NXP Semiconductors SA56004ETK,118

Overview

SA56004ETK,118 from NXP Semiconductors is an SMBus/I²C-compatible 11-bit remote/local digital temperature sensor with dual overtemperature alarms (ALERT and T_CRIT), ±1 °C remote accuracy via factory-trimmed diode sensing, and programmable conversion rates from 0.0625 Hz to 26 Hz. It monitors microprocessor thermal diodes or discrete transistors (e.g., 2N3904/2N3906) in server thermal management systems.

For engineers reviewing the SA56004ETK,118 datasheet, SA56004ETK,118 pinout, SA56004ETK,118 application, or SA56004ETK,118 equivalent, this device delivers precise local/remote thermal monitoring with open-drain ALERT/T_CRIT outputs, SMBus timeout support, and 8 factory-programmed slave addresses - critical for multi-sensor server board designs requiring deterministic interrupt behavior and thermal shutdown coordination.

Technical Context

The SA56004ETK,118 integrates a 11-bit Σ-Δ A/D converter with separate local and remote sensing paths, supporting two independent temperature measurement channels: on-chip bandgap-based local sensing (±2 °C) and external diode junction sensing (±1 °C). Its register-mapped architecture includes dedicated high/low/T_CRIT threshold registers, offset correction for remote channel calibration, and status flags for OPEN, BUSY, and alarm conditions.

It implements SMBus 2.0 protocol compliance with TIMEOUT detection, supports both interrupt and comparator modes for ALERT output via AM register bit D0, and features software-controlled RUN/STOP mode with <10 µA standby current. Conversion rate is set via 4-bit CR register (00h–09h), enabling adaptive sampling from 16 ms to 16 s intervals.

Key Specifications

Pinout & Package

HVSON8 package (SOT782-1): 3 mm × 3 mm × 0.85 mm body, thermally enhanced no-lead construction with exposed die pad for improved heat dissipation in compact server DIMM modules and baseboard management controllers.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar remote/local digital temperature sensor applications.

Compared with LM86IMMX/NOPB and MAX6657ESA+, the SA56004ETK,118 provides superior remote sensing precision (±1 °C) and the only HVSON8 variant among these three, enabling higher component density in thermally constrained server DIMM slots while maintaining SMBus compatibility and interrupt reliability.

Availability

SA56004ETK,118 is available at Aetrix Electronics and suitable for server thermal management, industrial PLC cabinet control, and network switch ASIC protection requiring stable component supply and long-term lifecycle assurance.

Supply support for SA56004ETK,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, with deep expertise in mixed-signal sensor design and embedded system integration.

The SA56004X family was engineered specifically for high-reliability thermal monitoring in multi-processor computing platforms, emphasizing SMBus robustness, diode interface fidelity, and fail-safe interrupt architecture for mission-critical infrastructure.

FAQ

What is the remote temperature accuracy specification for SA56004ETK,118?

The SA56004ETK,118 achieves ±1 °C remote temperature accuracy across −40 °C to +125 °C, verified via factory trimming of its D+ and D− diode bias circuitry. This accuracy applies specifically to substrate PNP diodes or discrete transistors like the 2N3904, and is documented in the SA56004X product data sheet Rev. 7. The SA56004ETK,118 maintains this specification without user calibration under nominal operating conditions.

Does SA56004ETK,118 support I²C Fast-mode operation?

Yes, the SA56004ETK,118 is fully compatible with I²C Fast-mode (400 kHz) in addition to SMBus 2.0 and I²C Standard-mode (100 kHz). Its SDATA and SCLK pins meet I²C electrical specifications including rise/fall time and bus capacitance limits, and it implements SMBus TIMEOUT detection to prevent bus lockup - a feature not required by basic I²C but essential for robust multi-device systems.

What package type does SA56004ETK,118 use, and what are its thermal characteristics?

The SA56004ETK,118 uses the HVSON8 package (SOT782-1): a 3 mm × 3 mm × 0.85 mm no-lead thermally enhanced outline with an exposed die pad. This package provides lower thermal resistance than SO8 or TSSOP8 variants, enabling efficient heat transfer from the silicon to the PCB ground plane - critical for accurate local temperature measurement in high-power-density server applications.

How many unique SMBus slave addresses does SA56004ETK,118 support?

The SA56004ETK,118 has a factory-programmed 7-bit SMBus slave address of 1001100b (0x4C), one of eight fixed options available across the SA56004X family. This specific address matches the National Semiconductor LM86, Maxim MAX6657/8, and Analog Devices ADM1032, enabling drop-in replacement in existing designs that use those devices' address mapping.

Can SA56004ETK,118 operate with a 5.0 V supply?

No, the SA56004ETK,118 is specified for 3.0 V to 3.6 V operation only. Its absolute maximum VDD rating is 3.9 V, and operation above 3.6 V risks permanent damage or parametric shift. For 5 V systems, a dedicated 3.3 V LDO regulator must be used - unlike the MAX6657ESA+, which supports up to 5.5 V and permits direct 5 V rail connection.