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Renesas X4283V8I-2.7A
- Part No.:
- X4283V8I-2.7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
X4283V8I-2.7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
X4283V8I-2.7A from Xicor (now part of Renesas) is a CPU supervisor IC integrating power-on reset control, selectable watchdog timer, supply voltage supervision, and 128 Kbit serial EEPROM with Block Lock™ protection. It operates from 2.7V to 5.5V, features 400 kHz 2-wire interface, <20 µA standby current (watchdog on), and asserts RESET/RESET down to VCC = 1 V - used in embedded microcontroller systems requiring reliable boot sequencing and nonvolatile configuration storage.
For engineers reviewing the X4283V8I-2.7A datasheet, X4283V8I-2.7A pinout, X4283V8I-2.7A application, or X4283V8I-2.7A equivalent, key selection criteria include programmable VTRIP threshold (adjustable via VP programming), three watchdog timeout options (200 ms / 600 ms / 1.4 s), 64-byte page write capability, hardware write protection via WP pin + WPEN bit, and SOIC-8 packaging with verified pin compatibility across X4283/X4285 variants.
Technical Context
The X4283V8I-2.7A implements a dual-function supervisory architecture: analog voltage monitoring with hysteresis-based reset assertion and digital watchdog logic triggered by SDA transitions during HIGH SCL states. Its reset output (RESET/RESET) is open-drain, active-low/high configurable, and remains asserted for 250 ms after VCC stabilizes above VTRIP.
EEPROM operation uses a 2-wire (I²C-compatible) interface with slave address 0xA0–0xA7 (S1/S0 selectable), supports byte and 64-byte page writes with self-timed 5 ms typical write cycles, and enforces write protection via nonvolatile BP2–BP0 bits and volatile WEL/RWEL latches - all coordinated through a single FFFFh control register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - enables direct interface with 3.3 V and 5 V microcontrollers without level shifting. |
| Reset Threshold | Factory-set standard VTRIP; reprogrammable to custom voltage (e.g., 2.7 V, 3.0 V, 3.3 V) using VP = 12–15 V on WP pin - eliminates external resistor networks for precision brownout detection. |
| Watchdog Timeout | Selectable: 200 ms / 600 ms / 1.4 s (via WD1/WD0 bits) - provides deterministic recovery timing for firmware hang detection without software polling overhead. |
| EEPROM Capacity | 128 Kbit (16 K × 8) organized in 64-byte pages - supports robust parameter storage, calibration data, and firmware revision tracking in space-constrained designs. |
| Interface Speed | 400 kHz 2-wire (I²C-compatible) - ensures fast configuration reads/writes while maintaining noise immunity in mixed-signal environments. |
| Standby Current | <20 µA max (watchdog enabled); <1 µA (watchdog disabled) - extends battery life in always-on or low-power wake-up applications. |
| Reset Assertion | Valid down to VCC = 1 V - guarantees safe system halt during deep brownout, preventing corrupted EEPROM writes or processor lockup. |
Pinout & Package
Package: 8-pin SOIC (JEDEC MS-012, 150 mil width), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0 | Device Select Input | LSB of 2-bit hardware address; sets bits [1:0] of slave address (0xA0–0xA7) - enables up to four X4283V8I-2.7A devices on same I²C bus. |
| S1 | Device Select Input | MSB of 2-bit hardware address; combined with S0, defines unique I²C address - avoids address conflicts in multi-supervisor systems. |
| RESET/RESET | Reset Output | Open-drain, active-low/high reset signal; asserted during power-up, brownout, or watchdog timeout - directly drives MCU reset input with external pull-up. |
| VSS | Ground | Digital and analog ground reference - must be connected to system GND plane with low-inductance path for stable reset timing. |
| SDA | Serial Data | Bidirectional I²C data line; open-drain, requires external pull-up - carries all EEPROM read/write commands and status register access. |
| SCL | Serial Clock | Master-generated clock for I²C transactions; synchronizes all data transfers - determines maximum EEPROM throughput (400 kHz = ~40 KB/s theoretical). |
| WP | Write Protect | Hardware enable for Block Lock protection; HIGH + WPEN bit = full hardware write lock - prevents accidental overwrites during field updates or ESD events. |
| VCC | Supply Voltage | Primary power input (2.7–5.5 V); also used as reference for VTRIP programming - must be filtered with ≥0.1 µF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | Custom brownout threshold set via VP pulse on WP pin - replaces discrete resistor-divider networks and improves production yield across voltage tolerances. |
| Block Lock™ Protection | Eight configurable protection segments (64 B to full 16 KB) controlled by nonvolatile BP2–BP0 bits - enables secure storage of bootloader code, encryption keys, or factory calibration data. |
| Watchdog Timer | Three fixed timeout intervals (200/600/1400 ms) selected at power-up or via control register - provides fail-safe recovery without requiring MCU timer peripheral allocation. |
| Power-On Reset Timing | 250 ms minimum reset pulse after VCC > VTRIP - ensures FPGA configuration, oscillator startup, and flash initialization complete before CPU execution begins. |
| EEPROM Page Write | 64-byte atomic page writes with self-timed 5 ms cycle - reduces I²C bus occupancy vs. byte-by-byte writes and minimizes risk of partial writes during power loss. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Real-time monitoring of motor position, pressure sensors, and safety interlocks in programmable logic controllers. IC Role / Device Role / Timing Role: CPU supervisor ensuring clean boot, detecting brownout-induced firmware corruption, and storing runtime fault logs in EEPROM. Use Value: Prevents unsafe actuation during undervoltage; retains critical error history across power cycles without external backup capacitors. | Use Scenario: Battery-powered infusion device delivering precise drug dosages under strict regulatory compliance (IEC 62304). IC Role / Device Role / Timing Role: Dual-role supervisor: resets MCU on battery sag below 2.7 V and triggers watchdog if dose calculation loop hangs. Use Value: Meets Class C software safety requirements by guaranteeing deterministic reset behavior and tamper-resistant storage of calibration constants. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Centralized control of door locks, lighting, and window motors in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Voltage supervisor with adjustable VTRIP tuned to 2.9 V to tolerate cranking transients while protecting EEPROM from write errors. Use Value: Eliminates need for external reset IC and discrete EEPROM, reducing BOM count and PCB area in ASIL-B compliant modules. | Use Scenario: Revenue-grade meter logging kWh consumption, tariff schedules, and tamper events over 15+ year lifetime. IC Role / Device Role / Timing Role: Nonvolatile memory manager with hardware write lock - stores metrology calibration coefficients and firmware signature keys. Use Value: Block Lock™ prevents unauthorized firmware modification; 128 Kbit capacity accommodates 10+ years of hourly usage logs with CRC integrity checks. |
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 2.93 V reset threshold; no VTRIP programmability; 64 Kbit EEPROM; no watchdog timer | Lacks adjustable brownout detection and watchdog - suitable only for static-voltage systems with separate watchdog IC | Choose when design requires ultra-low quiescent current (0.5 µA) and VTRIP tolerance is ±2% or better. |
| STM8AF6266TCY | 8-bit automotive MCU with 32 Kbyte Flash, 2 Kbyte RAM, and integrated reset/watchdog - no serial EEPROM | Requires external EEPROM for persistent storage; adds firmware development overhead but enables dynamic parameter updates | Prefer when system needs real-time diagnostics, CAN communication, or field-upgradable calibration algorithms. |
Compared with MAX6361KA29+T and STM8AF6266TCY, the X4283V8I-2.7A uniquely combines field-programmable VTRIP, three watchdog timeouts, and 128 Kbit protected EEPROM in one SOIC-8 package - reducing component count and qualification effort for cost-sensitive industrial and medical designs.
Availability
X4283V8I-2.7A is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, smart energy meters, and battery-backed IoT gateways requiring stable component supply across extended product lifecycles.
Supply support for X4283V8I-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
Xicor was a fabless semiconductor company specializing in nonvolatile memory and power management ICs, acquired by Renesas Electronics in 2002. Known for innovation in EEPROM architecture and supervisor reliability.
The X4283V8I-2.7A belongs to Xicor's CPU Supervisor + EEPROM family, designed specifically for embedded systems needing guaranteed boot integrity, brownout resilience, and secure, long-term parameter storage without MCU intervention.
FAQ
What is the factory-default VTRIP setting for the X4283V8I-2.7A?
The X4283V8I-2.7A ships with a standard VTRIP threshold of 2.63 V (±2.5%). This value is nonvolatile and remains stable over temperature and time unless reprogrammed using the VP pulse method described in the datasheet. The "-2.7A" suffix indicates this variant is optimized for 2.7 V nominal operation, but the default trip point is slightly lower to ensure margin during cold-start conditions.
Can the X4283V8I-2.7A watchdog timer be disabled after power-up?
Yes, the X4283V8I-2.7A watchdog timer can be disabled after power-up by writing WD1=1 and WD0=1 to the control register at address FFFFh. This requires first setting the WEL and RWEL bits via the three-step sequence (02h → 06h → 03h). Once disabled, the watchdog remains off until next power cycle or explicit re-enablement - no hardware pin controls this function.
Does the X4283V8I-2.7A support standard I²C addressing and ACK polling?
Yes, the X4283V8I-2.7A uses standard 7-bit I²C addressing (0xA0–0xA7 based on S0/S1 pins) and fully supports ACK polling during EEPROM write cycles. After issuing a STOP to initiate a write, the host can immediately send a START + slave address; absence of ACK confirms ongoing internal write, while ACK indicates completion - enabling precise timing control without fixed delays.
How does hardware write protection work on the X4283V8I-2.7A?
Hardware write protection on the X4283V8I-2.7A requires both the WP pin HIGH and the WPEN bit (bit 7 of control register) set to 1. When both conditions are met, all EEPROM writes - including control register modifications - are blocked. Unlike software-only protection, this cannot be overridden by firmware commands, making it ideal for safeguarding bootloader sectors or cryptographic keys against malware or errant code.
Is the X4283V8I-2.7A pin-compatible with the X4285 series?
Yes, the X4283V8I-2.7A is pin-compatible with the X4285 series in SOIC-8 and TSSOP-8 packages. Both share identical pinout, electrical characteristics, and command structure. The primary difference is reset polarity: X4283 outputs active-low RESET, while X4285 outputs active-high RESET. Designers may substitute either part with appropriate MCU reset input configuration.
X4283V8I-2.7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- -
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
X4283V8I-2.7A FAQ
1.How can I place an order for X4283V8I-2.7A through Aetrix?
Please submit a Request for Quotation (RFQ) for X4283V8I-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 X4283V8I-2.7A reliable?
The price and inventory of X4283V8I-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 X4283V8I-2.7A is usually 5 days.
3.What payment methods are accepted for X4283V8I-2.7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4283V8I-2.7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4283V8I-2.7A?
X4283V8I-2.7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4283V8I-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 X4283V8I-2.7A?
For technical support, including X4283V8I-2.7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4283V8I-2.7A requirements.
6.How does Aetrix verify that X4283V8I-2.7A is sourced from the original manufacturer or authorized distributors?
All X4283V8I-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 X4283V8I-2.7A meets industry standards.
7.What is the process for return or replacement of X4283V8I-2.7A?
All X4283V8I-2.7A units undergo pre-shipment inspection (PSI). If there is an issue with X4283V8I-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 X4283V8I-2.7A part is unused and in its original packaging.
Return procedure for X4283V8I-2.7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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