TMS29F040

524288 BY 8BIT

FLASH MEMORY

SMJS820C − APRIL 1996 − REVISED JUNE 1998

1

POST OFFICE BOX 1443

− 3.3 V

± 0.3 V − See TMS29LF040/

TMS29VF040 Data Sheet (Literature

Number SMJS825)

− 2.7 V to 3.6 V − See TMS29LF040 /

TMS29VF040 Data Sheet

− Any Combination of Sectors Can Be

Erased

− Any Combination of Sectors Can Be

Marked as Read-Only

Erasable Programmable Read-Only

Memory (EEPROM) Command Set

Byte-Program Operations

− Active Read . . . 20 mA Typical

− Active Program / Erase . . . 30 mA Typical

description

The TMS29F040 is a 524288 by 8-bit (4194304-bit), 5-V single-supply, programmable read-only memory that

can be electrically erased and reprogrammed. This device is organized as eight independent 64K-byte sectors

and is offered with access times between 60 ns and 120 ns.

An on-chip state machine controls the program and erase operations. The embedded byte-program and

sector / chip-erase functions are fully automatic. The command set is compatible with that of JEDEC 4M-bit

EEPROMs. A suspend / resume feature allows access to unaltered memory sectors during a sector-erase

operation. Data-protection of any sector combination is accomplished using a hardware sector-protection

feature.

Device operations are selected by writing JEDEC-standard commands into the command register using

standard microprocessor write timings. The command register acts as input to an internal-state machine that

interprets the commands, controls the erase and programming operations, and outputs the status of the device,

the data stored in the device, and the device algorithm-selection code. On initial power-up operation, the device

defaults to the read mode.

The TMS29F040 is offered in a 32-pin plastic leaded chip carrier (FM suffix) using 1.27-mm (50-mil) lead pitch

and a 32-pin thin small-outline package (DD suffix).

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

A[0:18]

Address Inputs

DQ[0:7]

Inputs (programming) / Outputs

E

Chip Enable

G

Output Enable

VCC

5-V Power Supply

V

SS

Ground

W

Write Enable

PIN NOMENCLATURE

32 1 32 31

14

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

A14

A13

A8

A9

A11

G

A10

E

DQ7

A7

A6

A5

A4

A3

A2

A1

A0

DQ0

430

15 16 17 18 19

FM PACKAGE

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PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

 1998, Texas Instruments Incorporated