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Renesas X5083S8I-2.7
- Part No.:
- X5083S8I-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5083S8I-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:181
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Product details
Overview
X5083S8I-2.7 from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 8Kbit SPI EEPROM in a single 8-lead SOIC package. It asserts active-low RESET down to VCC = 1V, supports selectable watchdog timeout (200ms/600ms/1.4s or disabled), and provides reprogrammable VTRIP threshold of 2.55–2.7V for brownout protection in battery-powered embedded systems.
For engineers reviewing the X5083S8I-2.7 datasheet, X5083S8I-2.7 pinout, X5083S8I-2.7 application, or X5083S8I-2.7 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in industrial instrumentation and network equipment, and two validated alternative parts with documented functional differences.
Technical Context
The X5083S8I-2.7 implements a dual-function CS/WDI pin that serves as both chip select and watchdog input-toggling it LOW resets the watchdog timer. Its internal POR circuit activates RESET at VCC ≈ 1V and holds it active for ≥200ms after VCC exceeds the 2.55–2.7V trip point.
Watchdog timeout is set nonvolatilely via WD0/WD1 bits in the status register and remains unchanged across power cycles. The integrated 8Kbit EEPROM uses Block Lock™ protection, supports SPI modes 0,0 and 1,1, and features 16-byte page writes with 5ms typical write cycle time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports single-supply operation in 3.3V and 5V systems without level shifting |
| VTRIP Threshold | 2.55V to 2.7V - factory-set brownout detection window optimized for 2.7V nominal rail monitoring |
| Watchdog Timeout | 200ms / 600ms / 1.4s or disabled - user-selectable via nonvolatile status register bits WD1/WD0 |
| SPI Clock Rate | Up to 3.3MHz - enables fast configuration and data access compatible with standard microcontroller SPI peripherals |
| EEPROM Endurance | 100,000 write cycles - ensures long-term reliability for parameter storage in field-deployed equipment |
| Standby Current (WDT ON) | ≤20µA at VCC = 3.6V - minimizes quiescent power in always-on battery-backed applications |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and flexible pull-up voltage selection |
Pinout & Package
Package: 8-lead SOIC (RoHS-compliant, M8.15E footprint), operating temperature range −40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOIC) | CS/WDI | Chip select input (active LOW); also watchdog input - falling edge restarts timer; no activity within timeout asserts RESET |
| 2 (SOIC) | SO | Serial output - push-pull, MSB-first data stream synchronized to SCK falling edge during read operations |
| 3 (SOIC) | WP | Write protect - LOW disables all nonvolatile writes to EEPROM; HIGH enables normal operation when WEL is set |
| 4 (SOIC) | VSS | Ground reference - common return path for all internal circuits and I/O pins |
| 5 (SOIC) | VCC | Supply voltage input - powers all internal blocks including supervisor logic and EEPROM array |
| 6 (SOIC) | SI | Serial input - latches opcode, address, and data on SCK rising edge; MSB-first protocol |
| 7 (SOIC) | SCK | Serial clock - controls timing of all SPI transactions; rising edge samples SI, falling edge outputs SO |
| 8 (SOIC) | RESET | Reset output - active-low open-drain signal asserted during power-up, brownout (VCC < VTRIP), or watchdog timeout |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Voltage threshold can be adjusted in-circuit using VP = 15–18V on WP pin and specific WREN/write sequences - enables precision calibration without component replacement |
| Block Lock™ EEPROM Protection | Seven lock configurations (e.g., lower quadrant Q1, upper page Pn, lower half H1) prevent accidental overwrite of critical firmware or calibration data |
| Low-Power Watchdog Operation | Consumes ≤20µA standby current with watchdog enabled at 3.6V - extends battery life in portable instrumentation and remote sensors |
| Robust SPI Interface | Supports both SPI mode 0,0 and 1,1 - interoperates with diverse microcontrollers including ARM Cortex-M, PIC, and MSP430 families |
| Built-in Write Protection | Combines hardware (WP pin) and software (WREN latch) safeguards - prevents spurious writes during noise events or power transients |
Applications
| Industrial Process Control | Network Infrastructure |
|---|---|
Use Scenario: Monitoring sensor nodes in PLC-based automation where supply voltage may dip during motor startup or EMI events. IC Role / Device Role / Timing Role: Voltage supervisor and watchdog - detects brownout, asserts RESET to halt unsafe execution, and logs fault codes to EEPROM before shutdown. Use Value: Prevents corrupted state transitions by ensuring MCU only runs above 2.55V and recovers cleanly after transient dips. |
Use Scenario: Embedded management in Ethernet switches requiring persistent MAC address storage and fail-safe boot sequencing. IC Role / Device Role / Timing Role: SPI EEPROM + supervisor - stores switch configuration and provides power-on reset with 200ms watchdog timeout for firmware validation. Use Value: Eliminates external reset IC and memory, reducing BOM count while guaranteeing reliable boot under variable 3.3V rail conditions. |
| Battery-Powered Medical Devices | Set-Top Box Firmware Management |
Use Scenario: Portable glucose meters powered by coin-cell batteries where VCC decays gradually during discharge. IC Role / Device Role / Timing Role: Low-voltage supervisor - triggers early RESET at 2.55V to preserve EEPROM integrity and prevent erroneous readings. Use Value: Enables graceful shutdown and data save before battery reaches critical level, meeting IEC 62304 safety requirements. |
Use Scenario: Consumer STB platforms needing secure, tamper-resistant storage of channel lineup and parental control settings. IC Role / Device Role / Timing Role: Block-locked EEPROM - protects configuration pages from accidental overwrites during OTA updates. Use Value: Ensures user preferences survive firmware upgrades and power loss, improving end-user experience and reducing support calls. |
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 |
|---|---|---|---|
| MAX6361KA27+T | Fixed 2.63V reset threshold; no VTRIP reprogramming; 1Kbit EEPROM; no block lock | Lacks field-adjustable trip point and robust memory protection - suitable only for cost-sensitive, static-voltage designs | Choose when precise brownout tuning and EEPROM security are not required, and board space is constrained |
| STM802LSD-27F | 2.63V fixed threshold; no EEPROM; push-pull RESET; 1.2µA max standby current | Requires external memory for configuration storage; simpler reset behavior but lower power | Select when EEPROM integration is unnecessary and ultra-low standby current (<2µA) is prioritized over memory functionality |
Compared with MAX6361KA27+T and STM802LSD-27F, the X5083S8I-2.7 uniquely combines field-programmable VTRIP, Block Lock™ EEPROM, and multi-timeout watchdog in one SOIC package - delivering higher system-level integration and field adaptability for industrial and telecom applications.
Availability
X5083S8I-2.7 is available at Aetrix Electronics and suitable for industrial process control, network infrastructure, and battery-powered medical devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for X5083S8I-2.7 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 Corporation is a leading provider of precision analog and power management solutions, acquired by Renesas Electronics in 2017 and now part of its Analog Power Business Unit.
The X5083S8I-2.7 belongs to Intersil's CPU Supervisor family, designed specifically for embedded systems requiring coordinated power monitoring, watchdog safety, and nonvolatile configuration storage in minimal footprint.
FAQ
What is the factory-set VTRIP range for X5083S8I-2.7?
The X5083S8I-2.7 ships with a factory-programmed VTRIP range of 2.55V to 2.7V, corresponding to the "-2.7" suffix per the Ordering Information table on page 3 of FN8127 Rev 4.00. This window is calibrated for reliable operation on 2.7V nominal rails and remains stable over temperature and time unless reprogrammed using the VP-based sequence.
Does X5083S8I-2.7 support SPI mode 0,1 or 1,0?
No, the X5083S8I-2.7 explicitly supports only SPI modes 0,0 (CPOL = 0, CPHA = 0) and 1,1 (CPOL = 1, CPHA = 1), as stated in the Features section on page 1 of FN8127 Rev 4.00. Attempting mode 0,1 or 1,0 will result in incorrect data sampling or communication failure due to mismatched clock polarity and phase timing.
How is the watchdog timeout configured on X5083S8I-2.7?
The watchdog timeout on X5083S8I-2.7 is set via nonvolatile WD0 and WD1 bits in the status register, programmed using the WRSR instruction. Valid combinations yield 200ms (WD1=1, WD0=0), 600ms (WD1=0, WD0=1), 1.4s (WD1=0, WD0=0), or disabled (WD1=1, WD0=1 - factory default). Settings persist across power cycles.
Can X5083S8I-2.7 operate with VCC below 2.7V?
Yes - the X5083S8I-2.7 guarantees full functionality down to VCC = 1V, including RESET assertion, SPI communication, and EEPROM read/write. However, the 2.55–2.7V VTRIP window is only valid above ~2.0V; below that, RESET remains active until VCC rises above VRVALID = 1V and stabilizes for tPURST ≥200ms.
What is the maximum write endurance of the EEPROM in X5083S8I-2.7?
The EEPROM in X5083S8I-2.7 is rated for a minimum of 100,000 write cycles and 100 years of data retention, as specified in the "SPI Serial Memory" section on page 7 of FN8127 Rev 4.00. This endurance applies to both byte and page writes and is guaranteed across the full −40°C to +85°C operating temperature range.
X5083S8I-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
X5083S8I-2.7 FAQ
1.How can I place an order for X5083S8I-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5083S8I-2.7 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 X5083S8I-2.7 reliable?
The price and inventory of X5083S8I-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5083S8I-2.7 is usually 5 days.
3.What payment methods are accepted for X5083S8I-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5083S8I-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5083S8I-2.7?
X5083S8I-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5083S8I-2.7 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 X5083S8I-2.7?
For technical support, including X5083S8I-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5083S8I-2.7 requirements.
6.How does Aetrix verify that X5083S8I-2.7 is sourced from the original manufacturer or authorized distributors?
All X5083S8I-2.7 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 X5083S8I-2.7 meets industry standards.
7.What is the process for return or replacement of X5083S8I-2.7?
All X5083S8I-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X5083S8I-2.7, 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 X5083S8I-2.7 part is unused and in its original packaging.
Return procedure for X5083S8I-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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