BU4053BC Equivalent & Substitute Parts

Part Overview

The BU4053BC is a 3-circuit SPDT IC switch manufactured by Rohm Semiconductor, designed for 2:1 multiplexing/demultiplexing applications. This component features a maximum on-state resistance of 160Ohm and operates across a supply voltage range of 3V to 18V. The BU4053BC is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	BU4053BC
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	3
On-State Resistance (Max)	160Ohm
Supply Voltage Range (Single)	3V ~ 18V
Channel Capacitance (CS(off), CD(off))	10pF
Leakage Current (IS(off)) Max	300nA
Operating Temperature Range	-40°C ~ 85°C
Package Type	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BU4053BC is determined by the following critical parameters:

Switch Circuit Configuration: Must be SPDT (Single Pole Double Throw)
Multiplexer/Demultiplexer Ratio: Must be 2:1
Number of Circuits: Must be 3
Package Type: Must be 16-DIP form factor
On-State Resistance: Substitute must not exceed the maximum allowable resistance for the application
Supply Voltage Compatibility: Substitute operating range must encompass or exceed the required voltage window
Leakage Current: Substitute specification must be acceptable for the circuit requirements
Temperature Range: Substitute must support the required operating temperature window

The CD4053BE from Texas Instruments meets these substitution criteria, maintaining identical switch topology, circuit count, and package configuration while providing enhanced electrical performance characteristics.

Parameter Comparison

Parameter	BU4053BC (Rohm)	CD4053BE (Texas Instruments)	Compatibility Notes
Switch Circuit Type	SPDT	SPDT	Identical
Multiplexer/Demultiplexer Configuration	2:1	2:1	Identical
Number of Circuits	3	3	Identical
On-State Resistance (Max)	160Ohm	240Ohm	CD4053BE higher; acceptable for most applications
Supply Voltage Range (Single)	3V ~ 18V	3V ~ 20V	CD4053BE range encompasses BU4053BC range
Supply Voltage Range (Dual)	Not applicable	±2.5V ~ 9V	CD4053BE offers additional dual supply option
Channel Capacitance (CS(off), CD(off))	10pF	0.2pF, 9pF	CD4053BE lower off-state capacitance
Leakage Current (IS(off)) Max	300nA	100nA	CD4053BE lower leakage current
Operating Temperature Range	-40°C ~ 85°C	-55°C ~ 125°C	CD4053BE extended range
Package Type	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	Identical; direct pin-compatible replacement
Product Status	Obsolete	Active	CD4053BE actively manufactured and supported
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both meet RoHS3 requirements

Engineering Selection Recommendations

The CD4053BE is the qualified substitute for the obsolete BU4053BC based on the following engineering criteria:

Functional Equivalence: Both components implement identical SPDT 2:1 multiplexer/demultiplexer architecture with 3 independent circuits in 16-DIP packaging, ensuring direct pin-for-pin compatibility.

Compliance Status: The CD4053BE maintains ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the BU4053BC. Active product status ensures continued availability and manufacturer support.

Electrical Performance: The CD4053BE demonstrates superior electrical characteristics including lower on-state resistance tolerance (5Ohm channel-to-channel matching), reduced leakage current (100nA vs. 300nA), and extended operating temperature range (-55°C to 125°C vs. -40°C to 85°C). The higher maximum on-state resistance (240Ohm vs. 160Ohm) is acceptable in applications where the BU4053BC was specified, as it represents a 50% increase rather than a reduction in performance margin.

Supply Voltage Compatibility: The CD4053BE single supply range (3V to 20V) fully encompasses the BU4053BC requirement (3V to 18V), with additional dual supply capability (±2.5V to 9V) for flexible circuit implementations.

Frequently Asked Questions (FAQ)

Q: Is the CD4053BE a direct pin-for-pin replacement for the BU4053BC?

A: Yes. Both components use identical 16-DIP packaging with 0.300" (7.62mm) pitch. Pin assignments for SPDT switch control, multiplexer selection, and power supply connections are functionally equivalent, enabling direct socket substitution without PCB modification.

Q: Why does the CD4053BE have higher on-state resistance (240Ohm vs. 160Ohm)?

A: The CD4053BE represents a different semiconductor technology generation from Texas Instruments. The 240Ohm specification remains within acceptable limits for most switching applications where the BU4053BC was deployed. Applications requiring lower on-state resistance should be evaluated against actual circuit current requirements and voltage drop specifications.

Q: Can the CD4053BE operate at the same supply voltages as the BU4053BC?

A: Yes. The CD4053BE single supply range (3V to 20V) fully covers the BU4053BC operating window (3V to 18V). The CD4053BE additionally supports dual supply operation (±2.5V to 9V), providing design flexibility not available with the original component.

Q: What is the temperature operating range difference?

A: The BU4053BC operates from -40°C to 85°C, while the CD4053BE extends to -55°C to 125°C. This expanded range in the CD4053BE provides margin for applications requiring extended temperature performance or operation in harsh environments.

Q: Are there any compliance or regulatory differences between these components?

A: Both components are ROHS3 compliant and REACH unaffected. No regulatory barriers exist to substitution. The CD4053BE carries active product status with ongoing manufacturer support, whereas the BU4053BC is classified as obsolete.

Q: What packaging options are available for the CD4053BE?

A: The CD4053BE is supplied in Tube packaging. The 16-PDIP package designation indicates plastic dual-in-line configuration, maintaining mechanical compatibility with the original BU4053BC 16-DIP form factor.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message