NXP Semiconductors SE95DP,118

Overview

SE95DP,118 from NXP Semiconductors is an ultra-high-accuracy digital temperature sensor and thermal watchdog IC with 13-bit Sigma-Delta ADC, ±1 °C accuracy from −25 °C to +100 °C, I²C-bus interface (400 kHz), open-drain OS output, and programmable overtemperature shutdown thresholds (Tos/Thyst). It operates across −55 °C to +125 °C and serves as a standalone thermostat or system-level thermal monitor in embedded controllers.

For engineers reviewing the SE95DP,118 datasheet, SE95DP,118 pinout, SE95DP,118 application, or SE95DP,118 equivalent, key selection considerations include its 0.03125 °C resolution, 8-device I²C bus scalability via A2–A0 address pins, OS comparator/interrupt mode configurability, 7.0 µA shutdown current, and TSSOP8 package compatibility with LM75A designs.

Technical Context

The SE95DP,118 integrates an on-chip band gap temperature sensor with a 13-bit Sigma-Delta ADC delivering 0.03125 °C resolution; only the 11 MSBs are used for LM75A compatibility (0.125 °C), and 9 MSBs for LM75 compatibility (0.5 °C). Its register bank includes Conf (configurable rate, OS mode, polarity, fault queue), Temp (read-only 13-bit two's complement), Tos/Thyst (programmable 9-bit setpoints), and ID.

OS output behavior is determined by Conf register bits: OS_COMP_INT selects comparator (thermostat) or interrupt mode; OS_POL sets active-HIGH/LOW; OS_F_QUE[1:0] configures fault queue (1/2/4/6 consecutive trips); and SHUTDOWN enables 7.0 µA shutdown mode while preserving I²C accessibility. Power-up defaults are normal mode, Tos = 80 °C, Thyst = 75 °C, OS active LOW, and 10 conversions/s.

Key Specifications

Pinout & Package

TSSOP8 package (SOT505-1), 3 mm body width, 0.65 mm pitch, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM75AIDR, SE95DP,118 delivers 4× higher resolution and autonomous OS latching; compared with SE98DP,118, it lacks ARA but offers identical thermal performance at lower system integration complexity for pure I²C designs.

Availability

SE95DP,118 is available at Aetrix Electronics and suitable for industrial controllers, network equipment, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant TSSOP8 packaging.

Supply support for SE95DP,118 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.

The SE95DP,118 belongs to NXP's precision analog sensor family, designed specifically for high-reliability thermal monitoring in systems where autonomous overtemperature response and sub-degree resolution are critical.

FAQ

What is the default power-up configuration of the SE95DP,118?

At power-up, the SE95DP,118 initializes in normal operation mode with Tos = 80 °C, Thyst = 75 °C, OS comparator mode, OS active LOW, fault queue = 1, and conversion rate = 10 conversions/s. This enables immediate standalone thermostat functionality without host initialization. The SE95DP,118 retains this behavior across POR events when VCC drops below ~1.9 V.

How does the SE95DP,118 achieve ±1 °C accuracy across −25 °C to +100 °C?

The SE95DP,118 achieves ±1 °C accuracy through factory-trimmed calibration of its on-chip band gap temperature sensor and 13-bit Sigma-Delta ADC, with post-package characterization across the full industrial range. This specification is guaranteed per NXP's product data sheet Rev. 07 and applies to measurements using the 11 MSBs of the Temp register (0.125 °C resolution). The SE95DP,118 does not require end-user calibration.

Can the SE95DP,118 operate on a 3.3 V supply rail?

Yes, the SE95DP,118 operates across 2.8 V to 5.5 V, making it fully compatible with standard 3.3 V logic systems. All I²C timing parameters, OS output drive strength, and ADC performance remain within specification at 3.3 V. The SE95DP,118 draws only 7.0 µA in shutdown mode at this voltage, supporting ultra-low-power designs.

What is the function of the A2, A1, and A0 pins on the SE95DP,118?

The A2, A1, and A0 pins are digital address inputs that configure the three LSBs of the SE95DP,118's 7-bit I²C slave address (MSBs are hardwired to 1001). Each pin accepts logic HIGH (VCC) or LOW (GND), enabling eight unique addresses (1001000 to 1001111) on a shared bus. The SE95DP,118 requires these pins to be externally terminated - floating states are undefined and must be avoided.

Does the SE95DP,118 support both I²C and SMBus protocols?

The SE95DP,118 is fully compliant with standard I²C-bus (up to 400 kHz) and supports basic SMBus packet error checking (PEC) via software implementation, but it does not implement SMBus Alert Response Address (ARA) or time-out features. For full SMBus ARA support, NXP recommends the SE98DP,118. The SE95DP,118 remains interoperable with SMBus masters in standard I²C mode.