My Inquiry
My Account
Renesas X4283S8I-2.7
- Part No.:
- X4283S8I-2.7
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X4283S8I-2.7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,028
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
X4283S8I-2.7 from Xicor (now part of Renesas) is a 16K × 8-bit CPU supervisor IC integrating power-on reset control, selectable watchdog timer, low-VCC detection, and 128 Kbit serial EEPROM with Block Lock™ protection. It operates from 2.7V to 5.5V, asserts RESET/RESET down to VCC = 1V, and features 400 kHz 2-wire interface - used in embedded microcontroller systems requiring reliable boot sequencing and nonvolatile configuration storage.
For engineers reviewing the X4283S8I-2.7 datasheet, X4283S8I-2.7 pinout, X4283S8I-2.7 application, or X4283S8I-2.7 equivalent, key selection criteria include reset threshold adjustability, watchdog timeout configurability (200 ms / 600 ms / 1.4 s), EEPROM page-write capability (64-byte pages), hardware write protection via WP pin, and SOIC-8 packaging compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The X4283S8I-2.7 implements a dual-function architecture: analog voltage monitoring circuitry drives active-low/high open-drain RESET/RESET output based on programmable VTRIP, while a digital 2-wire slave interface handles EEPROM read/write and control register access. Its watchdog timer monitors SDA transitions during SCL HIGH to detect MCU lockup.
Reset assertion persists for 250 ms after VCC stabilizes above VTRIP; the device supports reprogramming of VTRIP using 12–15 V on WP with specific byte sequences. EEPROM organization is 16,384 × 8 bits, internally segmented into 64-byte pages, with nonvolatile Block Protect bits (BP2–BP0) enabling selective locking of 64–16K byte regions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V - enables direct interface with 3.3V and 5V logic systems without level shifting. |
| Reset Threshold | Factory-set standard VTRIP (e.g., 2.63V), reprogrammable to custom voltage - allows precise brownout detection matching system rail tolerance. |
| Watchdog Timeout | Selectable: 200 ms / 600 ms / 1.4 s (via WD1/WD0 bits) - provides flexible fail-safe timing for diverse MCU execution cycles. |
| EEPROM Capacity | 128 Kbit (16K × 8) organized in 64-byte pages - supports efficient firmware parameter storage and calibration data logging. |
| Interface Speed | 400 kHz 2-wire (I²C-compatible) - ensures fast configuration reads/writes without overloading standard microcontroller I²C peripherals. |
| Standby Current | <20 µA (watchdog enabled) or <1 µA (watchdog disabled) - minimizes battery drain in always-on monitoring applications. |
| Reset Output | Open-drain RESET/RESET, valid down to VCC = 1V - guarantees deterministic reset behavior during deep brownout or power ramp-up. |
Pinout & Package
Package: 8-lead SOIC (JEDEC MS-012, 150 mil width), RoHS-compliant, industrial temperature grade (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOIC) | S0 | Device select input - sets LSB of 7-bit I²C slave address (A0 = 1010xxx); enables up to 4 devices on same bus. |
| 2 (SOIC) | S1 | Device select input - sets MSB of I²C slave address; combined with S0, defines unique device ID. |
| 3 (SOIC) | RESET/RESET | Active-low/high open-drain reset output - asserts during power-up, brownout, or watchdog timeout; requires external pull-up. |
| 4 (SOIC) | VSS | Ground reference - common return path for all internal circuits and I²C interface. |
| 5 (SOIC) | SDA | Serial data bidirectional I/O - carries command, address, and data; open-drain structure enables wired-AND bus sharing. |
| 6 (SOIC) | SCL | Serial clock input - synchronous timing signal generated by master; controls all data transfers. |
| 7 (SOIC) | WP | Write protect input - when HIGH and WPEN bit set, disables all EEPROM writes including control register updates. |
| 8 (SOIC) | VCC | Positive supply input - powers all analog supervision and digital EEPROM functions; also used as reference for VTRIP programming. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Reset Threshold | VTRIP can be reprogrammed to custom voltage (e.g., 2.93V or 3.08V) using 12–15 V on WP - eliminates need for external resistor dividers or precision references. |
| Configurable Watchdog Timer | Three fixed timeout options (200 ms / 600 ms / 1.4 s) stored in nonvolatile control register - survives power cycles and enables robust MCU recovery without firmware dependency. |
| Block Lock™ EEPROM Protection | Eight protection modes (none, 64B–16KB, upper 1/4/1/2, full array) controlled by BP2–BP0 bits - prevents accidental overwrite of critical bootloader or calibration data. |
| Hardware Write Protection | WP pin + WPEN bit enable/disable global write blocking - provides tamper-resistant safeguard independent of software state or power glitches. |
| Power-Up Reset Timing | RESET/RESET held active for ≥250 ms after VCC exceeds VTRIP - ensures sufficient time for oscillator stabilization and FPGA configuration before MCU execution. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
|
Use Scenario: Microcontroller-based PLC unit must initialize reliably after AC power restoration and retain calibrated I/O scaling factors across power loss. IC Role / Device Role / Timing Role: X4283S8I-2.7 provides power-on reset, brownout detection, and nonvolatile storage for calibration coefficients and runtime counters. Use Value: Ensures deterministic boot sequence and preserves critical operational parameters without external backup capacitors or separate EEPROM. |
Use Scenario: Battery-powered infusion pump requires fail-safe restart after low-battery shutdown and secure storage of dose history and safety limits. IC Role / Device Role / Timing Role: X4283S8I-2.7 monitors VCC during battery discharge, triggers reset below safe operating voltage, and logs delivery events in protected EEPROM pages. Use Value: Prevents unsafe operation during undervoltage and maintains audit-trail integrity even during abrupt power loss. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: BCM must survive load-dump transients and retain window position memory and fault logs after ignition cycling. IC Role / Device Role / Timing Role: X4283S8I-2.7 delivers reset pulse synchronized to 12V rail stabilization and stores configuration in EEPROM with hardware write lock. Use Value: Eliminates need for discrete reset IC + separate EEPROM + protection logic, reducing BOM count and PCB footprint. |
Use Scenario: Utility meter records kWh consumption and tariff schedules across frequent grid interruptions and seasonal temperature swings. IC Role / Device Role / Timing Role: X4283S8I-2.7 asserts reset during brownouts, stores billing data in Block Lock-protected EEPROM pages, and tolerates –40°C to +85°C ambient. Use Value: Guarantees data integrity under harsh environmental conditions and meets IEC 62056 compliance requirements for metering accuracy. |
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; 64Kbit EEPROM; same 8-pin SOIC package. | Lacks adjustable brownout point - suitable only where factory VTRIP matches system requirement. | Choose when design uses standard 2.93V threshold and does not require field calibration of reset point. |
| STM8T142M2U6 | Integrated 32Kbit EEPROM; programmable reset thresholds (2.5V–4.5V); no watchdog timer; 8-pin SOIC. | Missing watchdog function - requires external supervision or MCU-based timeout handling. | Choose when watchdog is managed in firmware and higher EEPROM density is unnecessary. |
Compared with MAX6361KA29+T and STM8T142M2U6, the X4283S8I-2.7 uniquely combines field-programmable VTRIP, three-tier watchdog timeout, and 128Kbit EEPROM in one SOIC-8 package - making it optimal for designs needing adaptive brownout response and robust data retention without layout changes.
Availability
X4283S8I-2.7 is available at Aetrix Electronics and suitable for industrial automation, medical device, automotive body electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for X4283S8I-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
Xicor was a fabless semiconductor company specializing in nonvolatile memory and power management ICs, acquired by Renesas Electronics in 2008. Its legacy products emphasize high-reliability, low-power supervision and EEPROM integration.
The X4283/85 product line was designed for embedded systems requiring consolidated power-on reset, brownout protection, watchdog safety, and secure configuration storage - targeting cost-sensitive, space-constrained applications where discrete solutions increase risk and complexity.
FAQ
What is the operating voltage range for the X4283S8I-2.7?
The X4283S8I-2.7 operates from 2.7V to 5.5V, supporting both 3.3V and 5V microcontroller systems. Its reset output remains valid down to VCC = 1V, ensuring reliable assertion during deep brownout conditions. This wide supply range simplifies design across multiple platform voltages without external regulators.
Can the reset threshold voltage of the X4283S8I-2.7 be customized?
Yes, the X4283S8I-2.7 supports nonvolatile reprogramming of its VTRIP threshold using a defined sequence: apply desired VTRIP to VCC, 12–15V to WP, and issue specific byte commands (A0h, 00h, 01h). This enables field calibration to match exact system rail tolerances - a capability not found in most fixed-threshold supervisors.
How does the watchdog timer in the X4283S8I-2.7 function?
The X4283S8I-2.7 watchdog monitors SDA transitions while SCL is HIGH. A falling edge on SDA resets the timer; absence of such an edge within the selected timeout (200 ms / 600 ms / 1.4 s) triggers RESET/RESET. Timeout is set via nonvolatile WD1/WD0 bits and persists across power cycles - providing autonomous MCU supervision independent of firmware state.
What EEPROM protection mechanisms does the X4283S8I-2.7 provide?
The X4283S8I-2.7 offers layered EEPROM protection: (1) Power-up/down circuitry blocks writes during unstable VCC; (2) Block Lock™ bits (BP2–BP0) lock 64B–16KB segments; (3) Hardware write protect via WP pin + WPEN bit disables all writes globally. These prevent corruption during power loss, accidental firmware updates, or physical tampering.
Is the X4283S8I-2.7 pin-compatible with other members of the X4283/85 family?
Yes, the X4283S8I-2.7 shares identical 8-pin SOIC pinout and 2-wire interface protocol with all X4283/85 variants (e.g., X4283S8I-3.0, X4285S8I-2.7). Differences lie only in factory-set VTRIP voltage and RESET/RESET polarity (X4283 = active-low, X4285 = active-high), allowing drop-in replacement where threshold and polarity match system requirements.
X4283S8I-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X4283S8I-2.7 FAQ
1.How can I place an order for X4283S8I-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X4283S8I-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 X4283S8I-2.7 reliable?
The price and inventory of X4283S8I-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 X4283S8I-2.7 is usually 5 days.
3.What payment methods are accepted for X4283S8I-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4283S8I-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4283S8I-2.7?
X4283S8I-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4283S8I-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 X4283S8I-2.7?
For technical support, including X4283S8I-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4283S8I-2.7 requirements.
6.How does Aetrix verify that X4283S8I-2.7 is sourced from the original manufacturer or authorized distributors?
All X4283S8I-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 X4283S8I-2.7 meets industry standards.
7.What is the process for return or replacement of X4283S8I-2.7?
All X4283S8I-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X4283S8I-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 X4283S8I-2.7 part is unused and in its original packaging.
Return procedure for X4283S8I-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X4283S8I-2.7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
