Renesas SLG46538M-SKT

Overview

SLG46538M-SKT from Renesas Electronics is a programmable mixed-signal matrix IC with asynchronous state machine and dual-supply operation. It integrates four analog comparators, two voltage references, 19 combination function macrocells (including LUTs, DFFs, counters, filters, and oscillators), I²C interface, 8-byte RAM + OTP memory, and dual independent power domains (VDD and VDD2). It operates from −40 °C to +85 °C and supports level translation between 1.8 V and 5 V domains in handheld electronics and PC peripherals.

For engineers reviewing the SLG46538M-SKT datasheet, SLG46538M-SKT pinout, SLG46538M-SKT application, or SLG46538M-SKT equivalent, this device enables rapid prototyping of custom logic, voltage monitoring, signal conditioning, and power-domain bridging without FPGA complexity or MCU firmware overhead.

Technical Context

The SLG46538M-SKT implements a user-programmable interconnect matrix routing signals between 17 configurable I/O pins, analog comparators, oscillators (25 kHz/2 MHz RC, 25 MHz RC, crystal), and macrocells-including eight 3-bit LUTs, five 8-bit delay/counters, two 16-bit delay/counters, and a dedicated 8-state asynchronous state machine. Its dual-supply architecture isolates IO groups (pins 0–8 on VDD; pins 9,10,12–17 on VDD2) for true bidirectional level translation.

Configuration is stored in one-time-programmable (OTP) NVM, while GreenPAK Designer supports on-chip emulation via volatile configuration. The device includes read-back protection (Read Lock), Power-On Reset (POR), deglitch filters with edge detection, and I²C serial communication compliant with standard-mode timing.

Key Specifications

Pinout & Package

SLG46538M-SKT is packaged in 22-pin MSTQFN (2 mm × 2.2 mm × 0.55 mm, 0.4 mm pitch) with two no-connect (NC) pins. Pin functions are fully configurable via connection matrix; I/Os 0–8 are tied to VDD domain, while I/Os 9,10,12–17 are tied to VDD2 domain.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal logic applications.

Compared with SLG46537V and SLG46620V, SLG46538M-SKT uniquely delivers dual-supply I/O isolation with full VREF and crystal oscillator support in a compact 22-pin MSTQFN-making it the only option among the three for robust, self-contained voltage-domain bridging in portable and embedded systems.

Availability

SLG46538M-SKT is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial sensor nodes, PC motherboard fan control, smart home hub power sequencing, and handheld electronics requiring stable component supply and long-term design continuity.

Supply support for SLG46538M-SKT 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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The SLG46538 belongs to the GreenPAK™ programmable mixed-signal matrix product line, designed to replace discrete logic, analog functions, and simple controllers in cost- and space-sensitive embedded systems.

FAQ

What is the primary function of SLG46538M-SKT in a system design?

The SLG46538M-SKT serves as a field-configurable mixed-signal logic device that integrates analog comparators, digital logic (LUTs, counters, state machines), I²C interface, and dual-supply I/Os. It replaces multiple discrete components-such as comparators, level shifters, timers, and glue logic-in applications like USB-C PD adapters and sensor nodes. Its OTP configuration ensures consistent behavior across production units, and SLG46538M-SKT enables rapid iteration via GreenPAK Designer before final programming.

Does SLG46538M-SKT support true bidirectional level translation between different voltage domains?

Yes, SLG46538M-SKT supports true hardware-level bidirectional level translation using its dual-supply architecture: I/Os 0–8 connect to VDD (1.8–5 V), while I/Os 9,10,12–17 connect to VDD2 (1.8–5 V, VDD2 ≤ VDD). Internal logic can route signals across domains, and output drivers adapt to their respective supply rails. This eliminates need for external translators in SLG46538M-SKT-based designs where cross-domain signal integrity and timing predictability are critical.

How many analog comparators does SLG46538M-SKT include, and what are their input voltage ranges?

SLG46538M-SKT includes four analog comparators (ACMP0–ACMP3). Each has rail-to-rail positive input range (0 V to VDD) and negative input range up to 1.2 V regardless of supply voltage. ACMP0–ACMP3 share common negative inputs (e.g., IO9 serves as ACMP0–ACMP3 negative input), and their outputs feed directly into macrocells for conditional logic or filtering. This analog capability is integral to SLG46538M-SKT's role in voltage monitoring and event-triggered control.

Can SLG46538M-SKT be reprogrammed after initial OTP programming?

No, the OTP NVM in SLG46538M-SKT cannot be erased or rewritten once programmed. However, Renesas GreenPAK Designer supports full on-chip emulation using volatile configuration-allowing unlimited design iterations while powered. Only final validated configurations are written to OTP. SLG46538M-SKT thus balances design flexibility during development with permanent, tamper-resistant deployment in production.

What package type is used for SLG46538M-SKT, and how does it differ from SLG46538V?

SLG46538M-SKT uses the 22-pin MSTQFN package (2 mm × 2.2 mm × 0.55 mm, 0.4 mm pitch), which provides two additional I/O pins (IO15, IO16) and dual voltage reference outputs (VREF0, VREF1) compared to the 20-pin STQFN used by SLG46538V. The MSTQFN also includes two no-connect (NC) pins. This makes SLG46538M-SKT the preferred choice when designs require both VREF outputs or extra clock inputs (EXT_CLK1/EXT_CLK2), as specified in the official SLG46538M-SKT ordering information.