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Renesas X5043PI
- Part No.:
- X5043PI
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X5043PI.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,418
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Product details
Overview
X5043PI from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset, watchdog timer, supply voltage supervision, and 4Kbit SPI EEPROM in a single 8-lead PDIP package. It provides active-low RESET output, 4.5–5.5V operating range, 4.63V ±2.5% VTRIP threshold, and -40°C to +85°C industrial temperature grade - used for reliable microcontroller boot sequencing and data retention in embedded control systems.
For engineers reviewing the X5043PI datasheet, X5043PI pinout, X5043PI application, or X5043PI equivalent, this page delivers verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options - all grounded in FN8126 Rev 3.00 and official ordering information for X5043PIZ-4.5A.
Technical Context
The X5043PI implements a dual-function reset architecture: power-on reset with 200ms nominal timeout and low-VCC detection that asserts RESET until VCC exceeds 4.63V for 200ms and stabilizes. Its watchdog timer uses CS/WDI as input and supports four selectable timeouts (200ms, 600ms, 1.4s, disabled) via nonvolatile WD0/WD1 bits in the status register.
It integrates a 512 × 8-bit SPI EEPROM with block lock protection (BL0/BL1), 3.3MHz max clock rate, 16-byte page write mode, and Direct Write™ technology enabling 1M write cycles and 100-year data retention. All memory and supervisor functions share a unified SPI interface with WREN/WRDI latching and WP pin hardware write disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 4.63V ±2.5% - sets precise brownout detection point; reprogrammable via VP-based sequence |
| Operating Voltage | 4.5–5.5V - supports standard 5V logic rails with margin for ripple and drop |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s / disabled - configured nonvolatily; survives power cycles |
| EEPROM Capacity | 4Kbit (512 × 8) - sufficient for firmware versioning, calibration data, and configuration storage |
| SPI Clock Rate | Up to 3.3MHz - enables fast parameter reads/writes without CPU overhead |
| Standby Current | <10µA (WDT off) / <50µA (WDT on) - critical for battery-backed or low-power wake-up designs |
| Reset Output Type | Active-low open-drain - allows wired-OR with other reset sources and flexible pull-up selection |
Pinout & Package
Package: 8-lead PDIP (Plastic Dual In-line Package), Pb-free, RoHS-compliant, -40°C to +85°C industrial temperature grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select Input / Watchdog Input | Enables device when low; toggling resets watchdog timer - dual-role pin requires careful timing coordination |
| 2: WP | Write Protect Input | Hardware lock: LOW disables all nonvolatile writes (EEPROM & status register), overriding software enable |
| 3: SO | Serial Output | Push-pull output; data shifted out on SCK falling edge - eliminates need for external pull-up on read path |
| 4: VSS | Ground Reference | Primary return path for all internal circuits; must be low-impedance connection to avoid noise-induced reset glitches |
| 5: VCC | Supply Voltage | 4.5–5.5V input powering both supervisor logic and EEPROM array; also used as reference during VTRIP programming |
| 6: SCK | Serial Clock Input | Controls SPI timing; data latched on rising edge (SI), output changes on falling edge (SO) |
| 7: SI | Serial Input | Receives opcodes, addresses, and write data; latched on SCK rising edge - defines command boundary |
| 8: RESET | Reset Output | Active-low open-drain signal asserted during power-up, brownout, or watchdog timeout - drives external µC reset input |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Threshold adjustable to custom voltage (e.g., 4.6V) using 15–18V VP on WP pin - enables precision brownout tuning without component change |
| Block Lock Protection | Configurable 1/4, 1/2, full, or no EEPROM protection via BL0/BL1 bits - prevents accidental overwrite of critical calibration or security data |
| Direct Write™ EEPROM | 1 million write cycles and 100-year data retention - eliminates wear-leveling firmware overhead in long-life industrial deployments |
| Integrated Watchdog Reset | CS/WDI-triggered timeout with nonvolatile timeout selection - ensures system recovery even after firmware hangs or flash corruption |
| Dual Write Enable Security | Requires both WREN instruction AND WP = HIGH to initiate writes - prevents spurious writes from noise or glitched CS transitions |
Applications
| Industrial Process Controller | Network Router Boot Management |
|---|---|
|
Use Scenario: PLC maintains calibrated sensor offsets and PID coefficients across power cycles in factory automation. IC Role / Device Role / Timing Role: X5043PI supervises µC startup, monitors 5V rail for brownouts, and stores calibration data in protected EEPROM blocks. Use Value: Block lock prevents field-service overwrites; 100-year retention ensures data integrity over equipment lifetime without backup batteries. |
Use Scenario: Enterprise router loads firmware image and applies configuration settings at boot; must survive power interruptions during update. IC Role / Device Role / Timing Role: X5043PI holds reset until 5V rail stabilizes, triggers watchdog if bootloader hangs, and stores MAC address and VLAN config in EEPROM. Use Value: Active-low open-drain RESET interfaces directly with router SoC reset pin; 3.3MHz SPI enables fast config reload without delaying boot time. |
| Medical Diagnostic Instrument | Smart Energy Meter |
|
Use Scenario: Portable ultrasound device logs usage hours and calibration history for regulatory compliance and service scheduling. IC Role / Device Role / Timing Role: X5043PI provides fail-safe reset during battery-to-adapter switchover and stores audit trail in tamper-resistant EEPROM. Use Value: VTRIP reprogramming allows exact match to medical-grade 5V supply tolerance; WP pin physically disables writes during field servicing. |
Use Scenario: ANSI C12.22-compliant meter records kWh consumption and tariff schedules, requiring secure, long-term nonvolatile storage. IC Role / Device Role / Timing Role: X5043PI monitors AC-DC converter output, asserts RESET during grid sags, and retains billing data in block-locked EEPROM sectors. Use Value: 4.63V VTRIP aligns with ANSI C12.1 voltage sag thresholds; <10µA standby current extends supercapacitor hold-up time during outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU supervisor with integrated EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361KA29+T | Fixed 2.93V reset threshold; no VTRIP reprogramming; 1K EEPROM (128×8); 1MHz SPI max | Lacks precision brownout tuning and high-speed SPI - suitable only for cost-sensitive, fixed-threshold designs | Choose when VTRIP adjustment is unnecessary and 4K EEPROM capacity is not required |
| MCP9800T-E/MS | Temperature sensor + 2K I²C EEPROM; no reset or watchdog functions; 2.7–5.5V operation | Provides thermal monitoring but omits core supervisor functionality - requires external reset IC | Choose only if temperature sensing dominates requirements and supervisor functions are handled separately |
Compared with MAX6361KA29+T and MCP9800T-E/MS, the X5043PI uniquely combines field-programmable VTRIP, 4K SPI EEPROM, and configurable watchdog in one industrial-grade PDIP package - eliminating BOM count and layout complexity where brownout precision and data integrity are mandatory.
Availability
X5043PI is available at Aetrix Electronics and suitable for industrial process controllers, network infrastructure equipment, medical diagnostic instruments, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for X5043PI 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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and power management ICs for industrial, communications, and computing markets.
The X5043PI belongs to Intersil's CPU Supervisor family, designed to consolidate reset, watchdog, voltage monitoring, and nonvolatile storage into a single chip - reducing board space and improving system reliability in resource-constrained embedded applications.
FAQ
What is the exact VTRIP voltage for X5043PI and can it be modified?
The X5043PI is shipped with a factory-set VTRIP of 4.63V ±2.5%, corresponding to the "-4.5A" suffix. This threshold is reprogrammable to custom values (e.g., 4.60V) using a 15–18V programming voltage applied to the WP pin and a defined SPI sequence per FN8126 Rev 3.00 Section 6. The procedure writes to internal fuses and survives power cycles.
Does X5043PI support both active-low and active-high reset outputs?
No - the X5043PI provides only an active-low open-drain RESET output. The datasheet distinguishes X5043 (active-low) from X5045 (active-high); X5043PI is explicitly the active-low variant. Its RESET pin must be pulled up externally to VCC or another logic rail to generate a valid reset signal for the host microcontroller.
How does the watchdog timer in X5043PI get reset, and what are the timeout options?
The X5043PI watchdog timer is reset by a HIGH-to-LOW transition on the CS/WDI pin before timeout expiration. Timeout duration is set nonvolatily via WD0/WD1 bits in the status register: 200ms, 600ms, 1.4s, or disabled (factory default). These settings persist across power cycles and require no reinitialization after boot.
What EEPROM protection mechanisms does X5043PI offer beyond software write enable?
X5043PI implements three independent EEPROM protections: (1) Software WREN latch required before any write, (2) Hardware WP pin - LOW disables all writes regardless of WREN state, and (3) Block Lock bits (BL0/BL1) that permanently protect 0%, 25%, 50%, or 100% of the 512-byte array from writes until reconfigured - preventing accidental or malicious corruption of critical data.
Is X5043PI pin-compatible with other members of the X5043/X5045 family?
Yes - all X5043 and X5045 variants in the same package (e.g., 8-lead PDIP, SOIC, MSOP) share identical pinouts and SPI command structure. X5043PI is functionally and physically compatible with X5043PZ-4.5A and X5043S8IZ-4.5A, differing only in temperature grade (-40°C to +85°C vs. 0°C to +70°C) and packaging form factor.
X5043PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
X5043PI FAQ
1.How can I place an order for X5043PI through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043PI 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 X5043PI reliable?
The price and inventory of X5043PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5043PI is usually 5 days.
3.What payment methods are accepted for X5043PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043PI?
X5043PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043PI 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 X5043PI?
For technical support, including X5043PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043PI requirements.
6.How does Aetrix verify that X5043PI is sourced from the original manufacturer or authorized distributors?
All X5043PI 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 X5043PI meets industry standards.
7.What is the process for return or replacement of X5043PI?
All X5043PI units undergo pre-shipment inspection (PSI). If there is an issue with X5043PI, 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 X5043PI part is unused and in its original packaging.
Return procedure for X5043PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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