SN75C198D Equivalent & Substitute Parts

Part Overview

The SN75C198D is a 4/0 Driver RS232 interface IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component functions as an RS232 line driver for serial communication applications. The SN75C198D is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently using this component.

Substiute Parts

SN75C198D

Texas InstrumentsIn Stock: 2462SN75C198D Datasheet

Current PartRFQ

SN75188DR

Texas InstrumentsIn Stock: 18209SN75188DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75C198D is based on the following critical parameters that must remain consistent:

• Protocol Compatibility: RS232 interface standard
• Driver/Receiver Configuration: 4/0 (4 drivers, 0 receivers)
• Package Type: 14-SOIC surface mount package with 0.154" (3.90mm) width
• Supply Voltage Range: Must accommodate the original 4.5V ~ 15V specification
• Operating Temperature Range: 0°C ~ 70°C
• Compliance Standards: ROHS3 compliance and MSL Level 1

The SN75188DR meets these substitution criteria as an active product from Texas Instruments with identical functional configuration and package specifications.

Parameter Comparison

Engineering Selection Recommendations

The SN75188DR is the primary substitute for the SN75C198D based on functional equivalence and active product status. Both components share identical RS232 driver configuration (4/0), package specifications (14-SOIC), and compliance certifications (ROHS3, MSL Level 1). The SN75188DR is currently in active production status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the SN75C198D.

The supply voltage specification for the SN75188DR (±7.5V ~ 15V) encompasses the original part's range (4.5V ~ 15V), providing compatibility with existing circuit designs. Both components maintain identical operating temperature ranges and mounting characteristics, enabling direct substitution in surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the SN75188DR directly replace the SN75C198D in existing designs?

A: Yes. Both components are 4/0 RS232 drivers in 14-SOIC packages with identical pin configurations, operating temperature ranges, and compliance standards. The SN75188DR's supply voltage range encompasses the original specification.

Q: What is the difference in supply voltage specifications between these parts?

A: The SN75C198D operates from 4.5V ~ 15V, while the SN75188DR operates from ±7.5V ~ 15V. The SN75188DR's specification includes bipolar voltage capability, which is compatible with designs using the original part's unipolar range.

Q: Are there any package or mounting differences?

A: No. Both components use identical 14-SOIC surface mount packages with 0.154" (3.90mm) width. No PCB layout modifications are required for substitution.

Q: Why is the SN75C198D being discontinued?

A: The SN75C198D is classified as Last Time Buy, indicating Texas Instruments has transitioned this product to end-of-life status. The SN75188DR represents the active equivalent in the product line.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN75C198D and SN75188DR are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current environmental and regulatory requirements.