BU4070BF-E2 Equivalent & Substitute Parts

Part Overview

The BU4070BF-E2 is a 4-channel XOR (Exclusive OR) logic IC manufactured by Rohm Semiconductor in 14-SOP packaging. This device operates across a supply voltage range of 3V to 16V and is designed for digital logic applications requiring exclusive OR gate functionality. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

BU4070BF-E2

Rohm SemiconductorIn Stock: 1139BU4070BF-E2 Datasheet

Current PartRFQ

CD4070BM

Texas InstrumentsIn Stock: 1382CD4070BM Datasheet

SimilarRFQ

CD4070BM96

Texas InstrumentsIn Stock: 37912CD4070BM96 Datasheet

SimilarRFQ

CD4070BMT

Texas InstrumentsIn Stock: 1250CD4070BMT Datasheet

SimilarRFQ

HEF4070BT,653

Nexperia USA Inc.In Stock: 2020HEF4070BT,653 Datasheet

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MC14070BDG

onsemiIn Stock: 3621MC14070BDG Datasheet

SimilarRFQ

MC14070BDR2G

onsemiIn Stock: 65284MC14070BDR2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BU4070BF-E2 is determined by the following critical parameters:

• Logic Type: Must be XOR (Exclusive OR) with 4 channels and 2 inputs per channel
• Voltage Supply Range: Must encompass or overlap with 3V ~ 16V operating range
• Input/Output Logic Levels: Must be compatible with 1.5V ~ 4V (low) and 4.6V ~ 11V (high) thresholds
• Mounting Type: Surface Mount required
• Package Compatibility: 14-pin SOIC variants acceptable
• Compliance: ROHS3 compliant, MSL 1 rating

All identified substitute parts belong to the 4000B logic series and meet these core substitution criteria. Variations in propagation delay, quiescent current, and output drive capability are secondary considerations dependent on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CD4070BM96 (Texas Instruments)

CD4070BM96 is the preferred substitute due to active product status, highest inventory availability (37,900 pcs), and Cut Tape & Digi-Reel packaging options. This part maintains full functional equivalence with extended operating temperature range (-55°C ~ 125°C) and supply voltage compatibility (3V ~ 18V). ROHS3 compliance and MSL 1 rating ensure regulatory and environmental compatibility.

Secondary Recommendation: MC14070BDR2G (onsemi)

MC14070BDR2G offers active status with substantial inventory (65,200 pcs) and Tape & Reel packaging. Supply voltage range (3V ~ 18V) and logic level thresholds match substitution requirements. Higher output drive capability (8.8mA) may benefit applications requiring increased fan-out. Extended operating temperature (-55°C ~ 125°C) provides broader environmental coverage than the original part.

Alternative Option: HEF4070BT,653 (Nexperia USA Inc.)

HEF4070BT,653 maintains active product status with 2,000 pcs inventory. Operating temperature range (-40°C ~ 85°C) and supply voltage (3V ~ 15V) align with original BU4070BF-E2 specifications. Propagation delay (55ns) falls between the original part and other substitutes, offering moderate speed performance. Tape & Reel packaging supports automated assembly.

Obsolete Parts (Not Recommended for New Designs):

CD4070BM and CD4070BMT are classified as discontinued or obsolete and should not be selected for new designs despite functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can CD4070BM96 directly replace BU4070BF-E2 in existing designs?

A: Yes. Both parts are 4-channel XOR logic ICs with identical logic type, circuit count, and input configuration. Input/output logic levels and supply voltage ranges are compatible. Package dimensions differ slightly (0.154" vs 0.173" width), but both are 14-SOIC variants suitable for standard PCB layouts. Propagation delay is longer (100ns vs 40ns), which may require timing verification in speed-critical applications.

Q: What is the difference between CD4070BM96 and MC14070BDR2G?

A: Both parts provide equivalent XOR logic functionality and supply voltage range (3V ~ 18V). Primary differences are manufacturer (Texas Instruments vs onsemi), output drive capability (3.4mA vs 8.8mA), and propagation delay (100ns vs 110ns). MC14070BDR2G offers higher output current, beneficial for driving multiple loads. CD4070BM96 provides faster switching performance. Selection depends on application requirements for drive strength and timing.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification and MSL 1 (unlimited moisture sensitivity) rating, matching the original BU4070BF-E2 environmental and regulatory status.

Q: Which substitute has the fastest propagation delay?

A: HEF4070BT,653 offers the fastest propagation delay at 55ns (@ 15V, 50pF), compared to the original part at 40ns. CD4070BM96 and CD4070BMT specify 100ns, while MC14070BDG and MC14070BDR2G specify 110ns. For timing-critical applications, HEF4070BT,653 provides the closest performance to the original part.

Q: Can I use parts with extended temperature range (-55°C ~ 125°C) in place of the original (-40°C ~ 85°C)?

A: Yes. Extended temperature range parts (CD4070BM, CD4070BM96, CD4070BMT, MC14070BDG, MC14070BDR2G) are backward compatible with applications requiring only -40°C ~ 85°C operation. The broader temperature specification provides additional design margin and environmental flexibility.

Q: What packaging options are available for substitutes?

A: CD4070BM96 is available in Cut Tape (CT) & Digi-Reel packaging. CD4070BMT and MC14070BDR2G are supplied in Tape & Reel (TR) format. MC14070BDG is available in Tube packaging. HEF4070BT,653 is supplied in Tape & Reel. Selection depends on assembly process requirements and volume considerations.