NXP Semiconductors PCT2075GVX

Overview

PCT2075GVX from NXP Semiconductors is a 6-pin TSOP6 digital temperature sensor and thermal watchdog IC with ±1 °C accuracy from −25 °C to +100 °C, 0.125 °C resolution via 11-bit Sigma-Delta ADC, and programmable overtemperature shutdown (OS) output operating in comparator or interrupt mode. It serves as a system-level thermal monitor in embedded controllers and power management circuits.

For engineers reviewing the PCT2075GVX datasheet, PCT2075GVX pinout, PCT2075GVX application, or PCT2075GVX equivalent, key selection considerations include its I²C-bus Fast-mode Plus (1 MHz) interface, 2.7–5.5 V supply range, <1.0 μA shutdown current, 6-pin TSOP6 footprint, and factory-programmed default thresholds (80 °C/75 °C) - all confirmed for this exact variant.

Technical Context

The PCT2075GVX integrates an on-chip band gap temperature sensor with a dedicated 11-bit Sigma-Delta A-to-D converter, delivering 0.125 °C resolution and storing results in a two's complement Temp register. Its OS output is open-drain, configurable for active-HIGH/LOW polarity and comparator/interrupt behavior via the Configuration register (Conf).

It supports programmable sampling intervals (100 ms to 3.1 s) via the Tidle register, uses three address pins (A0 only, in TSOP6) enabling up to three devices per bus, and features bus fault time-out (25–35 ms) to prevent lock-up - all implemented independently of the conversion engine.

Key Specifications

Pinout & Package

Package: TSOP6 (SOT1353-1), plastic thin small outline package, 6 leads, 1.55 mm × 2.9 mm body size, 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital temperature sensor and thermal watchdog applications.

Compared with STLM20DD9F and MAX31826, the PCT2075GVX uniquely combines I²C Fm+ speed, programmable OS behavior, and TSOP6 compactness - making it optimal for space-constrained, digitally controlled thermal management where deterministic interrupt latency and bus scalability matter.

Availability

PCT2075GVX is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging power supplies, automotive infotainment systems, and server thermal management requiring stable component supply across long production lifecycles.

Supply support for PCT2075GVX 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal sensing and embedded control.

The PCT2075GVX belongs to NXP's precision analog sensor portfolio, designed specifically for reliable, low-power thermal supervision in resource-constrained embedded systems where accuracy, bus efficiency, and small footprint are critical.

FAQ

What is the default I²C address of the PCT2075GVX?

The PCT2075GVX uses a 3-bit address scheme with only A0 present (pins A1/A2 omitted in TSOP6). At power-up, A0 is sampled: floating = 1001000b (0x48), tied LOW = 1001001b (0x49), tied HIGH = 1001010b (0x4A). This matches Table 6 in the official datasheet and is fixed for the PCT2075GVX variant.

Does the PCT2075GVX support custom temperature thresholds at manufacture?

Yes - the PCT2075GVX can be factory-programmed with user-defined Tos and Thyst values. Examples include PCT2075GV/N005 (Tos = −5 °C, Thyst = −10 °C) and PCT2075GV/P110 (Tos = 110 °C, Thyst = 105 °C). The standard PCT2075GVX ships with default Tos = 80 °C and Thyst = 75 °C.

Can the PCT2075GVX operate with a 3.3 V supply while interfacing to a 5 V I²C bus?

Yes - the PCT2075GVX SDA and SCL inputs are overvoltage tolerant to 5.5 V, and its open-drain SDA/OS outputs can be pulled up to 5.5 V independent of VCC. This allows direct connection to 5 V I²C masters even when powered from 3.3 V, eliminating level shifters.

How does the PCT2075GVX handle concurrent I²C reads during temperature conversion?

The PCT2075GVX decouples its I²C interface from the Sigma-Delta converter. Reading the Temp register - or any register - does not interrupt ongoing conversion. The Temp register updates with a new result immediately after conversion completes, and partial reads (e.g., MSByte only) are supported without lock-up.

What is the maximum number of PCT2075GVX devices supported on a single I²C bus?

Up to three PCT2075GVX devices can share one I²C bus, as only A0 is available for address selection in the TSOP6 package (Table 6). This differs from the 8-pin variants (SO8/TSSOP8/HWSON8), which support up to 27 devices using A0–A2.