4503B datasheets – compare manufacturers

Manufacturer	Part Number	Description
Toshiba	TC4503BP	HEX Non-Inverting 3-State Buffer
ETC Unknown Manufacturer	4503B	Hex 2 State Buffer
National Semiconductor	CD4503BC	Hex Non-Inverting TRI-STATE Buffer
National Semiconductor	CD4503BM	Hex Non-Inverting TRI-STATE Buffer
Agilent Technologies	HFBR-4503B	Plastic Optical Fiber
ETCTI Texas Instruments	CD4503B	CMOS HEX BUFFER
Motorola Semiconductor	MC14503B	Hex Non-Inverting 3-State Buffer
RCA	CD4503B	CMOS HEX BUFFER
Toshiba	TC4503BF	HEX Non-Inverting 3-State Buffer
ETC Unknown Manufacturer	UPD4503B	Hex 2 State Buffer
Fairchild	CD4503BC	Hex Non-Inverting 3-STATE Buffer
Hitachi Semiconductor	HD14503B	Hex Non-inverting 3-state Buffer
IK Semiconductor	IW4503B	Hex Buffer
Kodenshi AUK Group	KK4503B	Hex Buffer High-Voltage Silicon-Gate CMOS
System Logic Semiconductor	SL4503B	Hex Buffer
ETC Unknown Manufacturer	D4503B	Hex 2 State Buffer
onsemi	MC14503B	Hex Non-Inverting 3-State Buffer
Advanced Power Electronics Corp	AP4503BGM-HF	N AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET
Intersil	CD4503BMS	CMOS Hex Buffer
Advanced Power Electronics Corp	AP4503BGO-HF	N AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET