STMicroelectronics VN340SP-33-E

Overview

VN340SP-33-E from STMicroelectronics is a quad-channel high-side smart power switch fabricated in VIPower M0-3 technology, designed to drive resistive or inductive loads (e.g., solenoids, relays, lamps) with one side grounded. It delivers 1 A continuous output current per channel, features 32 V input clamp voltage, integrated current limiting (I_LIM = 2 A), thermal shutdown (T_TSD = 150–170 °C), and open-drain diagnostic output for fault reporting. Used in industrial I/O modules requiring robust load control and diagnostics.

For engineers reviewing the VN340SP-33-E datasheet, VN340SP-33-E pinout, VN340SP-33-E application, or VN340SP-33-E equivalent, this page provides verified electrical parameters, PowerSO-10 package mapping, real-world switching behavior (t_d(ON) = 52–100 µs), protection thresholds (V_USD = 5–8 V), and diagnostic logic truth table - all critical for PLC output stage design and failure-mode analysis.

Technical Context

The VN340SP-33-E integrates four independent high-side power switches with dedicated input logic, on-chip current sensing, and thermal monitoring. Each channel implements active current limiting during short-circuit events and fast demagnetization (V_demag = V_CC−45 to V_CC−65 V) for inductive loads. The DIAG pin operates as an open-drain status indicator tied to junction temperature and undervoltage conditions.

Input logic complies with IEC 61131-2 Type 1/3 characteristics: V_IL ≤ 2 V, V_IH ≥ 3.5 V, and 0.5 V hysteresis ensures noise immunity. Internal clamping at ≥32 V allows direct connection to 24 V industrial buses without external Zener diodes, while R_DS(on) = 0.2 Ω @ 25 °C enables low conduction loss at full 1 A load.

Key Specifications

Pinout & Package

Delivered in PowerSO-10 package: thermally enhanced surface-mount housing with exposed die pad for efficient heat transfer to PCB copper. Pin 1 (GND) and pins 9–10 (VCC) share common ground and supply planes; pin 5 (DIAG) serves as shared fault-reporting node.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side switch applications.

Compared with VN340SP-33-E, IPS2050H offers higher current per channel but increases PCB area and component count for quad implementation, while TPS27082L reduces integration by removing diagnostic visibility and industrial input hardening - making VN340SP-33-E optimal for space-constrained, safety-aware industrial I/O.

Availability

VN340SP-33-E is available at Aetrix Electronics and suitable for industrial PLC output modules, vending machine actuator control, and numerical control machine I/O requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for VN340SP-33-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities and ISO/TS 16949-certified processes.

VN340SP-33-E belongs to ST's VIPower high-side switch product line, engineered specifically for industrial automation applications demanding robust load control, integrated diagnostics, and IEC 61131-2 compliance in harsh electromagnetic environments.

FAQ

What is the maximum continuous output current per channel for VN340SP-33-E?

The VN340SP-33-E delivers 1 A continuous output current per channel at T_C = 25 °C, with internal current limiting set to 2 A DC (I_LIM). This rating assumes proper PCB thermal design using the PowerSO-10 exposed pad and minimum recommended copper area per ST's DS4346 Rev 5 thermal data (R_th(JC) = 3 °C/W).

How does the DIAG pin indicate fault conditions?

The DIAG pin is an open-drain output that pulls low (<1 V at 5 mA) during overtemperature, undervoltage (V_CC < 5 V), or short-circuit events. Its assertion occurs within 100 µs of fault onset, and it remains low until the condition clears and the junction cools below T_R = 135–155 °C or V_CC rises above 8 V.

Can VN340SP-33-E drive inductive loads without external flyback diodes?

Yes - the device integrates fast demagnetization circuitry that clamps output voltage to V_CC−45 V to V_CC−65 V during turn-off, safely dissipating stored inductive energy. This eliminates the need for external freewheeling diodes in most 24 V solenoid and relay applications, as confirmed in DS4346 Figure 9 and Table 6.

What is the input voltage range compatible with IEC 61131-2 Type 1/3 specifications?

VN340SP-33-E meets IEC 61131-2 Type 1/3 requirements with V_IL ≤ 2 V (low), V_IH ≥ 3.5 V (high), and 0.5 V input hysteresis. Its internal 32 V clamp allows direct connection to 24 V industrial buses, and input current remains ≤25 µA across 10–36 V supply range - satisfying noise immunity and leakage constraints of the standard.