Temperature Under Bias................. -55°C to +125°C

Storage Temperature...................... -65°C to +150°C

All Input Voltages

(including NC Pins)

with Respect to Ground ................... -0.6V to +6.25V

All Output Voltages

Voltage on OE

with Respect to Ground ................... -0.6V to +13.5V

*NOTICE: Stresses beyond those listed under “Absolute Maxi-

mum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the

device at these or any other conditions beyond those indi-

cated in the operational sections of this specification is not

implied. Exposure to absolute maximum rating conditions

for extended periods may affect device reliability.

Absolute Maximum Ratings*

Command Definition (in Hex)

(1)

Command

Sequence

Bus

Cycles

1st Bus

Cycle

2nd Bus

Cycle

3rd Bus

Cycle

4th Bus

Cycle

5th Bus

Cycle

6th Bus

Cycle

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read

1Addr

Chip Erase

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

10

Sector

Erase

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

SA

(4, 5)

30

Word

Program

4

5555

AA

2AAA

55

5555

A0

Addr

Boot Block

Lockout

(2)

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

40

Product ID

Entry

3

5555

AA

2AAA

55

5555

90

Product ID

Exit

(3)

3

5555

AA

2AAA

55

5555

F0

Product ID

Exit

(3)

1xxxx

F0

Notes: 1. The DATA FORMAT in each bus cycle is as follows:

I/O15 - I/O8 (Don’t Care); I/O7 - I/O0 (Hex)

2. The 8K word boot sector has the address range

00000H to 01FFFH.

3. Either one of the Product ID Exit commands can

be used.

4. SA = sector addresses:

SA = 03XXX for PARAMETER BLOCK 1

SA = 05XXX for PARAMETER BLOCK 2

SA = 3FXXX for MAIN MEMORY ARRAY

5. When the boot block programming lockout feature

is not enabled, the boot block and the main memory block

will erase together (from the same sector erase command).

Once the boot region has been protected, only the main

memory array sector will erase when its sector erase

command is issued.

HARDWARE DATA PROTECTION: Hardware features

protect against inadvertent programs to the AT49F4096 in

the device will automatically time out 10 ms (typical) be-

fore programming. (c) Program inhibit: holding any one of

OE low, CE high or WE high inhibits program cycles. (d)

Noise filter: pulses of less than 15 ns (typical) on the WE

or CE inputs will not initiate a program cycle.

Device Operation (Continued)

4-222

AT49F4096