STMicroelectronics VN808CMTR-32-E

Overview

VN808CMTR-32-E from STMicroelectronics is an octal high-side power switch IC built on VIPower M0-3 technology, designed to drive grounded loads in industrial control systems. It delivers 1 A per channel with 160 mΩ R_DS(on), operates from 10.5–45 V supply, and integrates junction/case thermal shutdown, current limitation, and loss-of-ground detection. It is used in PLC output modules compliant with IEC 61131.

For engineers reviewing the VN808CMTR-32-E datasheet, VN808CMTR-32-E pinout, VN808CMTR-32-E application, or VN808CMTR-32-E equivalent, key selection criteria include per-channel current rating (1 A), thermal protection thresholds (TJSD = 150–200 °C, TCSD = 125–135 °C), status pin fault reporting, and PowerSO-36 package thermal resistance (R_th(JC) = 1.3 °C/W).

Technical Context

This device implements eight independent high-side switches with CMOS-compatible 3.3 V logic inputs and a shared open-source STATUS pin that asserts high during junction or case overtemperature. Each channel features active current limiting (0.7–1.7 A) and automatic restart under overload, maintaining junction temperature between TJR (135 °C) and TJSD.

Thermal protection operates hierarchically: junction shutdown activates first (TJSD > TCSD); if case temperature exceeds TCSD (125–135 °C), affected channels latch off until TCR (110 °C) is reached. The exposed VCC-connected tab enables low-impedance heat transfer to the PCB.

Key Specifications

Pinout & Package

The VN808CMTR-32-E uses the PowerSO-36 package with an exposed VCC-connected copper tab for enhanced thermal dissipation (R_th(JC) = 1.3 °C/W). Pin layout includes eight input pins (IN1–IN8), eight paired output pins (OUT1–OUT8, each requiring shorting on PCB), GND, STATUS, VCC, and NC pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VN808CMTR-E, the -32-E variant delivers higher sustained current (1 A vs. 0.7 A) and tighter R_DS(on) stability over temperature; versus TPS27082LDR, it offers monolithic octal integration with hierarchical thermal protection but trades off per-channel R_DS(on).

Availability

VN808CMTR-32-E is available at Aetrix Electronics and suitable for industrial PLC output modules, motor starter panels, smart lighting controls, and valve actuator interfaces requiring stable component supply across extended temperature and EFT stress conditions.

Supply support for VN808CMTR-32-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 specializing in power management, automotive, and industrial ICs with strong European manufacturing and quality certification.

The VN808 series belongs to ST's VIPower high-side driver product line, engineered specifically for ruggedized industrial control applications demanding integrated protection, diagnostic capability, and compliance with IEC 61131 and IEC 61000-4-4 standards.

FAQ

What is the maximum continuous output current per channel?

The VN808CMTR-32-E supports 1 A DC per channel under normal operating conditions (10.5–45 V V_CC, –40 to 125 °C). Current limitation activates at 0.7–1.7 A depending on load and thermal conditions, and thermal shutdown occurs if junction temperature exceeds 150–200 °C. Derating is required above 100 °C case temperature.

How does the STATUS pin indicate fault conditions?

The STATUS pin is an open-source output that pulls high (sinking up to 4 mA) during junction overtemperature (TJ > TJSD), case overtemperature (TC > TCSD), or undervoltage lockout (V_CC < 7 V). It remains low during normal operation and provides a single-wire diagnostic interface for microcontrollers to detect and log faults across all eight channels.

Can the VN808CMTR-32-E drive inductive loads safely?

Yes - it includes built-in protections for inductive loads: active current limitation prevents destructive peak currents, dV_OUT/dt control (1.5 V/µs turn-off) suppresses voltage spikes, and output clamping (V_DEMAG = V_CC–47 to V_CC–57 V) limits flyback energy. External freewheeling diodes are not required, though layout best practices for inductance minimization remain essential.

What is the recommended PCB layout for thermal performance?

Mount the PowerSO-36 package on ≥0.5 cm² of 35 µm-thick copper connected to all TAB pins (pins 1 and 36). Use multiple thermal vias under the tab to inner ground/power planes. Keep IN/OUT traces short and separated; route GND directly to the 19-pin pad with minimal impedance. Avoid routing sensitive analog traces near the high-current output paths.