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Renesas X40014V8-A
- Part No.:
- X40014V8-A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
X40014V8-A.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:542
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Product details
Overview
X40014V8-A from Intersil is a dual-voltage monitor IC with integrated CPU supervisor, featuring active-HIGH RESET output, programmable VTRIP1/VTRIP2 thresholds (2.55–2.65V / 1.25–1.35V), 200ms power-on reset timeout, and 200ms watchdog timer - used in industrial process control systems to ensure reliable microcontroller startup and brownout recovery.
For engineers reviewing the X40014V8-A datasheet, X40014V8-A pinout, X40014V8-A application, or X40014V8-A equivalent, key selection considerations include its VCC-supplied V2MON architecture, I²C-compatible 400kHz serial interface, 25µA standby current with watchdog enabled, and SOIC-8/TSSOP-8 package compatibility for space-constrained embedded supervision.
Technical Context
The X40014V8-A implements two independent voltage comparators: V1MON (VCC) with user-programmable trip point (2.55–2.65V) and V2MON powered by VCC (not self-biased), monitoring secondary supply at 1.25–1.35V. Its reset logic asserts active-HIGH RESET upon VCC drop below VTRIP1 and holds for tPURST = 200ms after recovery.
Watchdog functionality uses SDA/SCL edge detection to restart a 200ms timer; failure triggers active-LOW WDO. The device integrates fault detection register (FDR) with volatile LV1F/LV2F/WDF bits readable via I²C address 0xFF, and supports nonvolatile control register writes for PUP/WD bit configuration using WEL/RWEL latches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP1 Range | 2.55–2.65V: Factory-set threshold for primary supply (VCC) monitoring; programmable via high-voltage sequence on WDO/SDA. |
| VTRIP2 Range | 1.25–1.35V: Secondary voltage trip point for V2MON input; requires VCC power to operate. |
| tPURST | 200ms: Factory-default power-on reset timeout; ensures stable oscillator and FPGA configuration before processor release. |
| Watchdog Interval | 200ms: Selectable watchdog timeout; prevents runaway code by asserting WDO if SDA edge + stop condition not received within window. |
| Standby Current | 25µA typical: Measured with watchdog enabled; enables low-power supervision in always-on industrial nodes. |
| I²C Interface | 400kHz: Full-speed I²C-compliant serial bus; supports random reads/writes to FDR (0xFF), CR (0x1FF), and threshold registers. |
| Supply Range | 2.7–5.5V: Operates across wide rail range; supports 3.3V and 5V systems without external regulators. |
Pinout & Package
Package: 8-pin SOIC (X40014V8-A) and TSSOP - RoHS-compliant, JEDEC MS-012AC / MO-153 compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V2FAIL (Pin 1) | Open-drain fail indicator | Asserts LOW when V2MON < VTRIP2; no internal POR delay - used for immediate power-fail interrupt or OR-ed reset assertion. |
| V2MON (Pin 2) | Secondary voltage input | Monitors external supply (e.g., 1.2V core); comparator powered by VCC - invalid if VCC = 0. |
| RESET (Pin 3) | Active-HIGH CMOS reset output | Drives HIGH during VCC brownout or POR; holds for 200ms after VCC > VTRIP1 - directly interfaces to µC nRESET inputs requiring active-HIGH assertion. |
| VSS (Pin 4) | Ground reference | Common return for all analog/digital circuitry; must be low-impedance connection to avoid threshold shift. |
| SDA (Pin 5) | Bidirectional I²C data line | Open-drain interface with internal pull-down; used for register read/write and watchdog kick (SDA edge + stop). |
| SCL (Pin 6) | I²C clock input | Master-generated clock up to 400kHz; synchronizes all serial transfers and watchdog timing events. |
| WDO (Pin 7) | Active-LOW watchdog output | Asserts LOW on watchdog timeout; can be connected to µC interrupt or external reset logic; also serves as programming voltage input for VTRIPx writes. |
| VCC (Pin 8) | Primary supply input | Powers entire IC including V2MON comparator; valid from 2.7V to 5.5V; RESET remains valid down to 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | V1MON (VCC) and V2MON (secondary rail) with separate trip points - enables simultaneous supervision of main and core supplies in multi-rail systems. |
| User-programmable thresholds | VTRIP1 and VTRIP2 adjustable via high-voltage write sequence on WDO/SDA - eliminates need for external resistor dividers in precision applications. |
| Fault detection register (FDR) | Volatile 8-bit register (address 0xFF) with LV1F/LV2F/WDF flags - allows firmware to distinguish brownout, power-fail, or watchdog-induced resets. |
| Configurable power-on reset delay | Four selectable tPURST options (50/200/400/800ms) stored in nonvolatile control register - matches diverse oscillator stabilization times across platforms. |
| Low-power I²C supervision | 25µA standby current with watchdog active - suitable for battery-backed or energy-harvesting industrial sensors requiring continuous monitoring. |
Applications
| Industrial Process Control | Network Storage Arrays |
|---|---|
Use Scenario: Monitoring 3.3V system rail and 1.2V FPGA core supply in PLC backplane modules subject to voltage transients during relay switching. IC Role / Device Role / Timing Role: X40014V8-A provides active-HIGH RESET to hold CPU in reset during VCC dip, while V2FAIL interrupts controller on 1.2V droop - enabling graceful shutdown before data corruption. Use Value: Prevents spurious reboots and memory corruption during electromagnetic interference events by enforcing 200ms minimum reset hold time and independent dual-rail fault detection. | Use Scenario: Supervising redundant 5V and 1.2V rails in RAID controller boards where undetected brownout causes disk write errors. IC Role / Device Role / Timing Role: X40014V8-A asserts RESET on main 3.3V rail collapse and signals impending 1.2V failure via V2FAIL - triggering cache flush and safe spin-down before power loss. Use Value: Enables predictive power-fail response with 1.25–1.35V VTRIP2 accuracy, reducing uncorrectable sector errors by isolating drive activity during marginal supply conditions. |
| Communications Routers | Intelligent Instrumentation |
Use Scenario: Ensuring clean boot of ARM-based routing ASICs after hot-swap of line cards with variable inrush current. IC Role / Device Role / Timing Role: X40014V8-A delivers 200ms tPURST to accommodate slow 3.3V regulator settling, while watchdog monitors software liveliness - preventing hung forwarding engines. Use Value: Guarantees deterministic initialization across card variants by decoupling reset timing from external RC networks and adding runtime fault coverage. | Use Scenario: Supervising 3.3V microcontroller and 1.2V ADC reference in portable gas analyzers operating from Li-ion batteries with steep discharge curves. IC Role / Device Role / Timing Role: X40014V8-A tracks both rails with factory-set 2.55–2.65V and 1.25–1.35V thresholds - initiating controlled shutdown before sensor bias drift exceeds specification. Use Value: Extends usable battery life by enabling precise low-voltage cutoff without overdesigning margin into the 3.3V LDO, while maintaining measurement integrity down to 2.7V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816EPA+ | Single-supply monitor (VCC only); no V2MON input or I²C interface; fixed 2.93V reset threshold. | Lacks secondary rail monitoring and programmability - suitable only for basic POR in cost-sensitive designs without power-fail warning needs. | Select when only primary rail supervision is required and board space permits discrete resistor-divider solutions for secondary monitoring. |
| TPS3808G12DBVR | Single-channel supervisor with adjustable threshold (0.4–5V) via external resistor; no secondary monitor or I²C; 350ms min tPOR. | No V2FAIL output or fault register - cannot distinguish between VCC and V2MON faults or support predictive shutdown sequences. | Choose for simple, low-cost reset generation where dual-rail correlation and diagnostics are unnecessary. |
Compared with MAX6816EPA+ and TPS3808G12DBVR, the X40014V8-A uniquely integrates dual independent voltage supervision, I²C-configurable thresholds and timing, and volatile fault logging - making it the only option among the three that supports coordinated multi-rail power sequencing and post-fault root-cause analysis in industrial controllers.
Availability
X40014V8-A is available at Aetrix Electronics and suitable for industrial process control, network storage arrays, communications routers, and intelligent instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for X40014V8-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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.
The X40014V8-A belongs to Intersil's CPU Supervisor family, designed specifically to consolidate power-on reset, watchdog, and multi-rail voltage monitoring into a single I²C-controllable device for space- and reliability-critical embedded systems.
FAQ
What is the default power-on reset timeout setting for the X40014V8-A?
The X40014V8-A ships with a factory-default power-on reset timeout (tPURST) of 200ms. This value is stored in nonvolatile bits PUP1/PUP0 of the control register and can be reconfigured to 50ms, 400ms, or 800ms using the I²C interface and WEL/RWEL write sequence. The 200ms setting ensures sufficient time for 3.3V regulator stabilization and oscillator startup in typical industrial microcontroller applications, and is confirmed in the FN8111 datasheet Table on page 7.
Does the X40014V8-A support active-HIGH or active-LOW reset output?
The X40014V8-A provides an active-HIGH RESET output (Pin 3), distinguishing it from the X40011/X40015 variants which offer active-LOW. This CMOS output drives HIGH during VCC brownout or power-on and remains asserted until VCC exceeds VTRIP1 (2.55–2.65V) for the full tPURST period. It interfaces directly with processors requiring active-HIGH reset assertion, eliminating the need for external inverters in designs using this specific variant.
How is the secondary voltage monitor (V2MON) powered in the X40014V8-A?
In the X40014V8-A, the V2MON comparator is powered by VCC - unlike the X40010/X40011 variants where V2MON is self-biased. This means V2MON functionality ceases when VCC drops to 0V, and accurate monitoring requires VCC to be within its 2.7–5.5V operating range. The datasheet explicitly states this architecture difference on page 2 ("X40014/15 = VCC") and confirms V2FAIL remains active only until VCC falls below 1V, validating the VCC-dependent design.
Can the X40014V8-A watchdog timer be disabled?
Yes, the X40014V8-A watchdog timer can be disabled by configuring WD1/WD0 bits in the nonvolatile control register to "11", which sets the timeout period to "off". This setting persists across power cycles and is performed via the three-step I²C write sequence (02H → 06H → data byte). Disabling the watchdog removes the requirement for periodic SDA edge + stop condition signaling, simplifying firmware in applications where runtime code supervision is not required.
What is the function of the V2FAIL pin on the X40014V8-A?
The V2FAIL pin (Pin 1) is an open-drain output that goes LOW when the V2MON input voltage falls below its programmed VTRIP2 threshold (1.25–1.35V for X40014V8-A). It provides immediate notification of secondary supply failure without POR delay, enabling use cases such as interrupt-driven power-fail handling or OR-ing with RESET for enhanced system robustness. Its behavior is documented in the Pin Description table on page 3 and Principles of Operation section on page 3 of the FN8111 datasheet.
X40014V8-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.3V, 2.9V
- 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:
- 8-TSSOP
X40014V8-A FAQ
1.How can I place an order for X40014V8-A through Aetrix?
Please submit a Request for Quotation (RFQ) for X40014V8-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 X40014V8-A reliable?
The price and inventory of X40014V8-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X40014V8-A is usually 5 days.
3.What payment methods are accepted for X40014V8-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X40014V8-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X40014V8-A?
X40014V8-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X40014V8-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 X40014V8-A?
For technical support, including X40014V8-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X40014V8-A requirements.
6.How does Aetrix verify that X40014V8-A is sourced from the original manufacturer or authorized distributors?
All X40014V8-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 X40014V8-A meets industry standards.
7.What is the process for return or replacement of X40014V8-A?
All X40014V8-A units undergo pre-shipment inspection (PSI). If there is an issue with X40014V8-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 X40014V8-A part is unused and in its original packaging.
Return procedure for X40014V8-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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