MM74HC4046MTCX Phase Lock Loop IC - Equivalent & Substitute Parts

Part Overview

The MM74HC4046MTCX is a Phase Lock Loop (PLL) integrated circuit manufactured by onsemi, designed for clock and timing applications. This component operates at a maximum frequency of 14MHz with a 1:2 input-to-output ratio, featuring CMOS input and 3-State output configuration. The device is housed in a 16-TSSOP surface mount package and currently holds obsolete product status. Due to its obsolescence, identifying functionally compatible substitute parts is necessary for ongoing design support and production continuity.

Key Parameters

Parameter	MM74HC4046MTCX
Manufacturer	onsemi
Type	Phase Lock Loop (PLL)
Frequency - Max	14MHz
Input	CMOS
Output	3-State
Ratio - Input:Output	1:2
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MM74HC4046MTCX are categorized based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Package compatibility: 16-TSSOP surface mount form factor
Supply voltage range: Minimum 2V to 6V overlap
PLL functionality: Phase Lock Loop circuit type
Input/Output signal compatibility: CMOS-based logic levels
Operating temperature range: Overlap with -40°C minimum
Frequency capability: Support for timing applications within specified ranges

Direct substitutes maintain identical or superior electrical characteristics while preserving the 16-TSSOP package footprint. Upgrade substitutes offer enhanced performance specifications or extended operating ranges while maintaining functional compatibility within the PLL category.

Parameter Comparison

Part Number	Manufacturer	Frequency - Max	Input	Output	Ratio - Input:Output	Voltage - Supply	Operating Temperature	Product Status	Package
MM74HC4046MTCX	onsemi	14MHz	CMOS	3-State	1:2	2V ~ 6V	-40°C ~ 85°C	Obsolete	16-TSSOP
CD74HC4046APWR	Texas Instruments	38MHz	CMOS	CMOS	1:4	2V ~ 6V	-55°C ~ 125°C	Active	16-TSSOP
SN74LV4046APW	Texas Instruments	38MHz	CMOS, TTL	CMOS, TTL	1:3	3V ~ 5.5V	-40°C ~ 125°C	Active	16-TSSOP
SN74LV4046APWG4	Texas Instruments	38MHz	CMOS, TTL	CMOS, TTL	1:3	3V ~ 5.5V	-40°C ~ 125°C	Discontinued at DiGi Electronics	16-TSSOP
SN74LV4046APWR	Texas Instruments	38MHz	CMOS, TTL	CMOS, TTL	1:3	3V ~ 5.5V	-40°C ~ 125°C	Active	16-TSSOP
74HC4046APW,118	Nexperia USA Inc.	21MHz	Clock	Clock	2:3	3V ~ 6V	-40°C ~ 125°C	Active	16-TSSOP
CD4046BPW	Texas Instruments	2.4MHz	CMOS	CMOS	1:1	3V ~ 18V	-55°C ~ 125°C	Active	16-TSSOP
CD4046BPWR	Texas Instruments	2.4MHz	CMOS	CMOS	1:1	3V ~ 18V	-55°C ~ 125°C	Active	16-TSSOP
CD74HC4046APW	Texas Instruments	38MHz	CMOS	CMOS	1:4	2V ~ 6V	-55°C ~ 125°C	Active	16-TSSOP
CD74HC4046APWT	Texas Instruments	38MHz	CMOS	CMOS	1:4	2V ~ 6V	-55°C ~ 125°C	Active	16-TSSOP

Engineering Selection Recommendations

Primary Substitutes (Direct Compatibility)

CD74HC4046APWR and CD74HC4046APWT are the most suitable direct substitutes. Both are manufactured by Texas Instruments, maintain the 2V to 6V supply voltage range of the original part, and operate within compatible temperature ranges. These parts feature CMOS input and output, identical 16-TSSOP packaging, and active product status ensuring long-term availability. The higher maximum frequency (38MHz versus 14MHz) provides performance headroom without introducing compatibility issues.

Alternative Substitutes (Extended Capability)

SN74LV4046APW and SN74LV4046APWR offer TTL/CMOS input and output compatibility with active product status. These parts support the 3V to 5.5V supply range, which overlaps with the original 2V to 6V specification. The extended operating temperature range (-40°C to 125°C) exceeds the original specification. These substitutes are suitable for applications where the lower supply voltage floor (3V minimum) does not present a constraint.

Limited Substitutes (Frequency-Dependent Applications)

74HC4046APW,118 (Nexperia) operates at 21MHz maximum frequency and maintains the 3V to 6V supply range with active product status. This part is suitable for applications where the original 14MHz specification is adequate.

CD4046BPW and CD4046BPWR operate at significantly lower maximum frequency (2.4MHz) and are suitable only for low-frequency timing applications. The extended supply voltage range (3V to 18V) provides flexibility for diverse power supply configurations. These parts include divider functionality not present in the original design.

Compliance and Availability

All substitute parts listed carry ROHS3 compliance status and REACH unaffected designation. Moisture sensitivity level remains at MSL 1 (Unlimited) across all alternatives, matching the original specification. Current inventory levels support immediate procurement for all active-status parts.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4046APWR directly replace MM74HC4046MTCX without circuit modification?

A: Yes. Both parts share identical 16-TSSOP packaging, overlapping 2V to 6V supply voltage range, CMOS input compatibility, and PLL functionality. The higher frequency capability (38MHz versus 14MHz) does not create incompatibility. No circuit modifications are required.

Q: What is the difference between SN74LV4046APW and CD74HC4046APWR?

A: The SN74LV4046APW operates at a lower supply voltage range (3V to 5.5V minimum versus 2V minimum) and supports both TTL and CMOS logic levels. The CD74HC4046APWR maintains the original 2V minimum supply voltage and pure CMOS logic. Select SN74LV4046APW only if your circuit operates at 3V or higher.

Q: Are packaging variants (tube, tape & reel, cut tape) electrically equivalent?

A: Yes. Packaging variants (SN74LV4046APW in tube, SN74LV4046APWR in tape & reel, CD74HC4046APWR in cut tape) contain identical die and electrical specifications. Selection depends on procurement quantity and assembly process requirements.

Q: Why is CD4046BPW listed as a substitute when its maximum frequency is only 2.4MHz?

A: CD4046BPW is functionally compatible for low-frequency timing applications where 2.4MHz operation is sufficient. It offers extended supply voltage range (3V to 18V) and includes divider functionality. This part is suitable only for applications not requiring the original 14MHz frequency capability.

Q: What is the significance of product status (Active versus Obsolete)?

A: Active status indicates current manufacturing and long-term availability. Obsolete status (MM74HC4046MTCX) indicates discontinued production. Substitutes with Active status ensure supply chain continuity and support for future production runs.

Q: Can I use SN74LV4046APWG4 for new designs?

A: SN74LV4046APWG4 is discontinued at DiGi Electronics, indicating limited future availability. For new designs, select from parts with Active product status: CD74HC4046APWR, CD74HC4046APWT, SN74LV4046APW, or SN74LV4046APWR.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message