MCP48CMB18-20E/ST Equivalent & Substitute Parts

Part Overview

The MCP48CMB18-20E/ST is a 10-bit Digital to Analog Converter (DAC) manufactured by Microchip Technology, designed for data acquisition applications requiring voltage output conversion. This device integrates 8 independent D/A converters in a 20-TSSOP surface mount package and operates across a wide supply voltage range of 1.8V to 5.5V for both analog and digital domains. The part is currently in active production status with ROHS3 compliance and REACH unaffected classification. Substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Specification
Number of Bits	10
Number of D/A Converters	8
Settling Time (Typical)	16µs
Output Type	Voltage - Buffered
Data Interface	SPI
Reference Type	External, Internal, Supply
Voltage - Supply, Analog	1.8V ~ 5.5V
Voltage - Supply, Digital	1.8V ~ 5.5V
INL/DNL (LSB)	±0.25, ±0.25
Architecture	R-2R
Operating Temperature Range	-40°C ~ 125°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the MCP48CMB18-20E/ST are identified through parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

Resolution and Converter Count: 10-bit resolution with 8 independent D/A converters
Output Characteristics: Voltage-buffered output with SPI data interface
Supply Voltage Compatibility: Dual supply range of 1.8V to 5.5V for both analog and digital domains
Accuracy Specifications: INL/DNL performance of ±0.25 LSB
Settling Time: 16µs typical settling time
Package and Mounting: 20-TSSOP surface mount package with identical physical dimensions
Compliance and Environmental: ROHS3 compliance, REACH unaffected status, and MSL 3 rating

The MCP48CVB18-20E/ST meets all these criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Parameter	MCP48CMB18-20E/ST	MCP48CVB18-20E/ST	Match Status
Manufacturer	Microchip Technology	Microchip Technology	Identical
Number of Bits	10	10	Identical
Number of D/A Converters	8	8	Identical
Settling Time (Typical)	16µs	16µs	Identical
Output Type	Voltage - Buffered	Voltage - Buffered	Identical
Data Interface	SPI	SPI	Identical
Reference Type	External, Internal, Supply	External, Internal, Supply	Identical
Voltage - Supply, Analog	1.8V ~ 5.5V	1.8V ~ 5.5V	Identical
Voltage - Supply, Digital	1.8V ~ 5.5V	1.8V ~ 5.5V	Identical
INL/DNL (LSB)	±0.25, ±0.25	±0.25, ±0.25	Identical
Architecture	R-2R	R-2R	Identical
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 125°C	Identical
Package / Case	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

Both the MCP48CMB18-20E/ST and MCP48CVB18-20E/ST are active production devices from Microchip Technology with full ROHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and supply chain considerations rather than functional or electrical differences. Both devices meet identical specifications for resolution, settling time, supply voltage ranges, accuracy performance, and package requirements. The MCP48CVB18-20E/ST currently maintains higher inventory availability (1193 pieces) compared to the MCP48CMB18-20E/ST (1113 pieces), making it a viable alternative for immediate procurement needs. PCB layout, firmware, and system integration remain unchanged when substituting between these parts, as all electrical and mechanical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the MCP48CVB18-20E/ST be used as a direct replacement for the MCP48CMB18-20E/ST?

A: Yes. The MCP48CVB18-20E/ST is a parametric equivalent substitute with identical electrical specifications, package dimensions, pin configuration, and performance characteristics. No circuit modifications or firmware changes are required.

Q: Are there any differences in the 20-TSSOP package between these parts?

A: No. Both parts use the identical 20-TSSOP package with 0.173" width and 4.40mm physical dimensions. PCB footprints and assembly processes are interchangeable.

Q: Do both parts support the same supply voltage ranges?

A: Yes. Both the MCP48CMB18-20E/ST and MCP48CVB18-20E/ST operate with analog and digital supply voltages ranging from 1.8V to 5.5V, providing identical flexibility for system design.

Q: What is the significance of the different part number suffixes (CMB vs. CVB)?

A: The suffix designates internal temperature grade or manufacturing process variant within the MCP48 family. Both variants meet the identical -40°C to 125°C operating temperature specification and all other electrical parameters.

Q: Are the settling time and accuracy specifications identical?

A: Yes. Both parts feature 16µs typical settling time, 10-bit resolution, 8 independent D/A converters, and ±0.25 LSB INL/DNL performance specifications.

Q: Do both parts require the same reference voltage configuration?

A: Yes. Both devices support external, internal, and supply-based reference types with identical functional operation.

Q: Are there any compliance or environmental differences between these substitutes?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 3 (168 Hours) moisture sensitivity ratings.

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