SN75188N Equivalent & Substitute Parts

Part Overview

The SN75188N is a 4/0 Driver RS232 interface IC manufactured by Texas Instruments in a 14-DIP through-hole package. This component is classified as Last Time Buy, indicating limited availability and the necessity to identify equivalent substitute parts for ongoing design requirements and production planning. RS232 driver ICs are essential interface components for serial communication applications, and equivalent alternatives ensure design continuity when the primary part reaches end-of-life status.

Substiute Parts

SN75188N

Texas InstrumentsIn Stock: 9471SN75188N Datasheet

Current PartRFQ

SN75188DR

Texas InstrumentsIn Stock: 18209SN75188DR Datasheet

MFR RecommendedRFQ

MAX1488ECPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1088MAX1488ECPD+ Datasheet

MFR RecommendedRFQ

MAX1488EEPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 894MAX1488EEPD+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN75188N are identified based on the following critical parameters that determine functional and mechanical compatibility:

Primary Substitution Criteria:

• Protocol: RS232
• Number of Drivers/Receivers: 4/0 configuration
• Package Type: 14-DIP through-hole form factor
• Voltage Supply Range: Compatible with ±7.5V ~ 15V or overlapping range
• Operating Temperature: Minimum 0°C ~ 70°C coverage
• RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on packaging configuration:

Category 1 - Through-Hole Package (Direct Pin-Compatible Substitutes): Parts maintaining the 14-DIP package format with identical pinout and through-hole mounting, suitable for direct board-level replacement without PCB redesign.

Category 2 - Surface Mount Package (Functional Equivalents): Parts with equivalent electrical specifications but different package types, requiring PCB layout modifications.

Parameter Comparison

Engineering Selection Recommendations

SN75188DR (Texas Instruments): This part is the manufacturer-recommended substitute from Texas Instruments, maintaining identical electrical specifications and operating parameters as the SN75188N. The primary difference is the package format: 14-SOIC surface mount versus 14-DIP through-hole. Selection of this part requires PCB redesign to accommodate surface-mount footprint. Product status is Active with higher inventory availability (18,188 pcs), ensuring long-term supply continuity. ROHS3 compliance and EAR99 classification match the original part.

MAX1488ECPD+ (Analog Devices Inc./Maxim Integrated): This part provides functional equivalence with identical 14-DIP through-hole packaging, enabling direct board-level replacement without PCB modification. Voltage supply range (4.5V ~ 13.2V) overlaps with the SN75188N specification and is suitable for applications within the 0°C ~ 70°C operating window. Product status is Active with moderate inventory (1,035 pcs). ROHS3 compliance and EAR99 classification are maintained.

MAX1488EEPD+ (Analog Devices Inc./Maxim Integrated): This part offers identical 14-DIP through-hole packaging with extended operating temperature range (-40°C ~ 85°C), providing enhanced thermal performance beyond the SN75188N specification. Voltage supply range (4.5V ~ 13.2V) is compatible. Product status is Active with available inventory (785 pcs). This option is suitable for applications requiring extended temperature operation. ROHS3 compliance and EAR99 classification are maintained.

Frequently Asked Questions (FAQ)

Q: Can SN75188DR be used as a direct replacement for SN75188N?

A: SN75188DR is electrically equivalent but requires PCB redesign. The SN75188N uses 14-DIP through-hole packaging, while SN75188DR uses 14-SOIC surface-mount packaging. Pinout and electrical function are identical, but board layout modifications are necessary.

Q: What is the key difference between MAX1488ECPD+ and MAX1488EEPD+?

A: Both parts use identical 14-DIP through-hole packaging and are pin-compatible with SN75188N. The primary difference is operating temperature range: MAX1488ECPD+ operates 0°C ~ 70°C, while MAX1488EEPD+ operates -40°C ~ 85°C. Select MAX1488EEPD+ for applications requiring extended temperature performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SN75188DR, MAX1488ECPD+, and MAX1488EEPD+ are all ROHS3 compliant, matching the environmental compliance status of the SN75188N.

Q: Which substitute part offers the best inventory availability?

A: SN75188DR has the highest inventory level at 18,188 pcs. However, if through-hole packaging is required without PCB redesign, MAX1488ECPD+ (1,035 pcs) and MAX1488EEPD+ (785 pcs) are available alternatives.

Q: Can MAX1488ECPD+ and MAX1488EEPD+ be used interchangeably?

A: Yes, within their respective operating temperature ranges. Both parts are pin-compatible with SN75188N and use identical 14-DIP packaging. Selection depends on application temperature requirements.

Q: What is the voltage supply compatibility between SN75188N and its substitutes?

A: SN75188N operates at ±7.5V ~ 15V. MAX1488ECPD+ and MAX1488EEPD+ operate at 4.5V ~ 13.2V. The Maxim parts support a lower minimum voltage but are compatible with the SN75188N supply range within the overlapping 4.5V ~ 13.2V window. Verify application-specific voltage requirements before selection.