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Texas Instruments LMK60E0-156M25SIAT
- Part No.:
- LMK60E0-156M25SIAT
- Manufacturer:
- Texas Instruments
- Category:
- Oscillators
- Package:
- 6-SMD Module
- Datasheet:
-
LMK60E0-156M25SIAT.pdf
- Description:
- SILIC OSC XO 156.2500MHZ LVPECL
- Quantity:
- Payment:
- Shipping:
Inventory:3,561
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Product details
Overview
LMK60E0-156M25SIAT from Texas Instruments is a factory-programmed, low-jitter LVPECL oscillator delivering 156.25 MHz with ±25 ppm total frequency stability 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 robust PSRR (–60 dBc) and differential output integrity.
For engineers reviewing the LMK60E0-156M25SIAT datasheet, LMK60E0-156M25SIAT pinout, LMK60E0-156M25SIAT application, or LMK60E0-156M25SIAT equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternatives for telecom infrastructure, server clocking, and high-speed serial interface design.
Technical Context
The LMK60E0-156M25SIAT integrates a high-performance PLL-based oscillator core with internal power conditioning to suppress supply noise, enabling stable 156.25 MHz LVPECL output without external crystal or loop filter components. Its architecture supports deterministic startup (<10 ms), fast OE-controlled enable/disable (<50 µs), and operation across industrial temperature range.
It uses a fixed-output configuration-no I²C or frequency programming-making it a drop-in replacement for legacy XO modules. The device's 7 mm × 5 mm QFM (SIA) package maintains pin compatibility with industry-standard 7050-footprint oscillators while delivering superior jitter performance versus quartz-based solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 156.25 MHz - precisely matches Ethernet 10GBASE-R, CPRI, and PCIe Gen3 reference clock requirements. |
| Output Format | LVPECL - provides 700–1200 mV differential swing into 100 Ω loads, compatible with TI, Intel, and Xilinx high-speed receivers. |
| Frequency Stability | ±25 ppm - includes initial tolerance, temperature drift (–40°C to +85°C), voltage variation, solder reflow shift, and 5-year aging at 40°C. |
| Phase Jitter (RMS) | 150 fs typical (12 kHz–20 MHz) - meets stringent SerDes jitter budgets for 10G/25G interfaces and FPGA transceivers. |
| PSRR | –60 dBc at 50 kHz–1 MHz - rejects power rail noise without additional filtering, simplifying PDN design. |
| Supply Voltage | 3.3 V ±5% - operates within standard logic rail tolerances; draws 95–110 mA in active LVPECL mode. |
| Startup Time | ≤10 ms - ensures reliable clock availability after power-on reset in server and networking equipment. |
Pinout & Package
The LMK60E0-156M25SIAT is housed in a 7.0 mm × 5.0 mm × 1.15 mm QFM (SIA) 6-pin package with exposed thermal pad, pin-compatible with industry-standard 7050 XO footprints. Pin 1 is marked by index area; no lead finish plating beyond NIAU (Nickel-Iridium-Au).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | LVCMOS input | Output enable with internal pullup; drives outputs to high-Z when pulled low; VIH ≥ 1.4 V, VIL ≤ 0.6 V. |
| 2 (NC) | No connect | Unbonded die pad; must remain floating-no routing or grounding permitted. |
| 3 (GND) | Ground | Primary analog/digital ground reference; requires ≥3 thermal vias to inner ground plane for thermal reliability. |
| 4 (OUTN) | Differential output (LVPECL) | Inverted LVPECL output; 100 Ω termination required to VDD–2 V; common-mode = VDD–1.45 V. |
| 5 (OUTP) | Differential output (LVPECL) | Non-inverted LVPECL output; paired with OUTN; differential swing = 700–1200 mV (VOH–VOL). |
| 6 (VDD) | Power supply | 3.3 V ±5% analog supply; bypassing requires 10 µF, 1 µF, and 0.1 µF capacitors placed close to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low phase jitter | 150 fs RMS (12 kHz–20 MHz) enables compliance with IEEE 802.3bj, OIF CEI-28G, and PCI-SIG Gen4+ jitter masks. |
| Integrated power conditioning | –60 dBc PSRR across 50 kHz–1 MHz eliminates need for dedicated LDO or ferrite beads on VDD line. |
| Factory-trimmed frequency accuracy | ±25 ppm total stability avoids post-solder calibration or external trimming components. |
| Fast output control | 50 µs OE enable/disable time supports dynamic clock gating in power-managed systems. |
| Thermally optimized package | QFM (SIA) with exposed pad achieves 49.0 °C/W junction-to-board thermal resistance under JEDEC 4-layer board conditions. |
Applications
| 10G/25G Ethernet Line Cards | Baseband Unit (BBU) Timing |
|---|---|
|
Use Scenario: Reference clock generation for 10GBASE-R PHYs and 25G Ethernet MACs in carrier-grade switches and routers. IC Role / Device Role / Timing Role: Primary low-jitter clock source synchronizing SERDES lanes and packet processing clocks. Use Value: 150 fs jitter ensures <0.5 UI total jitter at 10.3125 Gbps, meeting IEEE 802.3ae mask requirements without retiming. |
Use Scenario: Synchronizing multi-carrier LTE/5G baseband processing units in distributed BBU architectures. IC Role / Device Role / Timing Role: Stable 156.25 MHz reference for FPGA-based digital up/down converters and CPRI framer logic. Use Value: ±25 ppm stability over –40°C to +85°C eliminates need for oven-controlled oscillators in outdoor cabinet deployments. |
| FPGA Transceiver Clocking | Server Memory Interface Timing |
|
Use Scenario: Providing clean reference clocks to Xilinx UltraScale+ or Intel Stratix 10 GTY/GX transceivers. IC Role / Device Role / Timing Role: Low-noise clock feeding transceiver PLLs to minimize bit error rate in high-speed serial links. Use Value: LVPECL output directly interfaces with FPGA differential clock inputs without level-shifting or AC coupling. |
Use Scenario: Clocking DDR4/DDR5 memory controllers and RAS chips in dual-socket servers and AI accelerators. IC Role / Device Role / Timing Role: System-level timing reference ensuring synchronous alignment between CPU, memory controller, and I/O die. Use Value: Robust PSRR prevents supply ripple from inducing timing skew across memory channels during burst writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-jitter oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMK60E2-156M25SIAT | Same 156.25 MHz LVPECL output but ±50 ppm total stability (vs. ±25 ppm); identical pinout and package. | Suitable for cost-sensitive designs where tighter aging/temp drift isn't required (e.g., enterprise storage vs. telecom). | Select if budget constraints outweigh long-term stability needs; verify system-level jitter margin allows ±50 ppm drift. |
| Si510-156M25-AG | 156.25 MHz LVPECL output, ±20 ppm stability, but uses different 5 mm × 3.2 mm package and non-pin-compatible pinout. | Requires PCB redesign; offers programmable features (I²C) not present in LMK60E0 series. | Choose only if future frequency flexibility or multi-output capability is needed; not a drop-in replacement. |
Compared with LMK60E2-156M25SIAT, the LMK60E0-156M25SIAT delivers tighter frequency stability at higher cost, while Si510-156M25-AG trades pin compatibility for programmability-making the LMK60E0 optimal for fixed-frequency, high-reliability deployments where layout reuse is critical.
Availability
LMK60E0-156M25SIAT is available at Aetrix Electronics and suitable for 10G/25G Ethernet line cards, 5G baseband units, and FPGA-based accelerator platforms requiring stable component supply across extended product lifecycles.
Supply support for LMK60E0-156M25SIAT 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 leader specializing in analog, embedded processing, and clock solutions, with decades of expertise in high-performance timing devices for communications and computing.
The LMK60XX family was designed specifically for replacing quartz-based oscillators in high-speed digital systems-delivering lower jitter, better PSRR, and simplified layout without sacrificing footprint compatibility.
FAQ
Is LMK60E0-156M25SIAT pin-compatible with standard 7050-package oscillators?
Yes. It uses a 7 mm × 5 mm QFM (SIA) 6-pin package with identical pad layout and pin assignments (OE, NC, GND, OUTN, OUTP, VDD) as industry-standard 7050 XOs, enabling direct PCB footprint reuse without redesign.
What is the recommended power supply decoupling network?
Texas Instruments specifies three parallel capacitors: 10 µF (bulk), 1 µF (mid-frequency), and 0.1 µF (high-frequency), all mounted on the component side with shortest possible traces to VDD and GND pins, plus ≥3 thermal vias under the exposed pad.
Can LMK60E0-156M25SIAT drive 50 Ω differential loads?
No. LVPECL output requires 100 Ω differential termination to VDD–2 V (not ground). Driving 50 Ω loads will violate VOH/VOL specifications and degrade jitter; use LVDS or HCSL variants (e.g., LMK60I2-156M) for 50 Ω systems.
Does OE pin require an external pull-up resistor?
No. OE has an internal weak pullup; driving it low (≤0.6 V) disables outputs, while leaving it unconnected enables them. External pull-up is unnecessary and may increase current draw during enable transitions.
LMK60E0-156M25SIAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMK60XX
- Package/Case:
- 6-SMD Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Base Resonator:
- Silicon
- Type:
- XO (Standard)
- Frequency:
- 156.25 MHz
- Function:
- Enable/Disable
- Output:
- LVPECL
- Voltage - Supply:
- 3.3V
- Frequency Stability:
- ±25ppm
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 110mA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-QFM (7x5)
- Size / Dimension:
- 0.276" L x 0.197" W (7.00mm x 5.00mm)
- Height - Seated (Max):
- 0.045" (1.15mm)
LMK60E0-156M25SIAT FAQ
1.How can I place an order for LMK60E0-156M25SIAT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMK60E0-156M25SIAT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMK60E0-156M25SIAT reliable?
The price and inventory of LMK60E0-156M25SIAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMK60E0-156M25SIAT is usually 5 days.
3.What payment methods are accepted for LMK60E0-156M25SIAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMK60E0-156M25SIAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMK60E0-156M25SIAT?
LMK60E0-156M25SIAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMK60E0-156M25SIAT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMK60E0-156M25SIAT?
For technical support, including LMK60E0-156M25SIAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMK60E0-156M25SIAT requirements.
6.How does Aetrix verify that LMK60E0-156M25SIAT is sourced from the original manufacturer or authorized distributors?
All LMK60E0-156M25SIAT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMK60E0-156M25SIAT meets industry standards.
7.What is the process for return or replacement of LMK60E0-156M25SIAT?
All LMK60E0-156M25SIAT units undergo pre-shipment inspection (PSI). If there is an issue with LMK60E0-156M25SIAT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMK60E0-156M25SIAT part is unused and in its original packaging.
Return procedure for LMK60E0-156M25SIAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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