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Renesas X40415S8I-C
- Part No.:
- X40415S8I-C
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X40415S8I-C.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:859
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Product details
Overview
X40415S8I-C from Intersil is a dual-voltage supervisor IC with integrated 4kbit EEPROM, watchdog timer, and power-on reset control - featuring programmable VTRIP1 (2.55–2.65V) and VTRIP2 (1.25–1.35V) thresholds, 200ms default power-on reset timeout, and 200ms watchdog interval. It operates from 2.7V to 5.5V and serves as a system-level CPU supervisor in industrial embedded controllers requiring reliable brownout detection and nonvolatile configuration storage.
For engineers reviewing the X40415S8I-C datasheet, X40415S8I-C pinout, X40415S8I-C application, or X40415S8I-C equivalent, key selection considerations include its dual independent voltage monitoring (VCC + V2MON), open-drain WDO/RESET outputs, 400kHz I²C-compatible 2-wire interface, Block Lock™ EEPROM protection, and factory-programmed reset timing - all in an 8-pin SOIC package.
Technical Context
The X40415S8I-C implements two independent comparator-based voltage monitors: V1MON (VCC) with user-adjustable trip point (2.55–2.65V) and V2MON (second supply) with adjustable trip point (1.25–1.35V), where V2MON is powered by VCC (unlike X40411). Its watchdog timer uses SDA/SCL edge detection to restart on valid I²C start/stop sequences, with nonvolatile WD1/WD0 bits selecting 25ms/200ms/1.4s/off intervals.
Power-on reset assertion is controlled by PUP1/PUP0 bits (default 01 = 200ms tPURST), while fault detection register (FDR) provides volatile status bits for LV1F, LV2F, and WDF. The 4kbit EEPROM is organized as 512 × 8, supports 16-byte page writes, and features Direct Write™ cells rated for ≥100,000 write cycles and ≥100 years data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP1 Range | 2.55V–2.65V: Factory-set low-VCC reset threshold; reprogrammable via high-voltage sequence on WDO pin. |
| VTRIP2 Range | 1.25V–1.35V: Adjustable second-supply fail threshold; requires VCC power (X40415 variant). |
| Power-on Reset Timeout | 200ms (factory default): Configurable to 50ms/200ms/400ms/800ms via PUP1/PUP0 bits in control register. |
| Watchdog Timeout | 200ms (factory default): Selectable 25ms/200ms/1.4s/off via WD1/WD0 bits; triggered by missing SDA edge during SCL toggle. |
| EEPROM Capacity | 4kbit (512 × 8): Supports 16-byte page writes; 5ms typical write cycle; Block Lock™ protects upper/lower half or none. |
| I²C Interface Speed | 400kHz max: Fully compatible with standard-mode and fast-mode I²C buses; open-drain SDA/SCL with internal logic. |
| Supply Voltage Range | 2.7V–5.5V: Operates across 3V and 5V systems; RESET remains valid down to VCC = 1V. |
Pinout & Package
Package: 8-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: V2FAIL | Open-drain V2 voltage fail output | Asserts LOW when V2MON < VTRIP2; no power-up delay; requires external pull-up for active-HIGH logic use. |
| 2: V2MON | Second-supply monitor input | Input referenced to VCC (X40415); monitors 1.1–1.2V or 1.5V rails directly or via resistor divider; tied to VSS/VCC if unused. |
| 3: RESET/RESET | Active-HIGH CMOS reset output | Asserts HIGH when VCC < VTRIP1; holds active until VCC exceeds VTRIP1 + tPURST (200ms default); drives TTL loads. |
| 4: VSS | Ground reference | Primary return path for all internal circuits; must be connected to system ground plane with low-inductance trace. |
| 5: SDA | Bidirectional I²C data line | Open-drain serial data I/O; requires external pull-up; used for EEPROM access, watchdog restart, and VTRIP programming. |
| 6: SCL | I²C clock input | Master-generated clock synchronizing all serial transfers; toggles during watchdog restart and memory read/write. |
| 7: WDO | Open-drain watchdog output | Asserts LOW on watchdog timeout; used to trigger system reset or interrupt; requires external pull-up. |
| 8: VCC | Main supply voltage input | 2.7V–5.5V power source; powers internal logic, comparators, EEPROM, and V2MON circuitry (X40415). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneous monitoring of VCC (V1MON) and secondary rail (V2MON) with separate, field-programmable thresholds. |
| User-reprogrammable VTRIP voltages | VTRIP1 and VTRIP2 thresholds adjusted in-system using WDO pin HV programming - no external programmer required. |
| Nonvolatile control register | PUP1/PUP0, WD1/WD0, and BP bits retain settings across power cycles; modified via three-step I²C write sequence. |
| Block Lock™ EEPROM protection | Selective write-protection of upper 256 bytes (100h–1FFh) or full array lock; prevents accidental firmware/config corruption. |
| Fault Detection Register (FDR) | Volatile 8-bit register (address 0FFh) captures cause of last reset: LV1F, LV2F, or WDF - enabling root-cause diagnostics. |
Applications
| Industrial Process Controller | Network Storage Array |
|---|---|
|
Use Scenario: Monitoring 3.3V main supply and 1.2V FPGA core rail in a PLC controller exposed to voltage transients and thermal cycling. IC Role / Device Role / Timing Role: X40415S8I-C asserts RESET on VCC brownout and V2FAIL on FPGA core undervoltage, while logging fault cause in FDR for post-event analysis. Use Value: Prevents corrupted state machine execution and ensures deterministic recovery - critical for SIL-2 safety-critical loops. |
Use Scenario: Supervising dual-rail power (5V system + 1.5V ASIC) in RAID controller with persistent configuration stored in on-chip EEPROM. IC Role / Device Role / Timing Role: X40415S8I-C provides synchronized power-on reset, detects early 1.5V rail collapse before ASIC initialization, and stores drive mapping tables. Use Value: Eliminates need for discrete supervisors + external EEPROM - reduces BOM count by 3 components and PCB area by >25mm². |
| Communications Router | Intelligent Power Meter |
|
Use Scenario: Ensuring clean boot of ARM-based routing engine after AC line disturbance, with watchdog guarding against software lockup during packet forwarding. IC Role / Device Role / Timing Role: X40415S8I-C generates 200ms POR, monitors 3.3V switch fabric rail, and resets CPU via WDO if firmware fails to service watchdog within 200ms. Use Value: Guarantees router self-recovery without manual intervention - meets carrier-grade 99.999% uptime requirements. |
Use Scenario: Securing meter calibration constants and tariff schedules in AMI (Advanced Metering Infrastructure) devices deployed in unattended outdoor locations. IC Role / Device Role / Timing Role: X40415S8I-C stores encrypted billing parameters in Block Lock™-protected EEPROM pages and validates 3.3V supply during OTA firmware updates. Use Value: Provides tamper-resistant, long-life (100-year) nonvolatile storage immune to power glitches during wireless update windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor with EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816ESE+ | Single-voltage supervisor (5V only); no EEPROM; push-pull RESET; fixed 200ms POR. | Lacks V2MON, EEPROM, and programmability - suitable only for basic 5V reset-only use cases. | Choose only if system requires minimal footprint and no secondary rail monitoring or nonvolatile storage. |
| TPS3808G33DBVR | Dual-voltage supervisor (adjustable thresholds) with no EEPROM; open-drain RESET; 2.93V/3.08V fixed options. | Requires external EEPROM for configuration storage; no watchdog or fault register; lower quiescent current (1.5µA). | Select when ultra-low standby power is critical and external memory is already present in design. |
Compared with MAX6816ESE+ and TPS3808G33DBVR, the X40415S8I-C uniquely integrates EEPROM, dual adjustable voltage monitoring, and watchdog in one SOIC-8 package - eliminating board space and interconnect complexity at the cost of higher standby current (6–25µA).
Availability
X40415S8I-C is available at Aetrix Electronics and suitable for industrial process controllers, network storage arrays, communications routers, and intelligent power meters requiring stable component supply and long-term lifecycle support.
Supply support for X40415S8I-C 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 (now part of Renesas Electronics) is a U.S.-based analog and mixed-signal semiconductor company founded in 1967, specializing in power management, precision analog, and interface solutions.
The X40415S8I-C belongs to Intersil's CPU Supervisor family, designed specifically for embedded systems needing coordinated power sequencing, fault-aware reset generation, and secure nonvolatile parameter storage - targeting industrial, telecom, and energy infrastructure applications.
FAQ
What is the factory-default VTRIP1 and VTRIP2 voltage for X40415S8I-C?
The X40415S8I-C ships with VTRIP1 set to 2.60V (range 2.55–2.65V) and VTRIP2 set to 1.30V (range 1.25–1.35V), per the "-C" variant designation in the selection table. These values are nonvolatile and remain stable over temperature and time unless reprogrammed using the WDO high-voltage sequence specified in the FN8116.0 datasheet.
Does X40415S8I-C support I²C bus speeds above 100kHz?
Yes, the X40415S8I-C supports up to 400kHz I²C operation - confirmed by its "400kHz 2-wire interface" specification and timing diagrams in the FN8116.0 datasheet. It complies with standard-mode and fast-mode I²C electrical requirements, including open-drain SDA/SCL with appropriate pull-up sizing.
How does the watchdog timer in X40415S8I-C get reset?
The X40415S8I-C watchdog timer is reset by a specific I²C sequence: a HIGH-to-LOW transition on SDA while SCL is toggled from HIGH to LOW, followed immediately by a STOP condition. This sequence must occur within the selected timeout period (e.g., 200ms) to prevent WDO assertion - no dedicated watchdog feed pin is required.
Can the EEPROM in X40415S8I-C be written to during normal system operation?
Yes, the 4kbit EEPROM in X40415S8I-C supports in-system writes via its 2-wire interface at any time - provided the Write Enable Latch (WEL) and Register Write Enable Latch (RWEL) are properly set. Page writes complete in 5ms typical; built-in power-up/power-down protection prevents corruption during supply transitions.
Is X40415S8I-C pin-compatible with other members of the X4041x family?
Yes, X40415S8I-C shares identical 8-pin SOIC pinout and electrical interface with X40410, X40411, and X40414 - including SDA, SCL, RESET/RESET, V2FAIL, V2MON, WDO, VSS, and VCC. However, functional differences exist: X40415 uses VCC-powered V2MON (vs. V2MON-powered in X40411) and has distinct VTRIP ranges, requiring schematic review before substitution.
X40415S8I-C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1V, 2.9V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X40415S8I-C FAQ
1.How can I place an order for X40415S8I-C through Aetrix?
Please submit a Request for Quotation (RFQ) for X40415S8I-C 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 X40415S8I-C reliable?
The price and inventory of X40415S8I-C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X40415S8I-C is usually 5 days.
3.What payment methods are accepted for X40415S8I-C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X40415S8I-C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X40415S8I-C?
X40415S8I-C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X40415S8I-C 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 X40415S8I-C?
For technical support, including X40415S8I-C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X40415S8I-C requirements.
6.How does Aetrix verify that X40415S8I-C is sourced from the original manufacturer or authorized distributors?
All X40415S8I-C 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 X40415S8I-C meets industry standards.
7.What is the process for return or replacement of X40415S8I-C?
All X40415S8I-C units undergo pre-shipment inspection (PSI). If there is an issue with X40415S8I-C, 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 X40415S8I-C part is unused and in its original packaging.
Return procedure for X40415S8I-C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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