4MBIT(512KBIT Datasheet(PDF) - LH28F400SUN

Manufacturer	Part #	Datasheet	Description
Sharp Corporation	LH28F400SUN	2Mb/43P	4Mbit(512Kbit x 8,256Kbit x 16) 3.3V Flash Memory
	LH28F400SUHT	2Mb/41P	4Mbit(512Kbit x 8,256 Kbit x 16) 5V Single Voltage Flash Memory
	LH28F004SU	2Mb/39P	4Mbit(512Kbit x 8, 256 Kbit x 16) 5V Single Voltage Flash Memory
	LHF04C10	3Mb/48P	4Mbit Flash Memory
Ramtron International C...	FM22L16	189Kb/15P	4Mbit FRAM Memory
SparkFun Electronics	SPX-14764	262Kb/2P	Qwiic EEPROM ??512Kbit 12????9
List of Unclassifed Man...	EN27C512	106Kb/12P	512KBIT EPROM (64K x 8)
Cypress Semiconductor	FM22LD16	434Kb/14P	4Mbit F-RAM Memory
Ramtron International C...	FM22LD16	211Kb/14P	4Mbit F-RAM Memory
Ramtron International C...	FM22LD16	215Kb/14P	4Mbit F-RAM Memory
Cypress Semiconductor	FM22LD16	424Kb/15P	4Mbit F-RAM Memory
Sanyo Semicon Device	LE25CB5122M	256Kb/13P	Serial SPI EEPROM (SPI Bus)(512Kbit)
AMIC Technology	A25P512	673Kb/47P	512Kbit Low Voltage, Serial Flash Memory
Cypress Semiconductor	FM22L16	403Kb/14P	4Mbit Asynchronous F-RAM Memory
AMIC Technology	A25P040	652Kb/45P	4Mbit Low Voltage, Serial Flash Memory
	A25L040A	653Kb/45P	4Mbit Low Voltage, Serial Flash Memory
	A25L512A	661Kb/46P	512Kbit Low Voltage, Serial Flash Memory
	A25LS512A	630Kb/43P	512Kbit Low Voltage, Serial Flash Memory
	A25L040	523Kb/39P	4Mbit Low Voltage, Serial Flash Memory
Elite Semiconductor Mem...	F25L004A	379Kb/32P	4Mbit (512Kx8) 3V Only Serial Flash Memory

4MBIT(512KBIT Datasheet, PDF