BU4094BC Equivalent & Substitute Parts

Part Overview

The BU4094BC is an 8-bit shift register manufactured by Rohm Semiconductor, designed for serial-to-parallel data conversion applications. This component belongs to the 4000B logic series and features tri-state output configuration. The BU4094BC is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

BU4094BC

Rohm SemiconductorIn Stock: 2296BU4094BC Datasheet

Current PartRFQ

BU4094BCF-BZE2

Rohm SemiconductorIn Stock: 1226BU4094BCF-BZE2 Datasheet

SimilarRFQ

CD4094BE

Texas InstrumentsIn Stock: 34212CD4094BE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BU4094BC is determined by the following critical parameters:

• Logic Type: Shift Register (8-bit, serial-to-parallel function)
• Output Type: Tri-State configuration
• Number of Elements: 1
• Number of Bits per Element: 8
• Voltage Supply Range: Minimum 3V, maximum 18V
• Operating Temperature Range: Minimum -40°C, maximum 85°C
• RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on mounting technology:

Category 1: Through-Hole Equivalents — Direct pin-compatible replacements maintaining the 16-DIP package format, suitable for PCB designs utilizing through-hole assembly.

Category 2: Surface-Mount Alternatives — Functionally equivalent parts in surface-mount packaging (16-SOP), applicable to designs transitioning to surface-mount technology while maintaining the same logic function and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

CD4094BE (Texas Instruments) — This part provides direct through-hole compatibility with the BU4094BC in 16-DIP packaging. The CD4094BE maintains identical pin configuration and package dimensions, enabling direct socket replacement. The part is currently in active production status with ROHS3 compliance certification. The extended operating temperature range (-55°C ~ 125°C) exceeds the original specification, providing additional thermal margin for demanding applications. Supply availability is substantial at 34,200 units in stock.

BU4094BCF-BZE2 (Rohm Semiconductor) — This surface-mount variant (16-SOP) offers functional equivalence for designs utilizing surface-mount assembly technology. The part maintains the same manufacturer as the original component, ensuring consistency in design lineage. Active product status and ROHS3 compliance are confirmed. The maximum supply voltage specification is 16V, which remains within the lower bound of the original 3V ~ 18V range. This option is suitable for new designs or PCB redesigns incorporating surface-mount technology. Stock availability is 1,135 units.

Frequently Asked Questions (FAQ)

Q: Can the CD4094BE replace the BU4094BC in existing through-hole PCB designs?

A: Yes. The CD4094BE is pin-compatible with the BU4094BC in 16-DIP packaging. Both parts maintain identical pin assignments, package dimensions (0.300", 7.62mm), and electrical function. Direct socket replacement is possible without PCB modification.

Q: What is the primary difference between the CD4094BE and BU4094BCF-BZE2?

A: The primary difference is packaging technology. The CD4094BE uses through-hole 16-DIP packaging suitable for traditional PCB assembly, while the BU4094BCF-BZE2 uses surface-mount 16-SOP packaging for surface-mount assembly processes. Both maintain identical logic function and tri-state output configuration.

Q: Is the BU4094BCF-BZE2 suitable for designs requiring the full 3V ~ 18V supply range?

A: The BU4094BCF-BZE2 supports 3V ~ 16V supply voltage. Applications requiring operation above 16V should use the CD4094BE, which supports the full 3V ~ 18V range specified for the original BU4094BC.

Q: Are all substitute parts RoHS compliant?

A: Yes. Both the CD4094BE and BU4094BCF-BZE2 are ROHS3 compliant, matching the compliance status of the original BU4094BC.

Q: What is the significance of the BU4094BC being classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Rohm Semiconductor. The substitute parts listed (CD4094BE and BU4094BCF-BZE2) are in active production, ensuring long-term availability and supply chain continuity for new designs and legacy system support.

Q: Can the BU4094BCF-BZE2 be used as a direct replacement in through-hole designs?

A: No. The BU4094BCF-BZE2 uses surface-mount 16-SOP packaging and cannot be directly installed in through-hole PCB designs without PCB redesign and assembly process modification. Use the CD4094BE for through-hole applications.