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Renesas X5043M8I-2.7T2
- Part No.:
- X5043M8I-2.7T2
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
X5043M8I-2.7T2.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,800
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Product details
Overview
X5043M8I-2.7T2 from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset, watchdog timer, supply voltage supervision, and 4Kbit SPI EEPROM in an 8-pin MSOP package. It features 2.93V reset threshold, -40°C to +85°C industrial temperature range, and 3.3MHz SPI interface - used for reliable boot sequencing and data retention in embedded microcontroller systems.
For engineers reviewing the X5043M8I-2.7T2 datasheet, X5043M8I-2.7T2 pinout, X5043M8I-2.7T2 application, or X5043M8I-2.7T2 equivalent, key selection criteria include VTRIP reprogrammability, block-lock EEPROM protection granularity, watchdog timeout configurability, and compatibility with 2.7–5.5V supply rails in space-constrained industrial designs.
Technical Context
The X5043M8I-2.7T2 implements a dual-function CS/WDI pin for both chip select and watchdog input, with reset assertion triggered by either VCC drop below 2.93V (±2.5%) or watchdog timeout (200ms/600ms/1.4s). Its internal status register stores nonvolatile WD0/WD1 and BL0/BL1 bits controlling timeout period and EEPROM block lock level.
It uses Direct Write™ EEPROM cells enabling 1M write cycles and 100-year data retention, supports 16-byte page writes with 5ms typical write cycle time, and includes hardware write protection via WP pin plus software-controlled WREN latch and status register locking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 2.93V ±2.5% - factory-set low-voltage reset point; reprogrammable to custom values using VP=15–18V sequence |
| Supply Range | 2.7V to 5.5V - supports wide-input industrial and battery-backed systems without external regulators |
| Watchdog Timeout | Selectable 200ms / 600ms / 1.4s - configured via nonvolatile WD0/WD1 bits; remains stable across power cycles |
| SPI Clock Rate | 3.3MHz max - enables fast configuration and EEPROM access compatible with standard MCU SPI peripherals |
| EEPROM Endurance | 1,000,000 write cycles - sufficient for frequent calibration or event-logging applications over product lifetime |
| Standby Current | <10µA (WDT off) / <50µA (WDT on) - critical for long-life battery-powered equipment |
| Package | 8-pin MSOP - 3mm × 3mm footprint ideal for compact PCB layouts with thermal performance matching SOIC |
Pinout & Package
8-pin MSOP (3mm × 3mm, 0.65mm pitch), RoHS-compliant, Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS/WDI | Chip Select / Watchdog Input | Active-low enable for SPI interface; falling edge resets watchdog timer; high-to-low transition required after power-up to initiate operation |
| 2 WP | Write Protect Input | Hardware lock: LOW disables all nonvolatile writes (EEPROM and status register), overriding software controls |
| 3 SO | Serial Output | Push-pull output; data shifted out on SCK falling edge; high-impedance when CS high or during internal write |
| 4 VSS | Ground | Reference return path for all analog and digital circuitry; must be low-impedance connection to system GND plane |
| 5 VCC | Supply Voltage | 2.7–5.5V main power rail; powers reset generator, watchdog, EEPROM, and SPI logic; also used as programming reference for VTRIP adjustment |
| 6 SCK | Serial Clock Input | Controls timing of SPI transfers; data latched on rising edge (SI), output changes on falling edge (SO) |
| 7 SI | Serial Input | Accepts opcodes, addresses, and data; all bits transferred MSB-first; latched on rising edge of SCK |
| 8 RESET/RESET | Reset Output | Open-drain active-low output (X5043 variant); asserted for ≥200ms after VCC rises above VTRIP or watchdog timeout; valid down to VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Allows field calibration of reset threshold using 15–18V VP on WP pin - eliminates need for multiple BOM variants |
| Block Lock™ EEPROM Protection | Four protection levels (none / 1/4 / 1/2 / full array) controlled by nonvolatile BL0/BL1 bits - prevents accidental firmware corruption |
| Watchdog Timer with Nonvolatile Settings | Timeout period retained across power cycles via status register - ensures consistent fail-safe behavior without host reinitialization |
| Direct Write™ EEPROM Technology | 1M write endurance and 100-year data retention - suitable for mission-critical parameter storage in unattended systems |
| Dual-Function CS/WDI Pin | Reduces MCU GPIO count by combining chip select and watchdog feed into single pin - simplifies layout and firmware design |
Applications
| Industrial Process Controllers | Network Infrastructure Equipment |
|---|---|
Use Scenario: Monitoring PLC I/O modules during brownout conditions and preserving calibration data across unexpected power loss. IC Role / Device Role / Timing Role: Supervisor IC providing VCC monitoring, power-on reset, and nonvolatile storage for sensor offsets and PID coefficients. Use Value: Prevents erratic actuator behavior during voltage sags and retains critical tuning parameters without external backup power. | Use Scenario: Ensuring reliable boot of switch/router firmware and storing MAC address tables and port configurations. IC Role / Device Role / Timing Role: CPU supervisor generating clean reset pulse and hosting secure, block-protected EEPROM for configuration data. Use Value: Eliminates boot failures due to marginal supply and protects against unauthorized or accidental overwrite of network identity data. |
| Medical Diagnostic Devices | Battery-Powered Data Loggers |
Use Scenario: Maintaining safe shutdown state and preserving diagnostic history in portable ultrasound or ECG units during battery depletion. IC Role / Device Role / Timing Role: Low-power supervisor asserting reset before VCC drops below functional threshold and logging fault events to EEPROM. Use Value: Guarantees deterministic shutdown and preserves clinical data integrity even under rapidly decaying battery voltage. | Use Scenario: Recording environmental sensor readings over months on coin-cell power while surviving repeated deep discharge cycles. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current supervisor with EEPROM for timestamped measurement storage and watchdog recovery. Use Value: Enables >5-year operational life on CR2032 with guaranteed data persistence and automatic recovery from MCU lockup. |
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 |
|---|---|---|---|
| MCP9808-E/P | Temperature sensor with I²C interface only - no reset, watchdog, or EEPROM functions | Provides thermal monitoring but lacks system supervision capabilities | Not functionally equivalent; only suitable if temperature sensing is sole requirement |
| MAX6361KA29+T | Supervisor-only IC (no EEPROM); 2.93V reset, -40°C to +85°C, 8-pin SOIC; no programmable VTRIP or watchdog | Delivers basic reset and power monitoring but requires external memory for configuration storage | Use when EEPROM integration is unnecessary and board space allows separate memory component |
Compared with X5043M8I-2.7T2, MAX6361KA29+T provides identical reset threshold and temperature grade but omits EEPROM and watchdog - increasing BOM count and firmware complexity, whereas MCP9808-E/P serves a completely different sensing function with no supervision capability.
Availability
X5043M8I-2.7T2 is available at Aetrix Electronics and suitable for industrial process controllers, network infrastructure equipment, medical diagnostic devices, and battery-powered data loggers requiring stable component supply across extended product lifecycles.
Supply support for X5043M8I-2.7T2 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 precision analog, power management, and interface solutions for industrial, communications, and computing markets.
The X5043 family was designed to consolidate power supervision, watchdog safety, and nonvolatile storage into a single IC for microcontroller-based systems where reliability, board space, and supply chain simplicity are critical.
FAQ
What is the factory-default VTRIP voltage for the X5043M8I-2.7T2?
The X5043M8I-2.7T2 ships with a factory-programmed VTRIP of 2.93V ±2.5%, corresponding to the "-2.7A" suffix in the ordering code. This threshold is nonvolatile and persists across power cycles unless explicitly reprogrammed using the VP=15–18V sequence on the WP pin.
Does the X5043M8I-2.7T2 support both active-low and active-high reset outputs?
No - the X5043M8I-2.7T2 is the X5043 variant and provides only an active-low open-drain RESET output. The X5045 variant offers active-high RESET; however, X5043M8I-2.7T2 is strictly active-low and requires an external pull-up resistor for proper logic-level signaling.
How is the watchdog timeout period configured on the X5043M8I-2.7T2?
The watchdog timeout on X5043M8I-2.7T2 is set via two nonvolatile bits (WD0 and WD1) in the status register, programmed using the WRSR instruction. Valid combinations yield 200ms, 600ms, or 1.4s timeouts - or disable the watchdog entirely. These settings survive power loss and require no host reinitialization.
Can the X5043M8I-2.7T2's EEPROM be partially protected while leaving other sections writable?
Yes - the X5043M8I-2.7T2 implements Block Lock™ protection controlled by BL0/BL1 bits. It supports four protection modes: none, lower quarter (0x180–0x1FF), lower half (0x100–0x1FF), or full array (0x000–0x1FF), enabling selective write protection without affecting read access to locked regions.
What is the maximum SPI clock frequency supported by the X5043M8I-2.7T2?
The X5043M8I-2.7T2 supports a maximum SPI clock frequency of 3.3MHz across its full 2.7–5.5V supply range and -40°C to +85°C operating temperature. This allows high-speed configuration and EEPROM access while maintaining timing margin per AC specifications in the FN8126 datasheet.
X5043M8I-2.7T2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.62V
- 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-MSOP
X5043M8I-2.7T2 FAQ
1.How can I place an order for X5043M8I-2.7T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043M8I-2.7T2 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 X5043M8I-2.7T2 reliable?
The price and inventory of X5043M8I-2.7T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5043M8I-2.7T2 is usually 5 days.
3.What payment methods are accepted for X5043M8I-2.7T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043M8I-2.7T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043M8I-2.7T2?
X5043M8I-2.7T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043M8I-2.7T2 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 X5043M8I-2.7T2?
For technical support, including X5043M8I-2.7T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043M8I-2.7T2 requirements.
6.How does Aetrix verify that X5043M8I-2.7T2 is sourced from the original manufacturer or authorized distributors?
All X5043M8I-2.7T2 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 X5043M8I-2.7T2 meets industry standards.
7.What is the process for return or replacement of X5043M8I-2.7T2?
All X5043M8I-2.7T2 units undergo pre-shipment inspection (PSI). If there is an issue with X5043M8I-2.7T2, 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 X5043M8I-2.7T2 part is unused and in its original packaging.
Return procedure for X5043M8I-2.7T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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