SN75C188DR RS232 4/0 Driver Interface IC Equivalent & Substitute Parts

Part Overview

The SN75C188DR 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 main part is currently in Last Time Buy status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning. Active alternatives with compatible electrical and mechanical specifications are available from Texas Instruments and Analog Devices Inc./Maxim Integrated.

Substiute Parts

SN75C188DR

Texas InstrumentsIn Stock: 57495SN75C188DR Datasheet

Current PartRFQ

SN75188DR

Texas InstrumentsIn Stock: 18209SN75188DR Datasheet

MFR RecommendedRFQ

DS14C88MX/NOPB

National SemiconductorIn Stock: 23754DS14C88MX/NOPB Datasheet

MFR RecommendedRFQ

MAX1488EESD+T

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

DirectRFQ

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

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN75C188DR is determined by the following critical parameters:

Primary Compatibility Criteria:

• Protocol: RS232
• Number of Drivers/Receivers: 4/0
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Voltage - Supply Range: Must encompass or overlap with ±4.5V ~ 15V
• Operating Temperature Range: Must support 0°C ~ 70°C minimum

Substitution Logic: All identified substitute parts maintain identical protocol (RS232), driver/receiver configuration (4/0), and physical package specifications (14-SOIC surface mount). Voltage supply ranges and operating temperature specifications vary among substitutes. Parts with wider or equivalent voltage and temperature ranges provide direct substitution capability. Parts with narrower specifications require application-level verification of operating conditions.

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments SN75188DR is the primary active equivalent from the original manufacturer. This part maintains identical driver/receiver configuration and package specification with Active product status. The voltage supply range (±7.5V ~ 15V) is narrower than the original SN75C188DR (±4.5V ~ 15V) at the lower bound, requiring verification that applications do not require operation below ±7.5V.

National Semiconductor DS14C88MX/NOPB provides an alternative with Active status and compatible 14-SOIC packaging. The voltage supply range (4.5V ~ 12.6V) is narrower than the original specification at the upper bound, requiring confirmation that applications do not exceed 12.6V supply voltage.

Analog Devices Inc./Maxim Integrated MAX1488 Series (MAX1488EESD+T, MAX1488ECSD+, MAX1488ECSD+T, MAX1488EESD+) offers multiple packaging and temperature grade options. All MAX1488 variants maintain 4/0 driver/receiver configuration and 14-SOIC packaging with Active product status. The voltage supply range (4.5V ~ 13.2V) is narrower than the original at the upper bound. The MAX1488EESD+ and MAX1488EESD+T variants support extended operating temperature (-40°C ~ 85°C), exceeding the original specification. All MAX1488 parts specify 120Kbps data rate capability.

All substitute parts are ROHS3 Compliant and REACH Unaffected, matching the original part's compliance status.

Frequently Asked Questions (FAQ)

Q: Can SN75188DR directly replace SN75C188DR? A: SN75188DR is functionally equivalent with identical 4/0 driver/receiver configuration and 14-SOIC package. The voltage supply range differs at the lower bound (±7.5V ~ 15V versus ±4.5V ~ 15V). Direct substitution is valid for applications operating at ±7.5V or higher.

Q: What is the difference between MAX1488ECSD+ and MAX1488EESD+? A: Both parts share identical electrical specifications (4.5V ~ 13.2V supply, 120Kbps data rate, 14-SOIC package). The primary difference is operating temperature range: MAX1488ECSD+ operates 0°C ~ 70°C, while MAX1488EESD+ operates -40°C ~ 85°C. Selection depends on application temperature requirements.

Q: Does packaging designation (Tape & Reel, Tube, Cut Tape) affect electrical compatibility? A: Packaging designation affects procurement and handling only. Electrical and mechanical specifications remain identical regardless of packaging format. SN75188DR available in Cut Tape & Digi-Reel format is electrically equivalent to SN75C188DR supplied in Tape & Reel format.

Q: Are all substitute parts ROHS3 compliant? A: All identified substitute parts (SN75188DR, DS14C88MX/NOPB, MAX1488 series) are ROHS3 Compliant, matching the original SN75C188DR compliance status.

Q: What is the significance of the Last Time Buy status for SN75C188DR? A: Last Time Buy status indicates the manufacturer will discontinue production. Active substitute parts from Texas Instruments (SN75188DR), National Semiconductor (DS14C88MX/NOPB), and Analog Devices Inc./Maxim Integrated (MAX1488 series) provide long-term design continuity and procurement availability.