TMS28F004Axy, TMS28F400Axy 524288 BY 8-BIT/262144 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES

SMJS829A - JANUARY 1996 - REVISED AUGUST 1997

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

features

• Organization... 524288 By 8 Bits 262144 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
  • Automotive (offered for only 5-V V_CC voltage configurations)
• 100000 and 10000 Program/Erase Cycle Versions
• Three Temperature Ranges
  • Commercial...0°C to 70°C
  • Extended...- 40°C to 85°C
  • Automotive...- 40°C to 125°C
• Industry Standard Packages Offered in
  • 40-Pin TSOP (DCD Suffix)
  • 44-Pin PSOP (DBJ Suffix)
  • 48-Pin TSOP (DCD Suffix)
• Low Power Dissipation (V_CC = 5.5 V)
  • Active Write...248 mW (Byte Write)
  • Active Read...330 mW (Byte Read)
  • Active Write...248 mW (Word Write)
  • Active Read...330 mW (Word Read)
  • Block Erase...165 mW
  • Standby...0.72 mW (CMOS-Input Levels)
• 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

description

The TMS28F400Axy is a 524288 by 8 bits/262144 by 16 bits (4194304-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 as a 512K-byte (8-bit) or a 256K-word (16-bit) organization is user-definable.

The TMS28F004Axy is offered in a 512K-byte organization only. The operation for this device is the same as the TMS28F400Axy and is offered in the same voltage configurations. TMS28F004Axy can be substituted for the byte-wide TMS28F400Axy with the latter being the generic name for this device family.

Embedded program and block-erase functions are fully automated by the on-chip write state machine (WSM), simplifying these operations and relieving the system microcontroller of secondary tasks. WSM status can be monitored by an on-chip status register to determine progress of program/erase tasks. The device features user-selectable block erasure.

The configurations are as follows:

• The TMS28F400ASy configuration has the auto-select feature that allows the user alternative read and program/erase voltages. Memory reads can be performed using 3.3-V V_CC for optimum power consumption or 5-V V_CC for device performance. Erasing or programming the device can be accomplished with 5-V V_PP, which eliminates having to use a 12-V source and/or in-system voltage converters. Alternatively,12-V V_PP operation exists for systems that already have a 12-V power supply, which provides faster programming and erasing times. This configuration is offered in two temperature ranges: 0°C to 70°C and -40°C to 85°C.
• The TMS28F400AEy configuration offers the auto-select feature of the TMS28F400ASy with an extended V_CC range of 2.7-V to 3.6-V (3-V nominal). Memory reads can be performed using 3-V V_CC, for more efficient power consumption than the 'ASy device.
• The TMS28F400AMy configuration offers a 3-V or 5-V memory read with a 12-V program and erase. This configuration is intended for low 3.3-V reads and the fast programming offered with the 12-V V_PP and 5-V V_CC. This configuration is offered in two temperature ranges: 0°C to 70°C and - 40°C to 85°C.
• The TMS28F400AFy configuration offers a 5-V memory read with a 5-V or 12-V program and erase. This configuration is intended for systems using a single 5-V power supply. This configuration is offered in three temperature ranges: 0°C to 70°C, - 40°C to 85°C, and - 40°C to 125°C.
• The TMS28F400AZy configuration offers a 5-V memory read with a 12-V program and erase for fast programming and erasing times. This configuration is offered in three temperature ranges: 0°C to 70°C, -40°C to 85°C, and - 40°C to 125°C.

The y in the device name represents a T for top or B for bottom boot-block configuration.

All configurations of the TMS28F400Axy are offered in a 44-pin plastic small-outline package (PSOP) and a 48-pin thin small-outline package (TSOP). The TMS28F004Axy is offered in a 40-pin TSOP only. Both the 40-pin and 48-pin TSOP are offered for the 0°C to 70°C and - 40°C to 85°C temperature ranges only.

View more information about generic part numbers:TMS28F004AEB, TMS28F004AET, TMS28F004AFB, TMS28F004AFT, TMS28F004AMB, TMS28F004AMT, TMS28F004ASB, TMS28F004AST, TMS28F004AZB, TMS28F004AZT, TMS28F400AEB, TMS28F400AET, TMS28F400AFB, TMS28F400AFT, TMS28F400AMB, TMS28F400AMT, TMS28F400ASB, TMS28F400AST, TMS28F400AZB, TMS28F400AZT

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