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Renesas X5328S8-2.7
- Part No.:
- X5328S8-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5328S8-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:407
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Product details
Overview
X5328S8-2.7 from Renesas Electronics is a CPU supervisor IC integrating power-on reset control, supply voltage supervision, and 32Kbit SPI EEPROM in an 8-lead SOIC package. It asserts an active-low RESET signal during power-up (down to VCC = 1V) and under brownout conditions, with factory-set VTRIP = 2.85–3.0V, and supports in-circuit reprogramming of the reset threshold. It operates across 2.7V–5.5V and delivers <1µA standby current - ideal for battery-backed microcontroller systems requiring reliable boot sequencing and nonvolatile configuration storage.
For engineers reviewing the X5328S8-2.7 datasheet, X5328S8-2.7 pinout, X5328S8-2.7 application, or X5328S8-2.7 equivalent, this device serves as a single-chip solution for power integrity monitoring and embedded parameter storage in space-constrained industrial controllers, IoT edge nodes, and medical diagnostics equipment where low-voltage operation and EEPROM write protection are critical.
Technical Context
The X5328S8-2.7 implements a dedicated analog voltage comparator with hysteresis (20mV) to monitor VCC against its programmable trip point (VTRIP), triggering a 200ms minimum reset timeout upon power-up or voltage drop below VTRIP. Its integrated SPI EEPROM uses Direct Write™ technology, enabling 100,000 write cycles and 100-year data retention, with block lock protection configurable via nonvolatile status register bits BL1/BL0.
Reset assertion is open-drain (RESET), compatible with both 3.3V and 5V logic families, and the SPI interface supports modes 0,0 and 1,1 at up to 2MHz. The device includes power-up/power-down write protection, a volatile Write Enable Latch (WEL), and programmable ROM mode activated by WP pin + WPEN bit - ensuring robust immunity to accidental writes during system operation or firmware updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports dual-supply systems and battery-powered designs down to 2.7V nominal. |
| VTRIP Threshold | 2.85V to 3.0V - factory-programmed reset activation voltage for brownout detection in 3.3V systems. |
| Reset Output | Active-low open-drain RESET - requires external pull-up; valid down to VCC = 1V for early power-fail detection. |
| EEPROM Capacity | 32Kbit (4KB) organized as x8 - sufficient for storing calibration data, device IDs, and firmware configuration parameters. |
| Standby Current | <1µA at VCC = 5.5V - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| SPI Clock Rate | Up to 2MHz - ensures fast read/write access without demanding high-speed MCU peripherals. |
| Write Cycle Time | 5ms typical (10ms max) - enables rapid parameter updates while maintaining EEPROM endurance. |
Pinout & Package
Package: 8-lead narrow-body SOIC (JEDEC MS-012, pkg drawing M8.15E), RoHS-compliant, Pb-free plus anneal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable for SPI communication; must transition HIGH→LOW before each command to enter active mode. |
| 2 SO | Serial Output | Push-pull data output; shifts out memory or status register contents on SCK falling edge. |
| 3 WP | Write Protect Input | Hardware lock for status register writes when WPEN bit = 1 - enables in-circuit programmable ROM mode. |
| 4 VSS | Ground Reference | Primary return path for all internal circuits and I/O drivers; must be low-impedance connection. |
| 5 SI | Serial Input | Input for opcodes, addresses, and data; latched on SCK rising edge; MSB-first protocol. |
| 6 SCK | Serial Clock | Master-generated clock controlling SPI timing; rising edge latches input, falling edge clocks output. |
| 7 RESET/RESET | Reset Output | Open-drain active-low reset signal; asserted during power-up and brownout; requires external pull-up resistor. |
| 8 VCC | Supply Voltage | Primary power input (2.7–5.5V); powers supervisor logic, EEPROM array, and I/O buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Threshold voltage can be adjusted in-system using VP pulses on SCK/SI pins - eliminates need for multiple BOM variants. |
| Block Lock Protection | Nonvolatile BL0/BL1 bits allow locking 0%, 25%, 50%, or 100% of EEPROM - prevents corruption of critical calibration or security data. |
| Power-Up Reset Timing | Guaranteed 100–280ms reset pulse width after VCC stabilization - ensures reliable MCU initialization across temperature and supply variations. |
| In-Circuit Programmable ROM Mode | WP pin + WPEN bit combination disables status register writes - enables secure manufacturing programming followed by permanent lock. |
| Low-Voltage Valid Reset | RESET remains functional down to VCC = 1V - detects deep brownout events before system logic fails catastrophically. |
Applications
| Industrial PLC I/O Module | Portable Medical Sensor Hub |
|---|---|
Use Scenario: A DIN-rail mounted I/O module stores per-channel calibration coefficients and firmware revision metadata in nonvolatile memory, while supervising 3.3V system rail during cold starts and line sags. IC Role / Device Role / Timing Role: X5328S8-2.7 provides synchronized power-on reset to the ARM Cortex-M4 MCU and safeguards EEPROM writes during transient undervoltage events. Use Value: Eliminates separate reset IC and serial EEPROM, reducing BOM count by two components and PCB area by >25mm² while guaranteeing deterministic boot behavior. |
Use Scenario: A handheld ECG sensor records patient session logs and stores factory-calibrated ADC offset/gain values, operating from a single CR2032 coin cell for >3 years. IC Role / Device Role / Timing Role: X5328S8-2.7 monitors the 3.0V LDO output and asserts RESET if voltage drops below 2.85V, preventing corrupted ECG waveform storage. Use Value: <1µA standby current extends battery life; block-lock protection prevents accidental overwrite of medical calibration data during field firmware updates. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
Use Scenario: An ANSI C12.20-compliant electricity meter retains tamper-detection timestamps and tariff tables across mains power interruptions and thermal cycling. IC Role / Device Role / Timing Role: X5328S8-2.7 holds the metering SoC in reset until 3.3V rail stabilizes post-power-up and protects EEPROM against write errors during voltage transients on the 12V-to-3.3V DC-DC converter. Use Value: 100-year data retention meets utility-grade longevity requirements; programmable VTRIP allows fine-tuning for specific DC-DC ripple profiles. |
Use Scenario: A BCM stores seat position memory, mirror presets, and door lock configuration in EEPROM, while ensuring microcontroller reset during vehicle battery cranking (9V–10V dips). IC Role / Device Role / Timing Role: X5328S8-2.7 supervises the 5V system rail and triggers RESET during cranking-induced brownouts, using its 2.85–3.0V VTRIP setting to match automotive 3.3V domain thresholds. Use Value: Single-package integration reduces EMC susceptibility vs. discrete solutions; open-drain RESET supports wired-OR reset bus architectures common in automotive domains. |
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 in-field VTRIP adjustment and half the EEPROM capacity - suitable only for static voltage-margin applications | Select when design requires guaranteed fixed-threshold reset without EEPROM customization needs |
| STM8AF6266TCY | MCU with integrated 2Kbyte EEPROM and reset generator; requires firmware development; 2.95–5.5V supply | Offers programmable reset logic and GPIO control but adds software validation burden and larger footprint | Select when system already uses STM8 and requires custom reset sequencing or runtime EEPROM management |
Compared with MAX6361KA29+T and STM8AF6266TCY, the X5328S8-2.7 uniquely combines field-adjustable reset voltage, 32Kbit EEPROM with hardware block lock, and sub-1µA quiescent current - making it optimal for cost-sensitive, battery-operated, or high-reliability applications where voltage margins vary or EEPROM integrity is mission-critical.
Availability
X5328S8-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for X5328S8-2.7 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT markets.
The X5328S8-2.7 belongs to Renesas' CPU Supervisor with EEPROM product line, designed specifically to consolidate power monitoring, reset generation, and nonvolatile storage into one robust, low-power package for resource-constrained embedded systems.
FAQ
What is the factory-programmed VTRIP range for X5328S8-2.7?
The X5328S8-2.7 is factory-programmed with a VTRIP range of 2.85V to 3.0V, optimized for reliable brownout detection in 3.3V systems. This threshold is verified during production and remains stable over temperature and time unless explicitly reprogrammed using the VP-based sequence defined in the datasheet. Reprogramming requires applying precise voltage levels to SCK and SI pins while holding CS and WP high.
Does X5328S8-2.7 support both active-high and active-low reset outputs?
No - the X5328S8-2.7 provides only an active-low RESET output (open-drain). The part number suffix "X5328" denotes active-low reset; "X5329" variants provide active-high reset. X5328S8-2.7 is not interchangeable with X5329-series parts due to fundamental reset polarity differences and associated internal logic mapping.
Can the EEPROM in X5328S8-2.7 be written while the RESET output is asserted?
Yes - the EEPROM remains fully accessible via SPI even when RESET is asserted. The reset function and memory interface operate independently; asserting RESET halts the host processor but does not disable the X5328S8-2.7's SPI controller or EEPROM array. However, write operations should be avoided during power transitions to prevent data corruption.
What is the maximum write endurance and data retention specification for X5328S8-2.7's EEPROM?
X5328S8-2.7 guarantees a minimum of 100,000 write/erase cycles and 100 years of data retention at +25°C, enabled by Renesas' proprietary Direct Write™ EEPROM cell technology. These specifications are validated per JEDEC standards and apply across the full operating temperature range (0°C to +70°C for the X5328S8-2.7 variant).
How does the Block Lock protection work on X5328S8-2.7?
Block Lock protection on X5328S8-2.7 is controlled by nonvolatile BL0 and BL1 bits in the status register. Setting these bits locks 0%, 25%, 50%, or 100% of the 32Kbit EEPROM array against writes while allowing reads. Once locked, protected blocks remain immutable until BL0/BL1 are rewritten - providing hardware-enforced write protection independent of software state.
X5328S8-2.7 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5328S8-2.7 FAQ
1.How can I place an order for X5328S8-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5328S8-2.7 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 X5328S8-2.7 reliable?
The price and inventory of X5328S8-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5328S8-2.7 is usually 5 days.
3.What payment methods are accepted for X5328S8-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5328S8-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5328S8-2.7?
X5328S8-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5328S8-2.7 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 X5328S8-2.7?
For technical support, including X5328S8-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5328S8-2.7 requirements.
6.How does Aetrix verify that X5328S8-2.7 is sourced from the original manufacturer or authorized distributors?
All X5328S8-2.7 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 X5328S8-2.7 meets industry standards.
7.What is the process for return or replacement of X5328S8-2.7?
All X5328S8-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X5328S8-2.7, 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 X5328S8-2.7 part is unused and in its original packaging.
Return procedure for X5328S8-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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