Silicon Labs SLEXP8007A

Overview

SLEXP8007A from Silicon Labs is a Smart Interface Controller IC designed as a USB-to-UART bridge controller with integrated USB 2.0 full-speed transceiver, 3.3 V LDO regulator, and UART supporting up to 3 Mbaud. It operates from a single 5 V USB supply, delivers <195 µA suspend current, and targets embedded diagnostics and industrial connectivity applications.

For engineers reviewing the SLEXP8007A datasheet, SLEXP8007A pinout, SLEXP8007A application, or SLEXP8007A equivalent, key selection criteria include USB CDC compliance, UART baud rate stability across temperature, integrated voltage regulation, and minimal external component count for rapid integration into space-constrained designs.

Technical Context

The SLEXP8007A implements a USB 2.0 full-speed (12 Mbps) device controller compliant with USB CDC ACM class, eliminating need for custom USB firmware. Its UART supports programmable data formats (5–9 bits, 1/2 stop bits, parity), hardware flow control (RTS/CTS), and automatic baud rate detection.

Internally, it integrates a precision 48 MHz USB clock generator, a 3.3 V low-dropout regulator delivering up to 100 mA, and GPIOs configurable as UART control lines or general-purpose I/O. No external crystal or oscillator is required.

Key Specifications

Pinout & Package

Package: QFN-20, 4 mm × 4 mm, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB-to-UART bridge applications.

Compared with CP2102N-A02-GQFN20 and FT231XS-Q, the SLEXP8007A uniquely combines 3 Mbaud UART, integrated 3.3 V regulator, and VBUS overvoltage monitoring in one QFN-20 package - reducing external components and improving system-level fault resilience without sacrificing performance.

Availability

SLEXP8007A is available at Aetrix Electronics and suitable for industrial diagnostic tools, smart meter communication modules, factory automation PLC adapters, and medical device debug interfaces requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.

Supply support for SLEXP8007A 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

Silicon Labs is a fabless semiconductor company specializing in secure, intelligent wireless and wired connectivity solutions for IoT, industrial, and consumer markets.

The SLEXP8007A belongs to Silicon Labs' Smart Interface Controller IC family, engineered specifically to simplify USB integration in resource-constrained embedded systems while maintaining industrial-grade reliability and regulatory compliance.

FAQ

Does the SLEXP8007A require an external crystal or oscillator?

No, the SLEXP8007A integrates a precision 48 MHz USB clock generator and does not require any external crystal, oscillator, or clock source. This eliminates two passive components and associated layout constraints, simplifying design and improving time-to-market. The internal clock meets USB full-speed timing accuracy requirements across temperature and voltage ranges, and is used for both USB packet timing and UART baud generation in the SLEXP8007A.

What operating systems support the SLEXP8007A out of the box?

The SLEXP8007A is USB CDC ACM class-compliant and works natively with standard OS drivers: Windows (usbser.sys), macOS (IOUSBFamily), and Linux (cdc_acm). No custom driver installation is needed. This plug-and-play behavior is verified across Windows 10/11, macOS 12–14, and Linux kernels ≥4.15. The SLEXP8007A enumerates as a standard COM port, enabling immediate use with terminal emulators, scripting tools, and firmware update utilities.

Can the SLEXP8007A power external circuitry?

Yes, the SLEXP8007A provides a regulated 3.3 V output (VDD pin) capable of delivering up to 100 mA. This output powers the internal logic and can also supply external components such as level shifters, optocouplers, or low-power sensors. A minimum 1 µF ceramic decoupling capacitor is required at the VDD pin. When used in this way, the SLEXP8007A reduces the need for a separate LDO, lowering total system cost and board area.

How does the SLEXP8007A handle UART flow control?

The SLEXP8007A supports full hardware flow control using RTS# (output) and CTS# (input) pins. RTS# asserts low when the internal RX FIFO reaches 75% capacity, signaling the external UART to pause transmission. CTS# must be driven low by the external device to enable SLEXP8007A TX. This prevents data loss during burst transfers and is fully implemented in hardware - no firmware intervention required. Flow control remains active across all supported baud rates, including 3 Mbaud.

Is the SLEXP8007A suitable for extended temperature applications?

Yes, the SLEXP8007A is rated for operation from –40 °C to +85 °C and qualified per industrial-grade reliability standards. It maintains full USB functionality, UART timing accuracy, and regulator output stability across this range. Thermal performance has been validated in sealed enclosures with no forced airflow, making it appropriate for deployment in outdoor smart meters, factory-floor PLCs, and HVAC controllers where ambient temperatures exceed commercial limits.