NXP Semiconductors OM13536UL

Overview

OM13536UL from NXP Semiconductors is a low-voltage, high-performance monolithic FM IF system integrating mixer/oscillator, dual wideband limiting IF amplifiers, quadrature detector, temperature-compensated logarithmic RSSI (≥80 dB dynamic range), fast RSSI op amp, post-detection filter amplifier, and programmable data switch - all in a 24-lead TSSOP package. It operates from 2.7 V to 5.5 V with 8.6 mA typical supply current at 3 V and supports RF input up to 500 MHz for DECT and FSK/ASK data receiver applications.

For engineers reviewing the OM13536UL datasheet, OM13536UL pinout, OM13536UL application, or OM13536UL equivalent, key selection considerations include its 9.8 MHz IF architecture, 1 MHz minimum data bandwidth, CMOS/TTL-compatible power-down control (pin 8), RSSI feedback access (pin 6), and dual limiter decoupling pins enabling stable high-gain IF chain operation in portable battery-powered systems.

Technical Context

The OM13536UL implements a single-conversion FM IF architecture with a Gilbert-cell mixer (NF = 11 dB, IP3i = −9.5 dBm at 110 MHz) followed by two cascaded 330 Ω-terminated limiting IF stages delivering 92 dB total gain and 25 MHz small-signal bandwidth. Its quadrature detector drives a low-impedance DATA_OUT (min. 1 MHz BW) and feeds a post-detection Sallen-Key Bessel low-pass filter (f_c ≈ 800 kHz, G = 0 dB) with DC bias control at 1.6 V.

Internal circuitry includes a programmable data switch (closed for ~10 μs during sync-word reception) that sources/sinks 3 mA to external RC integrators, plus a rail-to-rail RSSI op amp with configurable gain/filtering via RSSI_FEEDBACK (pin 6). Power-down mode (active HIGH on pin 8) reduces ICC to 140 μA and maintains 1.6 V reference at SWITCH_OUT during standby.

Key Specifications

Pinout & Package

OM13536UL is housed in a plastic thin shrink small outline package (TSSOP24, SOT355-1), 4.4 mm body width, 24 leads, lead pitch 0.65 mm. Thermal impedance Z_th(j-a) = 117 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FM IF system applications.

Compared with SA614AD and NE605, OM13536UL delivers complete FM IF functionality in one IC - including 92 dB gain, 80+ dB RSSI, programmable data switch, and 2.7 V operation - reducing component count by ≥12 parts and enabling true single-chip DECT/FSK receiver designs.

Availability

OM13536UL is available at Aetrix Electronics and suitable for DECT cordless telephony, FSK/ASK data receivers, portable FM radio IF stages, and industrial telemetry systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for OM13536UL 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 specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with deep expertise in RF analog and mixed-signal IC design.

The OM13536UL belongs to NXP's legacy FM IF system product line, engineered specifically for high-sensitivity, low-voltage portable communication receivers - emphasizing integration, power efficiency, and DECT/FSK compliance without external IF filtering.

FAQ

What is the minimum supply voltage required for stable operation of the OM13536UL?

The OM13536UL operates reliably from 2.7 V to 5.5 V. At 2.7 V, it maintains full functionality including 92 dB IF gain, 80+ dB RSSI dynamic range, and 1 MHz data bandwidth. Performance specifications such as noise figure (11 dB) and conversion gain (9.2 dB) are guaranteed across this range per the datasheet's static characteristics table.

How does the OM13536UL implement power-down, and what happens to the data switch during standby?

The OM13536UL enters power-down when POWER_DOWN_CTRL (pin 8) is driven HIGH, reducing supply current to 140 μA. During this state, the data switch outputs a stable 1.6 V reference voltage at SWITCH_OUT to maintain charge on the external RC integrator, minimizing wake-up settling time. SWITCH_CTRL (pin 12) becomes inactive in power-down mode.

Can the OM13536UL interface directly with a 330 Ω ceramic IF filter without external matching networks?

Yes. The OM13536UL's IF_AMP_IN (pin 22), IF_AMP_OUT (pin 20), LIMITER_IN (pin 18), and LIMITER_OUT (pin 15) all present 330 Ω impedances. Its mixer output (pin 24) is internally loaded with 330 Ω, enabling direct connection to standard 330 Ω ceramic filters - eliminating external matching components and simplifying layout.

What is the purpose of the dual LIMITER_DECOUPL pins (16 and 17) on the OM13536UL?

LIMITER_DECOUPL pins 16 and 17 provide separate decoupling paths for the two limiting IF amplifier stages. Each is DC-biased at 1.23 V and requires individual 100 nF ceramic capacitors to ground. This dual-decoupling structure prevents inter-stage coupling and ensures stable 52 dB limiter gain without oscillation, especially critical at 25 MHz bandwidth.

Does the OM13536UL support crystal-based or LC-based local oscillator configurations?

Yes. The OM13536UL's oscillator section supports both configurations: crystal-based (Hartley/Colpitts up to 100 MHz; Butler up to 150 MHz) and LC-tank (up to 1 GHz). OSC_IN (pin 4) and OSC_OUT (pin 3) are designed for direct connection to external tank circuits, with internal biasing optimized for low-phase-noise operation in portable receivers.