SN75188D RS232 Driver IC Equivalent & Substitute Parts

Part Overview

The SN75188D is a 4/0 RS232 driver interface IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating limited availability of the original part number. The SN75188D serves as a critical interface driver for RS232 serial communication applications requiring 4 drivers and 0 receivers configuration. Substitute parts are necessary due to inventory constraints and product lifecycle status, with alternative part numbers offering equivalent or enhanced electrical and mechanical specifications.

Substiute Parts

SN75188D

Texas InstrumentsIn Stock: 2186SN75188D Datasheet

Current PartRFQ

SN75188DR

Texas InstrumentsIn Stock: 18209SN75188DR Datasheet

MFR RecommendedRFQ

MAX1488ECSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 2251MAX1488ECSD+ Datasheet

MFR RecommendedRFQ

MAX1488ECSD+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3941MAX1488ECSD+T Datasheet

MFR RecommendedRFQ

MAX1488EESD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3411MAX1488EESD+ Datasheet

MFR RecommendedRFQ

MAX1488EESD+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1194MAX1488EESD+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN75188D is determined by the following critical parameters:

Primary Compatibility Criteria:

• RS232 protocol implementation
• 4/0 driver/receiver configuration
• 14-SOIC surface mount package (0.154", 3.90mm Width)
• ROHS3 compliance
• MSL 1 rating

Acceptable Parameter Variations:

• Voltage supply range: Substitute parts may operate within different but overlapping supply voltage windows, provided the operating range encompasses the application requirements
• Operating temperature range: Extended temperature grades (industrial or military) are acceptable substitutes for commercial grades
• Data rate specifications: Substitute parts with specified data rates (120Kbps) are compatible with applications not requiring higher speeds
• Packaging format: Cut Tape, Tape & Reel, and Tube packaging formats are mechanically and electrically interchangeable for the same IC

All substitute parts listed maintain identical electrical function, pinout compatibility, and mechanical fit within the 14-SOIC package footprint.

Parameter Comparison

Engineering Selection Recommendations

SN75188DR (Texas Instruments): Direct manufacturer equivalent with identical electrical specifications and operating parameters. Active product status ensures long-term availability. Recommended as primary substitute when maintaining single-source supplier strategy. Available in Cut Tape and Digi-Reel packaging formats.

MAX1488ECSD+ and MAX1488ECSD+T (Analog Devices Inc./Maxim Integrated): Functionally equivalent RS232 driver with 4/0 configuration and 14-SOIC package. Operates within 4.5V ~ 13.2V supply range, which overlaps with SN75188D requirements. Commercial temperature grade (0°C ~ 70°C). Active product status. Available in Tube and Tape & Reel formats.

MAX1488EESD+ and MAX1488EESD+T (Analog Devices Inc./Maxim Integrated): Extended temperature grade variant (-40°C ~ 85°C) suitable for applications requiring industrial temperature performance. Identical electrical function and package compatibility. Active product status. Available in Tube and Tape & Reel formats. Recommended for designs requiring enhanced thermal operating range.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN75188DR be used as a direct replacement for SN75188D? A: Yes. SN75188DR is the active production equivalent from Texas Instruments with identical electrical specifications, pinout, and 14-SOIC package. It is the recommended substitute for maintaining supplier continuity.

Q: Are MAX1488 series parts compatible with SN75188D applications? A: Yes, provided the application supply voltage operates within the 4.5V ~ 13.2V range. Both SN75188D and MAX1488 series implement RS232 protocol with 4/0 driver/receiver configuration in identical 14-SOIC packages. Electrical function and pinout are equivalent.

Q: What is the difference between MAX1488ECSD+ and MAX1488EESD+? A: The primary difference is operating temperature range. MAX1488ECSD+ operates 0°C ~ 70°C (commercial grade), while MAX1488EESD+ operates -40°C ~ 85°C (industrial grade). Both share identical electrical specifications and 14-SOIC packaging. Select based on application temperature requirements.

Q: Does packaging format (Tube, Cut Tape, Tape & Reel) affect electrical performance? A: No. Packaging format affects only handling, storage, and assembly processes. Electrical specifications and performance are identical across all packaging options for the same part number.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts (SN75188DR, MAX1488ECSD+, MAX1488ECSD+T, MAX1488EESD+, MAX1488EESD+T) are ROHS3 compliant with MSL 1 rating, meeting standard environmental and reliability requirements.

Q: Which substitute should be selected for new designs? A: For new designs, SN75188DR or MAX1488EESD+ series are recommended. SN75188DR maintains Texas Instruments sourcing; MAX1488EESD+ provides extended industrial temperature range. Both are active products with long-term availability.