The M29W004B is a 4 Mbit (512Kb x8) non-volatile memory that can be read, erased and reprogrammed. These operations can be performed using a single low voltage (2.7 to 3.6V) supply. On power-up the memory defaults to its Read mode where it can be read in the same way as a ROM or EPROM. The M29W004B is fully backward compatible with the M29W004.
The memory is divided into blocks that can be erased independently so it is possible to preserve valid data while old data is erased. Each block can be protected independently to prevent accidental Program or Erase commands from modifying the memory. Program and Erase commands are written to the Command Interface of the memory. An on-chip Program/Erase Controller simplifies the process of programming or erasing the memory by taking care of all of the special operations that are required to update the memory contents. The end of a program or erase operation can be detected and any error conditions identified. The command set required to control the memory is consistent with JEDEC standards.
The blocks in the memory are asymmetrically arranged, see Tables 3 and 4, Block Addresses. The first or last 64 Kbytes have been divided into four additional blocks. The 16 Kbyte Boot Block can be used for small initialization code to start the microprocessor, the two 8 Kbyte Parameter Blocks can be used for parameter storage and the remaining 32 Kbyte is a small Main Block where the application may be stored.
Chip Enable, Output Enable and Write Enable signals control the bus operation of the memory. They allow simple connection to most microprocessors, often without additional logic.
The memory is offered in a TSOP40 (10 x 20mm) package and it is supplied with all the bits erased (set to '1').
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SINGLE 2.7 to 3.6V SUPPLY VOLTAGE for PROGRAM, ERASE and READ OPERATIONSACCESS TIME: 55nsPROGRAMMING TIME 10s by Byte typical11 MEMORY BLOCKS 1 Boot Block (Top or Bottom Location) 2 Parameter and 8 Main BlocksPROGRAM/ERASE CONTROLLER Embedded Byte Program algorithm Embedded Multi-Block/Chip Erase algorithm Status Register Polling and Toggle Bits Ready/Busy Output PinERASE SUSPEND and RESUME MODES Read and Program another Block during Erase SuspendTEMPORARY BLOCK UNPROTECTION MODEUNLOCK BYPASS PROGRAM COMMAND Faster Production/Batch ProgrammingLOW POWER CONSUMPTION Standby and Automatic Standby100,000 PROGRAM/ERASE CYCLES per BLOCK20 YEARS DATA RETENTION Defectivity below 1 ppm/yearELECTRONIC SIGNATURE Manufacturer Code: 20h Top Device Code M29W004BT: EAh Bottom Device Code M29W004BB: EBh
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SYMBOL |
PARAMETER |
Value |
Units |
|
TA |
Ambient Operating Temperature (Temperature Range Option 1) |
0 to 70 |
°C |
|
Ambient Operating Temperature (Temperature Range Option 6) |
40 to 85 |
°C |
|
TBIAS |
Temperature Under Bias |
50 to 125 |
°C |
|
TSTG |
Storage Temperature |
65 to 150 |
°C |
|
VIO(2) |
Input or Output Voltage |
0.6 to 4 |
V |
|
VCC |
Supply Voltage |
0.6 to 4 |
V |
|
VID |
Identification Vol
Post a Buying Lead
File Size: 161103 KB
Manufacturer: STMICROELECTRONICS [STMicroelectronics]
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