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Cross Reference

Parts used for PC BIOS applications can often be exchanged for alternative or equivalent parts made by a different manufacturer. Most EEPROM makers develop and compete for the same markets and have to comply with the same standards

In most cases parts with the same or similar numbers can usually be interchanged. Providing of course they have the same pin outs and are the same kind of device. i.e. FWH (firm ware hub) LPC (low pin count) you would need to replace a firmware hub with a firmware hub, and not an LPC device.

Some chips nowadays will function in both modes the PM49FL004T for instance will function as both an LPC or FWH device.
I would recommend that you check the data sheets for both parts before deciding on a replacement part.
Fitting an incorrect device type can sometimes damage your board and is not recommended, so special care should be taken when choosing a replacement EEPROM.

This information is intended as a guide always check data sheets and make your own assessment, before relying on any the information on this page.

SPI Serial Flash parts are ussually interchangeable. If the eeprom you intend to use as a replacement is the same size and package type as the old part then normally any makers part will do the job. i.e. an 8 Mb SOIC/SOP part from ST or winbond will replace an SST SOIC/SOP part. And the same is true of PDIP parts. The only major difference between these type of parts is the access times. It is always recomended that you do your own appraisal by viewing the data sheets of both components
         

Part

Macronix

Amic

ST

AMD
EN29F002A
MX29F002N
A29002
 M29002 AM29F02B
EN29F040/A
MX29F040
A29040A
 M29F040B AM29F040B
EN29LV040/A
MX29LV040
A29L040
M29W040B AM29LV040B
EN29LV010     M29W010B AM29LV010B

EN29LV400T/B
EN29LV400AT/B
MX29LV400
A29L400
 M29W400BT/B AM29LV400BT/B
EN29LV800AT/B
EN29LV800NT/B
MX29LV800T/B
A29L800
 M29W800DT/B AM29LV800BT/B

Part

SST

Winbond

Intel

PMC
PM49FL002T
49LF002A
W49V002FP
W49V002FAP
    
PM49FL004T
49LF004A
49LF040
49LF040B
      
PM49FL008T
49LF008A
49LF080A
W39V080FAPZ
W39V080APZ
    
SST 29EE020
  
W29C020/C
    
49LF020A
  
W49V002A
    
SST 49LF002A
        
N82802AB
SST 49LF004A
W39V040FA
    
MX29F004T
39SF040
      
SST 25VF080B

W25X80