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Renesas X5168S8-2.7A
- Part No.:
- X5168S8-2.7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5168S8-2.7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,611
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Product details
Overview
X5168S8-2.7A from Intersil is a CPU supervisor IC with integrated 16Kbit SPI EEPROM, providing power-on reset control, low-voltage supervision (VTRIP = 2.85V–3.0V), and block-lock protected nonvolatile memory in an 8-lead SOIC package. It operates across 2.7V–5.5V supply, delivers <50µA standby current with watchdog enabled, and supports 2MHz SPI interface (modes 0,0 and 1,1) for microcontroller-based embedded systems requiring reliable boot integrity and configuration storage.
For engineers reviewing the X5168S8-2.7A datasheet, X5168S8-2.7A pinout, X5168S8-2.7A application, or X5168S8-2.7A equivalent, key selection considerations include its programmable VTRIP threshold, 32-byte page write capability, RESET/RESET active-low output with 200ms timeout, and Block Lock™ protection covering 0–100% of EEPROM array - all validated for commercial temperature range (0°C to +70°C).
Technical Context
The X5168S8-2.7A integrates three core functions: a power-on reset generator that asserts RESET/RESET at ~1V and holds it for 200ms after VCC stabilizes above VTRIP; a precision low-voltage monitor with factory-set 2.85V–3.0V trip point (reprogrammable via VP pulse sequence); and a 16Kbit (2K × 8) SPI EEPROM with Direct Write™ cells rated for 100,000 write cycles and 100-year data retention.
Its SPI interface complies with standard modes 0,0 and 1,1, uses MSB-first transmission, and requires WREN instruction before any write. The status register includes volatile WIP and WEL bits plus nonvolatile BL0/BL1 for configurable block protection (0%, 25%, 50%, or 100% of memory), and WPEN enables in-circuit programmable ROM mode when WP is grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports single-supply operation across wide industrial and consumer rails. |
| VTRIP Threshold | 2.85V to 3.0V - factory-programmed reset voltage for brownout detection; reprogrammable via VP pulse. |
| EEPROM Size | 16Kbit (2048 × 8) - sufficient for firmware versioning, calibration data, and device configuration storage. |
| SPI Speed | Up to 2MHz - compatible with mainstream microcontrollers without timing constraints. |
| Standby Current | <50µA (watchdog on), <1µA (watchdog off) - enables ultra-low-power battery-backed applications. |
| Reset Timeout | 200ms after VCC ≥ VTRIP - ensures oscillator and power supply stabilization before processor release. |
| Write Cycle Time | 5ms typical (page write), 10ms max - minimizes firmware update latency during field programming. |
Pinout & Package
Package: 8-lead SOIC (MDP0027), RoHS-compliant Pb-free option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; must transition HIGH→LOW before each command; places device in active mode when LOW. |
| 2 SO | Serial Output | Push-pull data output; shifts read data on falling edge of SCK; high-impedance when CS HIGH. |
| 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 return path for all internal circuits and I/O pins. |
| 5 RESET/RESET | Reset Output | Open-drain active-low reset signal; asserted during power-up, brownout, or watchdog timeout; requires external pull-up. |
| 6 SCK | Serial Clock | Controls SPI timing; rising edge latches SI data; falling edge clocks SO data. |
| 7 SI | Serial Input | MSB-first command/address/data input; latched on rising edge of SCK. |
| 8 VCC | Supply Voltage | Primary power rail (2.7V–5.5V); powers reset circuitry, EEPROM, and SPI interface. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Allows field-tuning of reset threshold from 1.7V to 5.0V using VP pulse sequence - eliminates BOM variants for margin-critical designs. |
| Block Lock™ Protection | Configurable nonvolatile lock of 0%, 25%, 50%, or 100% EEPROM array via BL0/BL1 bits - prevents accidental overwrites of critical calibration or security data. |
| Self-Timed Page Writes | 32-byte page write mode with 5ms typical internal cycle time - reduces host MCU intervention and improves firmware update throughput. |
| Power-Up Reset Validity | RESET/RESET asserted down to VCC = 1V - guarantees safe boot sequencing even under weak or sagging supplies. |
| In-Circuit Programmable ROM Mode | WP pin + WPEN bit combination disables status register writes while allowing EEPROM reads - enables secure manufacturing provisioning and field lockdown. |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: A programmable logic controller stores I/O mapping tables and firmware revision history in nonvolatile memory while monitoring 3.3V system rail for brownout events. IC Role / Device Role / Timing Role: X5168S8-2.7A provides synchronized power-on reset, detects VCC drop below 2.85V, and retains configuration across power cycles via protected EEPROM. Use Value: Eliminates external reset IC and discrete EEPROM, reducing PCB area by 35% and enabling deterministic boot within 200ms of power application. |
Use Scenario: Portable ultrasound equipment requires tamper-proof storage of calibration coefficients and usage logs, with guaranteed reset assertion during battery voltage decay. IC Role / Device Role / Timing Role: X5168S8-2.7A serves as both supervisor and secure parameter store, using Block Lock™ to protect calibration data and programmable VTRIP to match battery discharge profile. Use Value: Prevents corrupted calibration due to low-VCC operation and ensures regulatory compliance via 100-year data retention and 100,000-cycle endurance. |
| Smart Energy Meter | Automotive Infotainment Head Unit |
Use Scenario: Electricity meter records tariff schedules and tamper events in EEPROM while supervising 3.3V MCU supply under wide-temperature grid conditions. IC Role / Device Role / Timing Role: X5168S8-2.7A monitors VCC for dips during relay switching, asserts RESET/RESET to halt metering during instability, and stores time-stamped logs in protected memory blocks. Use Value: Meets IEC 62056 accuracy requirements by preventing erroneous kWh accumulation during brownouts and enabling audit-trail logging without external FRAM. |
Use Scenario: In-vehicle navigation system stores user preferences and firmware patch metadata, requiring robust reset behavior during cold-crank (low-battery) conditions. IC Role / Device Role / Timing Role: X5168S8-2.7A delivers early-reset assertion at 1V and holds RESET/RESET for 200ms after VCC exceeds 2.85V - ensuring clean boot during engine start transients. Use Value: Avoids GUI freeze or audio dropout by guaranteeing MCU reset before voltage collapse reaches critical thresholds, validated across 0°C–70°C. |
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 SPI EEPROM; 3.0V–5.5V supply. | Lacks field-adjustable trip point; suitable only where fixed threshold suffices. | Select when design requires guaranteed drop-in replacement with identical SOIC-8 footprint and no need for VTRIP tuning. |
| STM802LSD-29F | 2.93V fixed reset; no integrated EEPROM; requires external serial memory; 2.7V–5.5V supply. | Separate EEPROM needed for configuration storage; increases BOM count and layout complexity. | Choose if cost sensitivity outweighs integration benefit and external memory is already present in design. |
Compared with MAX6361KA29+T and STM802LSD-29F, X5168S8-2.7A uniquely combines reprogrammable VTRIP, integrated EEPROM with Block Lock™, and sub-1V reset validity - making it optimal for designs requiring field-calibrated brownout response and secure parameter storage without additional components.
Availability
X5168S8-2.7A is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, smart energy meters, automotive infotainment head units, and portable instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for X5168S8-2.7A 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 company specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.
The X5168/X5169 family was designed to replace discrete reset + EEPROM solutions in cost- and space-constrained embedded systems, integrating supervision, memory, and programmability into a single SOIC/TSSOP/PDIP package.
FAQ
What is the factory-set VTRIP voltage for X5168S8-2.7A?
The X5168S8-2.7A has a factory-programmed VTRIP range of 2.85V to 3.0V, optimized for 3.3V system rails. This threshold is reprogrammable via a VP pulse sequence applied to SCK and SI pins, allowing adjustment between 1.7V and 5.0V to match specific application requirements without hardware changes.
Does X5168S8-2.7A support both active-low and active-high reset outputs?
No - X5168S8-2.7A provides only an active-low RESET/RESET output (open-drain). The X5169 variant offers active-high reset; however, X5168S8-2.7A is strictly active-low. External pull-up resistor is required for proper logic-level translation and noise immunity in the target system.
How does the Block Lock™ protection work in X5168S8-2.7A?
X5168S8-2.7A uses nonvolatile BL0 and BL1 bits in its status register to configure EEPROM protection: 00 = no lock, 01 = upper 25% ($0600–$07FF), 10 = upper 50% ($0400–$07FF), 11 = full array ($0000–$07FF). Once set, locked blocks allow reads but reject writes until BL bits are reprogrammed - preventing accidental corruption of calibration or security data.
What is the maximum SPI clock frequency supported by X5168S8-2.7A?
X5168S8-2.7A supports SPI clock frequencies up to 2MHz across its full 2.7V–5.5V VCC range. Timing parameters including tSU (50ns), tH (50ns), tWH/tWL (200ns), and tCYC (500ns) are guaranteed per the FN8130.2 datasheet, enabling interoperability with ARM Cortex-M, PIC, and AVR microcontrollers without custom timing adjustments.
Can X5168S8-2.7A operate reliably at 2.7V supply?
Yes - X5168S8-2.7A is fully specified for operation down to 2.7V, with functional reset assertion down to 1V and valid SPI communication at minimum VCC. Its <1µA standby current (watchdog off) and 5ms typical write cycle time ensure robust performance in battery-powered or low-voltage industrial applications.
X5168S8-2.7A 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:
- 2.93V
- 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
X5168S8-2.7A FAQ
1.How can I place an order for X5168S8-2.7A through Aetrix?
Please submit a Request for Quotation (RFQ) for X5168S8-2.7A 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 X5168S8-2.7A reliable?
The price and inventory of X5168S8-2.7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5168S8-2.7A is usually 5 days.
3.What payment methods are accepted for X5168S8-2.7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5168S8-2.7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5168S8-2.7A?
X5168S8-2.7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5168S8-2.7A 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 X5168S8-2.7A?
For technical support, including X5168S8-2.7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5168S8-2.7A requirements.
6.How does Aetrix verify that X5168S8-2.7A is sourced from the original manufacturer or authorized distributors?
All X5168S8-2.7A 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 X5168S8-2.7A meets industry standards.
7.What is the process for return or replacement of X5168S8-2.7A?
All X5168S8-2.7A units undergo pre-shipment inspection (PSI). If there is an issue with X5168S8-2.7A, 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 X5168S8-2.7A part is unused and in its original packaging.
Return procedure for X5168S8-2.7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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