NXP Semiconductors MC33593MOD868EV

Overview

MC33593MOD868EV from Freescale Semiconductor (formerly Motorola) is a PLL-tuned UHF receiver IC for 868MHz ISM-band data transfer applications. It supports OOK and FSK demodulation, delivers −105dBm RF sensitivity at 4.8kBd, consumes 7mA typical in Run mode, and features fully configurable SPI interface, integrated IF bandpass filter at 660kHz, and fast 1ms wake-up time - deployed in remote keyless entry, tire pressure monitoring, and industrial telemetry systems.

For engineers reviewing the MC33593MOD868EV datasheet, MC33593MOD868EV pinout, MC33593MOD868EV application, or MC33593MOD868EV equivalent, this page provides verified technical context, validated pin functions, real-world timing and sensitivity specs, SPI configuration behavior, and direct alternatives with documented functional trade-offs.

Technical Context

The MC33593MOD868EV implements a PLL-based local oscillator referenced to a 13.5775MHz crystal, driving an image-cancelling mixer and integrated 660kHz IF bandpass filter with 500kHz bandwidth. Its dual-path demodulator supports selectable OOK/FSK via SPI, with Manchester-coded clock recovery and ID/tone detection logic managed by an on-chip Data Manager block.

Power management uses either internal strobe oscillator cycling (configurable SR=3/7/15/31) or external STROBE pin control, enabling sleep current as low as 90µA and deterministic 1ms wake-up latency. All configuration registers (CR1–CR3) are accessed via 24-bit SPI frame with CPOL=0/CPHA=1 timing, and default POR operation requires no host MCU intervention.

Key Specifications

Pinout & Package

LQFP24 package with 0.5mm pitch, thermally enhanced exposed pad (ROMEO2 footprint), rated for −40°C to +85°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar UHF receiver applications.

Compared with MAX1473 and CC1101, the MC33593MOD868EV delivers dedicated, low-latency UHF receive functionality with minimal external components and deterministic 1ms wake-up - ideal for cost-sensitive, ultra-low-power applications where MCU resources are constrained and protocol handling is centralized.

Availability

MC33593MOD868EV is available at Aetrix Electronics and suitable for remote keyless entry, tire pressure monitoring, and industrial telemetry applications requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.

Supply support for MC33593MOD868EV 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

Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in automotive, industrial, and networking semiconductors, delivering high-performance analog and mixed-signal solutions.

The MC33593MOD868EV belongs to Freescale's ROMEO2 family of UHF receivers, designed specifically for low-power, high-sensitivity ISM-band data links in automotive security and wireless sensing applications.

FAQ

What is the exact RF frequency range supported by the MC33593MOD868EV?

The MC33593MOD868EV is factory-tuned for the 868MHz ISM band only, using a 13.5775MHz crystal reference. It does not support 902–928MHz operation - that variant is the MC33593FTA. The device achieves −105dBm sensitivity at 4.8kBd in this band with proper matching network and layout. No software or register change can shift its center frequency.

How does the MC33593MOD868EV handle Manchester-coded data clock recovery?

The MC33593MOD868EV performs hardware-based Manchester clock recovery without external timing sources. It locks to the data stream's zero-crossing transitions, supporting duty cycles of 48–52% (OOK) or 45–55% (FSK). When DME=1, recovered clock is output on SCLK; raw DMDAT remains available regardless of DME state. This eliminates need for MCU-level bit-synchronization logic.

Can the MC33593MOD868EV operate without an external microcontroller?

Yes - the MC33593MOD868EV supports standalone operation after Power-On Reset (POR). With default configuration (DME=0, MOD=0, SOE=1), it outputs raw demodulated data on DMDAT and MOSI, requires no SPI interaction, and enters sleep/run cycling autonomously. An external pull-up on RESETB ensures default mode activation without MCU intervention.

What is the function of Pin 7 (PFD) on the MC33593MOD868EV?

Pin 7 (PFD) provides access to the phase-frequency detector output voltage inside the PLL loop. It is used to monitor or externally compensate the VCO control loop - for example, adding an external RC filter (C1=4.7nF, C2=390pF, R=1kΩ) improves phase noise and spurious performance. Leaving PFD unconnected maintains standard operation with internal loop filtering.

Does the MC33593MOD868EV support both OOK and FSK demodulation simultaneously?

No - the MC33593MOD868EV supports OOK or FSK demodulation exclusively, selected at runtime via the MOD bit (bit 4) in Configuration Register 1. Switching modulation type requires SPI reconfiguration and full receiver reset. Each mode uses distinct AGC reference paths (CAGC capacitor) and data slicer thresholds, making concurrent operation impossible.