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Renesas X5043S8Z-2.7T1
- Part No.:
- X5043S8Z-2.7T1
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5043S8Z-2.7T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,839
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Product details
Overview
X5043S8Z-2.7T1 from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset, watchdog timer, supply voltage supervision, and 4K-bit SPI EEPROM in an 8-pin SOIC package. It features a 2.85–3.0V reset threshold, 200ms reset timeout, and operates across 2.7–5.5V VCC with <50µA standby current (watchdog on). It serves as a system-level reliability enhancer in embedded microcontroller applications requiring nonvolatile configuration storage and fail-safe reset control.
For engineers reviewing the X5043S8Z-2.7T1 datasheet, X5043S8Z-2.7T1 pinout, X5043S8Z-2.7T1 application, or X5043S8Z-2.7T1 equivalent, key selection criteria include its factory-default 200ms watchdog timeout (WD1=0, WD0=0), reprogrammable VTRIP capability, block-lock EEPROM protection (1/4, 1/2, full, or none), and compatibility with standard SPI buses up to 3.3MHz - all critical for industrial control, networking, and battery-powered systems where brownout resilience and data integrity are mandatory.
Technical Context
The X5043S8Z-2.7T1 implements a dual-function CS/WDI pin that serves both chip select and watchdog input, with falling-edge-triggered watchdog reset. Its internal power-on reset circuit asserts RESET/RESET for ≥200ms after VCC exceeds 2.85V, and holds it active until VCC remains above trip threshold for the same duration during recovery.
It uses a nonvolatile status register (default 0x30) to configure watchdog timeout (200ms, 600ms, 1.4s, or disabled) and EEPROM block lock (BL0/BL1 bits), while supporting direct VTRIP reprogramming via high-voltage sequence (VP = 15–18V applied to WP) - enabling field-adjustable reset thresholds without hardware changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 2.85–3.0V (factory-set; reprogrammable via VP sequence) |
| Watchdog Timeout | 200ms (default; configurable to 600ms, 1.4s, or disabled) |
| EEPROM Capacity | 4K-bit (512 × 8), organized in 16-byte pages with 1M write cycles endurance |
| SPI Clock Rate | Up to 3.3MHz - supports fast configuration reads/writes without MCU clock dependency |
| Reset Assertion Validity | Valid down to VCC = 1V - ensures reliable reset during deep brownout conditions |
| Standby Current | <50µA max (watchdog enabled), <10µA max (watchdog disabled) |
| Package | 8-pin SOIC (RoHS-compliant, Pb-free plus anneal) |
Pinout & Package
8-pin SOIC (Small Outline Integrated Circuit) package, RoHS-compliant, Pb-free plus anneal finish, MSL level per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select / Watchdog Input | Active-low enable for SPI interface; falling edge resets watchdog timer |
| 2: WP | Write Protect Input | Low disables all nonvolatile writes (EEPROM & status register); overrides WREN latch |
| 3: SO | Serial Output | Push-pull output; data shifted out on SCK falling edge during READ/WRSR |
| 4: VSS | Ground Reference | Primary return path for VCC, logic, and reset circuitry |
| 5: VCC | Supply Voltage | 2.7–5.5V operation; powers reset generator, watchdog, EEPROM, and SPI logic |
| 6: SCK | Serial Clock Input | Controls timing; latches SI on rising edge, updates SO on falling edge |
| 7: SI | Serial Input | Accepts opcodes, addresses, and data; latched on SCK rising edge |
| 8: RESET/RESET | Active-Low Reset Output | Open-drain output asserted when VCC < VTRIP or watchdog times out; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Enables field calibration of reset threshold using 15–18V VP on WP pin - eliminates BOM variants for custom voltage rails |
| Block Lock™ EEPROM Protection | Four programmable protection levels (none, 1/4, 1/2, or full array) prevent accidental overwrites of critical firmware or calibration data |
| Direct Write™ EEPROM Cell | Guarantees ≥1,000,000 write cycles and ≥100 years data retention - suitable for frequent logging or parameter tuning |
| Dual-Function CS/WDI Pin | Reduces MCU GPIO count by combining chip select and watchdog feed into one pin - simplifies PCB routing and firmware design |
| Built-in Write Enable Latch | Requires explicit WREN command before any write; automatically cleared on power-up, write completion, or WP low - prevents spurious writes during noise events |
Applications
| Industrial Process Controllers | Network Routers & Switches |
|---|---|
Use Scenario: Monitoring PLC I/O modules during voltage sags or transient surges in factory automation lines. IC Role / Device Role / Timing Role: Provides brownout reset and watchdog supervision while storing calibration coefficients and fault logs in protected EEPROM. Use Value: Prevents erratic controller behavior during 2.85–3.0V rail instability and retains mission-critical data across 1M+ power cycles. | Use Scenario: Storing boot configuration, MAC address tables, and QoS policies in enterprise-grade Layer 2/3 switches. IC Role / Device Role / Timing Role: Acts as unified reset supervisor and nonvolatile memory - eliminating discrete reset IC + EEPROM combo. Use Value: Reduces board space by 30% vs. discrete solution and enables secure, block-locked storage of sensitive network parameters. |
| Battery-Powered IoT Gateways | Medical Diagnostic Equipment |
Use Scenario: Managing low-power sleep/wake transitions and preserving sensor calibration data during Li-ion battery discharge (2.7–3.6V range). IC Role / Device Role / Timing Role: Monitors VCC decay, triggers controlled shutdown via RESET, and stores last-known sensor offsets in EEPROM before power loss. Use Value: Achieves <10µA standby current with watchdog off - extending battery life while ensuring data persistence across 100-year retention. | Use Scenario: Safeguarding FDA-mandated device configuration, usage logs, and calibration history in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Delivers fail-safe reset during AC/DC adapter switching and stores audit-trail data in tamper-resistant, block-locked EEPROM. Use Value: Meets IEC 62304 Class C software safety requirements via deterministic reset timing and write-protected memory architecture. |
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/SN | Temperature sensor with I²C interface; no reset, watchdog, or EEPROM functions | Not functionally equivalent - lacks core supervisor functionality | Select only if temperature monitoring is primary need and supervisor functions are handled elsewhere |
| MAX6361KA29+T | Supervisor-only IC (no EEPROM); fixed 2.93V reset threshold; 14-pin TSSOP | Requires external EEPROM for configuration storage; higher pin count and board area | Choose when EEPROM integration is unnecessary and strict 2.93V reset accuracy is required |
Compared with X5043S8Z-2.7T1, MAX6361KA29+T offers tighter VTRIP tolerance but adds system complexity via external memory, while MCP9808-E/SN provides no supervisor capability - making X5043S8Z-2.7T1 the only single-chip solution delivering matched 2.85–3.0V reset, programmable watchdog, and 4K-bit block-locked EEPROM in 8-pin SOIC.
Availability
X5043S8Z-2.7T1 is available at Aetrix Electronics and suitable for industrial process controllers, network routers & switches, and battery-powered IoT gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for X5043S8Z-2.7T1 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
Renesas Electronics (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and communications markets.
The X5043 family was designed to consolidate reset supervision, watchdog protection, and nonvolatile memory into a single IC - reducing system cost and improving reliability in resource-constrained embedded applications.
FAQ
What is the factory-default watchdog timeout setting for X5043S8Z-2.7T1?
The X5043S8Z-2.7T1 ships with watchdog timer disabled by default (WD1=1, WD0=1 in status register 0x30). To enable 200ms timeout, the status register must be rewritten to 0x08 using WRSR instruction. This default prevents unintended system resets during initial power-up before firmware configures the watchdog.
Can the VTRIP threshold of X5043S8Z-2.7T1 be adjusted in-circuit?
Yes, the VTRIP threshold of X5043S8Z-2.7T1 can be reprogrammed in-circuit using a 15–18V programming voltage (VP) applied to the WP pin while issuing specific WREN + write sequences to address 01h (set) or 03h (reset). This allows field calibration without replacing the component.
Does X5043S8Z-2.7T1 support SPI Mode 0 (CPOL=0, CPHA=0)?
Yes, X5043S8Z-2.7T1 operates in SPI Mode 0: data is sampled on the rising edge of SCK (CPHA=0) and output changes on the falling edge (CPOL=0). The datasheet confirms SI latching on rising edge and SO toggling on falling edge - matching standard Mode 0 timing.
How does the block lock protection work in X5043S8Z-2.7T1's EEPROM?
X5043S8Z-2.7T1 uses two nonvolatile BL0/BL1 bits in the status register to define protected regions: 00 = none, 01 = upper 1/4 (0x180–0x1FF), 10 = upper 1/2 (0x100–0x1FF), 11 = full array (0x000–0x1FF). Protected blocks remain readable but reject all write attempts unless BL bits are first cleared.
Is X5043S8Z-2.7T1 compatible with 1.8V I/O systems?
No, X5043S8Z-2.7T1 requires VCC ≥2.7V and specifies VIH ≥0.7×VCC and VIL ≤0.3×VCC. At 1.8V VCC, VIH would be ≥1.26V - exceeding typical 1.8V logic HIGH thresholds (1.65–1.95V). It is not rated for 1.8V operation and may exhibit unreliable communication or reset behavior.
X5043S8Z-2.7T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5043S8Z-2.7T1 FAQ
1.How can I place an order for X5043S8Z-2.7T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5043S8Z-2.7T1 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 X5043S8Z-2.7T1 reliable?
The price and inventory of X5043S8Z-2.7T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5043S8Z-2.7T1 is usually 5 days.
3.What payment methods are accepted for X5043S8Z-2.7T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5043S8Z-2.7T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5043S8Z-2.7T1?
X5043S8Z-2.7T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5043S8Z-2.7T1 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 X5043S8Z-2.7T1?
For technical support, including X5043S8Z-2.7T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5043S8Z-2.7T1 requirements.
6.How does Aetrix verify that X5043S8Z-2.7T1 is sourced from the original manufacturer or authorized distributors?
All X5043S8Z-2.7T1 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 X5043S8Z-2.7T1 meets industry standards.
7.What is the process for return or replacement of X5043S8Z-2.7T1?
All X5043S8Z-2.7T1 units undergo pre-shipment inspection (PSI). If there is an issue with X5043S8Z-2.7T1, 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 X5043S8Z-2.7T1 part is unused and in its original packaging.
Return procedure for X5043S8Z-2.7T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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