Texas Instruments LMK60A0-148M50SIAT

Overview

LMK60A0-148M50SIAT from Texas Instruments is a factory-programmed, low-jitter LVDS oscillator delivering 148.5 MHz output with ±25 ppm total frequency tolerance over –40°C to +85°C, 3.3-V supply, and 150 fs RMS phase jitter (12 kHz–20 MHz). It serves as a high-stability clock reference in FPGA and processor timing systems requiring precise differential signaling.

For engineers reviewing the LMK60A0-148M50SIAT datasheet, LMK60A0-148M50SIAT pinout, LMK60A0-148M50SIAT application, or LMK60A0-148M50SIAT equivalent, this page provides verified package mapping, validated LVDS output characteristics, confirmed thermal and PSRR performance, and real-world use context for telecom and data infrastructure designs.

Technical Context

The LMK60A0-148M50SIAT integrates a high-performance PLL-based oscillator core with internal power conditioning to achieve –60 dBc PSRR against 50-mV ripple at 50 kHz–1 MHz. Its LVDS output stage delivers 300–480 mV differential swing with 150–250 ps rise/fall time and 45–55% duty cycle across full temperature range.

It operates exclusively from a single 3.3-V ±5% supply, uses an internal pull-up on OE for default-enable operation, and features a 6-pin QFM (SIA) package with NC, OE, GND, OUTN, VDD, and OUTP terminals-designed for drop-in compatibility with industry-standard 7050 XO footprints.

Key Specifications

Pinout & Package

LMK60A0-148M50SIAT uses a 7 mm × 5 mm, 6-pin Quad Flat Module (QFM) package designated SIA - identical footprint to industry-standard 7050 crystal oscillators, enabling direct PCB replacement without layout changes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-jitter oscillator applications.

Compared with LMK60A0-148M50SIAT, the LMK60E0-156257SIAT shifts frequency and output format to serve Ethernet timing, while the Si510-148M500XMS trades package size and tolerance for reduced board area - neither replicates the exact 148.5 MHz LVDS + 7×5 mm + ±25 ppm combination in a pin-compatible form.

Availability

LMK60A0-148M50SIAT is available at Aetrix Electronics and suitable for video broadcast equipment, telecom line cards, FPGA-based accelerators, and server baseboard management requiring stable component supply across extended product lifecycles.

Supply support for LMK60A0-148M50SIAT 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and clock solutions for industrial, automotive, and communications markets.

The LMK60XX family is designed specifically for high-performance timing applications demanding ultra-low jitter, robust PSRR, and factory-programmed flexibility - targeting FPGA, processor, and networking infrastructure where crystal oscillators fall short.

FAQ

What is the recommended power supply decoupling for LMK60A0-148M50SIAT?

TI specifies a three-capacitor decoupling network: 10 µF (bulk), 1 µF (mid-frequency), and 0.1 µF (high-frequency), all placed as close as possible to the VDD and GND pins. Capacitors must be mounted on the component side using 0201 or 0402 packages, with short traces and low-inductance vias to the ground plane to maintain PSRR performance and minimize jitter degradation.

Can LMK60A0-148M50SIAT be used with HCSL or LVPECL loads?

No - LMK60A0-148M50SIAT is factory-configured exclusively for LVDS output. Its internal circuitry is optimized for 300–480 mVpp differential swing into 100 Ω, and driving HCSL or LVPECL loads would violate output voltage and termination specifications, risking signal integrity and device reliability. Use LMK60E2-150M for LVPECL or LMK60A0-148351 for dual-format support.

How does the OE pin behave during power-up?

The OE pin has an internal pull-up resistor, so the output is enabled by default when OE is left floating or tied to VDD. During power-up, the device asserts valid LVDS output only after VDD reaches ≥3.135 V and stabilizes for ≥10 ms (tSTARTUP). OE can be actively driven low within 50 µs to disable outputs, but no external pull-down is required for normal operation.

Is LMK60A0-148M50SIAT suitable for automotive applications?

No - LMK60A0-148M50SIAT is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. Its qualification covers JEDEC MSL3 handling and thermal reliability under industrial conditions, but it lacks automotive-specific stress testing, failure mode analysis, and extended temperature validation required for under-hood or ADAS timing use cases.