MX29F400CTMI-70GTR
MX29F400C Series 4-MbIT (512K x 8 / 256K x 16) 5V Flash Memory - SOP-44

From MACRONIX

Access Time-Max70 ns
Additional FeatureAutosleep
Memory Density4 Mb
Memory Organization512K x 8 / 256K x 16
Supply Voltage-Nom4.5 to 5.5 V

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