allow write operations; high to protect against accidental writes.

3. Programming:

   • Apply VPP = 12.0V to the programming pin during write operations.
   • Follow the specific timing and sequence requirements for writing data as detailed in the datasheet.

4. Read Operation:

   • Ensure CE# and OE# are low.
   • Present the address on the address lines.
   • The data will appear on the data lines after the specified access time.

5. Write Operation:

   • Ensure CE#, WE#, and WP# are properly set.
   • Apply VPP.
   • Follow the protocol for loading the address and data, then execute the write cycle.

6. Erase Operation:

   • Erase operations typically involve applying specific voltages and following a sequence of commands to erase sectors or the entire chip.

7. Handling Precautions:

   • Handle with care to avoid static damage.
   • Ensure proper heat sinking if operating at higher temperatures or under heavy load conditions.

Refer to the full datasheet for more detailed information and specific timing diagrams.

(For reference only)