Details, datasheet, quote on part number: TMS28F400AST
CategoryMemory => Flash
Descriptionti TMS28F400AST, 262 144 BY 16-Bit, 524 288 BY 8-Bit Auto-select Boot-block Flash Memory
CompanyTexas Instruments, Inc.
DatasheetDownload TMS28F400AST datasheet


Features, Applications

By 8 Bits By 16 Bits Array-Blocking Architecture One 16K-Byte Protected Boot Block Two 8K-Byte Parameter Blocks One 96K-Byte Main Block Three 128K-Byte Main Blocks Top or Bottom Boot Locations '28F400Axy Offers a User-Defined 8-Bit (Byte) or 16-Bit (Word) Organization '28F004Axy Offers Only the 8-Bit Organization Maximum Access / Minimum Cycle Time Commercial and Extended 5-V VCC 10% 3.3-V VCC ns Automotive (offered for only 5-V VCC voltage configurations) 5-V VCC or Z Depending on VCC / VPP Configuration) or B for Top or Bottom Boot-Block Configuration) 100 000 and 10 000 Program / Erase Cycle Versions Three Temperature Ranges Commercial. 70C Extended. 85C Automotive. to 125C Industry Standard Packages Offered 40-Pin TSOP (DCD Suffix) 44-Pin PSOP (DBJ Suffix) 48-Pin TSOP (DCD Suffix) Low Power Dissipation ( VCC ) Active Write. mW ( Byte Write) Active Read. mW ( Byte Read) Active Write. mW ( Word Write) Active Read. mW ( Word Read) Block Erase. mW Standby. 0.72 mW (CMOS-Input Levels)

PIN NOMENCLATURE A17 BYTE NC RP VCC VPP VSS W DU/WP Address Inputs Byte Enable Data In / Out Data In / Out (word-wide mode), Low-Order Address (byte-wide mode) Chip Enable Output Enable No Internal Connection Reset / Deep Power-Down Power Supply Power Supply for Program / Erase Ground Write Enable Do Not Use for 'AMy or 'AZy /Write Protect

Fully Automated On-Chip Erase and Word / Byte Program Operations Write Protection for Boot Block Industry Standard Command-State Machine (CSM) Erase Suspend/Resume Algorithm-Selection Identifier Three Different Combinations of Supply Voltages Offered All Inputs / Outputs TTL Compatible

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.

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.

Table of Contents description. 3 read operations. device symbol nomenclature. 5 programming operations. functional block diagram. 6 erase operations. architecture. 6 automatic power-saving mode. block memory maps. 6 reset / deep power-down mode. boot-block data protection. 8 power-supply detection. parameter block. 8 absolute maximum ratings. main block. 8 capacitance. data protection. 8 TMS28F004ASy and TMS28F400ASy. command-state machine (CSM). 8 TMS28F004AEy and TMS28F400AEy. operation. 9 TMS28F004AMy and TMS28F400AMy. command definitions. 9 TMS28F004AFy and TMS28F400AFy. status register. 10 TMS28F004AZy and TMS28F400AZy. byte-wide or word-wide mode selection. 11 Parameter Measurement Information. command-state machine (CSM) operations. 13 mechanical data DBJ (R-PDSO-G44). clear status register. 13 mechanical data DCD (R-PDSO-G**).


The by 8 bits by 16 bits 194 304-bit), boot-block flash memory that can be electrically block-erased and reprogrammed. The TMS28F400Axy is organized in a blocked architecture consisting of:

One 16K-byte protected boot block Two 8K-byte parameter blocks One 96K-byte main block Three 128K-byte main blocks

Table 1 lists the five different voltage configurations available for ordering. Operation 256K-word (16-bit) organization is user-definable. Table 1. VCC/VPP Voltage Configurations, Temperature, and Speeds Matrix

DEVICE CONFIGURATION DEVICE TMS28F400AEy TMS28F400AMy READ (VCC) 5 V10% PROGRAM/ERASE (VPP) 12 V10% TEMPERATURE (TA) to 125C Only the 44-pin PSOP is offered in the to 125C temperature range. NOTE 1: All configurations are available in the TMS28F004Axy (8 bit configuration only) and top or bottom boot. ACCESS SPEEDS 5-V(3.3-V) VCC 90 ns


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