- Sierra IC Inc. will be closed for the holiday season from December 20, 2025 through January 4, 2026, and will resume normal business operations on January 5, 2026.    

 

Sierra IC Inc., a global independent distributor, specializes in integrated circuits, active and passive components, connectors, and discrete electromechanical parts.

Semiconductors and Actives Logic-Comparator Sierra IC Catalog Page 3

Part Number Manufacturer
Page 3 of 28
74AC521PC
74AC Series 5 V CMOS DIP20 8 Bit Identity Comparator
Fairchild-Semiconductor
74AC521SC
74AC Series 5 V CMOS SOIC20 8 Bit Identity Comparator
Fairchild-Semiconductor
74AC521SCX
74AC Series 5 V CMOS SOIC20 8 Bit Identity Comparator
Fairchild-Semiconductor
74AC521SJ
COMPARATOR, 8-BIT, IDENTITY
Fairchild-Semiconductor
74AC521SJX
Identity Comparator 8-Bit 20-Pin SOP T/R
Fairchild-Semiconductor
74ACT521MTC
Identity Comparator 8-Bit 20-Pin TSSOP Rail
Fairchild-Semiconductor
74ACT521MTCX
Identity Comparator 8-Bit 20-Pin TSSOP T/R
Fairchild-Semiconductor
74ACT521PC
Identity Comparator 8-Bit 20-Pin PDIP Rail
Fairchild-Semiconductor
74ACT521SC
Identity Comparator 8-Bit 20-Pin SOIC Rail
Fairchild-Semiconductor
74ACT521SCX
74ACT Series 5 V CMOS SOIC20 8 Bit Identity Comparator
Fairchild-Semiconductor
74ACT521SJ
COMPARATOR, 8-BIT, IDENTITY
Fairchild-Semiconductor
74F521MSA
Identity Comparator 8-Bit 20-Pin SSOP Rail
Fairchild-Semiconductor
74F521MSAX
74F521MSAX
Fairchild-Semiconductor
74F521PC
Identity Comparator 8-Bit 20-Pin PDIP Rail
Fairchild-Semiconductor
74F521SC
Identity Comparator 8-Bit 20-Pin SOIC Rail
Fairchild-Semiconductor

Contact Info

SIERRA IC, INC.
16151 Lancaster Hwy
Charlotte NC 28277

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