74HC4049DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC4049DB,112 is a 6-element inverting buffer logic IC manufactured by Nexperia USA Inc. in a 16-SSOP surface mount package. This part operates across a 2V to 6V supply voltage range with push-pull output configuration, suitable for general-purpose logic buffering and inversion applications. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	Buffer, Inverting
Number of Elements	6
Number of Bits per Element	1
Output Type	Push-Pull
Current - Output High, Low	5.2mA, 5.2mA
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	16-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC4049DB,112 is determined by the following critical parameters:

Logic type and functional configuration (6-element inverting buffer)
Output drive capability (5.2mA push-pull output)
Supply voltage range (2V ~ 6V minimum requirement)
Operating temperature range (must support -40°C ~ 125°C minimum)
Surface mount package compatibility
RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories:

Direct Package Substitutes: Parts with identical or compatible package footprints (16-SSOP or 16-TSSOP) that maintain full electrical equivalence.

Parametric Equivalents: Parts meeting all electrical specifications but potentially differing in packaging or availability status.

Parameter Comparison

Part Number	Manufacturer	Package / Case	Logic Type	Output Current (mA)	Supply Voltage	Operating Temp (°C)	Product Status	RoHS Status
74HC4049DB,112	Nexperia USA Inc.	16-SSOP (5.30mm)	Buffer, Inverting	5.2 / 5.2	2V ~ 6V	-40 ~ 125	Obsolete	ROHS3
74HC4049PW,118	Nexperia USA Inc.	16-TSSOP (4.40mm)	Buffer, Inverting	5.2 / 5.2	2V ~ 6V	-40 ~ 125	Active	ROHS3
CD74HC4049PW	Texas Instruments	16-TSSOP (4.40mm)	Buffer, Inverting	5.2 / 5.2	2V ~ 6V	-55 ~ 125	Obsolete	ROHS3
CD74HC4049PWR	Texas Instruments	16-TSSOP (4.40mm)	Buffer, Inverting	5.2 / 5.2	2V ~ 6V	-55 ~ 125	Active	ROHS3
CD74HC4049PWT	Texas Instruments	16-TSSOP (4.40mm)	Buffer, Inverting	5.2 / 5.2	2V ~ 6V	-55 ~ 125	Discontinued at DiGi Electronics	ROHS3

Engineering Selection Recommendations

Primary Substitute: 74HC4049PW,118 (Nexperia USA Inc.)

This part is the preferred substitute for the obsolete 74HC4049DB,112. Both are manufactured by Nexperia and share identical electrical specifications. The 74HC4049PW,118 is currently in active product status with higher inventory availability (5945 pcs). The package transition from 16-SSOP to 16-TSSOP requires PCB layout modification but maintains full functional compatibility. Both parts are ROHS3 compliant with MSL 1 rating.

Secondary Substitute: CD74HC4049PWR (Texas Instruments)

The CD74HC4049PWR provides an alternative from Texas Instruments with active product status and the highest inventory level (8486 pcs). This part offers an extended operating temperature range (-55°C ~ 125°C) compared to the original specification (-40°C ~ 125°C), providing additional thermal margin. The 16-TSSOP package requires the same PCB layout considerations as the primary substitute. ROHS3 compliance is maintained.

Tertiary Options: CD74HC4049PW and CD74HC4049PWT

These Texas Instruments alternatives meet all electrical requirements but have lower inventory availability and discontinued or obsolete status. Selection should be limited to applications where specific packaging or thermal requirements justify the reduced availability.

Frequently Asked Questions (FAQ)

Q: Can I use 74HC4049PW,118 as a direct replacement for 74HC4049DB,112 without design changes?

A: The parts are electrically equivalent with identical output drive capability and supply voltage range. However, the package changes from 16-SSOP to 16-TSSOP, requiring PCB footprint modification. Pin assignments remain compatible.

Q: What is the difference between 16-SSOP and 16-TSSOP packages?

A: Both are 16-pin surface mount packages with different body widths. The 16-SSOP is 5.30mm wide, while the 16-TSSOP is 4.40mm wide. The narrower TSSOP package requires updated PCB layout and solder reflow profiles.

Q: Does the extended temperature range of CD74HC4049PWR (-55°C ~ 125°C) affect compatibility?

A: No. The extended range is a superset of the original specification (-40°C ~ 125°C). Applications designed for the original part will operate within the CD74HC4049PWR's rated range without modification.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 rating, consistent with the original 74HC4049DB,112.

Q: Which substitute has the best availability?

A: CD74HC4049PWR (Texas Instruments) has the highest inventory level at 8486 pcs and active product status, making it the most readily available option for new procurement.

Q: Can I mix different manufacturers in the same design?

A: Yes. All substitutes meet identical electrical specifications for logic type, output drive, and supply voltage. Mixing Nexperia and Texas Instruments parts in the same circuit is functionally compatible.

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