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Home > Products > Integrated Circuits (ICs) > Embedded > CPLDs (Complex Programmable Logic Devices)

Renesas SLG46538M

Name: SLG46538M
Brand: Renesas
SKU: SLG46538M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SLG46538M

Manufacturer:: Renesas

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 22-UFQFN

Datasheet:: SLG46538M.pdf

Description:: IC CPLD 19MC 22MSTQFN

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Product details

Overview

SLG46538M from Renesas Electronics is a programmable mixed-signal matrix IC with asynchronous state machine and dual-supply capability (VDD and VDD2). It integrates four analog comparators, two voltage references, 19 combination function macrocells, I²C serial interface, eight-state state machine, crystal/RC oscillators, and 8-byte RAM + OTP memory. Designed for level translation and mixed-signal bridging between independent voltage domains, it operates from −40 °C to 85 °C in 22-pin MSTQFN (2 × 2.2 × 0.55 mm).

For engineers reviewing the SLG46538M datasheet, SLG46538M pinout, SLG46538M application, or SLG46538M equivalent, this device supports rapid prototyping of custom logic, analog threshold detection, power sequencing, and bidirectional voltage-domain interfacing - especially where low-power, small-footprint, and field-programmable flexibility are required.

Technical Context

The SLG46538M implements a user-configurable interconnect matrix routing signals between 17 GPIOs, four ACMPs, two VREFs, and macrocells including LUTs, DFFs, counters, delays, filters, and an 8-state state machine. Its dual-supply architecture (VDD ≤ 5 V, VDD2 ≤ VDD) enables independent I/O bank control: IOs 0–8 reference VDD; IOs 9,10,12–17 reference VDD2.

I²C communication (SCL/SDA on IO6/IO7) allows runtime configuration and RAM access, while OTP NVM stores final firmware. The device supports Schmitt-trigger inputs, programmable drive strength (1x/2x/4x), open-drain NMOS/PMOS outputs, and deglitching with edge detection on FILTER_0/FILTER_1 - all configurable via GreenPAK Designer software without hardware changes.

Key Specifications

Parameter	Value and Actual Design Meaning
VDD Range	1.8 V (±5 %) to 5 V (±10 %); supports direct interface with 1.8 V, 3.3 V, and 5 V logic families.
VDD2 Range	1.8 V (±5 %) to VDD; enables independent voltage domain bridging (e.g., 3.3 V system ↔ 1.8 V sensor).
GPIO Count	17 programmable I/O pins (IO0–IO17), with 8 pins (IO0, IO2, IO4–IO8) supporting ACMP+/− functions.
ACMPs	Four analog comparators with rail-to-rail input range (0 to VDD) and dedicated negative input options (ACMPx−, EXT_VREF).
I²C Interface	Standard-mode (100 kHz) compliant; used for configuration, RAM read/write, and real-time monitoring.
Operating Temp	−40 °C to +85 °C; qualified for industrial and commercial embedded applications.
Package	MSTQFN-22: 2 mm × 2.2 mm × 0.55 mm, 0.4 mm pitch; exposes thermal pad for enhanced power dissipation.

Pinout & Package

SLG46538M is supplied in a 22-pin MSTQFN package (2 mm × 2.2 mm × 0.55 mm, 0.4 mm pitch) with exposed thermal pad. Pin functions are fully configurable via OTP programming, but default assignments are fixed per datasheet.

Pin/Terminal	Circuit Role	Design Meaning
IO0–IO8	VDD-referenced I/O bank	Support push-pull, open-drain NMOS/PMOS, Schmitt-trigger inputs; IO4/IO5/IO8 serve as ACMP0+/− and ACMP1+.
IO9, IO10, IO12–IO17	VDD2-referenced I/O bank	Independent voltage domain I/O; IO13/IO14 support XTAL0/XTAL1; IO15/IO16 output VREF1/VREF0; IO17 accepts EXT_CLK2.
VDD, VDD2, GND	Power rails	VDD powers first I/O bank and core logic; VDD2 powers second I/O bank; separate GND connection ensures noise isolation between domains.
SCL (IO6), SDA (IO7)	I²C interface	Open-drain NMOS only; require external pull-ups; enable in-system configuration and RAM access without reprogramming OTP.
IO13, IO14	Crystal oscillator interface	Connect external 32.768 kHz or 1–20 MHz crystal; internal load capacitance configurable via OTP.

Key Features

Feature	Design Value
Dual independent supply domains (VDD/VDD2)	Enables seamless level translation and signal conditioning between mismatched voltage rails without external translators.
Four analog comparators with shared negative inputs	Reduces external component count for multi-threshold monitoring (e.g., battery voltage, thermal cutoff, power-good sensing).
OTP + 8-byte RAM hybrid memory	Allows field-updatable runtime parameters (RAM) while preserving hardened logic configuration (OTP) across power cycles.
Configurable drive strength (1x/2x/4x) and output type	Optimizes speed vs. EMI trade-offs: 4x drive on IO8/IO9 supports fast switching into capacitive loads; open-drain modes enable wired-AND bus sharing.
Integrated deglitch filters with edge detection	Eliminates mechanical switch bounce or noisy sensor inputs without external RC networks or FPGA logic resources.
Eight-state asynchronous state machine	Implements sequenced power-up/down, fault recovery, or protocol handshaking directly in hardware - no MCU firmware overhead.

Applications

Power Sequencing Control	Multi-Rail Sensor Interface
Use Scenario: Coordinating startup/shutdown order of multiple voltage rails (e.g., 5 V → 3.3 V → 1.8 V) in FPGA or SoC systems. IC Role / Device Role / Timing Role: SLG46538M acts as autonomous power supervisor using its state machine, ACMPs, and programmable delays to monitor rail readiness and assert enable signals. Use Value: Eliminates need for discrete timers, comparators, and logic gates; reduces BOM count and PCB area by >70% versus discrete solution.	Use Scenario: Aggregating analog thresholds from multiple sensors (e.g., temperature, humidity, voltage) operating at different supply voltages. IC Role / Device Role / Timing Role: SLG46538M serves as a mixed-signal hub: ACMPs detect thresholds, VREFs provide stable references, and I²C reports status to host MCU. Use Value: Single-chip integration replaces 3–5 discrete comparators, references, and glue logic; supports simultaneous monitoring with <1 µA quiescent current per channel.
Industrial I/O Module Level Translation	USB-C Power Delivery Companion Logic
Use Scenario: Interfacing 24 V PLC inputs with 3.3 V microcontroller GPIOs while providing noise immunity and overvoltage protection. IC Role / Device Role / Timing Role: SLG46538M configures IO9–IO17 as high-voltage tolerant inputs (via external resistive dividers) and translates logic levels using VDD2 = 3.3 V. Use Value: Enables robust, programmable input conditioning without optocouplers or dedicated level shifters; Schmitt triggers suppress EMI-induced glitches.	Use Scenario: Managing CC line detection, VCONN switching, and fault signaling in USB-C PD sink designs. IC Role / Device Role / Timing Role: SLG46538M implements PD state machine logic, monitors CC voltage with ACMPs, controls VCONN FETs via IO outputs, and communicates status via I²C. Use Value: Offloads timing-critical PD handshake logic from main MCU; reduces firmware complexity and improves response time to cable attach/detach events.

Power Sequencing Control

Multi-Rail Sensor Interface

Use Scenario: Coordinating startup/shutdown order of multiple voltage rails (e.g., 5 V → 3.3 V → 1.8 V) in FPGA or SoC systems.

IC Role / Device Role / Timing Role: SLG46538M acts as autonomous power supervisor using its state machine, ACMPs, and programmable delays to monitor rail readiness and assert enable signals.

Use Value: Eliminates need for discrete timers, comparators, and logic gates; reduces BOM count and PCB area by >70% versus discrete solution.

Use Scenario: Aggregating analog thresholds from multiple sensors (e.g., temperature, humidity, voltage) operating at different supply voltages.

IC Role / Device Role / Timing Role: SLG46538M serves as a mixed-signal hub: ACMPs detect thresholds, VREFs provide stable references, and I²C reports status to host MCU.

Use Value: Single-chip integration replaces 3–5 discrete comparators, references, and glue logic; supports simultaneous monitoring with <1 µA quiescent current per channel.

Industrial I/O Module Level Translation

USB-C Power Delivery Companion Logic

Use Scenario: Interfacing 24 V PLC inputs with 3.3 V microcontroller GPIOs while providing noise immunity and overvoltage protection.

IC Role / Device Role / Timing Role: SLG46538M configures IO9–IO17 as high-voltage tolerant inputs (via external resistive dividers) and translates logic levels using VDD2 = 3.3 V.

Use Value: Enables robust, programmable input conditioning without optocouplers or dedicated level shifters; Schmitt triggers suppress EMI-induced glitches.

Use Scenario: Managing CC line detection, VCONN switching, and fault signaling in USB-C PD sink designs.

IC Role / Device Role / Timing Role: SLG46538M implements PD state machine logic, monitors CC voltage with ACMPs, controls VCONN FETs via IO outputs, and communicates status via I²C.

Use Value: Offloads timing-critical PD handshake logic from main MCU; reduces firmware complexity and improves response time to cable attach/detach events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SLG46537M	20-pin STQFN variant with identical macrocell count and feature set but fewer I/Os (15 total) and no XTAL1/EXT_CLK1 pins.	Lacks crystal oscillator support and one VDD2-referenced I/O; unsuitable for designs requiring external clock synchronization or 22-pin footprint.	Select SLG46537M only when board space is constrained and crystal interface is unnecessary.
SLG46620V	20-pin STQFN with higher macrocell count (24), additional ACMPs (6), and integrated 10-bit ADC - but no VDD2 supply or dual-domain I/O.	Cannot perform level translation between independent voltage domains; requires external level shifters for mixed-rail systems.	Choose SLG46620V when analog measurement resolution is critical and all I/O shares a single supply rail.

Compared with SLG46537M and SLG46620V, the SLG46538M uniquely delivers dual-supply I/O domain separation, crystal oscillator support, and full 22-pin configurability - making it the only option among the three for robust, self-contained mixed-voltage system control without external components.

Availability

SLG46538M is available at Aetrix Electronics and suitable for industrial automation, USB-C power delivery, PC peripheral power management, and handheld electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SLG46538M 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 design innovation, automotive MCUs, analog and power solutions, and programmable logic platforms.

The GreenPAK family - including SLG46538M - was designed to replace discrete logic, analog, and timing components with field-programmable, ultra-low-power mixed-signal ICs for cost-sensitive, space-constrained embedded systems.

FAQ

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

The SLG46538M serves as a customizable mixed-signal logic engine that replaces discrete comparators, timers, latches, level shifters, and basic state machines. Its programmable macrocells, dual-supply I/O, and I²C interface allow engineers to implement application-specific signal conditioning, power sequencing, and interface bridging - all within a single 2.2 mm × 2 mm package. Unlike fixed-function ICs, the SLG46538M's behavior is defined entirely by its OTP configuration, enabling rapid iteration without hardware changes.

Does the SLG46538M support crystal oscillator operation, and which pins are used?

Yes, the SLG46538M supports external crystal oscillator operation using IO13 (XTAL0) and IO14 (XTAL1) - both located in the VDD2-referenced I/O bank. These pins accept crystals from 32.768 kHz up to 20 MHz and include programmable internal load capacitance (6 pF, 12 pF, or 20 pF) via OTP configuration. The crystal oscillator is independent of the 25 MHz RC oscillator and 25 kHz/2 MHz configurable oscillator, allowing precise timing sources for real-time monitoring or communication protocols.

How does the dual-supply architecture (VDD and VDD2) work on the SLG46538M?

The SLG46538M separates its I/O into two electrically isolated banks: IO0–IO8 are referenced to VDD (1.8–5 V), while IO9, IO10, IO12–IO17 are referenced to VDD2 (1.8 V to VDD, with VDD2 ≤ VDD). This enables true bidirectional level translation - for example, a 3.3 V microcontroller (VDD = 3.3 V) can safely interface with a 1.8 V sensor (VDD2 = 1.8 V) using IO15/IO16 as VREF outputs and IO13/IO14 as clock inputs. No external level shifters or voltage translators are needed.

Can the SLG46538M be reprogrammed after initial OTP programming?

No - the OTP (One-Time-Programmable) memory in the SLG46538M is permanently written during final programming and cannot be erased or rewritten. However, the device includes 8 bytes of RAM accessible via I²C that retain values only while powered; this RAM supports runtime parameter updates (e.g., threshold offsets, delay values) without altering the hardened OTP logic configuration. For development, GreenPAK Designer enables full emulation on unprogrammed devices, allowing unlimited configuration iterations before committing to OTP.

What are the key differences between SLG46538M and SLG46538V?

The SLG46538M uses a 22-pin MSTQFN package and provides 17 GPIOs with full crystal oscillator support (XTAL0/XTAL1), VREF0/VREF1 outputs, and EXT_CLK0/EXT_CLK1/EXT_CLK2 inputs. The SLG46538V uses a 20-pin STQFN package with 15 GPIOs, omits XTAL1 and EXT_CLK1, and lacks VREF1 output. Both share identical macrocell count, ACMP count, state machine size, and OTP/RAM structure - but SLG46538M offers greater I/O flexibility and mixed-signal interface options for complex multi-rail systems.

SLG46538M Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 22-UFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Programmable Type:: OTP

Delay Time tpd(1) Max:: -

Voltage Supply - Internal:: 1.71V ~ 1.89V, 3V ~ 3.6V, 4.5V ~ 5.5V

Number of Logic Elements/Blocks:: -

Number of Macrocells:: 19

Number of Gates:: 1

Number of I/O:: 16

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 22-MSTQFN (2x2.2)

SLG46538M FAQ

1.How can I place an order for SLG46538M through Aetrix?

Please submit a Request for Quotation (RFQ) for SLG46538M 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 SLG46538M reliable?

The price and inventory of SLG46538M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SLG46538M is usually 5 days.

3.What payment methods are accepted for SLG46538M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SLG46538M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SLG46538M?

SLG46538M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SLG46538M 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 SLG46538M?

For technical support, including SLG46538M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SLG46538M requirements.

6.How does Aetrix verify that SLG46538M is sourced from the original manufacturer or authorized distributors?

All SLG46538M 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 SLG46538M meets industry standards.

7.What is the process for return or replacement of SLG46538M?

All SLG46538M units undergo pre-shipment inspection (PSI). If there is an issue with SLG46538M, 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 SLG46538M part is unused and in its original packaging.

Return procedure for SLG46538M:

1.Submit a request within 90 days.

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

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