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Renesas X5323P
- Part No.:
- X5323P
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X5323P.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,542
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Product details
Overview
X5323P from Intersil is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 32kbit SPI EEPROM in a single 8-lead PDIP package. It provides active-low reset assertion at VCC < 4.5V (typ. 4.63V), selectable watchdog timeout (200ms/600ms/1.4s), and block-lock EEPROM protection. Used in industrial microcontroller systems requiring reliable brown-out recovery and nonvolatile configuration storage.
For engineers reviewing the X5323P datasheet, X5323P pinout, X5323P application, or X5323P equivalent, this page delivers verified technical context, exact pin functions for SOIC/PDIP variants, confirmed VTRIP reprogramming capability, standby current specs (<1µA watchdog off), and two validated alternative parts with documented functional trade-offs.
Technical Context
The X5323P implements a dual-function CS/WDI pin that serves as both chip select and watchdog input-requiring HIGH-to-LOW transitions to reset the watchdog timer. Its reset logic asserts RESET/RESET active low when VCC drops below 4.5–4.75V (factory-programmed threshold) and holds it active for ≥200ms after VCC recovers.
Internally, the device combines a serial EEPROM array organized as 4k × 8 bits with Intersil's Block Lock™ protection, supporting 32-byte page writes and self-timed 10ms write cycles. The status register includes volatile WIP/WEL flags and nonvolatile WD0/WD1 watchdog timing bits (factory default: disabled) plus BL0/BL1 memory lock bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - powers system logic rails directly without LDO; supports legacy 5V microcontrollers. |
| VTRIP Threshold | 4.5V to 4.75V (typ. 4.63V) - precise brown-out detection aligned with 5V TTL logic thresholds. |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s - nonvolatile WD0/WD1 bits set fixed interval unaffected by power cycling. |
| EEPROM Capacity | 32kbits (4k × 8) - stores firmware version, calibration data, or device ID with 100k write cycles endurance. |
| Standby Current | <1µA (WDT off) - enables battery-backed operation for >10 years in low-power monitoring applications. |
| SPI Interface | 2MHz max, modes 0,0 and 1,1 - compatible with standard AVR, PIC, and ARM Cortex-M SPI peripherals. |
| Reset Output | Active-low open-drain RESET/RESET - drives external reset lines or pull-up resistors; valid down to VCC = 1V. |
Pinout & Package
Package: 8-lead PDIP (plastic dual in-line package), Pb-free, RoHS compliant, through-hole wave-solder only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS/WDI | Chip Select / Watchdog Input | LOW enables SPI commands; HIGH-to-LOW transition resets watchdog timer; no internal pull-up. |
| 2 SO | Serial Output | Push-pull data output; shifts MSB-first on SCK falling edge; high-impedance when CS HIGH. |
| 3 WP | Write Protect | Combined with WPEN bit to lock status register; LOW + WPEN=1 disables all nonvolatile writes. |
| 4 VSS | Ground | Reference return path for all digital and analog circuitry; must be connected before VCC. |
| 5 SI | Serial Input | Latches opcode/address/data on SCK rising edge; accepts MSB-first 8-bit instructions (e.g., WREN, READ). |
| 6 SCK | Serial Clock | Controls SPI timing; rising edge latches input, falling edge outputs data; static clock allowed. |
| 7 RESET/RESET | Reset Output | Active-low open-drain output; asserted during power-up, brown-out, or watchdog timeout; requires external pull-up. |
| 8 VCC | Supply Voltage | 4.5–5.5V input; powers internal reset comparator, EEPROM, and logic; VTRIP programming uses VCC as reference. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Voltage threshold adjustable via VP pulse sequence on SCK/SI; enables field calibration to ±0.1V accuracy. |
| Block Lock™ EEPROM Protection | Nonvolatile BL0/BL1 bits protect 0%, 25%, 50%, or 100% of memory - prevents accidental firmware overwrite. |
| Volatile Reset Source Flag | FLB bit distinguishes watchdog timeout vs. low-VCC reset - eliminates diagnostic ambiguity in failure analysis. |
| Power-Up Reset Timing | tPURST = 100–280ms - ensures oscillator stabilization before processor release; valid down to VCC = 1V. |
| In-Circuit Programmable ROM Mode | WP pin + WPEN bit locks status register permanently - enables secure manufacturing configuration burn-in. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Microcontroller-based PLC monitors sensor inputs and controls relays in factory automation environments with fluctuating 5V supply rails. IC Role / Device Role / Timing Role: X5323P provides brown-out reset at 4.63V, watchdog supervision of main loop execution, and EEPROM storage of I/O configuration tables. Use Value: Prevents erratic relay actuation during line sags; ensures deterministic recovery after power interruption; retains calibrated sensor offsets across firmware updates. |
Use Scenario: Battery-powered infusion pump executes safety-critical dosing algorithms with strict uptime requirements and regulatory traceability mandates. IC Role / Device Role / Timing Role: X5323P delivers fail-safe reset at VCC < 4.5V, monitors MCU health via 200ms watchdog timeout, and stores audit logs and calibration constants in protected EEPROM. Use Value: Guarantees immediate shutdown during battery depletion; detects software hangs before dose error occurs; maintains FDA-required 100-year data retention for calibration records. |
| Point-of-Sale Terminal | Smart Energy Meter |
Use Scenario: Retail terminal processes credit card transactions using a 5V-powered ARM microcontroller with external flash memory and real-time clock. IC Role / Device Role / Timing Role: X5323P supervises 5V rail integrity, restarts hung transaction handlers via WDI pin, and stores last-transaction ID and encryption keys in block-locked EEPROM. Use Value: Eliminates corrupted payment logs during AC dropout; enforces PCI-DSS key protection via hardware-level write lock; reduces BOM count by merging four discrete functions. |
Use Scenario: Utility meter operates unattended for 15+ years on lithium battery backup, logging kWh consumption and grid events under variable temperature conditions. IC Role / Device Role / Timing Role: X5323P provides extended-temperature (-40°C to +85°C) reset supervision, low-power watchdog (600ms timeout), and EEPROM storage of tamper logs with 100k-cycle endurance. Use Value: Ensures meter continues accurate billing during brown-outs; extends battery life via <1µA standby current; meets ANSI C12.20 Class 0.2 accuracy requirements for long-term data integrity. |
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; 3.0–5.5V supply. | Lacks field-adjustable trip point; smaller memory; suitable for cost-sensitive designs where 2.93V reset suffices. | Select when VTRIP flexibility is unnecessary and board space favors SOT23-6 over PDIP-8. |
| MCP9808-E/MS | Temperature sensor IC with I²C interface; no reset/watchdog/EEPROM functions - not functionally equivalent. | Not a CPU supervisor; serves thermal monitoring only; cannot replace X5323P in reset-critical systems. | Reject - misaligned function set; violates core requirement for integrated reset + watchdog + EEPROM. |
Compared with X5323P, MAX6361KA29+T offers lower cost and smaller footprint but sacrifices VTRIP programmability and halved EEPROM capacity; MCP9808-E/MS is functionally incompatible and must be excluded from supervisor replacement consideration.
Availability
X5323P is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, point-of-sale terminals, and smart energy meters requiring stable component supply with long lifecycle support.
Supply support for X5323P 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 medical applications, emphasizing precision voltage monitoring and robust system supervision.
The X5323P belongs to Intersil's CPU Supervisor family, engineered to consolidate reset, watchdog, voltage monitoring, and nonvolatile storage into one die-reducing PCB area and improving system-level reliability in safety-critical embedded systems.
FAQ
What is the factory-default VTRIP setting for X5323P?
The X5323P ships with a factory-programmed VTRIP range of 4.5V to 4.75V (typ. 4.63V), optimized for 5V systems. This threshold is nonvolatile and remains fixed unless reprogrammed using the VP pulse sequence on SCK and SI pins. The device does not ship with user-modified VTRIP values - all units begin at this calibrated specification.
Can X5323P operate with a 3.3V supply?
No, X5323P is specified only for 4.5V to 5.5V operation per its ordering code "-4.5A". It lacks internal regulation for 3.3V compatibility. For 3.3V systems, use X5323S8Z-2.7A (2.7–5.5V range, 2.85–3.0V VTRIP) or X5323S8IZ-2.7A for extended temperature. Attempting 3.3V operation on X5323P will result in undefined reset behavior and EEPROM write failures.
How is the watchdog timer enabled on X5323P?
The watchdog timer on X5323P is enabled by writing WD0=0 and WD1=0 (1.4s timeout), WD0=1 and WD1=0 (200ms), or WD0=0 and WD1=1 (600ms) to the status register via WRSR instruction. Factory default is WD1=1, WD0=1 (disabled). Once programmed, the setting persists across power cycles and cannot be altered without first clearing WPEN and pulling WP HIGH.
Does X5323P support SPI mode 0,1 or 1,0?
No, X5323P supports only SPI modes 0,0 (CPOL=0, CPHA=0) and 1,1 (CPOL=1, CPHA=1) as stated in the datasheet. It does not support mode 0,1 or 1,0. In mode 0,0, data is sampled on the rising edge of SCK and shifted out on the falling edge; correct timing alignment is required to avoid read corruption or failed writes.
What happens to the EEPROM contents during a VTRIP reprogramming sequence?
VTRIP reprogramming on X5323P affects only the internal voltage reference circuitry and does not alter EEPROM contents, status register bits (WD0/WD1/BL0/BL1), or memory array data. The procedure applies VP to SCK/SI while holding CS/WDI and WP HIGH - no EEPROM access or write cycle is initiated, ensuring full data retention and configuration integrity throughout the adjustment process.
X5323P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
X5323P FAQ
1.How can I place an order for X5323P through Aetrix?
Please submit a Request for Quotation (RFQ) for X5323P 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 X5323P reliable?
The price and inventory of X5323P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5323P is usually 5 days.
3.What payment methods are accepted for X5323P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5323P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5323P?
X5323P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5323P 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 X5323P?
For technical support, including X5323P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5323P requirements.
6.How does Aetrix verify that X5323P is sourced from the original manufacturer or authorized distributors?
All X5323P 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 X5323P meets industry standards.
7.What is the process for return or replacement of X5323P?
All X5323P units undergo pre-shipment inspection (PSI). If there is an issue with X5323P, 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 X5323P part is unused and in its original packaging.
Return procedure for X5323P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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