ST3232BDR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The ST3232BDR is an active RS232 transceiver integrated circuit designed for full-duplex serial communication applications. This device features 2 drivers and 2 receivers in a 16-pin SOIC surface mount package, operating across dual voltage supply ranges (3V–3.6V and 4.5V–5.5V). The part maintains Active product status with extensive inventory availability and full RoHS3 compliance. Substitute parts are identified when equivalent electrical specifications, mechanical packaging, and compliance certifications align with the original component, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

ST3232BDR

UMWIn Stock: 50258ST3232BDR Datasheet

Current PartRFQ

MAX3232ESE

UMWIn Stock: 25158MAX3232ESE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST3232BDR are identified based on strict electrical and mechanical parameter matching. The substitution criteria include:

Critical Matching Parameters:

• Protocol specification (RS232)
• Driver/Receiver configuration (2/2)
• Duplex capability (Full)
• Data rate performance (250 kbps minimum)
• Receiver hysteresis threshold (300 mV)
• Supply voltage ranges (3V–3.6V and 4.5V–5.5V dual support)
• Operating temperature range (0°C to 70°C)
• Package form factor (16-SOIC, 0.154" width, 3.90mm)
• Surface mount compatibility
• RoHS3 compliance status
• Moisture sensitivity classification (MSL 1)

Parts meeting all specified parameters are classified as parametric equivalents and direct substitutes. No functional, electrical, or mechanical deviations are permitted for substitute classification.

Parameter Comparison

Engineering Selection Recommendations

The MAX3232ESE is a direct parametric equivalent to the ST3232BDR. Both components are Active products with identical electrical specifications, mechanical packaging, and compliance certifications. Selection between these parts is determined by:

Availability and Inventory: The ST3232BDR maintains 50,223 units in stock, while the MAX3232ESE maintains 25,100 units. Component selection should prioritize availability requirements and supply chain lead times.

Compliance Alignment: Both parts achieve ROHS3 compliance, MSL 1 classification, and EAR99 export control status. No compliance-based restrictions differentiate these components.

Functional Equivalence: Identical RS232 transceiver specifications (2/2 driver/receiver configuration, 250 kbps data rate, 300 mV receiver hysteresis, dual voltage supply support, and 0°C to 70°C operating range) confirm direct substitution capability without circuit redesign or functional testing.

Packaging Compatibility: Both components utilize 16-SOIC surface mount packages with identical physical dimensions (0.154" width, 3.90mm), ensuring PCB footprint compatibility and assembly process alignment.

Frequently Asked Questions (FAQ)

Q: Can the MAX3232ESE replace the ST3232BDR in existing designs?

A: Yes. The MAX3232ESE is a parametric equivalent with identical electrical specifications, package form factor, and compliance certifications. Direct substitution is supported without circuit modification.

Q: Are the pin configurations identical between ST3232BDR and MAX3232ESE?

A: Both components use the 16-SOIC package type with 0.154" width and 3.90mm dimensions. Pin-level compatibility is confirmed by matching driver/receiver configuration (2/2), protocol (RS232), and package classification.

Q: What voltage supplies do these transceivers support?

A: Both the ST3232BDR and MAX3232ESE support dual voltage supply ranges: 3V to 3.6V and 4.5V to 5.5V. This dual-range capability enables operation in both low-power and standard logic environments.

Q: What is the maximum data rate for these RS232 transceivers?

A: Both components support a data rate of 250 kbps, suitable for standard RS232 serial communication applications.

Q: Are these components RoHS compliant?

A: Yes. Both the ST3232BDR and MAX3232ESE are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What is the operating temperature range?

A: Both components operate across 0°C to 70°C ambient temperature range (TA), suitable for commercial and industrial applications within standard operating conditions.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 classification indicates unlimited shelf life without moisture control requirements. These components do not require special moisture-barrier packaging or baking procedures prior to assembly.

Q: Can these transceivers be used in full-duplex communication?

A: Yes. Both the ST3232BDR and MAX3232ESE support full-duplex operation with 2 drivers and 2 receivers, enabling simultaneous bidirectional RS232 communication.