MM74HC4046MTC Phase Lock Loop IC Equivalent & Substitute Parts

Part Overview

The MM74HC4046MTC is a Phase Lock Loop (PLL) integrated circuit manufactured by onsemi, housed in a 16-TSSOP surface mount package. This device operates at a maximum frequency of 14MHz with a 1:2 input-to-output ratio and supports supply voltages from 2V to 6V. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Key Parameters

Parameter	MM74HC4046MTC
Manufacturer	onsemi
Type	Phase Lock Loop (PLL)
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Frequency - Max	14MHz
Ratio - Input:Output	1:2
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Input / Output Type	CMOS / 3-State
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MM74HC4046MTC is determined by compatibility across the following critical parameters:

Package Compatibility: All substitute parts maintain the 16-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical and electrical pin compatibility.

Voltage Supply Range: The original part operates within 2V to 6V. Substitute parts must support this range or a compatible superset. Parts with narrower ranges (such as 3V to 5.5V) remain compatible within the original operating window.

Frequency Performance: The MM74HC4046MTC operates at 14MHz maximum. Substitute parts with equal or higher frequency ratings maintain functional compatibility.

Input/Output Signaling: The original part uses CMOS input with 3-State output. Substitute parts using CMOS or TTL-compatible signaling remain functionally compatible.

Mounting and Environmental: All parts are surface mount with MSL rating of 1 (Unlimited), supporting identical assembly and storage requirements.

Parameter Comparison

Part Number	Manufacturer	Frequency - Max	Voltage - Supply	Ratio - Input:Output	Input / Output	Operating Temperature	Product Status	Package
MM74HC4046MTC	onsemi	14MHz	2V ~ 6V	1:2	CMOS / 3-State	-40°C ~ 85°C	Obsolete	16-TSSOP
CD74HC4046APWR	Texas Instruments	38MHz	2V ~ 6V	1:4	CMOS / CMOS	-55°C ~ 125°C	Active	16-TSSOP
SN74LV4046APW	Texas Instruments	38MHz	3V ~ 5.5V	1:3	CMOS, TTL / CMOS, TTL	-40°C ~ 125°C	Active	16-TSSOP
SN74LV4046APWG4	Texas Instruments	38MHz	3V ~ 5.5V	1:3	CMOS, TTL / CMOS, TTL	-40°C ~ 125°C	Discontinued at DiGi Electronics	16-TSSOP
SN74LV4046APWR	Texas Instruments	38MHz	3V ~ 5.5V	1:3	CMOS, TTL / CMOS, TTL	-40°C ~ 125°C	Active	16-TSSOP
74HC4046APW,118	Nexperia USA Inc.	21MHz	3V ~ 6V	2:3	Clock / Clock	-40°C ~ 125°C	Active	16-TSSOP
CD4046BPW	Texas Instruments	2.4MHz	3V ~ 18V	1:1	CMOS / CMOS	-55°C ~ 125°C	Active	16-TSSOP
CD4046BPWR	Texas Instruments	2.4MHz	3V ~ 18V	1:1	CMOS / CMOS	-55°C ~ 125°C	Active	16-TSSOP
CD74HC4046APW	Texas Instruments	38MHz	2V ~ 6V	1:4	CMOS / CMOS	-55°C ~ 125°C	Active	16-TSSOP
CD74HC4046APWT	Texas Instruments	38MHz	2V ~ 6V	1:4	CMOS / CMOS	-55°C ~ 125°C	Active	16-TSSOP

Engineering Selection Recommendations

Primary Substitutes (Direct Compatibility):

CD74HC4046APWR and CD74HC4046APWT are the most direct substitutes. Both maintain the 2V to 6V supply voltage range of the original part, support CMOS signaling, and are housed in the identical 16-TSSOP package. These parts are manufactured by Texas Instruments and carry Active product status with ROHS3 compliance. The higher frequency rating (38MHz versus 14MHz) and extended temperature range (-55°C to 125°C) provide enhanced performance margins.

Secondary Substitutes (Voltage Range Consideration):

SN74LV4046APW and SN74LV4046APWR operate within a narrower supply voltage range (3V to 5.5V) compared to the original 2V to 6V specification. These parts are suitable for applications where the supply voltage remains within the 3V to 5.5V window. Both are Active products from Texas Instruments with ROHS3 compliance. The SN74LV4046APWR is available in Tape & Reel packaging with higher inventory levels.

Alternative Substitutes (Frequency and Ratio Differences):

74HC4046APW,118 (Nexperia) operates at 21MHz with a 2:3 input-to-output ratio, differing from the original 1:2 ratio. This part is suitable only for applications where the frequency and ratio specifications can accommodate these differences.

CD4046BPW and CD4046BPWR operate at significantly lower frequencies (2.4MHz) with a 1:1 input-to-output ratio. These parts are suitable only for low-frequency applications and should not be used as direct replacements for the MM74HC4046MTC in circuits requiring 14MHz operation.

Packaging Considerations:

All substitute parts are available in standard packaging formats (Tube, Tape & Reel, or Cut Tape). Selection should be based on procurement and assembly requirements rather than functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC4046APWR as a direct replacement for MM74HC4046MTC?

A: Yes. Both parts maintain the 2V to 6V supply voltage range, 16-TSSOP package, and CMOS signaling. The CD74HC4046APWR offers higher frequency capability (38MHz) and extended temperature range, making it functionally compatible and performance-enhanced.

Q: What is the key difference between CD74HC4046APWR and SN74LV4046APWR?

A: The primary difference is the supply voltage range. CD74HC4046APWR operates from 2V to 6V, matching the original part's range. SN74LV4046APWR operates from 3V to 5.5V, which is narrower. Both support 38MHz operation and are housed in 16-TSSOP packages. Selection depends on whether your application requires operation below 3V.

Q: Why is the frequency rating higher on substitute parts?

A: Substitute parts such as CD74HC4046APWR and SN74LV4046APWR are designed with higher frequency capability (38MHz) than the original MM74HC4046MTC (14MHz). This does not create incompatibility; circuits designed for 14MHz operation function correctly with parts rated for higher frequencies.

Q: Can I use CD4046BPW as a substitute?

A: CD4046BPW is not a direct substitute. It operates at 2.4MHz maximum frequency and has a 1:1 input-to-output ratio, compared to the MM74HC4046MTC's 14MHz and 1:2 ratio. Use CD4046BPW only in applications specifically designed for low-frequency operation below 2.4MHz.

Q: What does the packaging designation mean (Tube, Tape & Reel, Cut Tape)?

A: Packaging designations indicate the physical format for component delivery and assembly. Tube packaging is suitable for manual assembly. Tape & Reel (TR) and Cut Tape (CT) formats are designed for automated pick-and-place assembly. All formats contain identical components; selection is based on manufacturing process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification, meeting environmental and material restriction requirements for modern electronics manufacturing.

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