CD4518BPWG4 Equivalent & Substitute Parts

Part Overview

The CD4518BPWG4 is a BCD counter logic integrated circuit manufactured by Texas Instruments, part of the 4000B series. This device functions as a dual 4-bit BCD counter with asynchronous reset and synchronous timing, capable of counting at rates up to 8 MHz across a wide supply voltage range of 3 V to 18 V. The CD4518BPWG4 is currently in Last Time Buy status, indicating limited availability and the necessity to identify equivalent substitute parts for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD4518BPWG4
Manufacturer	Texas Instruments
Logic Type	BCD Counter
Number of Elements	2
Number of Bits per Element	4
Count Rate	8 MHz
Voltage - Supply	3 V ~ 18 V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution of the CD4518BPWG4 is determined by strict equivalence across the following critical parameters:

Logic Function: BCD Counter with 2 elements, 4 bits per element
Electrical Performance: Count rate of 8 MHz, supply voltage range 3 V to 18 V, operating temperature -55°C to 125°C
Package Compatibility: 16-TSSOP surface mount package with identical physical dimensions
Reset and Timing: Asynchronous reset with synchronous timing
Trigger Type: Positive and negative trigger capability
Compliance: ROHS3 compliant, REACH unaffected status

All identified substitute parts maintain identical electrical and mechanical specifications. Differences exist only in packaging format (Tube versus Tape & Reel) and product lifecycle status, which do not affect functional interchangeability in circuit applications.

Parameter Comparison

Parameter	CD4518BPWG4	CD4518BPWR	CD4518BPW	CD4518BPWE4
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	BCD Counter	BCD Counter	BCD Counter	BCD Counter
Number of Elements	2	2	2	2
Number of Bits per Element	4	4	4	4
Count Rate	8 MHz	8 MHz	8 MHz	8 MHz
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-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Reset	Asynchronous	Asynchronous	Asynchronous	Asynchronous
Timing	Synchronous	Synchronous	Synchronous	Synchronous
Trigger Type	Positive, Negative	Positive, Negative	Positive, Negative	Positive, Negative
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tube	Tape & Reel (TR)	Tube	Tube
Product Status	Last Time Buy	Active	Last Time Buy	Last Time Buy

Engineering Selection Recommendations

CD4518BPWR is the manufacturer-recommended substitute, designated as the active product in the CD4518 family. This part maintains full electrical and functional equivalence to the CD4518BPWG4 while offering Active product status, ensuring long-term availability and supply chain continuity. The CD4518BPWR is supplied in Tape & Reel format, suitable for high-volume automated assembly operations.

CD4518BPW and CD4518BPWE4 are parametric equivalents with identical electrical specifications and Last Time Buy status. Both are supplied in Tube packaging. These parts are functionally interchangeable with the CD4518BPWG4 for applications requiring lower-volume procurement or manual assembly processes.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can CD4518BPWR be used as a direct replacement for CD4518BPWG4?

A: Yes. The CD4518BPWR is electrically and functionally identical to the CD4518BPWG4. The only difference is packaging format: CD4518BPWR is supplied in Tape & Reel format while CD4518BPWG4 is supplied in Tube format. Both are 16-TSSOP surface mount packages with identical pinout and performance characteristics.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging contains individual components in a plastic tube, suitable for manual handling and lower-volume applications. Tape & Reel packaging presents components on a continuous carrier tape wound on a reel, optimized for automated pick-and-place assembly equipment. Electrical and functional performance is identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. CD4518BPWR, CD4518BPW, and CD4518BPWE4 are all ROHS3 compliant and REACH unaffected, matching the compliance status of the CD4518BPWG4.

Q: Why is CD4518BPWG4 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number variant. Equivalent alternatives remain available, with CD4518BPWR designated as the active successor product.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All substitute parts share identical electrical specifications, pin configurations, and performance parameters. No circuit modifications are required for substitution.

Q: What is the inventory status of substitute parts?

A: CD4518BPWR has the highest inventory availability at 16,564 pieces. CD4518BPW and CD4518BPWE4 have lower inventory levels at 2,709 and 740 pieces respectively.

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