HEF4071BT,652 Equivalent & Substitute Parts

Part Overview

The HEF4071BT,652 is a 4-channel 2-input OR gate logic IC manufactured by Nexperia USA Inc., housed in a 14-SO surface mount package. This component belongs to the 4000B logic series and is classified as obsolete. The part operates across a supply voltage range of 3V to 15V with a maximum quiescent current of 4 µA and a propagation delay of 35ns at 15V with 50pF load. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	3V ~ 15V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	3.4mA, 3.4mA
Input Logic Level - Low	1.5V ~ 4V
Input Logic Level - High	4.6V ~ 11V
Max Propagation Delay @ V, Max CL	35ns @ 15V, 50pF
Operating Temperature	-40°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the HEF4071BT,652 is determined by strict equivalence across the following critical parameters:

Logic function: 4-channel 2-input OR gate
Package type: 14-SOIC surface mount
Supply voltage compatibility: Minimum 3V to 15V operation
Input/output logic levels: Low 1.5V ~ 4V, High 4.6V ~ 11V
Operating temperature range: -40°C to 125°C minimum
RoHS3 compliance and REACH unaffected status

All substitute parts listed maintain identical logic functionality, pin configuration, and electrical characteristics within the specified operating parameters. Differences in quiescent current, output drive capability, and propagation delay are noted but do not prevent functional substitution when the application requirements are met.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Current - Output High, Low	Max Propagation Delay @ 15V, 50pF	Operating Temperature	Package / Case	Packaging Type
HEF4071BT,652	Nexperia USA Inc.	Obsolete	3V ~ 15V	4 µA	3.4mA, 3.4mA	35ns	-40°C ~ 125°C	14-SOIC (0.154", 3.90mm)	-
MC14071BDR2G	onsemi	Active	3V ~ 18V	1 µA	8.8mA, 8.8mA	100ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)
CD4071BM	Texas Instruments	Discontinued at DiGi Electronics	3V ~ 18V	1 µA	3.4mA, 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tube
CD4071BM96	Texas Instruments	Active	3V ~ 18V	1 µA	3.4mA, 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Cut Tape (CT) & Digi-Reel®
CD4071BNSR	Texas Instruments	Active	3V ~ 18V	1 µA	3.4mA, 3.4mA	90ns	-55°C ~ 125°C	14-SOIC (0.209", 5.30mm)	Tape & Reel (TR)
MC14071BDG	onsemi	Active	3V ~ 18V	1 µA	8.8mA, 8.8mA	100ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tube
NLV14071BDR2G	onsemi	Active	3V ~ 18V	1 µA	8.8mA, 8.8mA	100ns	-55°C ~ 125°C	14-SOIC (0.154", 3.90mm)	Tape & Reel (TR)

Engineering Selection Recommendations

For applications currently using the HEF4071BT,652, the following active alternatives are available:

Primary Substitutes (Identical 14-SOIC 0.154" package):

MC14071BDR2G (onsemi, Active, Tape & Reel)
MC14071BDG (onsemi, Active, Tube)
NLV14071BDR2G (onsemi, Active, Tape & Reel)
CD4071BM96 (Texas Instruments, Active, Cut Tape & Digi-Reel)

Secondary Substitute (Different 14-SOIC 0.209" package):

CD4071BNSR (Texas Instruments, Active, Tape & Reel) — Note: Wider package footprint

All active substitutes maintain ROHS3 compliance and REACH unaffected status. The onsemi variants (MC14071BDR2G, MC14071BDG, NLV14071BDR2G) provide improved quiescent current performance (1 µA vs. 4 µA) and higher output drive capability (8.8mA vs. 3.4mA). Texas Instruments variants (CD4071BM96, CD4071BNSR) maintain output drive matching the original specification (3.4mA). All substitutes support extended operating temperature range (-55°C to 125°C) compared to the original part (-40°C to 125°C).

Frequently Asked Questions (FAQ)

Q: Can MC14071BDR2G directly replace HEF4071BT,652 in existing designs? A: Yes. Both parts are 4-channel 2-input OR gates in 14-SOIC packages with identical pin configuration and logic levels. The MC14071BDR2G operates across a wider supply voltage range (3V ~ 18V vs. 3V ~ 15V) and offers lower quiescent current and higher output drive capability, making it functionally compatible.

Q: What is the difference between CD4071BM96 and CD4071BMT? A: Both are Texas Instruments CD4071 variants with identical electrical specifications. CD4071BM96 is supplied in Cut Tape & Digi-Reel packaging, while CD4071BMT is supplied in Tape & Reel packaging. Selection depends on procurement and assembly requirements.

Q: Why does CD4071BNSR have a different package width (0.209" vs. 0.154")? A: CD4071BNSR uses a wider 14-SO package (0.209" width) compared to the standard 14-SOIC (0.154" width). This part is functionally equivalent but requires PCB layout verification before substitution to ensure physical fit.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the original HEF4071BT,652.

Q: What is the significance of the propagation delay differences (35ns vs. 90ns vs. 100ns)? A: The original HEF4071BT,652 specifies 35ns propagation delay at 15V with 50pF load. Substitute parts range from 90ns to 100ns. For timing-critical applications, verify that the application's timing budget accommodates the longer delays of substitute parts.

Q: Which substitute offers the best quiescent current performance? A: All active substitutes (onsemi and Texas Instruments variants) offer 1 µA quiescent current, which is lower than the original part's 4 µA specification, resulting in improved power efficiency.

Q: Can I use onsemi parts and Texas Instruments parts interchangeably? A: Yes, within the same package type. Both manufacturers' 14-SOIC (0.154" width) variants are pin-compatible and functionally equivalent. Selection can be based on packaging preference, availability, and output drive requirements.

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