CD4018BM Equivalent & Substitute Parts

Part Overview

The CD4018BM is a Counter IC Divide-by-N logic component manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device functions as a 5-bit positive edge-triggered counter with asynchronous reset and synchronous timing, operating across a wide supply voltage range of 3V to 18V. The CD4018BM is classified as Last Time Buy, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure continued design support and procurement availability for new production runs and legacy system maintenance.

Key Parameters

Parameter	Value
Logic Type	Divide-by-N
Number of Elements	1
Number of Bits per Element	5
Reset	Asynchronous
Timing	Synchronous
Count Rate	8.5 MHz
Trigger Type	Positive Edge
Voltage - Supply	3 V ~ 18 V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Series	4000B

Substitute Part Grouping Explanation

Substitute parts for the CD4018BM are qualified based on strict electrical and mechanical parameter matching within the 4000B logic series. The following parameters determine substitution eligibility:

Logic Type: Divide-by-N counter architecture
Bit Configuration: 5-bit single element
Reset Mechanism: Asynchronous reset capability
Timing Architecture: Synchronous operation
Trigger Characteristic: Positive edge detection
Supply Voltage Range: 3V to 18V compatibility
Operating Temperature Range: -55°C to 125°C
Package Configuration: 16-SOIC surface mount form factor
Pin Compatibility: Identical 16-SOIC pinout

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional and physical interchangeability within the specified operating conditions.

Parameter Comparison

Parameter	CD4018BM (Main)	CD4018BM96	MC14018BDG	MC14018BDR2G
Manufacturer	Texas Instruments	Texas Instruments	Motorola	onsemi
Logic Type	Divide-by-N	Divide-by-N	Divide-by-N	Divide-by-N
Number of Bits per Element	5	5	5	5
Reset	Asynchronous	Asynchronous	Asynchronous	Asynchronous
Timing	Synchronous	Synchronous	Synchronous	Synchronous
Count Rate	8.5 MHz	8.5 MHz	8 MHz	8 MHz
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Voltage - Supply	3 V ~ 18 V	3 V ~ 18 V	3 V ~ 18 V	3 V ~ 18 V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)

Engineering Selection Recommendations

CD4018BM96 (Texas Instruments, Active Status): This part is the manufacturer-recommended substitute, maintaining identical electrical specifications and count rate performance. It carries Active product status with ROHS3 compliance and MSL-1 rating, providing the most direct replacement path with full regulatory alignment.

MC14018BDR2G (onsemi, Active Status): This part offers the highest inventory availability (19,458 units) and maintains all critical electrical parameters. It is supplied in Tape & Reel packaging with ROHS3 compliance and MSL-1 rating. The count rate specification of 8 MHz represents a minor reduction from the main part's 8.5 MHz, remaining within acceptable operational margins for divide-by-N counter applications.

MC14018BDG (Motorola, Active Status): This part maintains functional equivalence with identical electrical specifications and 16-SOIC packaging. It is supplied in Bulk packaging with an 8 MHz count rate specification. Compliance certifications are not specified for this variant.

All substitute parts are qualified for identical operating temperature ranges (-55°C to 125°C) and supply voltage specifications (3V to 18V), ensuring direct functional replacement within the specified environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can CD4018BM96 be used as a direct replacement for CD4018BM?

A: Yes. CD4018BM96 maintains identical electrical specifications, including 8.5 MHz count rate, 5-bit divide-by-N architecture, and 16-SOIC packaging. It is the manufacturer-recommended substitute with Active product status.

Q: What is the difference between MC14018BDR2G and MC14018BDG?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is packaging format: MC14018BDR2G is supplied in Tape & Reel configuration, while MC14018BDG is supplied in Bulk. MC14018BDR2G offers higher inventory availability.

Q: Does the 8 MHz count rate of MC14018BDR2G affect compatibility with CD4018BM designs?

A: The MC14018BDR2G count rate specification of 8 MHz is within acceptable operational parameters for divide-by-N counter applications. Both parts operate synchronously with positive edge triggering and maintain identical voltage supply and temperature specifications. Application-specific timing requirements should be evaluated.

Q: Are all substitute parts RoHS compliant?

A: CD4018BM96 and MC14018BDR2G carry explicit ROHS3 compliance certification. MC14018BDG compliance status is not specified in available documentation.

Q: What packaging options are available for these substitute parts?

A: CD4018BM96 is available in Cut Tape (CT) & Digi-Reel® packaging. MC14018BDR2G is supplied in Tape & Reel (TR) format. MC14018BDG is supplied in Bulk packaging. All maintain identical 16-SOIC form factor.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. All substitute parts share identical 16-SOIC pinout and surface mount configuration, enabling direct PCB assembly interchangeability without layout modifications.

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