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Renesas X5323S8IZ-2.7T1
- Part No.:
- X5323S8IZ-2.7T1
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5323S8IZ-2.7T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
X5323S8IZ-2.7T1 from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 32kbit SPI EEPROM in an 8-lead SOIC package. It operates across 2.7V–5.5V supply, features factory-programmable 2.55V–2.7V VTRIP threshold, supports 2MHz SPI interface (modes 0,0 and 1,1), and delivers <1µA standby current with watchdog disabled - enabling reliable microcontroller supervision in industrial embedded systems requiring brown-out protection and nonvolatile configuration storage.
For engineers reviewing the X5323S8IZ-2.7T1 datasheet, X5323S8IZ-2.7T1 pinout, X5323S8IZ-2.7T1 application, or X5323S8IZ-2.7T1 equivalent, this device serves as a single-chip solution for reset management, voltage monitoring, watchdog safety, and EEPROM-based parameter retention in space-constrained, wide-temperature (-40°C to +85°C) designs.
Technical Context
The X5323S8IZ-2.7T1 implements a dual-function CS/WDI pin for chip select and watchdog input, with reset assertion triggered by either VCC falling below its programmable trip point (2.55V–2.7V nominal) or watchdog timeout (200ms/600ms/1.4s selectable via nonvolatile WD0/WD1 bits). Its internal power-on reset circuit activates at ~1V and holds RESET/RESET active for 100–280ms after VCC stabilizes.
It embeds a 32kbit (4k × 8) SPI EEPROM with Block Lock™ protection (0%, 25%, 50%, or 100% array lockable), page-write capability (32-byte pages), and self-timed 10ms typical write cycles. The status register provides volatile WIP/WEL flags and nonvolatile BL0/BL1/WD0/WD1/WPEN bits accessible via RDSR/WRSR instructions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports single-supply operation across wide industrial rail voltages without external regulators. |
| VTRIP Threshold | 2.55V to 2.7V (nominal) - factory-set low-voltage detection point, reprogrammable in-circuit for precision brown-out response. |
| Watchdog Timeout | Selectable 200ms / 600ms / 1.4s - nonvolatile WD0/WD1 bits define fixed timeout; no software polling required. |
| SPI Interface Speed | Up to 2MHz - compatible with standard microcontroller SPI peripherals using modes 0,0 and 1,1 only. |
| EEPROM Capacity | 32kbit (4096 × 8) - sufficient for firmware versioning, calibration data, and system configuration storage. |
| Standby Current | <1µA (WDT off), <20µA (WDT on @ 3.6V) - enables battery-backed operation in low-power supervisory roles. |
| Reset Output Type | Active-low open-drain RESET/RESET - allows wired-OR configuration and flexible pull-up selection. |
Pinout & Package
Package: 8-lead SOIC (Pb-free, RoHS compliant), -40°C to +85°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/WDI | Chip Select Input / Watchdog Input | LOW enables SPI communication; HIGH-to-LOW transition resets watchdog timer - dual-role pin reduces MCU GPIO count. |
| 2: SO | Serial Output | Push-pull output delivering read data MSB-first on SCK falling edge - eliminates need for external pull-up. |
| 3: WP | Write Protect | Hardware lock for status register writes when WPEN bit = 1 - prevents accidental corruption of watchdog or block-lock settings. |
| 4: VSS | Ground | Reference return path for all analog and digital circuits; must be low-impedance connection for stable reset timing. |
| 5: SI | Serial Input | Accepts opcodes, addresses, and data MSB-first on SCK rising edge - supports full SPI command set including WREN, WRSR, READ, WRITE. |
| 6: SCK | Serial Clock | Controls timing of all SPI transfers; rising edge latches input, falling edge clocks output - synchronous interface ensures deterministic timing. |
| 7: RESET/RESET | Reset Output | Open-drain active-low signal asserted during power-up, brown-out, or watchdog timeout - remains active until VCC exceeds VTRIP for 200ms. |
| 8: VCC | Supply Voltage | Primary power input; powers internal reset generator, watchdog, EEPROM, and logic - also used as reference for VTRIP programming. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Voltage threshold adjustable in-system using VP pulses on SCK/SI - enables field calibration without component replacement. |
| Block Lock™ EEPROM Protection | Nonvolatile BL0/BL1 bits allow hardware-level locking of 0%, 25%, 50%, or 100% of memory - prevents unauthorized firmware or config writes. |
| Volatile Reset Source Flag | FLAG bit in status register distinguishes watchdog timeout vs. low-VCC reset - simplifies post-reset diagnostic and recovery logic. |
| Power-Up Reset Valid Down to 1V | RESET/RESET asserts at ~1V and stays active until VCC stabilizes - ensures processor remains held during weak or slow-ramping supplies. |
| In-Circuit Programmable ROM Mode | WP pin + WPEN bit combination disables status register writes - enables secure manufacturing programming followed by permanent lock. |
Applications
| Industrial PLC Control | Medical Diagnostic Device |
|---|---|
Use Scenario: Supervises ARM Cortex-M7 MCU in DIN-rail mounted PLC with 24VDC input converted to 3.3V, storing I/O mapping and calibration coefficients. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brown-out detection at 2.63V, and watchdog timeout at 600ms - ensures deterministic boot and safe fault recovery. Use Value: Eliminates discrete reset IC + separate EEPROM, reducing BOM count by two components while guaranteeing atomic config storage during brown-out events. |
Use Scenario: Manages boot sequence and stores sensor calibration data in portable ultrasound unit powered by Li-ion battery (2.8V–4.2V). IC Role / Device Role / Timing Role: Dual-role supervisor: monitors VCC during battery discharge (trip at 2.55V) and guards against firmware hang via 200ms watchdog - critical for patient safety compliance. Use Value: Enables reliable cold-start from depleted battery and preserves calibrated transducer parameters across 100-year EEPROM retention - meeting IEC 62304 Class C requirements. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Controls microcontroller in door module with 12V battery input (regulated to 5V), retaining window position and mirror settings. IC Role / Device Role / Timing Role: Provides automotive-grade (-40°C to +85°C) reset generation, detects undervoltage during cranking (VTRIP = 2.7V), and stores nonvolatile user preferences in EEPROM. Use Value: Withstands load-dump and cold-crank transients; Block Lock™ prevents accidental overwrites during CAN firmware updates - ensuring ASIL-B functional safety alignment. |
Use Scenario: Supervises metrology SoC in ANSI C12.20-certified electricity meter with backup supercapacitor and tamper-detection circuitry. IC Role / Device Role / Timing Role: Generates precise power-on reset and monitors main supply (5V) for brown-out; stores tariff tables and billing logs in protected EEPROM pages. Use Value: 100,000 write-cycle endurance and 100-year data retention meet ANSI C12.19 archival requirements; reprogrammable VTRIP accommodates aging supply rails. |
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 |
|---|---|---|---|
| MAX6369KA29+T | Fixed 2.93V reset threshold; no VTRIP reprogramming; 16kbit EEPROM; 5-pin SOT23 package | Lacks in-system VTRIP adjustment and full 32kbit capacity - suitable only where threshold tolerance is acceptable and space is ultra-constrained | Select when board area is critical and VTRIP precision is not required; verify compatibility with existing PCB footprint and SPI timing margins. |
| STM6315SW33DX | Fixed 3.08V reset; no EEPROM; push-pull RESET output; 6-pin SOT23 | Requires external EEPROM for configuration storage; higher quiescent current (2.5µA) - increases total system power | Choose only if external EEPROM already exists in design and 3.08V trip point matches system margin; not a functional substitute for integrated memory. |
Compared with MAX6369KA29+T and STM6315SW33DX, X5323S8IZ-2.7T1 uniquely combines field-adjustable reset threshold, 32kbit Block Lock™ EEPROM, and sub-1µA watchdog-off standby - making it the sole option for designs requiring both precision brown-out response and secure, high-endurance nonvolatile storage in one SOIC-8 device.
Availability
X5323S8IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive body electronics, and smart metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for X5323S8IZ-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
Intersil (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.
The X5323 family was designed to consolidate reset supervision, watchdog safety, and nonvolatile memory into a single IC for microcontroller-based systems - targeting cost-sensitive, space-constrained embedded applications demanding high reliability and field configurability.
FAQ
What is the factory-default VTRIP setting for X5323S8IZ-2.7T1?
The X5323S8IZ-2.7T1 ships with a factory-programmed VTRIP threshold of 2.55V to 2.7V (typical 2.63V), optimized for 2.7V–5.5V supply operation. This value is stored in nonvolatile circuitry and remains stable over temperature and time unless explicitly reprogrammed using the VP pulse sequence on SCK and SI pins.
Can X5323S8IZ-2.7T1 operate with a 2.7V supply and still assert RESET/RESET reliably?
Yes - X5323S8IZ-2.7T1 guarantees RESET/RESET assertion down to VCC = 1V and maintains valid reset signaling throughout its 2.7V–5.5V operating range. At 2.7V supply, the device meets all AC/DC specifications including 2MHz SPI timing, <1µA standby current (WDT off), and 200ms power-up reset timeout.
How does the watchdog timer in X5323S8IZ-2.7T1 get enabled or disabled?
The watchdog timer in X5323S8IZ-2.7T1 is controlled by nonvolatile WD0 and WD1 bits in the status register. Factory default is WD1=1, WD0=1 (disabled). To enable, issue WRSR instruction with WD0/WD1 set to 00 (1.4s), 01 (600ms), or 10 (200ms); once programmed, the setting persists through power cycles unless rewritten.
Does X5323S8IZ-2.7T1 support standard SPI mode 0,0 only, or multiple modes?
X5323S8IZ-2.7T1 supports exactly two SPI modes: mode 0,0 (CPOL=0, CPHA=0) and mode 1,1 (CPOL=1, CPHA=1). It does not support mode 0,1 or 1,0. Data is always clocked MSB-first, with SI sampling on SCK rising edge and SO driving on SCK falling edge - matching common microcontroller SPI peripheral configurations.
What is the maximum write endurance and data retention of the EEPROM in X5323S8IZ-2.7T1?
The EEPROM in X5323S8IZ-2.7T1 is rated for a minimum of 100,000 write/erase cycles and guarantees 100 years of data retention at +25°C ambient. These values are specified under standard operating conditions (VCC = 2.7V–5.5V, TA = -40°C to +85°C) and are validated per Intersil's Direct Write™ cell technology.
X5323S8IZ-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:
- 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
X5323S8IZ-2.7T1 FAQ
1.How can I place an order for X5323S8IZ-2.7T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5323S8IZ-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 X5323S8IZ-2.7T1 reliable?
The price and inventory of X5323S8IZ-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 X5323S8IZ-2.7T1 is usually 5 days.
3.What payment methods are accepted for X5323S8IZ-2.7T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5323S8IZ-2.7T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5323S8IZ-2.7T1?
X5323S8IZ-2.7T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5323S8IZ-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 X5323S8IZ-2.7T1?
For technical support, including X5323S8IZ-2.7T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5323S8IZ-2.7T1 requirements.
6.How does Aetrix verify that X5323S8IZ-2.7T1 is sourced from the original manufacturer or authorized distributors?
All X5323S8IZ-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 X5323S8IZ-2.7T1 meets industry standards.
7.What is the process for return or replacement of X5323S8IZ-2.7T1?
All X5323S8IZ-2.7T1 units undergo pre-shipment inspection (PSI). If there is an issue with X5323S8IZ-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 X5323S8IZ-2.7T1 part is unused and in its original packaging.
Return procedure for X5323S8IZ-2.7T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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