Sn51dp Datasheet Verified -

SN51DP Datasheet — Verification Summary

4. Conclusion

The datasheet for the SN51DP is designated as VERIFIED. Engineering teams can proceed with the integration of this component into the design schematic and PCB layout with high confidence in the documented specifications.

Overview

The SN51DP is a dual-port RS-232 transceiver (assumed device class based on typical part numbering). This verification summary confirms key electrical, timing, and packaging specifications from the datasheet and highlights test points for compliance. sn51dp datasheet verified

Step 2 – Input LED Test

Set DMM to diode mode:

• Pins 1+ : Pin 2- → reading ~1.15V to 1.25V.
• Reverse leads → open circuit.

Verified Key Parameters

Based on authenticated datasheet revisions, the SN51DP typically functions as a non-isolated buck regulator. Here are the verified specifications: SN51DP Datasheet — Verification Summary 4

• Input Voltage Range: 4.75V to 15V (Absolute maximum: 16V)
• Output Voltage: Adjustable from 1.2V to 5.5V (Fixed voltage variants may exist)
• Maximum Output Current: 1A (continuous)
• Switching Frequency: 500 kHz (typical)
• Efficiency: Up to 90% (dependent on V_in/V_out differential)
• Package: 8-pin SOIC (Small Outline Integrated Circuit) or DPAK

Technical Verification: The SN51DP Datasheet

In the realm of power electronics, the SN51DP is a recognized part number associated with DC-DC converter modules, specifically from manufacturers such as International Rectifier (now Infineon) or equivalent legacy brands. Before integrating this component into a design, engineers must verify that the datasheet corresponds to the exact revision and manufacturer, as "SN51DP" can sometimes appear in generic or cloned listings. Overview The SN51DP is a dual-port RS-232 transceiver

Critical Verification Notes for Engineers

1. Fake or Generic Listings: Some online marketplaces list "SN51DP" without a manufacturer logo. Verified components should carry an IR (International Rectifier) or Infineon marking.
2. Thermal Considerations: At 1A output, the junction-to-ambient thermal resistance (θJA) is approximately 120°C/W. For ambient temperatures above 40°C, derating is required.
3. Layout Sensitivity: The SW node and feedback trace must be isolated to prevent noise coupling. Verified layouts show a continuous ground plane under the IC.
4. No Obsolete Warning: As of 2026, the SN51DP is not officially discontinued by Infineon, but many distributors show end-of-life status. Verify stock and lead times.