Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

STMicroelectronics STM8SPLNB1P6

Name: STM8SPLNB1P6
Brand: STMicroelectronics
SKU: STM8SPLNB1P6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STM8SPLNB1P6

Manufacturer:: STMicroelectronics

Category:: Application Specific Microcontrollers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: STM8SPLNB1P6.pdf

Description:: IC MCU SLAVE DISEQC 20TSSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,448

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STM8SPLNB1P6 from STMicroelectronics is an 8-bit DiSEqC™ slave microcontroller designed for satellite low-noise block (LNB) and switcher control in SaTCR-based architectures. It integrates dual DiSEqC interfaces, four I²C master channels (supporting up to eight SaTCR devices), four legacy matrix output pins, internal 16 MHz oscillator, and operates from 2.95–5.5 V with LVD-based safe power management.

For engineers reviewing the STM8SPLNB1P6 datasheet, STM8SPLNB1P6 pinout, STM8SPLNB1P6 application, or STM8SPLNB1P6 equivalent, this device serves as a drop-in firmware-hardware solution for DiSEqC-compliant LNB control - requiring precise timing of 22 kHz tone bursts, coaxial DC/AC signaling compliance, and configurable I²C addressing modes for multi-SaTCR coordination.

Technical Context

The STM8SPLNB1P6 implements a dedicated DiSEqC™ slave protocol stack with hardware-level support for voltage-triggered command framing (13 V → 18 V transition), 4 ms–24 ms delay window before command transmission, and bit-level modulation per Eutelsat DiSEqC-ST specification. Its dual DRX inputs enable primary/secondary DiSEqC channel reception with priority arbitration.

It supports two I²C addressing modes - ST7LNB1-compatible (pin MODE grounded, EEPROM parameter = 0) and incremental order (MODE floating, EEPROM parameter = 1) - determining how eight SaTCR devices map across four I²C buses (I²C1–I²C4) and whether legacy matrix outputs MAT1–MAT4 remain available. Configuration parameters are stored in on-chip EEPROM and updated via DiSEqC commands 0x0F (write) and 0x0D (read).

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	8-bit STM8 CPU with 16 MHz internal oscillator - eliminates external crystal, reduces BOM cost and board space for compact LNB modules.
DiSEqC Interfaces	Dual DRX inputs (DRX1 primary, DRX2 secondary) + DTX output with 22 kHz modulation - enables redundant or multi-path DiSEqC command reception and compliant coaxial reply transmission.
I²C Master Channels	Four independent I²C masters (SCL1/SDA1 to SCL4/SDA4), each supporting two addresses (0xC8/0xCA) - allows concurrent control of up to eight SaTCR devices without software arbitration.
Legacy Matrix Outputs	Four dedicated output pins (MAT1–MAT4) - directly drive analog RF switches in legacy LNB matrices without external logic or level-shifting.
Supply Voltage Range	2.95 V to 5.5 V with integrated low-voltage detector (LVD) - ensures robust operation across varying LNB power supply conditions and enables safe brown-out reset behavior.
Operating Temperature	−40 °C to +85 °C - qualified for outdoor satellite equipment mounting in uncontrolled environmental enclosures.
Package Options	TSSOP20, SO20W (300 mil), UFQFPN20 (3 × 3 mm) - supports high-density PCB layouts and thermal-constrained LNB housings.

Pinout & Package

STM8SPLNB1P6 is available in three 20-pin packages: TSSOP20 (4.40 mm body, 0.65 mm pitch), SO20W (300 mils, 7.5 mm width), and UFQFPN20 (3 × 3 mm, 0.5 mm pitch). All variants share identical pin functionality and electrical characteristics.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pin 9 / TSSOP/SO; Pin 6 / UFQFPN)	Power supply input	+5 V ±10% main supply - must be filtered; powers core, I²C peripherals, and DiSEqC interface logic.
VSS (Pin 7 / TSSOP/SO; Pin 4 / UFQFPN)	Ground reference	Common return path for all digital and analog circuitry; requires low-impedance PCB connection to minimize noise coupling into DiSEqC receive paths.
RESET (Pin 4 / TSSOP/SO; Pin 1 / UFQFPN)	Active-low reset input	Hardware reset triggered by external pull-down or microcontroller; requires 0.1 µF capacitor to VSS for noise immunity per datasheet Figure 12.
VCAP (Pin 8 / TSSOP/SO; Pin 5 / UFQFPN)	Internal regulator bypass	Connects 1 µF ceramic capacitor to VSS - stabilizes internal voltage regulator for analog DiSEqC receiver stages and improves EMC performance.
DRX1 (Pin 3 / TSSOP/SO; Pin 20 / UFQFPN)	Primary DiSEqC data input	Receives high-frequency DiSEqC signal after external low-pass filtering; used for all standard command processing unless DRX2 is prioritized.
DRX2 (Pin 2 / TSSOP/SO; Pin 19 / UFQFPN)	Secondary DiSEqC data input	Redundant DiSEqC input path; activated only when DRX1 fails or in dual-cable configurations - lower priority per functional block diagram.
DTX (Pin 1 / TSSOP/SO; Pin 18 / UFQFPN)	DiSEqC transmit output	Drives 22 kHz modulated reply signal onto coaxial line; requires AC coupling (capacitor + inductor network) to avoid DC interference with LNB bias tee.
SCL1–SCL4 (Pins 20,12,17,15 / TSSOP)	I²C clock outputs	Open-drain outputs driving four independent I²C buses - each paired with corresponding SDA pin; supports standard-mode (100 kbps) timing.
SDA1–SDA4 (Pins 19,11,16,14 / TSSOP)	I²C data I/O	Open-drain bidirectional lines - implement master-only I²C communication to SaTCR devices; require external pull-ups (typically 2.2–4.7 kΩ).
MAT1–MAT4 (Pins 13,10,6,5 / TSSOP)	Legacy matrix control outputs	CMOS push-pull outputs driving RF switch control lines; active-high; compatible with TTL/CMOS logic levels of legacy LNB matrices.

Key Features

Feature	Design Value
DiSEqC-ST protocol compliance	Fully implements Eutelsat DiSEqC 1.0/2.0 and DiSEqC-ST extensions including ODU_Changechannel (0x5A), ODU_Config (0x5B), and tone-burst synchronized command framing.
Configurable I²C addressing mode	Two EEPROM-configurable modes: ST7LNB1-compatible (supports 4 SaTCRs + 4 legacy outputs) or incremental order (supports 8 SaTCRs across 4 buses, no legacy outputs).
On-chip EEPROM storage	Stores 128 bytes of configuration parameters (e.g., SaTCR mapping, band selection, lock status); written via DiSEqC 0x0F command and read via 0x0D.
Safe power sequencing	Integrated low-voltage detector (LVD) triggers reset below 2.7 V and holds device in reset until VDD stabilizes above 2.95 V - prevents erratic DiSEqC replies during LNB power-up/down.
Coaxial signal conditioning	Hardware-level detection of 13 V → 18 V transitions and precise 4–24 ms delay window before command acceptance - eliminates need for external timing logic or MCU intervention.

Applications

Single-LNB Switcher Control

Dual-Band LNB with SaTCR Support

Use Scenario: Consumer-grade satellite dish with single universal LNB switching between low-band (9.75 GHz) and high-band (10.6 GHz) via 22 kHz tone burst.

IC Role / Device Role / Timing Role: STM8SPLNB1P6 acts as DiSEqC slave interpreting tone bursts and controlling internal band-select switch; handles voltage-triggered command framing and I²C write to LNB tuner register.

Use Value: Eliminates need for discrete logic or external microcontroller; reduces bill-of-materials and PCB area while ensuring Eutelsat-compliant timing margins (±100 ns jitter tolerance on 22 kHz edge).

Use Scenario: Professional satellite receiver controlling dual-output LNB with separate SaTCR1/SaTCR2 modules for orthogonal polarization (H/V) and frequency band selection.

IC Role / Device Role / Timing Role: Coordinates I²C writes to two SaTCR devices over I²C1/I²C2 buses; manages DiSEqC command routing and reply generation with sub-millisecond latency.

Use Value: Enables simultaneous control of two independent RF paths without bus contention; leverages incremental addressing mode to isolate SaTCR1/SaTCR2 traffic on separate I²C buses - preventing HF interference during tuning.

Legacy Matrix-Based Multi-LNB Hub

Wideband LNB with SaTCR + Legacy Fallback

Use Scenario: Commercial satellite distribution system using 4-input RF matrix switch controlled by four discrete analog signals from a central controller.

IC Role / Device Role / Timing Role: STM8SPLNB1P6 drives MAT1–MAT4 pins directly as CMOS-level control outputs; decodes DiSEqC commands to select active RF path without I²C involvement.

Use Value: Replaces discrete transistor arrays or dedicated logic ICs; provides single-chip compatibility with legacy matrix designs while retaining DiSEqC command interface for remote configuration.

Use Scenario: Hybrid LNB supporting both modern SaTCR-based wideband reception (e.g., 290–2340 MHz) and legacy narrowband operation (e.g., 950–2150 MHz) in same housing.

IC Role / Device Role / Timing Role: Uses ST7LNB1-compatible mode to allocate I²C1/I²C2 for SaTCR control and repurposes I²C3/I²C4 pins as MAT3/MAT4 outputs - enabling dual-mode operation.

Use Value: Allows OEMs to reuse one PCB design across multiple product tiers; avoids redesign when migrating from legacy to wideband satellite standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar DiSEqC slave microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ST7LNB1M6	Legacy 8-bit ST7 core; single I²C master; no internal EEPROM; requires external configuration memory.	Limited to 2 SaTCR devices; no legacy matrix outputs; lacks DiSEqC-ST command support (0x5A/0x5B).	Select only for cost-sensitive legacy replacements where SaTCR count ≤2 and DiSEqC-ST features are unused.
STM8SPLNB1P3	Identical silicon; differs only in packaging (TSSOP20 vs. UFQFPN20) and temperature grade (−40°C to +85°C same).	No functional difference; pin-compatible but requires footprint redesign for 3×3 mm QFN layout.	Choose for space-constrained LNB modules where thermal dissipation and board area are critical; verify reflow profile compatibility.

Compared with ST7LNB1M6, STM8SPLNB1P6 adds EEPROM-based configuration, dual DiSEqC interfaces, and four I²C masters - enabling scalable SaTCR systems. Against STM8SPLNB1P3, it offers identical functionality in TSSOP20 package - simplifying legacy PCB upgrades without layout changes.

Availability

STM8SPLNB1P6 is available at Aetrix Electronics and suitable for satellite LNB control, DiSEqC switcher modules, SaTCR-based multi-band receivers, and legacy RF matrix hubs requiring stable component supply across long-lifecycle consumer and professional broadcast deployments.

Supply support for STM8SPLNB1P6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and analog/mixed-signal solutions for automotive, industrial, and consumer markets.

The STM8SPLNB1 series belongs to ST's dedicated satellite communication microcontroller product line, engineered specifically to replace discrete logic in DiSEqC-compliant LNBs and simplify SaTCR integration - targeting reduced time-to-market for satellite receiver manufacturers.

FAQ

What DiSEqC command sets does STM8SPLNB1P6 support?

STM8SPLNB1P6 supports DiSEqC 1.0/2.0 base commands (0x00 RESET, 0x0D config read, 0x0F config write, 0x38 legacy port write) plus DiSEqC-ST extensions: 0x5A (ODU_Changechannel, ODU_SatCROFF) and 0x5B (ODU_Config, ODU_EEPvar.LOFREQ, ODU_SatCRxON). All commands require proper 13 V → 18 V transition and 4–24 ms delay per Eutelsat specification.

How is I²C addressing configured between ST7LNB1-compatible and incremental modes?

ST7LNB1-compatible mode activates when MODE pin is grounded and EEPROM parameter = 0 - assigning SaTCR1–SaTCR4 across I²C1/I²C2 with two addresses each (0xC8/0xCA), freeing MAT1–MAT4. Incremental mode activates when MODE is floating or EEPROM = 1 - assigning SaTCR1–SaTCR8 sequentially across I²C1–I²C4, disabling legacy outputs.

Can STM8SPLNB1P6 drive legacy RF matrix switches without external components?

Yes. Pins MAT1–MAT4 are CMOS push-pull outputs capable of directly driving TTL/CMOS-compatible RF switch control inputs (e.g., PE4259, SKY13372). Each delivers ≥8 mA sink/source current at VDD = 5 V, eliminating need for buffer transistors or level shifters in standard matrix applications.

What is the role of the VCAP pin and what capacitor value is required?

VCAP supplies the internal voltage regulator for analog DiSEqC receiver stages. A 1 µF X7R ceramic capacitor must be placed between VCAP and VSS, as specified in datasheet Section 4.3.2 and Figure 11. This ensures stable regulation under dynamic DiSEqC signal loading and meets EMC requirements per Table 27/28.

STM8SPLNB1P6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STM8S

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Applications:: SaTCR LNBs and Switchers

Core Processor:: STM8

Program Memory Type:: -

Controller Series:: -

RAM Size:: -

Interface:: DiSEqC, I2C

Number of I/O:: -

Voltage - Supply:: 2.95V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

STM8SPLNB1P6 FAQ

1.How can I place an order for STM8SPLNB1P6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM8SPLNB1P6 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 STM8SPLNB1P6 reliable?

The price and inventory of STM8SPLNB1P6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8SPLNB1P6 is usually 5 days.

3.What payment methods are accepted for STM8SPLNB1P6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8SPLNB1P6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM8SPLNB1P6?

STM8SPLNB1P6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM8SPLNB1P6 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 STM8SPLNB1P6?

For technical support, including STM8SPLNB1P6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8SPLNB1P6 requirements.

6.How does Aetrix verify that STM8SPLNB1P6 is sourced from the original manufacturer or authorized distributors?

All STM8SPLNB1P6 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 STM8SPLNB1P6 meets industry standards.

7.What is the process for return or replacement of STM8SPLNB1P6?

All STM8SPLNB1P6 units undergo pre-shipment inspection (PSI). If there is an issue with STM8SPLNB1P6, 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 STM8SPLNB1P6 part is unused and in its original packaging.

Return procedure for STM8SPLNB1P6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…