BU4052BC Equivalent & Substitute Parts

Part Overview

The BU4052BC is a 2-circuit SP4T IC switch manufactured by Rohm Semiconductor, designed for analog signal routing applications requiring 4:1 multiplexing/demultiplexing functionality. This component operates across a supply voltage range of 3V to 18V with a maximum on-state resistance of 160Ohm and is housed in a 16-DIP package. The BU4052BC is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	BU4052BC
Switch Circuit Configuration	SP4T
Multiplexer/Demultiplexer Circuit	4:1
Number of Circuits	2
On-State Resistance (Max)	160Ohm
Voltage - Supply, Single (V+)	3V ~ 18V
Channel Capacitance (CS(off), CD(off))	10pF
Current - Leakage (IS(off)) (Max)	300nA
Operating Temperature	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the BU4052BC is determined by the following mandatory parameters:

Switch circuit configuration must be SP4T
Multiplexer/demultiplexer circuit must be 4:1
Number of circuits must be 2
Package must be 16-DIP (0.300", 7.62mm)
On-state resistance must not exceed the application requirement (160Ohm maximum for BU4052BC)
Operating temperature range must encompass or exceed -40°C to 85°C
Supply voltage compatibility must be verified for the specific application

The identified substitute parts meet these core functional and mechanical requirements while offering variations in electrical performance characteristics such as on-state resistance, leakage current, and bandwidth capabilities.

Parameter Comparison

Parameter	BU4052BC (Rohm)	CD74HC4052E (Texas Instruments)	CD74HCT4052E (Harris)	TC74HC4052APF (Toshiba)
Switch Circuit	SP4T	SP4T	SP4T	SP4T
Multiplexer/Demultiplexer Circuit	4:1	4:1	4:1	4:1
Number of Circuits	2	2	2	2
On-State Resistance (Max)	160Ohm	130Ohm	130Ohm	100Ohm
Channel Capacitance (CS(off), CD(off))	10pF	12pF	5pF, 12pF	2pF, 40pF
Current - Leakage (IS(off)) (Max)	300nA	200nA	200nA	100nA
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant
Product Status	Obsolete	Last Time Buy	Obsolete	Active

Engineering Selection Recommendations

CD74HC4052E (Texas Instruments) is classified as Last Time Buy with ROHS3 compliance, offering improved electrical performance over the BU4052BC with lower on-state resistance (130Ohm) and reduced leakage current (200nA). This part supports extended operating temperature range (-55°C to 125°C) and dual supply voltage operation (±1V to 5V), providing design flexibility for applications requiring broader environmental specifications.

CD74HCT4052E (Harris Corporation) is obsolete and RoHS non-compliant, limiting its suitability for new designs or systems requiring regulatory compliance. This part should be considered only for legacy system maintenance where supply voltage is constrained to 4.5V to 5.5V.

TC74HC4052APF (Toshiba Semiconductor and Storage) maintains active product status with ROHS3 compliance, offering the lowest on-state resistance (100Ohm) and leakage current (100nA) among available substitutes. This part is recommended for new designs requiring optimal switching performance and long-term component availability. Operating temperature range matches the BU4052BC (-40°C to 85°C), and supply voltage compatibility spans 2V to 6V for single supply or ±2V to 6V for dual supply operation.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4052E directly replace BU4052BC in existing designs?

A: Yes, CD74HC4052E is mechanically and functionally compatible. Both parts share identical SP4T 4:1 switch configuration, 2-circuit architecture, and 16-DIP package. The lower on-state resistance (130Ohm vs 160Ohm) and reduced leakage current (200nA vs 300nA) represent performance improvements. Verify supply voltage compatibility: CD74HC4052E operates at 2V to 6V single supply or ±1V to 5V dual supply, whereas BU4052BC operates at 3V to 18V single supply.

Q: What are the key differences between CD74HC4052E and TC74HC4052APF?

A: Both parts are functionally equivalent with identical switch configuration and package. TC74HC4052APF offers superior electrical performance with lower on-state resistance (100Ohm vs 130Ohm) and lower leakage current (100nA vs 200nA). TC74HC4052APF maintains active product status, ensuring long-term availability. CD74HC4052E is classified as Last Time Buy, indicating limited future supply.

Q: Is CD74HCT4052E suitable for new designs?

A: No. CD74HCT4052E is obsolete and RoHS non-compliant. This part should be used only for legacy system maintenance where component replacement is necessary and supply voltage is constrained to 4.5V to 5.5V.

Q: What supply voltage range should I verify before substitution?

A: The BU4052BC operates at 3V to 18V single supply. CD74HC4052E and TC74HC4052APF both support 2V to 6V single supply operation. If your application requires supply voltages above 6V, verify that the substitute part's dual supply mode (±1V to 5V for CD74HC4052E or ±2V to 6V for TC74HC4052APF) is compatible with your circuit topology.

Q: Are all substitute parts available in 16-DIP package?

A: Yes. All identified substitute parts are available in 16-DIP (0.300", 7.62mm) package configuration, ensuring mechanical compatibility with BU4052BC footprints.

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