My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6389XS23D3+T
- Part No.:
- MAX6389XS23D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6389XS23D3+T.pdf
- Description:
- IC MPU/RESET CIRC 2.31V SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,144
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6389XS23D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.31V VCC reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring in battery-powered embedded systems.
For engineers reviewing the MAX6389XS23D3+T datasheet, MAX6389XS23D3+T pinout, MAX6389XS23D3+T application, or MAX6389XS23D3+T equivalent, this page delivers verified electrical specs, SC70-4 package layout, dual-supply monitoring capability, reset timing accuracy, and automotive-grade AEC-Q100 qualification details.
Technical Context
The MAX6389XS23D3+T integrates a precision voltage comparator for VCC monitoring and a separate +1.27V reference-based comparator for the RESET IN pin, enabling independent detection of two supply rails. Its internal timer guarantees a minimum 140ms reset assertion after VCC recovery or RESET IN release.
It operates across 1.0V–5.5V supply range with only 3μA current at 1.8V, and ensures valid reset state down to VCC = 1V. The open-drain RESET output requires an external pullup and supports sink currents up to 3.2mA at VCC ≥ 4.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.31V nominal (suffix "23"), ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| Reset Timeout Period | 140ms minimum (suffix "D3") - holds processor in reset long enough for power stabilization and clock lock |
| Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration and level translation with external pullup |
| Auxiliary Input | RESET IN pin with 1.27V internal reference - monitors second voltage rail (e.g., I/O supply) via resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| Reset Propagation Delay | 4.5µs from RESET IN falling edge to RESET assertion - enables fast response to secondary supply faults |
Pinout & Package
MAX6389XS23D3+T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, optimized for space-constrained portable designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary reset threshold monitor - powers device and triggers reset when below 2.31V |
| 2 | RESET | Open-drain active-low reset output - requires external pullup; sinks up to 3.2mA; asserts during VCC or RESET IN fault |
| 3 | GND | Analog/digital ground reference - must be low-impedance connection to minimize noise-induced false resets |
| 4 | RESET IN | Auxiliary voltage monitor input - compared to internal 1.27V reference; enables dual-rail supervision without external comparators |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset channels | VCC and RESET IN inputs monitored separately - eliminates need for discrete comparators in dual-supply systems |
| Factory-trimmed threshold accuracy | ±2.5% over full -40°C to +125°C range - reduces calibration overhead in automotive and industrial applications |
| Negative-going transient immunity | Rejects VCC glitches < 35µs at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on monitoring nodes beyond 10 years |
| AEC-Q100 qualified | Rated for automotive Grade 2 (-40°C to +105°C ambient) per ordering code "/V" - supports under-hood and infotainment use |
Applications
| Battery-Powered Telematics Unit | Dual-Rail Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors both 3.3V MCU core supply and 5V CAN transceiver supply in vehicle tracking hardware operating on 12V battery with wide voltage swings. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting shared reset line when either rail drops below threshold; 140ms timeout ensures stable boot after cold-crank recovery. Use Value: Prevents CAN bus arbitration errors and MCU lockup during engine start by guaranteeing synchronized reset across subsystems. |
Use Scenario: Supervises 24V field-side I/O supply and 3.3V logic supply in programmable logic controller modules exposed to industrial EMI. IC Role / Device Role / Timing Role: RESET IN monitors isolated 24V rail via resistor divider while VCC tracks 3.3V logic; open-drain output interfaces directly with 3.3V FPGA reset input. Use Value: Eliminates need for optocoupled reset isolation and reduces BOM count by integrating dual-channel supervision in 2mm² footprint. |
| Portable Medical Sensor Hub | Automotive Body Control Module |
Use Scenario: Powers ultra-low-power BLE sensor aggregator using CR2032 coin cell; must supervise both 1.8V MCU and 3.0V analog front-end. IC Role / Device Role / Timing Role: RESET IN configured for 3.0V rail; VCC set to 1.8V; 3μA supply current minimizes standby drain. Use Value: Enables >5-year shelf life and reliable wake-from-sleep sequencing without external reset ICs or firmware intervention. |
Use Scenario: Controls door module functions including window lift, mirror fold, and interior lighting - subject to load-dump and jump-start transients. IC Role / Device Role / Timing Role: AEC-Q100 qualified MAX6389XS23D3+T provides VCC supervision and RESET IN monitoring of 5V LIN bus supply; 140ms timeout meets ISO 16750-2 cold-crank recovery requirements. Use Value: Ensures deterministic MCU restart after battery disconnect/reconnect events without requiring software watchdog recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6389LT23D3+T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70 - larger footprint, better thermal dissipation | Preferred for high-reliability industrial PCBs requiring enhanced thermal margin and IPC Class 3 solder joint robustness | Select when board layout allows 2.5mm × 2.5mm area and thermal performance outweighs size constraints |
| TLV809E23DBVR | Single-channel, no RESET IN pin; 2.32V threshold; 140ms timeout; 0.5μA typical ICC - lower power but no dual-monitoring capability | Suitable only for single-rail systems where auxiliary monitoring is handled externally or not required | Choose only if design uses only one supply rail and ultra-low ICC (<1μA) is critical - sacrifices dual-supply functionality |
Compared with MAX6389XS23D3+T, the μDFN variant offers superior thermal resistance (θJA = 477°C/W vs. 322.6°C/W) for high-ambient environments, while TLV809E23DBVR reduces supply current by 83% but removes the RESET IN function entirely - making it unsuitable for dual-voltage supervision.
Availability
MAX6389XS23D3+T is available at Aetrix Electronics and suitable for battery-powered telematics, dual-rail industrial PLCs, portable medical sensors, and automotive body control modules requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for MAX6389XS23D3+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and computing applications, emphasizing low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset circuits targeting space- and power-constrained embedded systems requiring guaranteed reset behavior across extreme temperatures.
FAQ
What is the exact reset threshold voltage of MAX6389XS23D3+T?
The MAX6389XS23D3+T has a factory-set VCC reset threshold of 2.31V nominal, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed by the "23" suffix in the part number and specified in the Reset Thresholds table of the datasheet. The MAX6389XS23D3+T uses this precise threshold to initiate reset when the main supply falls below 2.31V.
Does MAX6389XS23D3+T support monitoring of two independent voltage rails?
Yes, the MAX6389XS23D3+T supports dual-rail monitoring via its dedicated RESET IN pin, which compares an external voltage against an internal 1.27V reference. When either VCC drops below 2.31V or the voltage at RESET IN falls below 1.27V, the open-drain RESET output asserts. This dual-input capability is intrinsic to the MAX6389XS23D3+T and eliminates the need for additional supervisory ICs in systems with multiple supply domains.
What package type and dimensions does MAX6389XS23D3+T use?
The MAX6389XS23D3+T is packaged in a 4-pin SC70 (SOT-323) outline with package code X4+1, measuring 2.0mm × 2.1mm × 0.95mm. It features RoHS-compliant lead-free terminations ("+" suffix) and is rated for operation from -40°C to +125°C. This compact footprint makes the MAX6389XS23D3+T ideal for space-constrained portable and automotive applications where board area is at a premium.
Is MAX6389XS23D3+T qualified for automotive applications?
Yes, the MAX6389XS23D3+T is AEC-Q100 qualified for automotive use, as indicated by its "/V" option in the ordering information and explicit mention in the Features section. While the base part number MAX6389XS23D3+T itself carries the "+" RoHS suffix, automotive qualification requires the "/V" variant (e.g., MAX6389XS23D3/V+T), which undergoes stress testing per AEC-Q100 Grade 2 standards (-40°C to +105°C ambient).
What is the minimum reset timeout period for MAX6389XS23D3+T?
The MAX6389XS23D3+T provides a minimum reset timeout period of 140ms, denoted by the "D3" suffix in the part number. This guaranteed minimum duration ensures the microprocessor remains held in reset long enough for power supplies to stabilize and clocks to lock after a brownout or power-up event. The actual timeout may extend slightly due to process variation, but will never fall below 140ms across temperature and voltage ranges.
MAX6389XS23D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.31V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6389XS23D3+T FAQ
1.How can I place an order for MAX6389XS23D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6389XS23D3+T 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 MAX6389XS23D3+T reliable?
The price and inventory of MAX6389XS23D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6389XS23D3+T is usually 5 days.
3.What payment methods are accepted for MAX6389XS23D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6389XS23D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6389XS23D3+T?
MAX6389XS23D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6389XS23D3+T 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 MAX6389XS23D3+T?
For technical support, including MAX6389XS23D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6389XS23D3+T requirements.
6.How does Aetrix verify that MAX6389XS23D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6389XS23D3+T 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 MAX6389XS23D3+T meets industry standards.
7.What is the process for return or replacement of MAX6389XS23D3+T?
All MAX6389XS23D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6389XS23D3+T, 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 MAX6389XS23D3+T part is unused and in its original packaging.
Return procedure for MAX6389XS23D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6389XS23D3+T 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
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
