My Inquiry
My Account
Renesas X4043S8Z-2.7T1
- Part No.:
- X4043S8Z-2.7T1
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X4043S8Z-2.7T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,775
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
X4043S8Z-2.7T1 from Intersil (now Renesas) is a CPU supervisor IC integrating power-on reset control, watchdog timer, supply voltage supervision, and 4kbit serial EEPROM in an 8-pin SOIC package. It features active-low open-drain RESET output, 2.7V–5.5V operation, 2.55V–2.7V reset threshold, <1µA standby current (watchdog off), and 400kHz I²C interface - deployed in industrial microcontroller systems requiring reliable brownout protection and nonvolatile configuration storage.
For engineers reviewing the X4043S8Z-2.7T1 datasheet, X4043S8Z-2.7T1 pinout, X4043S8Z-2.7T1 application, or X4043S8Z-2.7T1 equivalent, key selection criteria include confirmed VTRIP range (2.55–2.7V), EEPROM block-lock protection granularity, watchdog timeout options (200ms/600ms/1.4s), I²C address compatibility (0xA0), and SOIC-8 thermal and layout constraints.
Technical Context
The X4043S8Z-2.7T1 implements a dual-function reset architecture: power-on reset with 250ms delay and low-VCC detection asserting RESET below 2.7V (with 200ms hysteresis). Its watchdog timer monitors SDA/SCL activity and triggers reset if no valid I²C transaction occurs within the selected timeout period.
Internally, it combines a CMOS serial EEPROM array organized as 512 × 8 bits with Intersil's Block Lock™ protection and Direct Write™ memory cells (1M write cycles, 100-year retention). The control register at address 1FFh (accessed via 1011 preamble) configures nonvolatile WD1/WD0 and BP2/BP1/BP0 bits, while WEL/RWEL latches manage volatile write enable states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTRIP) | 2.55V to 2.7V - ensures system reset before microcontroller enters undefined operation during brownout in 2.7V–5.5V supply rails. |
| Supply Voltage Range | 2.7V to 5.5V - supports single-supply operation across 3.3V and 5V logic domains without level-shifting. |
| Standby Current (WD off) | <1µA - enables ultra-low-power operation in battery-backed or energy-harvesting embedded systems. |
| I²C Interface Speed | 400kHz - compatible with standard Fast-mode I²C buses, allowing real-time configuration updates without bus contention. |
| EEPROM Capacity | 4kbits (512 × 8) - provides sufficient space for firmware version stamps, calibration data, and device-specific parameters in compact MCU designs. |
| Watchdog Timeout Options | 200ms / 600ms / 1.4s - selectable via nonvolatile WD1/WD0 bits, enabling precise fault-detection timing aligned with application boot or task deadlines. |
| Reset Output Type | Active-low open-drain - allows wired-OR connection with other reset sources and flexible pull-up voltage selection (e.g., to 3.3V or 5V rail). |
Pinout & Package
Package: 8-pin SOIC (JEDEC MS-012, 150 mil width), RoHS-compliant Pb-free plus anneal finish, MSL Level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | No Connect (NC) | Unbonded die pads - must remain floating; no PCB trace or component connection permitted. |
| 3 | RESET | Active-low open-drain reset output - asserts during power-up, brownout (VCC < 2.7V), or watchdog timeout; requires external pull-up resistor. |
| 4 | VSS | Digital ground reference - must be connected to system ground plane with low-inductance path to minimize noise coupling into reset logic. |
| 5 | SDA | Bidirectional I²C data line - open-drain structure mandates external pull-up; shares bus with other I²C slaves using 7-bit address 0xA0. |
| 6 | SCL | I²C clock input - driven by master only; rise/fall time compliance required for 400kHz operation (max 300ns fall, 1000ns rise). |
| 7 | WP | Hardware write protect - HIGH disables all EEPROM writes and control register modifications; tied to VSS when unused. |
| 8 | VCC | Primary power supply input - supplies both supervisor logic and EEPROM core; decoupling capacitor (0.1µF ceramic) required within 5mm. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable VTRIP | VTRIP can be reprogrammed to custom thresholds (down to 1.7V nominal) using 15–18V pulse on WP pin - enables precision brownout tuning without external components. |
| Block Lock™ Protection | Eight configurable lock modes (0–128 bytes, 1/4–full array) controlled by nonvolatile BP2/BP1/BP0 bits - prevents accidental overwrites of critical calibration or security data. |
| Self-timed EEPROM Writes | 5ms typical write cycle with automatic internal timing - eliminates need for host-side delay loops or status polling overhead in firmware. |
| Power-up Reset Hold Time | 250ms minimum assertion - guarantees stable VCC and oscillator startup before processor release, preventing race conditions in FPGA-configured systems. |
| Watchdog Independence | Timer resets only on valid I²C start/stop sequences (not arbitrary SDA/SCL toggling) - avoids false triggers from bus noise or partial transactions. |
Applications
| Industrial PLC I/O Module | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Monitors 3.3V supply rail in a DIN-rail mounted PLC I/O module operating in factory environments with fluctuating line voltage. IC Role / Device Role / Timing Role: CPU supervisor providing brownout reset, watchdog supervision of main MCU, and EEPROM storage for channel calibration coefficients. Use Value: Prevents spurious relay actuation during voltage sags by asserting RESET below 2.7V; stores recalibrated sensor offsets with 1M-cycle endurance for field maintenance longevity. |
Use Scenario: Embedded in a battery-powered infusion pump that must retain dose history and motor calibration after repeated power cycling. IC Role / Device Role / Timing Role: Dual-role device: ensures safe MCU reset during Li-ion battery discharge (2.7V cutoff), and retains audit logs in EEPROM with hardware block lock. Use Value: Guarantees fail-safe shutdown before battery undervoltage causes motor stall; protects last 128 bytes of EEPROM (dose records) from overwrite via BP2/BP1/BP0 configuration. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
Use Scenario: Used in a Class 0.5S electricity meter where accurate timekeeping and tamper-resistant parameter storage are mandated. IC Role / Device Role / Timing Role: Supervises 5V auxiliary rail powering metrology ASIC; stores tariff tables and firmware revision in EEPROM with write-protection. Use Value: Maintains reset validity down to VCC = 1V - ensures clean restart even during severe AC line dips; 100-year data retention meets utility-grade archival requirements. |
Use Scenario: Integrated into a 12V automotive BCM managing door locks, lighting, and window motors under wide-temperature (-40°C to +85°C) conditions. IC Role / Device Role / Timing Role: Provides cold-crank reset hold (250ms) and watchdog supervision of LIN-connected microcontrollers. Use Value: Prevents erratic behavior during engine cranking (battery dip to ~6V) by holding RESET until stable 12V rail recovery; SOIC-8 package meets AEC-Q200 thermal cycling requirements. |
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 |
|---|---|---|---|
| MAX6361KA27+T | Fixed 2.63V reset threshold (no programmability); 1kbit EEPROM; 100kHz I²C only | Lacks VTRIP adjustment and higher-speed I²C - unsuitable where fine brownout tuning or fast configuration updates are required | Select only if cost sensitivity outweighs flexibility needs and 1kbit EEPROM suffices for minimal configuration storage |
| STM8AF5288TDY | Integrated 8-bit MCU + 4k EEPROM + reset/watchdog - not a standalone supervisor; requires firmware development | Replaces discrete supervisor + MCU architecture - increases BOM count but reduces board area and interconnect complexity | Choose when system-level consolidation justifies added software validation effort and MCU resource allocation |
Compared with MAX6361KA27+T and STM8AF5288TDY, the X4043S8Z-2.7T1 uniquely balances pin-compatible simplicity, field-programmable VTRIP, and full-speed I²C EEPROM access - making it optimal for retrofitting legacy 3.3V systems needing enhanced brownout resilience without redesigning firmware or layout.
Availability
X4043S8Z-2.7T1 is available at Aetrix Electronics and suitable for industrial automation, medical device manufacturing, smart metering, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for X4043S8Z-2.7T1 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 Corporation, now part of Renesas Electronics, designs high-performance analog and power management ICs for industrial, communications, and computing applications.
The X4043S8Z-2.7T1 belongs to Intersil's CPU Supervisor family, engineered to consolidate reset, watchdog, voltage monitoring, and nonvolatile storage functions - reducing system-level component count and improving reliability in space-constrained embedded controllers.
FAQ
What is the exact reset threshold voltage range for X4043S8Z-2.7T1?
The X4043S8Z-2.7T1 has a factory-set VTRIP range of 2.55V to 2.7V, specified for operation across 0°C to 70°C ambient temperature. This threshold is programmable to custom values using a 15–18V pulse on the WP pin, with post-programming verification performed by ramping VCC and measuring the actual RESET assertion point.
Does X4043S8Z-2.7T1 support I²C clock stretching or multi-master arbitration?
No - the X4043S8Z-2.7T1 operates strictly as an I²C slave with fixed 7-bit address 0xA0 (write) / 0xA1 (read) and does not implement clock stretching or arbitration logic. It responds to START/STOP conditions and acknowledges valid addresses but cannot hold SCL low or resolve bus contention.
Can the watchdog timer in X4043S8Z-2.7T1 be disabled permanently?
Yes - the watchdog timer in X4043S8Z-2.7T1 is disabled by default (WD1=1, WD0=1) and remains disabled until explicitly reconfigured via the nonvolatile control register at address 1FFh. Once set, the configuration persists across power cycles unless rewritten.
Is X4043S8Z-2.7T1 pin-compatible with X4043S8Z-4.5T1?
Yes - both X4043S8Z-2.7T1 and X4043S8Z-4.5T1 use identical 8-pin SOIC packaging and share identical pinout, electrical interface, and functional architecture. The sole difference is the factory-programmed VTRIP range (2.55–2.7V vs. 4.5–4.75V), making them direct drop-in replacements in matching supply-voltage contexts.
What EEPROM write protection mechanisms does X4043S8Z-2.7T1 provide beyond the WP pin?
In addition to the hardware WP pin, the X4043S8Z-2.7T1 implements software-configurable Block Lock™ protection via nonvolatile BP2/BP1/BP0 bits. These bits enable eight distinct lock modes - including protection of the first 16/32/64/128 bytes or upper 1/4/1/2/all of the 512-byte array - providing layered defense against inadvertent writes during firmware updates or field service.
X4043S8Z-2.7T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X4043S8Z-2.7T1 FAQ
1.How can I place an order for X4043S8Z-2.7T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X4043S8Z-2.7T1 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 X4043S8Z-2.7T1 reliable?
The price and inventory of X4043S8Z-2.7T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X4043S8Z-2.7T1 is usually 5 days.
3.What payment methods are accepted for X4043S8Z-2.7T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X4043S8Z-2.7T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X4043S8Z-2.7T1?
X4043S8Z-2.7T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X4043S8Z-2.7T1 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 X4043S8Z-2.7T1?
For technical support, including X4043S8Z-2.7T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X4043S8Z-2.7T1 requirements.
6.How does Aetrix verify that X4043S8Z-2.7T1 is sourced from the original manufacturer or authorized distributors?
All X4043S8Z-2.7T1 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 X4043S8Z-2.7T1 meets industry standards.
7.What is the process for return or replacement of X4043S8Z-2.7T1?
All X4043S8Z-2.7T1 units undergo pre-shipment inspection (PSI). If there is an issue with X4043S8Z-2.7T1, 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 X4043S8Z-2.7T1 part is unused and in its original packaging.
Return procedure for X4043S8Z-2.7T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X4043S8Z-2.7T1 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…
