My Inquiry
My Account
Renesas X5043S8I-4.5A
- Part No.:
- X5043S8I-4.5A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5043S8I-4.5A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
X5043S8I-4.5A from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4K-bit SPI EEPROM in an 8-lead SOIC package. It provides active-low RESET output, 4.63V ±2.5% VTRIP threshold, 200ms reset timeout, and operates across –40°C to +85°C for industrial microcontroller systems requiring reliable brownout protection and nonvolatile configuration storage.
For engineers reviewing the X5043S8I-4.5A datasheet, X5043S8I-4.5A pinout, X5043S8I-4.5A application, or X5043S8I-4.5A equivalent, key selection criteria include its programmable VTRIP, block-lock EEPROM protection, 3.3MHz SPI interface, and watchdog timeout configurability via status register bits WD0/WD1.
Technical Context
The X5043S8I-4.5A implements a dual-function CS/WDI pin that serves as both chip select and watchdog input, with falling-edge-triggered watchdog reset. Its internal power-on reset circuit asserts RESET until VCC exceeds 4.63V for 200ms, and maintains reset assertion down to 1V VCC.
Voltage supervision uses a precision comparator with factory-trimmed 4.63V ±2.5% trip point, reprogrammable via high-voltage VP sequence (15–18V on WP). The 4K-bit EEPROM array (512 × 8) supports 16-byte page writes, 1M write endurance, and block lock protection controlled by BL0/BL1 bits in the nonvolatile status register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 4.63V ±2.5%; ensures system reset during 5V rail brownout below safe MCU operating voltage |
| RESET Timeout | 200ms nominal; guarantees stable VCC and oscillator startup before processor execution |
| SPI Clock Rate | 3.3MHz max; enables fast configuration read/write without MCU clock domain constraints |
| EEPROM Endurance | 1,000,000 write cycles; supports frequent calibration data or firmware parameter updates |
| Standby Current (WDT off) | <10µA at 5.5V; minimizes battery drain in always-on industrial monitoring nodes |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s / disabled; prevents runaway code in safety-critical embedded control |
| Operating Temp | –40°C to +85°C; qualified for industrial PLCs, motor drives, and outdoor telecom equipment |
Pinout & Package
Package: 8-lead SOIC (Pb-free), body size 4.9mm × 3.9mm × 1.75mm, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select / Watchdog Input | Active-low enable for SPI; falling edge resets watchdog timer; must toggle within timeout period |
| 2: WP | Write Protect Input | Low disables all nonvolatile writes (EEPROM & status register); overrides WREN latch |
| 3: SO | Serial Output | Push-pull data output; shifts out memory contents on SCK falling edge |
| 4: VSS | Ground | Reference return path for all analog and digital circuits; requires low-impedance PCB connection |
| 5: VCC | Supply Voltage | 4.5–5.5V operation; powers reset comparator, watchdog, EEPROM, and SPI logic |
| 6: SCK | Serial Clock Input | Controls timing of SPI transfers; data latched on rising edge, SO updated on falling edge |
| 7: SI | Serial Input | Accepts opcodes, addresses, and write data; sampled on SCK rising edge |
| 8: RESET | Reset Output (active-low) | Open-drain output; asserted when VCC < 4.63V or watchdog timeout occurs; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Adjustable 4.63V threshold using 15–18V VP on WP pin-enables field calibration for aging power supplies |
| Block Lock™ EEPROM Protection | Configurable 0%, 25%, 50%, or 100% array lock via BL0/BL1 bits-prevents accidental overwrite of critical boot parameters |
| Watchdog Timer with Nonvolatile Settings | WD0/WD1 bits retain timeout selection across power cycles-ensures consistent fail-safe behavior without MCU reinitialization |
| Direct Write™ EEPROM Cell | 1M write endurance and 100-year data retention-supports long-life industrial deployments without memory wear-out concerns |
| Dual-Function CS/WDI Pin | Single pin handles SPI enable and watchdog monitoring-reduces MCU GPIO count and simplifies PCB routing |
Applications
| Industrial Process Controller | Rugged Network Router |
|---|---|
Use Scenario: PLC mainboard monitors analog sensor inputs and controls relay outputs under variable ambient temperature and EMI. IC Role / Device Role / Timing Role: X5043S8I-4.5A provides brownout reset, watchdog supervision of real-time task scheduler, and stores calibrated sensor offsets in protected EEPROM blocks. Use Value: Prevents erratic actuator behavior during 5V rail sag; ensures deterministic recovery after power interruption; preserves calibration integrity across 10+ years of field operation. | Use Scenario: Carrier-grade Ethernet router operates continuously in telco cabinets with thermal cycling and voltage transients. IC Role / Device Role / Timing Role: X5043S8I-4.5A asserts RESET during AC-DC converter undershoot, monitors firmware health via CS/WDI toggling, and retains MAC address and port mapping in EEPROM. Use Value: Eliminates silent hangs from corrupted firmware state; guarantees boot reliability after grid fluctuations; enables zero-touch provisioning via persistent configuration storage. |
| Medical Diagnostic Module | Battery-Powered Data Logger |
Use Scenario: Portable ultrasound subsystem performs time-critical signal processing with strict IEC 62304 safety requirements. IC Role / Device Role / Timing Role: X5043S8I-4.5A delivers fail-safe power-on reset, independent watchdog coverage of DSP firmware, and stores device serial number and calibration coefficients. Use Value: Meets Class C software safety requirements by decoupling reset generation from MCU clock; prevents unsafe operation during undervoltage; secures regulatory-mandated traceability data. | Use Scenario: Environmental sensor node logs temperature/humidity every 10 minutes using coin-cell battery for multi-year deployment. IC Role / Device Role / Timing Role: X5043S8I-4.5A provides ultra-low-power reset supervision (10µA standby), watchdog fallback if sleep timer fails, and stores logging intervals and thresholds in EEPROM. Use Value: Extends battery life beyond 5 years; guarantees data continuity after battery replacement; enables field-adjustable sampling rates without firmware update. |
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; 2K-bit EEPROM; 100k write endurance | Lacks field-adjustable trip point and high-endurance memory-suitable only for cost-sensitive, non-calibration applications | Select when VTRIP stability over lifetime is sufficient and EEPROM write frequency is low |
| STM802LSD-46F | 4.63V reset only; no EEPROM; separate external SPI EEPROM required; 3.3V-only operation | Requires additional components and PCB area; increases BOM count and failure points | Select when EEPROM integration is unnecessary and system already uses discrete SPI flash |
Compared with MAX6361KA29+T and STM802LSD-46F, the X5043S8I-4.5A uniquely combines field-reprogrammable VTRIP, 1M-endurance EEPROM, and industrial temperature range in a single 8-pin SOIC-reducing component count, enabling calibration persistence, and simplifying compliance validation.
Availability
X5043S8I-4.5A is available at Aetrix Electronics and suitable for industrial process controllers, rugged network routers, medical diagnostic modules, and battery-powered data loggers requiring stable component supply across extended lifecycle programs.
Supply support for X5043S8I-4.5A 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) designs high-performance analog and power management ICs for industrial, communications, and computing markets, emphasizing reliability and long-term supply.
The X5043 family targets embedded systems needing integrated power supervision and nonvolatile storage-designed to replace discrete reset ICs + EEPROM combinations while maintaining pin compatibility and simplifying qualification.
FAQ
What is the exact VTRIP voltage and tolerance for X5043S8I-4.5A?
The X5043S8I-4.5A has a factory-programmed VTRIP of 4.63V with ±2.5% tolerance, specified over temperature and voltage. This value is confirmed in the Ordering Information table (Page 3) and Electrical Specifications (Page 16) of FN8126 Rev 3.00. The device supports reprogramming to higher voltages using the VP sequence, but the default shipped setting is 4.63V ±2.5%.
Does X5043S8I-4.5A support active-high RESET output?
No, X5043S8I-4.5A provides only active-low RESET output. The datasheet explicitly lists it under "RESET (ACTIVE LOW)" in the Ordering Information table (Page 3), and the pin description states "RESET/RESET is an active low/HIGH, open drain output" - confirming this variant is active-low only. For active-high reset, the X5045S8I-4.5A variant must be used.
How is the watchdog timeout configured on X5043S8I-4.5A?
The watchdog timeout on X5043S8I-4.5A is set via two nonvolatile bits (WD0 and WD1) in the status register, programmed using the WRSR instruction. Valid settings are: 200ms (WD1=0, WD0=0), 600ms (WD1=0, WD0=1), 1.4s (WD1=1, WD0=0), or disabled (WD1=1, WD0=1, factory default). These values persist across power cycles and do not require MCU reinitialization.
What EEPROM protection modes does X5043S8I-4.5A support?
X5043S8I-4.5A supports four block lock protection levels via BL0/BL1 bits: none (00), upper quarter ($180–$1FF, 01), upper half ($100–$1FF, 10), or full array ($000–$1FF, 11). Protection is enforced at hardware level-write attempts to locked regions are ignored even if WREN is set and WP is high. Status register writes also respect these bits.
Is X5043S8I-4.5A RoHS compliant and what packaging does it use?
Yes, X5043S8I-4.5A is RoHS compliant and supplied in Pb-free plus anneal construction per Intersil's specification: 100% matte tin termination, compatible with SnPb and Pb-free soldering. It uses an 8-lead SOIC package (JEDEC MS-012AC), as confirmed in the Ordering Information table (Page 3) and Pin Configuration diagram (Page 5).
X5043S8I-4.5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5043S8I-4.5A FAQ
1.How can I place an order for X5043S8I-4.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043S8I-4.5A 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 X5043S8I-4.5A reliable?
The price and inventory of X5043S8I-4.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5043S8I-4.5A is usually 5 days.
3.What payment methods are accepted for X5043S8I-4.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043S8I-4.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043S8I-4.5A?
X5043S8I-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043S8I-4.5A 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 X5043S8I-4.5A?
For technical support, including X5043S8I-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043S8I-4.5A requirements.
6.How does Aetrix verify that X5043S8I-4.5A is sourced from the original manufacturer or authorized distributors?
All X5043S8I-4.5A 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 X5043S8I-4.5A meets industry standards.
7.What is the process for return or replacement of X5043S8I-4.5A?
All X5043S8I-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X5043S8I-4.5A, 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 X5043S8I-4.5A part is unused and in its original packaging.
Return procedure for X5043S8I-4.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X5043S8I-4.5A Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
