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Renesas X5325S8I-2.7
- Part No.:
- X5325S8I-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5325S8I-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,682
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Product details
Overview
X5325S8I-2.7 from Intersil is a CPU supervisor IC with integrated 32kbit SPI EEPROM, combining power-on reset control, watchdog timer, supply voltage supervision, and block-lock protected memory in a single 8-lead SOIC package. It operates from 2.7V to 5.5V, features a factory-programmed 2.55V–2.7V reset threshold, supports 2MHz SPI (modes 0,0 and 1,1), and delivers <1µA standby current with watchdog disabled - used in industrial microcontroller systems requiring reliable brown-out protection and nonvolatile configuration storage.
For engineers reviewing the X5325S8I-2.7 datasheet, X5325S8I-2.7 pinout, X5325S8I-2.7 application, or X5325S8I-2.7 equivalent, this page provides verified technical context, exact pin functions, confirmed reset timing (200ms tPURST), validated VTRIP range (2.55–2.7V), and two documented alternative parts for industrial-grade CPU supervision with EEPROM.
Technical Context
The X5325S8I-2.7 implements a dual-function CS/WDI pin that serves as both chip select and watchdog input: a HIGH-to-LOW transition resets the watchdog timer, while sustained HIGH or LOW beyond the timeout asserts RESET. Its reset logic activates at VCC ≥ 1V and holds RESET/RESET active until VCC exceeds the programmed trip point for 200ms (tPURST).
Internally, it integrates a 32kbit (4k × 8) EEPROM array with Block Lock™ protection (configurable 0%, 25%, 50%, or 100% lock), Direct Write™ memory cells (100k write cycles, 100-year retention), and a volatile status register with WIP/WEL/BL/WD bits accessible via SPI opcodes (READ, WRITE, WRSR, RDSR). The watchdog timeout is set by nonvolatile WD0/WD1 bits (200ms/600ms/1.4s or disabled).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports wide-input industrial power rails without external regulators. |
| VTRIP Threshold | 2.55V to 2.7V (typ. 2.63V) - factory-set low-voltage detection point for brown-out reset. |
| Reset Pulse Width | 200ms (tPURST, typ.) - ensures stable power and oscillator startup before processor release. |
| SPI Speed | 2MHz max - compatible with standard microcontroller SPI peripherals without clock division. |
| EEPROM Size | 32kbit (4096 × 8) - sufficient for firmware versioning, calibration data, and device configuration storage. |
| Standby Current | <1µA (WDT off, VCC = 5.5V) - enables ultra-low-power operation in battery-backed systems. |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s or disabled - configurable via nonvolatile WD0/WD1 bits. |
Pinout & Package
Package: 8-lead SOIC (Pb-free, RoHS compliant), body size 3.9mm × 4.9mm, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select / Watchdog Input | Active-Low enable for SPI; HIGH-to-LOW transition resets watchdog timer; no response if held static beyond timeout. |
| 2: SO | Serial Output | Push-pull data output; shifts MSB-first on falling SCK edge; high-impedance when CS HIGH. |
| 3: WP | Write Protect | Hardware lock for status register writes when WPEN bit = 1; enables in-circuit programmable ROM mode. |
| 4: VSS | Ground | Reference return path for all internal circuits and I/O pins. |
| 5: VCC | Supply Voltage | Primary power input (2.7–5.5V); powers reset circuitry down to 1V; supplies EEPROM and logic. |
| 6: SI | Serial Input | Data/address/instruction input; latched on rising SCK edge; MSB-first protocol. |
| 7: SCK | Serial Clock | Master-generated clock; rising edge latches SI, falling edge drives SO; 0–2MHz operation. |
| 8: RESET/RESET | Reset Output | Active-HIGH open-drain output; asserted when VCC < VTRIP or watchdog timeout occurs; valid to VCC = 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Voltage threshold adjustable via VP programming sequence - enables field tuning for precision brown-out detection. |
| Block Lock™ EEPROM Protection | Nonvolatile BL0/BL1 bits allow hardware-level locking of 0%, 25%, 50%, or 100% of 32kbit array - prevents accidental overwrites. |
| Volatile Reset Source Flag | Flag bit (set/reset via SFLB/RFLB) distinguishes watchdog vs. low-VCC reset - enables targeted system recovery logic. |
| Self-Timed Page Writes | 32-byte page write mode with 5ms typical cycle time - reduces EEPROM programming overhead vs. byte-by-byte writes. |
| Power-Up Reset Validity | RESET/RESET asserted down to VCC = 1V - guarantees early power-rail monitoring before oscillator stabilization. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Microcontroller-based PLC unit operating in unregulated 3.3V rail environments with risk of brown-out during motor switching transients. IC Role / Device Role / Timing Role: CPU supervisor asserting RESET/RESET during VCC dips below 2.63V and providing nonvolatile storage for I/O configuration and fault logs. Use Value: Prevents erratic logic execution during undervoltage events and retains critical operational history across power cycles. |
Use Scenario: Battery-powered infusion pump requiring fail-safe restart after low-battery shutdown and persistent dose calibration data. IC Role / Device Role / Timing Role: Active-HIGH reset generator with EEPROM storing calibrated flow rates and user settings; watchdog monitors main MCU task scheduler. Use Value: Ensures deterministic reinitialization post-brownout and preserves life-critical calibration parameters without external backup power. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: ANSI C12.20-compliant meter exposed to wide temperature (-40°C to +85°C) and line-voltage sags. IC Role / Device Role / Timing Role: Supervisor monitoring 3.3V auxiliary rail; stores tariff tables and tamper-event timestamps in Block Lock™-protected EEPROM. Use Value: Guarantees meter integrity during grid disturbances and secures regulatory data against corruption or overwrite. |
Use Scenario: BCM managing door locks, lighting, and window controls powered from vehicle battery (9–16V) with LDO-regulated 3.3V domain. IC Role / Device Role / Timing Role: Resets MCU during cold-crank voltage drops (<2.7V); stores last-known actuator positions and error codes in EEPROM. Use Value: Maintains functional safety during engine start and enables rapid state restoration after ignition cycling. |
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 |
|---|---|---|---|
| MAX6361KA29+T | Fixed 2.93V reset threshold; no VTRIP reprogramming; 16kbit EEPROM; 1.8–5.5V VCC range. | Lacks field-adjustable VTRIP and smaller EEPROM - suitable where precise 2.93V trip is required and config storage needs are modest. | Choose when design requires guaranteed 2.93V trip without calibration effort and 16kbit EEPROM suffices. |
| STM809SWX6F | 2.93V fixed reset; no EEPROM; push-pull RESET output; 1.2–5.5V VCC; includes manual reset input. | Provides only reset supervision - requires separate EEPROM for configuration storage; lower quiescent current (0.5µA). | Choose when EEPROM integration is unnecessary and lowest possible standby current is prioritized over memory consolidation. |
Compared with X5325S8I-2.7, MAX6361KA29+T offers tighter VTRIP accuracy but lacks reprogrammability and half the EEPROM capacity, while STM809SWX6F reduces BOM count only if external EEPROM is already present and 2.93V reset suffices.
Availability
X5325S8I-2.7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, smart energy meters, and automotive body control modules requiring stable component supply with long-term lifecycle support.
Supply support for X5325S8I-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 (now part of Renesas Electronics) designs high-reliability analog and mixed-signal ICs for industrial, aerospace, and communications infrastructure.
The X5325 product line delivers integrated CPU supervision with EEPROM for embedded systems needing deterministic reset behavior, watchdog safety, and secure nonvolatile storage - targeting applications where board space and BOM count reduction are critical.
FAQ
What is the factory-default VTRIP setting for X5325S8I-2.7?
The X5325S8I-2.7 ships with a factory-programmed VTRIP range of 2.55V to 2.7V (typical 2.63V), corresponding to the "-2.7" suffix per the ordering table. This threshold is nonvolatile and remains stable across temperature and time unless explicitly reprogrammed using the VP-based VTRIP adjustment sequence defined in the datasheet.
Does X5325S8I-2.7 support both active-high and active-low reset outputs?
No - X5325S8I-2.7 provides an active-HIGH RESET/RESET output only, as indicated by the "X5325" prefix (X5323 is active-low). The output is open-drain, requiring an external pull-up resistor, and asserts when VCC falls below VTRIP or the watchdog times out. It remains valid down to VCC = 1V.
How is the watchdog timer enabled and configured on X5325S8I-2.7?
The watchdog timer on X5325S8I-2.7 is enabled by programming the nonvolatile WD0 and WD1 bits in the status register via the WRSR instruction. Factory default is disabled (WD1=1, WD0=1). Timeouts are fixed at 200ms (WD1=1, WD0=0), 600ms (WD1=0, WD0=1), or 1.4s (WD1=0, WD0=0); no runtime adjustment is possible after programming.
Can the EEPROM in X5325S8I-2.7 be written to during normal operation without disrupting the supervisor functions?
Yes - the 32kbit SPI EEPROM in X5325S8I-2.7 operates independently of reset/watchdog circuitry. Writes require WREN followed by WRITE opcode and address/data; the WIP bit indicates busy status. Supervisor functions (reset assertion, watchdog monitoring) continue uninterrupted during EEPROM access, provided CS timing and voltage conditions remain valid.
What package and temperature grade does X5325S8I-2.7 use?
X5325S8I-2.7 uses an 8-lead SOIC package (Pb-free, RoHS compliant) and is rated for the industrial temperature range of -40°C to +85°C, as confirmed by the "I" suffix in the part number and the ordering information table specifying -40°C to +85°C for X5325S8IZ variants.
X5325S8I-2.7 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:
- 2.63V
- 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
X5325S8I-2.7 FAQ
1.How can I place an order for X5325S8I-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5325S8I-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 X5325S8I-2.7 reliable?
The price and inventory of X5325S8I-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 X5325S8I-2.7 is usually 5 days.
3.What payment methods are accepted for X5325S8I-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5325S8I-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5325S8I-2.7?
X5325S8I-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5325S8I-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 X5325S8I-2.7?
For technical support, including X5325S8I-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5325S8I-2.7 requirements.
6.How does Aetrix verify that X5325S8I-2.7 is sourced from the original manufacturer or authorized distributors?
All X5325S8I-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 X5325S8I-2.7 meets industry standards.
7.What is the process for return or replacement of X5325S8I-2.7?
All X5325S8I-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X5325S8I-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 X5325S8I-2.7 part is unused and in its original packaging.
Return procedure for X5325S8I-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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