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Renesas X5045S8IZ-4.5A
- Part No.:
- X5045S8IZ-4.5A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5045S8IZ-4.5A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,790
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Product details
Overview
X5045S8IZ-4.5A from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4Kbit SPI EEPROM in a single 8-lead SOIC package. It features a 4.63V ±2.5% reset threshold, 200ms reset timeout, and supports 3.3MHz SPI communication. It is used in industrial embedded systems requiring reliable brownout protection and nonvolatile configuration storage.
For engineers reviewing the X5045S8IZ-4.5A datasheet, X5045S8IZ-4.5A pinout, X5045S8IZ-4.5A application, or X5045S8IZ-4.5A equivalent, key selection criteria include VTRIP reprogrammability, block-lock EEPROM protection granularity, watchdog timeout configurability (200ms/600ms/1.4s), low standby current (<10µA with WDT off), and compatibility with 4.5–5.5V supply rails.
Technical Context
The X5045S8IZ-4.5A implements a dual-function CS/WDI pin for chip select and watchdog input, with falling-edge-triggered watchdog reset. Its internal voltage monitor asserts RESET/RESET when VCC drops below 4.63V ±2.5%, holding it active until VCC exceeds the trip point for 200ms and stabilizes above 1V.
EEPROM operation uses SPI mode 0 (CPOL=0, CPHA=0) with MSB-first transfer, supporting 16-byte page writes and 100,000 write cycles. The status register contains nonvolatile WD0/WD1 bits for watchdog timeout selection and BL0/BL1 bits for quarter/half/full memory block lock protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 4.63V ±2.5%; precise brownout detection for 5V systems with factory-trimmed accuracy |
| Reset Timeout | 200ms nominal; ensures stable power and oscillator startup before processor release |
| SPI Clock Rate | 3.3MHz max; enables fast configuration read/write without MCU clock dependency |
| EEPROM Endurance | 1,000,000 write cycles; supports frequent calibration or logging in field-deployed equipment |
| Standby Current | <10µA with watchdog disabled; extends battery life in always-on monitoring nodes |
| Watchdog Timeout | Selectable 200ms/600ms/1.4s via status register; configurable fail-safe timing for diverse firmware execution profiles |
| Operating Temp | –40°C to +85°C; qualified for industrial environments including process control and network infrastructure |
Pinout & Package
Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9mm × 4.9mm body, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select / Watchdog Input | Active-low enable for SPI interface; falling edge resets watchdog timer; dual-role pin reduces MCU GPIO count |
| 2: WP | Write Protect Input | Hardware-level EEPROM write disable when pulled low; complements software block lock for robust data integrity |
| 3: SO | Serial Output | Push-pull output; data shifted out on SCK falling edge; no external pull-up required for clean signal integrity |
| 4: VSS | Ground | Reference return path for all analog and digital circuitry; must be low-impedance connection to avoid noise coupling |
| 5: VCC | Supply Voltage | 4.5–5.5V operating range; powers supervisor logic, EEPROM array, and reset driver simultaneously |
| 6: SCK | Serial Clock Input | Controls SPI timing; rising edge latches SI data; falling edge clocks SO data; static clock support allows pause/resume |
| 7: SI | Serial Input | Receives opcodes, addresses, and write data; latched on SCK rising edge; supports full instruction set including WREN/WRSR |
| 8: RESET/RESET | Reset Output | Open-drain active-low output; drives external MCU reset; remains asserted until VCC > VTRIP + 200ms and >1V |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Allows field adjustment of reset threshold using VP = 15–18V on WP pin; eliminates need for BOM changes when fine-tuning brownout behavior |
| Block Lock™ Protection | Four EEPROM protection modes (none/¼/½/all) controlled by nonvolatile BL0/BL1 bits; prevents accidental overwrite of critical calibration or security keys |
| Direct Write™ EEPROM Cell | Guarantees 1M write cycles and 100-year data retention; suitable for long-lifecycle industrial deployments without refresh maintenance |
| Dual-Function CS/WDI Pin | Combines SPI chip select and watchdog trigger on one pin; simplifies PCB routing and reduces MCU pin usage in space-constrained designs |
| Built-in Write Enable Latch | Requires explicit WREN command before any write; prevents spurious writes during power transients or noise events on SI/SCK lines |
Applications
| Industrial Process Controllers | Network Infrastructure Routers |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors in PLC-based automation systems with periodic firmware updates. IC Role / Device Role / Timing Role: CPU supervisor providing brownout reset, watchdog supervision of real-time control loops, and EEPROM storage for sensor calibration coefficients. Use Value: Prevents erratic behavior during line sags; ensures deterministic recovery after power interruption; retains calibrated values across 10+ year deployments. | Use Scenario: Storing boot configuration, MAC address tables, and QoS policies in enterprise-grade Ethernet routers. IC Role / Device Role / Timing Role: Integrated reset generator and nonvolatile memory managing system initialization integrity and runtime parameter persistence. Use Value: Eliminates discrete reset IC + EEPROM bill-of-materials; reduces board area by 40%; guarantees configuration survival during unexpected AC loss. |
| Medical Diagnostic Equipment | Smart Energy Meters |
Use Scenario: Logging diagnostic test results and maintaining user preferences in portable ultrasound or ECG devices with battery backup. IC Role / Device Role / Timing Role: Supervisor ensuring safe shutdown during battery depletion and EEPROM preserving patient history and device settings. Use Value: Meets IEC 62304 safety requirements for reset reliability; provides 100-year data retention for regulatory audit trails. | Use Scenario: Recording tariff schedules, consumption logs, and tamper events in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Voltage monitor triggering secure shutdown before metering inaccuracies occur; EEPROM storing encrypted billing data with block-lock protection. Use Value: Maintains metrological accuracy during grid brownouts; prevents unauthorized modification of revenue-critical parameters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU supervisor with EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816EPA+ | Single-function reset supervisor (no EEPROM); 4.63V threshold; 200ms timeout; 8-pin PDIP only | No integrated memory - requires external EEPROM and additional PCB area | Choose when memory integration is unnecessary and legacy through-hole assembly is required |
| MCP9808-E/P | Temperature sensor with I²C interface; no reset/watchdog/EEPROM functions | Not functionally comparable - serves entirely different sensing role | Not a valid alternative; included only as common mis-selection due to shared "MCP" prefix |
Compared with MAX6816EPA+ and MCP9808-E/P, the X5045S8IZ-4.5A uniquely combines voltage supervision, watchdog, and 4Kbit EEPROM in one SOIC-8 package - reducing component count, layout complexity, and qualification effort for industrial control and networking applications requiring both reliability and persistent storage.
Availability
X5045S8IZ-4.5A is available at Aetrix Electronics and suitable for industrial process controllers, network infrastructure routers, medical diagnostic equipment, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for X5045S8IZ-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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.
The X5045 family was designed to consolidate power management, system supervision, and nonvolatile storage into a single chip - targeting cost-sensitive, space-constrained embedded systems where reliability and long-term data integrity are critical.
FAQ
What is the exact reset threshold voltage for X5045S8IZ-4.5A?
The X5045S8IZ-4.5A has a factory-programmed VTRIP of 4.63V ±2.5%, corresponding to the "-4.5A" suffix. This threshold is guaranteed over temperature and lifetime, and can be reprogrammed to higher values using the VP programming sequence described in the datasheet. The part remains functional down to VCC = 1V during reset assertion.
Does X5045S8IZ-4.5A support both active-low and active-high reset outputs?
No - the X5045S8IZ-4.5A provides only an active-low open-drain RESET output. The "X5045" designation indicates active-low reset; the "X5043" variant offers active-high. Both share identical EEPROM, watchdog, and supervision functionality, but differ solely in reset polarity and part marking.
Can the watchdog timeout of X5045S8IZ-4.5A be changed after soldering?
Yes - the watchdog timeout (200ms, 600ms, 1.4s, or disabled) is controlled by nonvolatile WD0/WD1 bits in the status register and can be modified in-system via SPI commands (WRSR). These bits retain their state across power cycles and do not require VP programming - enabling field-upgradable fail-safe timing.
What is the maximum write endurance of the EEPROM in X5045S8IZ-4.5A?
The EEPROM in X5045S8IZ-4.5A is rated for a minimum of 1,000,000 write cycles and 100 years of data retention, enabled by Intersil's Direct Write™ cell technology. This exceeds standard EEPROM specifications and supports frequent logging or calibration updates in deployed equipment without wear-out concerns.
Is X5045S8IZ-4.5A compatible with 3.3V microcontrollers?
The X5045S8IZ-4.5A operates from 4.5V to 5.5V only and is not 3.3V-compatible. Its VCC range and 4.63V reset threshold are optimized for 5V systems. For 3.3V applications, consider the X5045S8IZ-2.7A variant (2.85–3.0V VTRIP, 2.7–5.5V VCC range), which shares identical pinout and functionality.
X5045S8IZ-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 High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5045S8IZ-4.5A FAQ
1.How can I place an order for X5045S8IZ-4.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for X5045S8IZ-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 X5045S8IZ-4.5A reliable?
The price and inventory of X5045S8IZ-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 X5045S8IZ-4.5A is usually 5 days.
3.What payment methods are accepted for X5045S8IZ-4.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5045S8IZ-4.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5045S8IZ-4.5A?
X5045S8IZ-4.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5045S8IZ-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 X5045S8IZ-4.5A?
For technical support, including X5045S8IZ-4.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5045S8IZ-4.5A requirements.
6.How does Aetrix verify that X5045S8IZ-4.5A is sourced from the original manufacturer or authorized distributors?
All X5045S8IZ-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 X5045S8IZ-4.5A meets industry standards.
7.What is the process for return or replacement of X5045S8IZ-4.5A?
All X5045S8IZ-4.5A units undergo pre-shipment inspection (PSI). If there is an issue with X5045S8IZ-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 X5045S8IZ-4.5A part is unused and in its original packaging.
Return procedure for X5045S8IZ-4.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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