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Renesas X5168P
- Part No.:
- X5168P
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X5168P.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,816
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Product details
Overview
X5168P from Intersil is a CPU supervisor IC with integrated 16Kbit SPI EEPROM, combining power-on reset control, supply voltage supervision (VTRIP = 4.5–4.75 V), and block-lock protected nonvolatile memory in an 8-lead PDIP package. It asserts active-low RESET during power-up and brownout conditions, supports 2 MHz SPI communication, and enables in-circuit programmable ROM mode via WP pin and WPEN bit for secure configuration storage in embedded microcontroller systems.
For engineers reviewing the X5168P datasheet, X5168P pinout, X5168P application, or X5168P equivalent, key selection considerations include its 4.5–4.75 V reset threshold, 8-lead PDIP package with Pb-free option, 16Kbit EEPROM with 32-byte page write, <1 µA standby current (watchdog off), and reprogrammable VTRIP capability for precision voltage monitoring.
Technical Context
The X5168P implements a dual-function architecture: a low-voltage detection circuit with hysteresis (20 mV) triggers RESET/RESET when VCC drops below the programmed trip point, and a serial EEPROM controller compliant with SPI modes 0,0 and 1,1. Its reset assertion remains valid down to VCC = 1 V, and power-up reset timeout is guaranteed at 100–280 ms.
Internally, it integrates a command decode & control logic block managing both supervisor functions and EEPROM operations, including WREN/WRSR/READ/WRITE instructions, status register access (WIP, WEL, BL0/BL1), and Block Lock™ protection covering 0%, 25%, 50%, or 100% of the 2K × 8 array. The device supports in-system VTRIP reprogramming using VP = 15–18 V applied to SCK/SI (set) or SI only (reset).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Range | 4.5–4.75 V - precise brownout detection threshold for 5 V systems, factory-set and reprogrammable |
| EEPROM Capacity | 16 Kbit (2048 × 8) - sufficient for firmware versioning, calibration data, and device-specific configuration storage |
| SPI Interface Speed | 2 MHz max - compatible with standard microcontroller SPI peripherals without requiring clock dividers |
| Standby Current | <1 µA (watchdog off) - enables ultra-low-power operation in battery-backed or energy-sensitive applications |
| Reset Valid Voltage | 1 V - ensures reliable reset assertion even during deep brownout or slow power ramp-up |
| Power Supply Range | 4.5–5.5 V - matches nominal 5 V rail operation with margin for ripple and tolerance |
| Package | 8-lead PDIP (MDP0031) - through-hole mounting for prototyping, industrial control, and legacy board compatibility |
Pinout & Package
8-lead PDIP package (MDP0031), Pb-free anneal option available (X5168PZ-4.5A). Pinout validated per FN8130.2 datasheet Figure 3 and Pin Description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select Input | Active-low enable for SPI interface; must transition HIGH→LOW before each instruction; places device in active mode |
| 2 (SO) | Serial Output | Push-pull data output; shifts out read data or status register on falling edge of SCK |
| 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; requires low-impedance connection to system GND |
| 5 (SI) | Serial Input | MSB-first data input for opcodes, addresses, and memory data; latched on rising edge of SCK |
| 6 (SCK) | Serial Clock | Master-controlled timing signal; rising edge latches SI, falling edge updates SO |
| 7 (RESET/RESET) | Reset Output | Open-drain active-low reset signal; asserted during power-up, brownout (<4.5 V), or watchdog timeout |
| 8 (VCC) | Supply Voltage | 4.5–5.5 V power input; powers supervisor logic, EEPROM core, and I/O buffers; also used as VTRIP reference |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Enables field-adjustment of reset threshold (1.7–5.0 V range) using 15–18 V programming pulses on SCK/SI or SI only |
| Block Lock™ Protection | Nonvolatile BL0/BL1 bits allow selective write-protection of 0%, 25%, 50%, or 100% of EEPROM array without hardware changes |
| In-Circuit Programmable ROM Mode | WP pin + WPEN bit combination disables status register writes after manufacturing configuration, preventing runtime corruption |
| Self-Timed Page Write | 32-byte page write with 5 ms typical cycle time eliminates need for external timing control or polling overhead |
| Low-Voltage Reset Validity | RESET remains functional down to VCC = 1 V, ensuring deterministic behavior during severe undervoltage events |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: A programmable logic controller monitors sensor inputs and executes safety-critical control logic under 5 V supply. IC Role / Device Role / Timing Role: X5168P provides power-on reset initialization, brownout protection, and stores calibrated sensor offsets and firmware revision in EEPROM. Use Value: Prevents erratic operation during line fluctuations and retains critical calibration data across power cycles without external backup. | Use Scenario: Portable ultrasound equipment operates from battery and AC adapter, requiring reliable boot sequencing and configuration persistence. IC Role / Device Role / Timing Role: X5168P asserts RESET until 5 V rail stabilizes, supervises VCC during battery discharge, and stores user preferences and transducer calibration in protected EEPROM. Use Value: Guarantees safe startup and prevents corrupted settings due to partial writes during power loss. |
| Point-of-Sale Terminal | Smart Energy Meter |
Use Scenario: Retail terminal boots from flash, loads application firmware, and validates transaction logs after AC power restoration. IC Role / Device Role / Timing Role: X5168P holds processor in reset until 5 V rail reaches 4.5 V and remains stable for 200 ms, while storing audit trail metadata in EEPROM. Use Value: Eliminates boot failures caused by underspecified power supplies and ensures tamper-resistant logging via Block Lock™. | Use Scenario: Utility meter records kWh consumption and tariff schedules, operating continuously on mains power with backup capacitor holdup. IC Role / Device Role / Timing Role: X5168P detects brownout events below 4.5 V and triggers controlled shutdown, preserving last-read energy values in EEPROM before power loss. Use Value: Maintains billing accuracy during grid instability and supports field-upgradable tariff tables with write protection. |
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 |
|---|---|---|---|
| MAX6900EPA+ | 8-pin SOIC only; fixed 4.63 V reset threshold; no VTRIP reprogramming; 16 Kbit EEPROM with 16-byte page write | Lacks field-adjustable reset voltage and PDIP packaging; lower write endurance (10K cycles vs. 100K) | Select when board space is constrained and fixed threshold suffices; avoid if VTRIP tuning or through-hole mounting required. |
| DS1232LP-10+T&R | 8-pin PDIP; fixed 4.63 V reset; no integrated EEPROM; separate 24C02 I²C EEPROM needed | Requires additional component count and PCB area; no SPI interface or block-lock protection | Choose only when cost sensitivity outweighs integration benefits and I²C is preferred over SPI. |
Compared with MAX6900EPA+ and DS1232LP-10+T&R, the X5168P uniquely combines reprogrammable VTRIP, 8-lead PDIP packaging, and 100K-cycle EEPROM in a single chip-enabling field calibration, legacy board compatibility, and robust data retention without design compromises.
Availability
X5168P is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, point-of-sale terminals, and smart metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole solutions.
Supply support for X5168P 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, computing, and communications markets.
The X5168P belongs to Intersil's CPU Supervisor with EEPROM product line, designed to reduce system cost and board area by integrating reset supervision, voltage monitoring, and nonvolatile storage into a single IC for microcontroller-based embedded systems.
FAQ
What is the reset polarity and output type of the X5168P?
The X5168P features an active-low RESET/RESET output implemented as an open-drain driver. This allows wired-OR configuration with other reset sources and requires an external pull-up resistor to VCC. The output remains asserted (low) during power-up until VCC exceeds the VTRIP threshold (4.5–4.75 V) and stabilizes for 200 ms, and reasserts during brownout or watchdog timeout. The X5168P does not provide active-high reset output - that function is implemented in the pin-compatible X5169P variant.
Can the VTRIP voltage of the X5168P be changed after soldering to the PCB?
Yes, the X5168P supports in-system VTRIP reprogramming using external 15–18 V pulses applied to SCK and SI (to set) or SI only (to reset), with CS pulsed LOW→HIGH. This procedure requires no device removal and enables field calibration of the reset threshold. The X5168P maintains its programmed VTRIP across temperature (±25 mV variation from 0°C to 75°C) and retains the setting indefinitely without power. Reprogramming is verified by measuring RESET deassertion voltage under controlled VCC ramp.
What EEPROM protection mechanisms does the X5168P provide beyond standard write enable?
The X5168P implements three layered EEPROM protections: (1) volatile Write Enable Latch (WEL) requiring WREN instruction before any write, (2) nonvolatile Block Lock™ bits (BL0/BL1) enabling hardware-level write protection of 0%, 25%, 50%, or 100% of memory, and (3) in-circuit programmable ROM mode activated by WP pin + WPEN bit to disable status register writes entirely. These features prevent accidental or malicious corruption of calibration data, firmware flags, or security keys stored in the X5168P's 16Kbit EEPROM array.
Is the X5168P still recommended for new designs according to its datasheet?
No - the official Intersil FN8130.2 datasheet (June 15, 2006) explicitly states "NOT RECOMMENDED FOR NEW DESIGNS" and lists "NO RECOMMENDED REPLACEMENT". However, Aetrix Electronics continues to supply the X5168P for legacy system repair, long-lifecycle industrial programs, and applications where its specific combination of PDIP packaging, reprogrammable VTRIP, and integrated EEPROM remains technically optimal. Customers should evaluate obsolescence risk and consider migration paths for future production ramps.
What is the maximum write endurance and data retention specification for the X5168P's EEPROM?
The X5168P's EEPROM is specified for a minimum of 100,000 write/erase cycles and 100 years of data retention at +25°C, based on Intersil's Direct Write™ cell technology. These values are guaranteed under recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to +70°C). Retention decreases with elevated temperature and voltage stress; at +85°C, retention is rated for ≥10 years. The X5168P achieves this reliability without requiring external high-voltage programming circuitry - all writes use standard VCC-level SPI commands.
X5168P 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
X5168P FAQ
1.How can I place an order for X5168P through Aetrix?
Please submit a Request for Quotation (RFQ) for X5168P 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 X5168P reliable?
The price and inventory of X5168P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5168P is usually 5 days.
3.What payment methods are accepted for X5168P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5168P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5168P?
X5168P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5168P 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 X5168P?
For technical support, including X5168P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5168P requirements.
6.How does Aetrix verify that X5168P is sourced from the original manufacturer or authorized distributors?
All X5168P 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 X5168P meets industry standards.
7.What is the process for return or replacement of X5168P?
All X5168P units undergo pre-shipment inspection (PSI). If there is an issue with X5168P, 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 X5168P part is unused and in its original packaging.
Return procedure for X5168P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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