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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Renesas X40030S14-A

Name: X40030S14-A
Brand: Renesas
SKU: X40030S14-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: X40030S14-A

Manufacturer:: Renesas

Category:: Supervisors

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: X40030S14-A.pdf

Description:: IC SUPERVISOR 3 CHANNEL 14SOIC

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Product details

Overview

X40030S14-A from Xicor (now Renesas) is a triple-voltage CPU supervisor IC integrating power-on reset, watchdog timer, manual reset, and fault detection register. It monitors V_CC (V1), V2MON, and V3MON with factory-programmed thresholds of 4.55–4.65 V, 2.95–3.05 V, and 1.65–1.75 V respectively, asserts active-HIGH RESET, and operates from 2.7 V to 5.5 V - used in network servers for reliable multi-rail power sequencing and brownout protection.

For engineers reviewing the X40030S14-A datasheet, X40030S14-A pinout, X40030S14-A application, or X40030S14-A equivalent, this page delivers verified specifications, I²C-configurable trip points, programmable power-on reset timeout (50/200/400/800 ms), selectable watchdog intervals (25 ms / 200 ms / 1.4 s / off), and real-world use cases in communication equipment and industrial control systems.

Technical Context

The X40030S14-A implements independent voltage monitoring for three rails: V_CC (V1MON), V2MON, and V3MON - each with dedicated comparators and open-drain fail outputs (LOWLINE, V2FAIL, V3FAIL). Its reset logic generates an active-HIGH RESET signal valid down to V_CC = 1 V, with no power-up delay on LOWLINE.

It features a 400 kHz I²C-compatible 2-wire interface for nonvolatile configuration of watchdog timeout (WD1/WD0 bits), power-on reset delay (PUP1/PUP0), and reprogrammable voltage thresholds via high-voltage programming sequence on WDO. The fault detection register (FDR) provides volatile status bits for LV1F, LV2F, LV3F, WDF, and MRF to diagnose reset cause.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 5.5 V - supports wide-input industrial and telecom power rails without external regulation.
V_TRIP1 (V1)	4.55–4.65 V - factory-set threshold for main 5 V supply monitoring with ±50 mV tolerance.
V_TRIP2 (V2)	2.95–3.05 V - factory-set threshold for 3.3 V or 3 V rail monitoring; reprogrammable via I²C + high-voltage sequence.
V_TRIP3 (V3)	1.65–1.75 V - factory-set threshold for 1.8 V core rail; comparator powered directly from V3MON pin.
Power-On Reset Delay (t_PURST)	Selectable 50 / 200 / 400 / 800 ms - ensures stable oscillator startup and FPGA configuration before processor release.
Watchdog Timeout	25 ms / 200 ms / 1.4 s / disabled - configurable nonvolatile bits allow system-level failure response tuning without hardware change.
Standby Current	6 µA (watchdog off) - enables ultra-low-power supervision in always-on subsystems.
I²C Interface	400 kHz max clock rate - compatible with standard Fast-mode I²C controllers for register access and threshold calibration.

Pinout & Package

Package: 14-lead SOIC (S14) and TSSOP - RoHS-compliant, surface-mount, 150 mil body width, 1.27 mm pitch.

Pin	Circuit Role	Design Meaning
1	V2FAIL	Open-drain output asserting LOW when V2MON < V_TRIP2; used for early power-fail interrupt or OR'd with RESET.
2	V2MON	Input for second monitored voltage; comparator powered by V2MON itself (X40030/X40031), enabling operation even if V_CC = 0.
3	LOWLINE	CMOS output asserting LOW earlier than RESET when V_CC < V_TRIP1; no t_PURST delay - ideal for preemptive shutdown signaling.
4	NC	No-connect pin; must be left floating or tied to ground per layout guidelines.
5	MR	Debounced manual reset input; pulling LOW initiates system reset with t_PURST hold time after release.
6	RESET	Active-HIGH CMOS reset output (X40030/X40034); asserts HIGH during V_CC brownout or MR assertion, held for t_PURST.
7	V_SS	Digital ground reference for all internal comparators and logic.
8	SDA	Bidirectional I²C data line with open-drain output; requires external pull-up; used for register read/write and watchdog restart.
9	SCL	I²C clock input; controls timing for all serial transfers and watchdog timer restart sequences.
10	WP	Write-protect input; HIGH disables all register writes including control and threshold registers - prevents accidental configuration changes.
11	V3MON	Input for third monitored voltage; comparator powered by V3MON pin - supports unregulated rail monitoring independent of V_CC.
12	V3FAIL	Open-drain output asserting LOW when V3MON < V_TRIP3; used for core voltage fail indication or cascaded reset logic.
13	WDO	Active-LOW open-drain watchdog output; asserts when watchdog timer expires; also serves as programming voltage input for V_TRIPx reconfiguration.
14	V_CC	Main supply input powering internal logic, I²C interface, and V1MON comparator; valid from 2.7 V to 5.5 V.

Key Features

Feature	Design Value
Triple independent voltage monitoring	Simultaneous supervision of V_CC, V2MON, and V3MON with separate fail outputs - eliminates need for three discrete supervisors and reduces BOM count.
Reprogrammable voltage thresholds	V_TRIP1, V_TRIP2, V_TRIP3 adjustable via I²C + high-voltage pulse on WDO - enables field calibration for aging supplies or design revisions without PCB change.
Configurable power-on reset delay	Four selectable t_PURST values (50/200/400/800 ms) stored in nonvolatile control register - matches diverse oscillator startup times across platforms.
Integrated fault detection register (FDR)	Volatile 8-bit register at address 0xFF reporting LV1F/LV2F/LV3F/WDF/MRF status - allows firmware to distinguish brownout from watchdog timeout or manual reset.
Low-power standby mode	6 µA typical current with watchdog disabled - extends battery life in backup-supervised systems and reduces thermal load in dense server boards.
Debounced manual reset input	Internal RC debounce on MR pin eliminates need for external RC network - saves board space and improves reliability over mechanical switch bounce.

Applications

Network Server Power Sequencing	Rack-Mounted Storage Controller
Use Scenario: A dual-CPU server board requires coordinated release of 5 V, 3.3 V, and 1.8 V rails with precise timing to avoid latch-up during boot. IC Role / Device Role / Timing Role: X40030S14-A acts as centralized power supervisor - monitoring all three rails, asserting RESET only after all voltages stabilize above thresholds and t_PURST expires. Use Value: Prevents premature CPU execution and FPGA configuration corruption by enforcing strict multi-rail power-good sequencing without external logic.	Use Scenario: RAID controller in enterprise storage must detect gradual 3.3 V rail droop due to aging DC-DC converter before catastrophic data loss occurs. IC Role / Device Role / Timing Role: X40030S14-A monitors V2MON (3.3 V rail) and asserts V2FAIL to trigger firmware-initiated graceful shutdown before V_CC fails. Use Value: Enables predictive power failure handling using V2FAIL interrupt instead of waiting for full system reset - preserves cache integrity and journaling state.
Industrial PLC Mainboard	Telecom Line Card Supervision
Use Scenario: Programmable logic controller mainboard operates in harsh environments where 5 V supply may experience transient dips below 4.5 V. IC Role / Device Role / Timing Role: X40030S14-A continuously supervises V_CC and asserts RESET on first dip below 4.55 V, holding it until voltage recovers and stabilizes for t_PURST. Use Value: Guarantees deterministic recovery from brownouts without software intervention - critical for safety-critical automation logic.	Use Scenario: Carrier-grade line card uses 5 V, 3.3 V, and 1.2 V rails; requires early warning of 3.3 V failure to reroute traffic before service interruption. IC Role / Device Role / Timing Role: X40030S14-A monitors V2MON (3.3 V) and V3MON (1.2 V), driving V2FAIL/V3FAIL to FPGA for real-time health monitoring and failover decision. Use Value: Provides sub-millisecond fail detection independent of main processor - enables hardware-accelerated redundancy switching.

Network Server Power Sequencing

Rack-Mounted Storage Controller

Use Scenario: A dual-CPU server board requires coordinated release of 5 V, 3.3 V, and 1.8 V rails with precise timing to avoid latch-up during boot.

IC Role / Device Role / Timing Role: X40030S14-A acts as centralized power supervisor - monitoring all three rails, asserting RESET only after all voltages stabilize above thresholds and t_PURST expires.

Use Value: Prevents premature CPU execution and FPGA configuration corruption by enforcing strict multi-rail power-good sequencing without external logic.

Use Scenario: RAID controller in enterprise storage must detect gradual 3.3 V rail droop due to aging DC-DC converter before catastrophic data loss occurs.

IC Role / Device Role / Timing Role: X40030S14-A monitors V2MON (3.3 V rail) and asserts V2FAIL to trigger firmware-initiated graceful shutdown before V_CC fails.

Use Value: Enables predictive power failure handling using V2FAIL interrupt instead of waiting for full system reset - preserves cache integrity and journaling state.

Industrial PLC Mainboard

Telecom Line Card Supervision

Use Scenario: Programmable logic controller mainboard operates in harsh environments where 5 V supply may experience transient dips below 4.5 V.

IC Role / Device Role / Timing Role: X40030S14-A continuously supervises V_CC and asserts RESET on first dip below 4.55 V, holding it until voltage recovers and stabilizes for t_PURST.

Use Value: Guarantees deterministic recovery from brownouts without software intervention - critical for safety-critical automation logic.

Use Scenario: Carrier-grade line card uses 5 V, 3.3 V, and 1.2 V rails; requires early warning of 3.3 V failure to reroute traffic before service interruption.

IC Role / Device Role / Timing Role: X40030S14-A monitors V2MON (3.3 V) and V3MON (1.2 V), driving V2FAIL/V3FAIL to FPGA for real-time health monitoring and failover decision.

Use Value: Provides sub-millisecond fail detection independent of main processor - enables hardware-accelerated redundancy switching.

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6822EUT+T	Fixed 2.93 V / 3.08 V / 4.63 V thresholds; no I²C interface; 1.2 µA standby current.	Lacks reprogrammability and fault register; suited for cost-sensitive, static-rail designs only.	Choose MAX6822EUT+T only if threshold precision and ultra-low quiescent current outweigh configurability needs.
TPS3808G33DBVR	Single-supply monitor (3.3 V only); includes push-button reset debouncing but no multi-rail capability.	Requires two additional supervisors to match X40030S14-A's triple-monitor function - increases board area and BOM complexity.	Select TPS3808G33DBVR only for single-rail applications where footprint and simplicity are prioritized over integration.

Compared with MAX6822EUT+T and TPS3808G33DBVR, the X40030S14-A uniquely combines triple-rail supervision, I²C reprogrammability, fault diagnosis, and active-HIGH RESET in one 14-pin package - delivering higher system-level reliability and design flexibility without compromising on power or timing accuracy.

Availability

X40030S14-A is available at Aetrix Electronics and suitable for network servers, industrial PLCs, and telecom line cards requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for X40030S14-A 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

Xicor Inc., acquired by Renesas Electronics in 2008, specialized in nonvolatile memory and power management ICs for embedded systems, emphasizing high-reliability analog/mixed-signal integration.

The X40030 series was designed as a highly integrated CPU supervisor targeting communication infrastructure and industrial control - consolidating reset, watchdog, multi-rail monitoring, and diagnostics into a single I²C-configurable device.

FAQ

What is the default power-on reset timeout setting for the X40030S14-A?

The X40030S14-A ships with factory-default power-on reset timeout (t_PURST) set to 200 ms, controlled by PUP1/PUP0 bits in the nonvolatile control register. This value can be changed to 50 ms, 400 ms, or 800 ms via I²C write to address 1FFh after enabling WEL and RWEL latches. The setting persists across power cycles.

Does the X40030S14-A support reprogramming of its voltage thresholds in-system?

Yes, the X40030S14-A supports in-system reprogramming of V_TRIP1, V_TRIP2, and V_TRIP3 using a defined I²C sequence plus a 12 V pulse applied to the WDO pin. The procedure requires applying the target threshold voltage to the corresponding MON pin, issuing a START condition, sending slave address A0h, byte address (01h/09h/0Dh), and data 00h, then pulling WDO LOW to complete.

How does the X40030S14-A indicate the cause of a system reset?

The X40030S14-A uses the volatile Fault Detection Register (FDR) at I²C address 0xFF to report reset cause: LV1F (V_CC brownout), LV2F (V2MON fail), LV3F (V3MON fail), WDF (watchdog timeout), and MRF (manual reset). Firmware reads this register immediately after reset to determine root cause and initiate appropriate recovery.

What is the function of the LOWLINE pin on the X40030S14-A?

The LOWLINE pin on the X40030S14-A is a CMOS output that goes LOW when V_CC falls below V_TRIP1, with no power-up delay circuitry. Unlike RESET, it responds immediately to undervoltage events - enabling early warning for firmware-controlled shutdown or hardware-level power cutover before full reset assertion.

Can the X40030S14-A monitor voltages lower than its own V_CC supply?

Yes - the V2MON and V3MON comparators in the X40030S14-A are powered directly from their respective input pins (not V_CC), allowing them to monitor voltages as low as 0.9 V even when V_CC is absent or below operational range. This enables true independent multi-rail supervision critical for unregulated supply monitoring.

X40030S14-A Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Multi-Voltage Supervisor

Number of Voltages Monitored:: 3

Voltage - Threshold:: 1.8V, 2.9V, 4.6V

Output:: Push-Pull, Totem Pole

Reset:: Active High

Reset Timeout:: Adjustable/Selectable

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

X40030S14-A FAQ

1.How can I place an order for X40030S14-A through Aetrix?

Please submit a Request for Quotation (RFQ) for X40030S14-A 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 X40030S14-A reliable?

The price and inventory of X40030S14-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X40030S14-A is usually 5 days.

3.What payment methods are accepted for X40030S14-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X40030S14-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for X40030S14-A?

X40030S14-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your X40030S14-A 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 X40030S14-A?

For technical support, including X40030S14-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X40030S14-A requirements.

6.How does Aetrix verify that X40030S14-A is sourced from the original manufacturer or authorized distributors?

All X40030S14-A 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 X40030S14-A meets industry standards.

7.What is the process for return or replacement of X40030S14-A?

All X40030S14-A units undergo pre-shipment inspection (PSI). If there is an issue with X40030S14-A, 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 X40030S14-A part is unused and in its original packaging.

Return procedure for X40030S14-A:

1.Submit a request within 90 days.

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

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