TMS28F400BZT, TMS28F400BZB

524288 BY 8-BIT/262144 BY 16-BIT

BOOT-BLOCK FLASH MEMORIES

SMJS400E – JUNE 1994 – REVISED JANUARY 1998

1

POST OFFICE BOX 1443

262 144 by 16 Bits

– Two 8K-Byte Parameter Blocks

– One 96K-Byte Main Block

– Three 128K-Byte Main Blocks

– One 16K-Byte Protected Boot Block

– Top or Bottom Boot Locations

’28F400BZx80

80 ns

’28F400BZx90

90 ns

(x = top (T) or bottom (B) boot-block

configuration ordered)

– Commercial...0

°C to 70°C

– Extended...– 40

°C to 85°C

– Active Write . . . 330 mW ( Byte Write)

– Active Read... 330 mW ( Byte Read)

– Active Write . . . 358 mW ( Word Write)

– Active Read... 330 mW ( Word Read)

– Block Erase... 165 mW

– Standby... 0.55 mW (CMOS-Input

Levels)

– Deep Power-Down Mode... 0.0066 mW

Word / Byte-Program Operations

(CSM)

– Erase Suspend/Resume

– Algorithm-Selection Identifier

description

The TMS28F400BZx is a 524 288 by 8-bit / 262 144 by 16-bit (4 194 304-bit), boot-block flash memory that can

be electrically block-erased and reprogrammed. The TMS28F400BZx is organized in a blocked architecture

consisting of one 16K-byte protected boot block, two 8K-byte parameter blocks, one 96K-byte main block, and

three 128K-byte main blocks. The device can be ordered with either a top or bottom boot-block configuration.

Operation as a 512K-byte (8-bit) or a 256K-word (16-bit) organization is user-definable.

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.

23

PIN NOMENCLATURE

A0 – A17

Address Inputs

BYTE

Byte Enable

DQ0 – DQ14

Data In / Out

DQ15/A –1

Data In / Out (word-wide mode),

Low-Order Address (byte-wide mode)

E

Chip Enable

G

Output Enable

NC

No Internal Connection

RP

Reset / Deep Power Down

VCC

5-V Power Supply

VPP

12-V Power Supply for

Program / Erase

VSS

Ground

W

Write Enable

DBJ PACKAGE

( TOP VIEW )

NC

A17

A7

A6

A5

A4

A3

A2

A1

A0

E

G

DQ0

DQ8

DQ1

DQ9

DQ2

DQ10

RP

W

A8

A9

A10

A11

A12

A13

A14

A15

A16

BYTE

DQ7

DQ14

DQ6

DQ13

DQ5

DQ12

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

19

20

26

25

DQ3

DQ11

DQ4

21

22

24

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