BU4066BC Equivalent & Substitute Parts

Part Overview

The BU4066BC is a 4-circuit IC switch manufactured by Rohm Semiconductor, featuring SPST-NO (Single Pole Single Throw - Normally Open) configuration with 1:1 multiplexer/demultiplexer circuit topology. The device operates across a supply voltage range of 3V to 18V with a maximum on-state resistance of 280Ohm and is housed in a 14-DIP through-hole package. The BU4066BC is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer	Rohm Semiconductor
Category	Interface
Switch Circuit Type	SPST - NO
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	280Ohm
Voltage - Supply, Single (V+)	3V ~ 18V
Channel Capacitance (CS(off), CD(off))	10pF
Current - Leakage (IS(off)) (Max)	300nA
Crosstalk	-50dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the BU4066BC is determined by the following critical parameters:

Functional Equivalence Criteria:

Switch circuit type: SPST - NO configuration
Circuit topology: 1:1 multiplexer/demultiplexer
Number of independent circuits: 4
Supply voltage compatibility: 3V ~ 18V operating range
On-state resistance: Maximum 280Ohm
Channel capacitance: 10pF
Leakage current specification: 300nA maximum

Package Compatibility Considerations:

Through-hole mounting requirement (14-DIP package)
Pin count and spacing: 14-DIP (0.300", 7.62mm)

Compliance Requirements:

ROHS3 compliance
MSL rating: 1 (Unlimited)

The substitute parts listed below meet these functional and electrical parameters while offering different product statuses and packaging options. CD4016BM, CD4016BM96, and CD4016BMT are bilateral FET switches with equivalent circuit topology and supply voltage specifications. CD74HC4016E is a through-hole DIP package alternative with enhanced performance characteristics.

Parameter Comparison

Parameter	BU4066BC	CD4016BM	CD4016BM96	CD4016BMT	CD74HC4016E
Manufacturer	Rohm Semiconductor	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Category	Interface	Logic	Logic	Logic	Interface
Circuit Type	SPST - NO	Bilateral, FET Switches	Bilateral, FET Switches	Bilateral, FET Switches	SPST - NO
Number of Circuits	4	4	4	4	4
Circuit Topology	1:1	1 x 1:1	1 x 1:1	1 x 1:1	1:1
On-State Resistance (Max)	280Ohm	-	-	-	170Ohm
Voltage - Supply	3V ~ 18V	3V ~ 18V	3V ~ 18V	3V ~ 18V	2V ~ 10V
Channel Capacitance	10pF	-	-	-	10pF
Current - Leakage (Max)	300nA	-	-	-	100nA
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Last Time Buy	Active	Last Time Buy	Last Time Buy

Engineering Selection Recommendations

For Direct Through-Hole Package Replacement: CD74HC4016E is the primary substitute when through-hole 14-DIP package mounting is required. This part maintains the same physical form factor as the BU4066BC and is classified as ROHS3 compliant. The CD74HC4016E offers superior performance with lower on-state resistance (170Ohm maximum) and reduced leakage current (100nA maximum). However, the supply voltage range is limited to 2V ~ 10V, which is narrower than the BU4066BC specification of 3V ~ 18V. Design verification is necessary when operating above 10V.

For Surface Mount Applications: CD4016BM96 is recommended for new designs requiring surface mount technology. This part is currently in active production status, ensuring long-term availability. CD4016BM96 maintains the 3V ~ 18V supply voltage range and 1:1 circuit topology. The extended operating temperature range (-55°C ~ 125°C) provides broader environmental coverage compared to the BU4066BC (-40°C ~ 85°C).

For Legacy Production Support: CD4016BM and CD4016BMT are available as surface mount alternatives with last-time-buy status. Both parts maintain electrical equivalence with the BU4066BC in terms of supply voltage and circuit configuration.

Compliance Verification: All substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can CD4016BM, CD4016BM96, or CD4016BMT be used as direct replacements for BU4066BC in existing through-hole PCB designs?

A: No. These parts are surface mount devices in 14-SOIC packages, while the BU4066BC uses through-hole 14-DIP packaging. PCB redesign or adapter solutions are required for physical mounting. CD74HC4016E is the appropriate through-hole substitute.

Q: What is the key difference between CD4016BM96 and CD4016BM?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is product status: CD4016BM96 is in active production, while CD4016BM is last-time-buy. CD4016BM96 is recommended for new designs requiring long-term availability.

Q: Is CD74HC4016E fully compatible with BU4066BC in all operating conditions?

A: CD74HC4016E is functionally compatible for applications operating within the 2V ~ 10V supply voltage range. The BU4066BC supports 3V ~ 18V. Applications requiring operation above 10V require alternative solutions or design modification.

Q: Do all substitute parts meet the same compliance standards as BU4066BC?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the BU4066BC compliance profile.

Q: What is the significance of the 1:1 circuit topology in substitution?

A: The 1:1 multiplexer/demultiplexer circuit topology defines the functional switching architecture. All substitute parts maintain this topology, ensuring equivalent signal routing and control characteristics.

Q: Can CD4016BM variants be used in applications requiring the full 3V ~ 18V supply voltage range?

A: Yes. CD4016BM, CD4016BM96, and CD4016BMT all support the 3V ~ 18V supply voltage range, matching the BU4066BC specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message