CD4070BCM XOR Logic IC 4-Channel 2-Input Equivalent & Substitute Parts

Part Overview

The CD4070BCM is a 4-channel 2-input XOR (Exclusive OR) logic integrated circuit manufactured by onsemi in the 4000B series. This part operates across a supply voltage range of 3V to 15V and is housed in a 14-SOIC surface mount package. The CD4070BCM is currently listed as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

CD4070BCM

onsemiIn Stock: 805CD4070BCM Datasheet

Current PartRFQ

MC14070BDG

onsemiIn Stock: 3621MC14070BDG Datasheet

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MC14070BDR2G

onsemiIn Stock: 65284MC14070BDR2G Datasheet

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CD4070BM

Texas InstrumentsIn Stock: 1382CD4070BM Datasheet

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CD4070BM96

Texas InstrumentsIn Stock: 37912CD4070BM96 Datasheet

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CD4070BMT

Texas InstrumentsIn Stock: 1250CD4070BMT Datasheet

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CD4070BNSR

Texas InstrumentsIn Stock: 1932CD4070BNSR Datasheet

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HEF4070BT,653

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4070BCM is determined by the following critical parameters:

• Logic Function: All substitute parts must implement 4-channel 2-input XOR logic
• Circuit Count & Input Configuration: 4 circuits with 2 inputs per circuit
• Package Type: 14-SOIC surface mount package with compatible pin pitch (0.154", 3.90mm width)
• Supply Voltage Range: Minimum 3V to 15V compatibility
• Quiescent Current: Maximum 1 µA
• Output Drive Current: 3.4mA minimum for both high and low states
• Input Logic Levels: 1.5V ~ 4V (low), 4.6V ~ 11V (high)
• Operating Temperature Range: -55°C ~ 125°C minimum
• Propagation Delay: 75ns maximum at 15V, 50pF load

Substitute parts are grouped into two categories based on electrical performance:

Category A (Direct Substitutes - Matched Output Drive): MC14070BDG, MC14070BDR2G, CD4070BM, CD4070BM96, CD4070BMT

• Output drive current: 3.4mA (CD4070 variants) or 8.8mA (MC14070 variants)
• Supply voltage: 3V ~ 18V (extended range)
• Propagation delay: 100ns ~ 110ns at 15V, 50pF

Category B (Alternative Substitute - Different Operating Range): CD4070BNSR, HEF4070BT,653

• CD4070BNSR: 14-SO package (0.209", 5.30mm width) - different package footprint
• HEF4070BT,653: Supply voltage 3V ~ 15V, operating temperature -40°C ~ 85°C (narrower range), faster propagation delay (55ns)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs)

MC14070BDR2G and MC14070BDG are the preferred substitutes. Both are manufactured by onsemi, maintain the same 4000B series lineage as the CD4070BCM, and are currently in active production status. MC14070BDR2G offers the highest inventory availability (65,200 pcs) in Tape & Reel packaging, suitable for automated assembly. MC14070BDG provides equivalent functionality in Tube packaging. Both parts extend the supply voltage range to 3V ~ 18V and deliver higher output drive current (8.8mA vs. 3.4mA), providing improved noise margin and fanout capability. ROHS3 compliance is confirmed for both parts.

Secondary Substitutes (Texas Instruments CD4070 Variants)

CD4070BM96 is actively produced by Texas Instruments with substantial inventory (37,900 pcs) and is available in Cut Tape & Digi-Reel packaging. CD4070BM is discontinued at DiGi Electronics but remains available through inventory channels (1,320 pcs). CD4070BMT is obsolete but maintains 1,142 pcs in stock. All three Texas Instruments variants maintain the original 3.4mA output drive specification and are ROHS3 compliant. Propagation delay is 100ns at 15V, 50pF, slightly slower than the original CD4070BCM (75ns).

Alternative Substitute (Nexperia)

HEF4070BT,653 from Nexperia USA Inc. is actively produced with 2,000 pcs in inventory. This part offers the fastest propagation delay (55ns at 15V, 50pF) but operates within a narrower temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C) and has higher quiescent current (4 µA vs. 1 µA). Selection of this part requires confirmation that the narrower operating temperature range and higher quiescent current are acceptable for the application.

Package Consideration

CD4070BNSR uses a 14-SO package with 0.209" width, which differs from the standard 14-SOIC (0.154" width) footprint. This part is not recommended as a direct PCB replacement without layout modification, despite being actively produced by Texas Instruments.

Frequently Asked Questions (FAQ)

Q: Can MC14070BDR2G directly replace CD4070BCM on existing PCBs?

A: Yes. Both parts use the 14-SOIC package with identical 0.154" (3.90mm) width and pin pitch. Pin-for-pin compatibility is confirmed. The higher output drive current (8.8mA vs. 3.4mA) and extended supply voltage range (3V ~ 18V vs. 3V ~ 15V) make MC14070BDR2G functionally superior for most applications.

Q: What is the difference between MC14070BDG and MC14070BDR2G?

A: Both parts are electrically identical. The difference is packaging: MC14070BDG is supplied in Tube packaging, while MC14070BDR2G is supplied in Tape & Reel (TR) format. Tape & Reel is standard for automated pick-and-place assembly. Tube packaging is suitable for manual assembly or lower-volume applications.

Q: Why is the propagation delay different between CD4070BCM (75ns) and substitute parts (100ns ~ 110ns)?

A: Propagation delay variation is within normal manufacturing tolerance across different manufacturers and process nodes. The CD4070BCM specification of 75ns represents the original onsemi characterization. Texas Instruments CD4070 variants specify 100ns, and onsemi MC14070 variants specify 110ns. All values are measured at 15V supply with 50pF load. For timing-critical applications, confirm that the substitute part's propagation delay meets system requirements.

Q: Is HEF4070BT,653 suitable for industrial temperature applications?

A: No. HEF4070BT,653 operates from -40°C to 85°C, which does not cover the full industrial temperature range (-55°C to 125°C) of the CD4070BCM. Use this part only if your application operates within the -40°C to 85°C range. For full industrial temperature coverage, select MC14070BDR2G, MC14070BDG, or CD4070BM96.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. MC14070BDR2G, MC14070BDG, CD4070BM, CD4070BM96, CD4070BMT, CD4070BNSR, and HEF4070BT,653 are all confirmed ROHS3 compliant. The original CD4070BCM does not specify RoHS status.

Q: What is the difference between CD4070BM96 and CD4070BMT?

A: Both are Texas Instruments parts with identical electrical specifications. CD4070BM96 is actively produced and available in Cut Tape & Digi-Reel packaging (37,900 pcs inventory). CD4070BMT is obsolete but available through inventory (1,142 pcs) in Cut Tape & Digi-Reel packaging. CD4070BM96 is the preferred choice for new procurement.

Q: Can I use CD4070BNSR as a direct replacement?

A: CD4070BNSR uses a 14-SO package with 0.209" width, compared to the standard 14-SOIC (0.154" width) of CD4070BCM. While electrically compatible, the different package footprint requires PCB layout modification. This part is not recommended for direct PCB replacement without design changes.

Q: What is the quiescent current difference, and does it matter?

A: CD4070BCM and most substitutes specify 1 µA maximum quiescent current. HEF4070BT,653 specifies 4 µA. For battery-powered or ultra-low-power applications, this 3 µA difference may be significant. For standard applications, the difference is negligible.

Q: Which substitute offers the best availability?

A: MC14070BDR2G has the highest inventory (65,200 pcs) and is actively produced by onsemi. This part is recommended for applications requiring immediate availability and long-term supply assurance.