NXP Semiconductors EM783-SCE

Overview

EM783-SCE from NXP is an energy measurement application processor integrating a metrology engine with 1% accuracy, ARM Cortex-M0 core (up to 48 MHz), 32 kB flash, 8 kB SRAM, and 4 kB EEPROM for calibration storage - deployed in smart plugs, residential meters, and server power monitors.

For engineers reviewing the EM783-SCE datasheet, EM783-SCE pinout, EM783-SCE application, or EM783-SCE equivalent, key selection factors include metrology accuracy (1%), dynamic range (1000:1), power-line frequency tracking (45–65 Hz), on-chip temperature sensor (±3 °C), and configurable single/multi-channel variants supporting kWh computation and API-driven data readout.

Technical Context

The EM783-SCE implements a dedicated metrology engine that performs real-time calculations of active/reactive/apparent power, power factor, Vrms/Irms, THD, and line frequency - all compensated for temperature drift using its integrated ±3 °C sensor. It supports scalable AC input (120/230 V) and maintains 1% accuracy across a 1000:1 dynamic range below full-scale current.

Based on an ARM Cortex-M0 CPU running at up to 48 MHz, the device executes open-source kWh generation firmware and exposes a hardware abstraction API for initialization, start/stop control, and register-level metrology data access via UART, SPI, or I²C peripherals.

Key Specifications

Pinout & Package

EM783-SCE is housed in a 33-pin HVQFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per variant configuration; SC/SP variants allocate up to 22 GPIOs depending on peripheral enablement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar energy measurement application processor applications.

Compared with EM783-SP and EM783-MC3, the EM783-SCE offers the highest CPU speed (48 MHz), largest memory (32 kB flash / 8 kB SRAM), and broadest configuration support - making it the most flexible variant for prototyping and scalable meter designs requiring future firmware expansion or enhanced real-time analytics.

Availability

EM783-SCE is available at Aetrix Electronics and suitable for smart plug development, residential meter certification, and server power monitoring applications requiring stable component supply and long-term metrology performance consistency.

Supply support for EM783-SCE 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The EM783 family is part of NXP's energy measurement portfolio, designed specifically to integrate metrology accuracy, ARM-based programmability, and peripheral flexibility into compact, cost-optimized SoCs for utility and smart-energy applications.

FAQ

What is the metrology accuracy specification for the EM783-SCE?

The EM783-SCE delivers metrology accuracy of up to 1% across its operating range. This specification applies to active power (W) measurement under standard conditions: 120/230 V AC input, 45–65 Hz line frequency, and current loads spanning a 1000:1 dynamic range below full scale. The EM783-SCE achieves this accuracy using on-chip calibration stored in its 4 kB EEPROM and real-time temperature compensation from its integrated ±3 °C sensor.

Does the EM783-SCE support three-phase energy measurement?

No, the EM783-SCE does not support native three-phase measurement. It is configured for single-channel or single-phase operation. For three-phase applications, NXP specifies the EM783-TP variant, which provides 3× current and 3× voltage analog inputs and is rated for 2% accuracy. The EM783-SCE retains full metrology engine functionality but is limited to one or two current inputs depending on configuration.

What memory resources are available on the EM783-SCE?

The EM783-SCE integrates 32 kB of on-chip flash memory for program storage, 8 kB of SRAM for runtime variables and stack, and 4 kB of EEPROM dedicated to calibration parameters and energy consumption logs. This memory allocation supports complex kWh computation algorithms, API-driven host interaction, and long-term data retention without external non-volatile storage.

Which communication interfaces does the EM783-SCE support?

The EM783-SCE supports UART (with IrDA/RS-485 compatibility), SPI, I²C, and up to 22 GPIOs - many of which can be configured as counter/timer or watchdog inputs. These interfaces enable direct connection to LCD displays, external sensors, DALI/KNX transceivers, and host microcontrollers without level-shifting or protocol translation ICs.

Is there evaluation hardware available for the EM783-SCE?

Yes - NXP provides a dedicated EM783 evaluation platform featuring an LCD panel and USB interface. While the base board supports multiple EM783 variants, the EM783-SCE is fully compatible and can be programmed and tested using the included PC application for real-time graphing of voltage, current, harmonics, and power metrics. Schematics and firmware are available for download from NXP's official support portal.