Where can I buy MC100EL52DTR2?

MC100EL52DTR2 is available from Digi-Key, Digi-Key, Hotenda. See pricing comparison above.

MC100EL52DTR2 onsemi | Integrated Circuits (ICs) | DigiKey

Brand name, Manufacturer name, Manufacturer, Attribute01	onsemi
Attribute00	Integrated Circuits (ICs)
Attribute02	100EL
Attribute03	Tape & Reel (TR)
Attribute04	Obsolete
Attribute05	Standard
Attribute06	D-Type
Attribute07	Complementary
Attribute08, Attribute09, atoms, moq, multiple	1
Attribute10	2.8 GHz
Attribute11, Attribute13	-
Attribute12	Positive, Negative
Attribute14	-4.2V ~ -5.7V
Attribute15	25 mA
Attribute16	-40?C ~ 85?C (TA)
Attribute17	Surface Mount
Attribute18	8-TSSOP
Attribute19	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Attribute20	MC100EL52
AttributeKey00	Category
AttributeKey01	Mfr
AttributeKey02	Series
AttributeKey03	Package
AttributeKey04	Part Status
AttributeKey05	Function
AttributeKey06	Type
AttributeKey07	Output Type
AttributeKey08	Number of Elements
AttributeKey09	Number of Bits per Element
AttributeKey10	Clock Frequency
AttributeKey11	Max Propagation Delay @ V, Max CL
AttributeKey12	Trigger Type
AttributeKey13	Current - Output High, Low
AttributeKey14	Voltage - Supply
AttributeKey15	Current - Quiescent (Iq)
AttributeKey16	Operating Temperature
AttributeKey17	Mounting Type
AttributeKey18	Supplier Device Package
AttributeKey19	Package / Case
AttributeKey20	Base Product Number
Extra Product Name	MC100EL52DTR2 onsemi \| Integrated Circuits (ICs) \| DigiKey
extraShipping, qtyInStock	0
MPN	MC100EL52DTR2
SKU	1477481

Seller	SKU	MOQ	Multiple
Digi-Key	1477481	1	1
Digi-Key	MC100EL52DTR2-ND	1	1
Hotenda	H2540387	1	1