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Renesas X5165S8-2.7A
- Part No.:
- X5165S8-2.7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5165S8-2.7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
X5165S8-2.7A from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 16Kbit SPI EEPROM in an 8-lead SOIC package. It asserts active-low RESET at VCC ≥ 1V, supports selectable watchdog timeout (200ms/600ms/1.4s), features reprogrammable VTRIP (2.85–3.0V), and operates from 2.7V to 5.5V - used in embedded microcontroller systems requiring reliable boot sequencing and nonvolatile configuration storage.
For engineers reviewing the X5165S8-2.7A datasheet, X5165S8-2.7A pinout, X5165S8-2.7A application, or X5165S8-2.7A equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in FN8128 Rev 4.00 and official ordering data.
Technical Context
The X5165S8-2.7A implements a dual-function reset architecture: power-on reset activates at VCC = 1V and holds RESET low for 100–280ms, while low-VCC detection triggers RESET when VCC drops below 2.85V (typical) with 20mV hysteresis. Its watchdog timer uses CS/WDI pin transitions to monitor MCU health, with timeout period set by nonvolatile WD0/WD1 bits (200ms, 600ms, or 1.4s).
Internally, it combines a 16Kbit (2K × 8) SPI EEPROM with Block Lock™ protection (0%, 25%, 50%, or 100% array lockable), Direct Write™ memory cells (100k write cycles, 100-year retention), and a 2MHz SPI interface compliant with modes 0,0 and 1,1 - all sharing a single 4-wire bus (CS/WDI, SI, SO, SCK) and powered from 2.7–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 5.5V - supports wide-input industrial and battery-powered systems without external regulators. |
| VTRIP Threshold | 2.85V to 3.0V - factory-programmed trip point enabling precise brownout detection for 3.3V logic domains. |
| Watchdog Timeout | Selectable: 200ms / 600ms / 1.4s - configurable via nonvolatile status register bits for flexible MCU fault recovery timing. |
| EEPROM Size | 16Kbit (2048 × 8) - sufficient for storing bootloader parameters, calibration data, or device identity in space-constrained designs. |
| Standby Current | <20µA at 3.6V with WDT ON - enables ultra-low-power operation in always-on monitoring applications. |
| SPI Speed | Up to 2MHz - compatible with standard microcontroller SPI peripherals without clock divider tuning. |
| Reset Valid Voltage | 1V - ensures early and stable reset assertion during slow-ramp power-up sequences. |
Pinout & Package
Package: 8-lead SOIC (RoHS-compliant, MDP0027 footprint). Pinout validated per FN8128 Rev 4.00 Page 4 and Page 2.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS/WDI) | Chip Select / Watchdog Input | Active-low enable for SPI commands; falling edge resets watchdog timer - dual-role pin reduces board routing complexity. |
| 2 (SO) | Serial Output | Push-pull output delivering EEPROM or status register data on SCK falling edge - no external pull-up required. |
| 3 (WP) | Write Protect | Hardware-enabled 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 internal circuits and I/O - must be connected to system ground plane for noise immunity. |
| 5 (SI) | Serial Input | Accepts opcodes, addresses, and data MSB-first on SCK rising edge - supports full SPI command set including WREN, WRITE, RDSR. |
| 6 (SCK) | Serial Clock | Master-generated clock synchronizing all SPI transfers - supports 0,0 and 1,1 modes for compatibility with diverse MCUs. |
| 7 (RESET/RESET) | Active-Low Reset Output | Open-drain output asserted low during power-up, brownout, or watchdog timeout - requires external pull-up for system reset signaling. |
| 8 (VCC) | Supply Voltage | Primary power input for all internal blocks - powers reset generator, watchdog, EEPROM, and SPI interface simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Voltage threshold adjustable via VP programming sequence - enables field-tuning for system-specific brownout margins without hardware change. |
| Block Lock™ EEPROM Protection | Configurable 0%/25%/50%/100% array lock via BL0/BL1 bits - allows partial firmware parameter storage while protecting critical bootloader sections. |
| Volatile Watchdog/Reset Flag | FLB bit distinguishes watchdog timeout vs. low-VCC reset - enables software-initiated recovery paths based on root cause. |
| Self-Timed EEPROM Writes | 5ms typical write cycle time with 32-byte page mode - eliminates need for software polling delays during configuration updates. |
| Low-Power Standby | <1µA with WDT disabled - extends battery life in maintenance-free remote sensors and IoT endpoints. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Real-time motor control with safety-critical firmware integrity checks. IC Role / Device Role / Timing Role: Supervisor IC providing power-on reset, brownout detection at 2.85V, and watchdog timeout monitoring of main MCU execution. Use Value: Prevents erratic actuator behavior during undervoltage conditions and forces safe shutdown upon MCU lockup - meeting IEC 62304 Class C requirements. |
Use Scenario: Battery-powered drug delivery system requiring tamper-resistant calibration storage. IC Role / Device Role / Timing Role: Nonvolatile configuration manager storing dose tables, serial numbers, and sensor offsets in protected EEPROM blocks. Use Value: Block Lock™ prevents unauthorized modification of dosing parameters while allowing field updates to user-interface settings - supporting FDA 21 CFR Part 11 compliance. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: CAN-based vehicle subsystem managing door locks, lighting, and diagnostics. IC Role / Device Role / Timing Role: Power supervisor ensuring clean MCU boot after ignition cycling and detecting alternator voltage sag. Use Value: RESET valid down to VCC = 1V guarantees deterministic startup even during cranking transients - eliminating boot failures in cold-cranking scenarios. |
Use Scenario: Revenue-grade meter logging tariff schedules and consumption history across power outages. IC Role / Device Role / Timing Role: EEPROM + supervisor combo preserving metering data during grid instability and asserting reset during brownouts. Use Value: 100-year data retention and 100k write endurance ensure accurate billing records over 20+ year product lifetime - satisfying ANSI C12.20 accuracy mandates. |
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 |
|---|---|---|---|
| MAX6361KA29+T | Fixed 2.93V reset threshold; no VTRIP reprogramming; 16Kbit SPI EEPROM; same 8-SOIC package. | Lacks field-adjustable trip point - suitable only where fixed threshold suffices and no fine-tuning needed. | Choose when design requires drop-in replacement with identical pinout and basic functionality but no VTRIP customization. |
| STM8AF6266TCY | Integrated 8-bit MCU with built-in 16KB flash and reset supervisor - not a standalone supervisor; requires firmware development. | Replaces discrete supervisor + EEPROM with programmable SoC - adds flexibility but increases BOM and validation effort. | Choose when system needs programmable reset logic, custom watchdog behavior, or firmware-based configuration management beyond static EEPROM. |
Compared with MAX6361KA29+T and STM8AF6266TCY, the X5165S8-2.7A uniquely delivers field-reprogrammable brownout thresholds alongside guaranteed EEPROM endurance - making it optimal for applications requiring post-deployment voltage margin tuning and long-term data integrity without MCU intervention.
Availability
X5165S8-2.7A is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, and smart energy meters requiring stable component supply across extended production lifecycles.
Supply support for X5165S8-2.7A 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 (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and power management ICs for industrial, computing, and communications markets.
The X5165S8-2.7A belongs to Intersil's CPU Supervisor family, designed specifically to consolidate reset, watchdog, voltage monitoring, and nonvolatile storage into a single chip - reducing system cost and improving reliability in resource-constrained embedded systems.
FAQ
What is the exact VTRIP voltage range for X5165S8-2.7A?
The X5165S8-2.7A has a factory-programmed VTRIP range of 2.85V to 3.0V (minimum to maximum), as specified in the Ordering Information table on Page 3 of FN8128 Rev 4.00. This range is optimized for 3.3V systems and can be reprogrammed higher using the VP-based sequence described on Pages 5–6 - but not lowered without first executing the VTRIP reset procedure.
Does X5165S8-2.7A support both active-low and active-high reset outputs?
No - the X5165S8-2.7A provides only an active-low RESET/RESET output (pin 7), as confirmed by its part number suffix "-2.7A" (denoting active-low reset) and the functional description on Page 4. The X5163 variant offers active-high reset, but X5165S8-2.7A is strictly active-low and cannot be configured otherwise.
Can the watchdog timeout period of X5165S8-2.7A be changed after initial programming?
Yes - the watchdog timeout (200ms/600ms/1.4s) is set by nonvolatile WD0/WD1 bits in the status register and can be rewritten via the WRSR instruction. However, if WPEN = 1 and WP = LOW, the status register becomes write-protected; changing the timeout then requires temporarily pulling WP HIGH or clearing WPEN first.
What is the maximum write endurance and data retention for the EEPROM in X5165S8-2.7A?
The EEPROM in X5165S8-2.7A provides minimum 100,000 write cycles and minimum 100 years of data retention, as stated on Page 7 under "SPI Serial Memory" and confirmed by the Direct Write™ cell technology. These values are guaranteed across the full operating temperature range (0°C to +70°C) and do not degrade with VTRIP reprogramming.
Is X5165S8-2.7A RoHS-compliant and what is its moisture sensitivity level?
Yes - X5165S8-2.7A is RoHS-compliant (Pb-free plus anneal), as noted in the Ordering Information table on Page 2. Its moisture sensitivity level (MSL) meets or exceeds Pb-free peak reflow requirements per IPC/JEDEC J-STD-020, though the exact MSL rating is not published in FN8128 Rev 4.00 and must be verified against current Renesas packaging documentation.
X5165S8-2.7A 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:
- 2.92V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5165S8-2.7A FAQ
1.How can I place an order for X5165S8-2.7A through Aetrix?
Please submit a Request for Quotation (RFQ) for X5165S8-2.7A 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 X5165S8-2.7A reliable?
The price and inventory of X5165S8-2.7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5165S8-2.7A is usually 5 days.
3.What payment methods are accepted for X5165S8-2.7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5165S8-2.7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5165S8-2.7A?
X5165S8-2.7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5165S8-2.7A 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 X5165S8-2.7A?
For technical support, including X5165S8-2.7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5165S8-2.7A requirements.
6.How does Aetrix verify that X5165S8-2.7A is sourced from the original manufacturer or authorized distributors?
All X5165S8-2.7A 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 X5165S8-2.7A meets industry standards.
7.What is the process for return or replacement of X5165S8-2.7A?
All X5165S8-2.7A units undergo pre-shipment inspection (PSI). If there is an issue with X5165S8-2.7A, 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 X5165S8-2.7A part is unused and in its original packaging.
Return procedure for X5165S8-2.7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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