My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6389XS29D3/GH9T
- Part No.:
- MAX6389XS29D3/GH9T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6389XS29D3/GH9T.pdf
- Description:
- MAX6389 Sc70, Single Low-Voltage
- Quantity:
- Payment:
- Shipping:
Inventory:42,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6389XS29D3/GH9T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.93V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum VCC reset timeout, and auxiliary RESET IN input for dual-voltage monitoring in portable and industrial systems.
For engineers reviewing the MAX6389XS29D3/GH9T datasheet, MAX6389XS29D3/GH9T pinout, MAX6389XS29D3/GH9T application, or MAX6389XS29D3/GH9T equivalent, key selection criteria include reset threshold accuracy, open-drain drive capability, dual-supply monitoring support, and guaranteed reset validity down to VCC = 1V.
Technical Context
The MAX6389XS29D3/GH9T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across -40°C to +125°C and integrates an auxiliary voltage monitor comparing RESET IN to a stable +1.27V internal reference. It features fixed 140ms reset timeout after VCC recovery and supports external resistor-divider configuration for user-defined secondary reset thresholds.
Its open-drain RESET output requires an external pullup and guarantees valid logic state down to VCC = 1V; it sinks ≥80µA at VOL ≤ 0.3V when asserted. The device consumes only 3µA at +1.8V and operates across 1.0V to 5.5V supply range, enabling use in ultra-low-power battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (min 2.85V / nom 2.93V / max 3.00V); enables reliable brownout detection for 3.0V/3.3V systems |
| Reset Timeout | 140ms minimum; ensures µP remains held in reset long enough for stable power rail recovery |
| Supply Current | 3µA at +1.8V; extends battery life in always-on monitoring circuits |
| Operating Voltage | 1.0V to 5.5V; supports operation during deep brownout and compatibility with 1.2V–5V logic domains |
| Threshold Accuracy | ±2.5% over -40°C to +125°C; eliminates need for external calibration in harsh environments |
| RESET Output Type | Open-drain active-low; allows wired-OR configuration and level-shifting with external pullup |
| Auxiliary Input | RESET IN pin referenced to +1.27V; enables independent monitoring of second supply (e.g., I/O or core voltage) |
Pinout & Package
MAX6389XS29D3/GH9T is housed in a RoHS-compliant 4-pin SC70 package (package code X4+1, outline 21-0098) with 0.65mm pitch and 1.3mm × 1.1mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input; powers internal circuitry and serves as primary reset threshold reference |
| 2 | RESET | Open-drain active-low reset output; requires external pullup; asserts low during fault conditions |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to +1.27V internal reference for dual-supply supervision |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply monitoring capability | Simultaneous supervision of VCC and external voltage via RESET IN pin with ±1.5% reference accuracy |
| Negative-going transient immunity | Rejects VCC glitches up to 35µs duration when overdrive is 100mV below threshold, reducing false resets |
| Ultra-low quiescent current | 3µA at +1.8V enables >10-year battery life in coin-cell-powered IoT sensors |
| Guaranteed reset validity | RESET output state remains valid down to VCC = 1V, ensuring deterministic behavior during deep brownout |
| Factory-trimmed precision threshold | 2.93V reset point trimmed at wafer level with no external components required |
Applications
| Battery-Powered Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous ECG monitoring using coin-cell power with strict low-power requirements and dual-rail (core/I/O) voltage supervision. IC Role / Device Role / Timing Role: Supervises both 1.8V core and 3.3V I/O rails; asserts open-drain RESET to halt MCU on either rail collapse. Use Value: 3µA supply current extends battery life beyond 5 years; RESET IN pin enables precise 1.27V-referenced I/O rail monitoring without additional ICs. | Use Scenario: DIN-rail mounted programmable logic controller requiring robust reset under wide temperature (-40°C to +85°C) and noisy 24V DC field power. IC Role / Device Role / Timing Role: Monitors 3.3V logic supply and 5V auxiliary rail; provides 140ms reset hold time to ensure FPGA configuration stability after power recovery. Use Value: ±2.5% threshold accuracy over full industrial temperature range eliminates recalibration; open-drain output interfaces directly with optocoupled reset inputs. |
| Automotive Body Control Modules | Portable Test Equipment |
Use Scenario: Low-voltage reset supervision in 12V automotive subsystems where 3.3V domain must remain stable during cold-crank events. IC Role / Device Role / Timing Role: Detects brownout on 3.3V rail while RESET IN monitors 5V sensor supply; asserts shared reset line to microcontroller and CAN transceiver. Use Value: 140ms timeout exceeds ISO 16750-2 pulse 4b requirement; negative transient immunity prevents spurious resets during load-dump conditions. | Use Scenario: Handheld multimeter with dual batteries (main + backup) and separate analog/digital supplies requiring coordinated reset sequencing. IC Role / Device Role / Timing Role: Uses VCC for main supply monitoring and RESET IN for backup supply validation; open-drain output drives common reset net across mixed-voltage subsystems. Use Value: 4-pin SC70 footprint saves PCB space in compact enclosures; guaranteed operation down to VCC = 1V ensures reset integrity during battery swap transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6389LT29D3/V+T | 6-pin µDFN package (L611+1), same 2.93V threshold and 140ms timeout, automotive-grade (-40°C to +125°C) | Requires larger PCB footprint; rated for AEC-Q100 Grade 3; suitable for under-hood automotive use | Select when automotive qualification or thermal margin beyond commercial grade is required |
| TPS3808G33DBVR | Active-low push-pull output (not open-drain); 3.3V threshold; 200ms timeout; 1.4µA typical ICC | Lacks auxiliary RESET IN input; incompatible with wired-OR reset bus topologies | Select when lower supply current is critical and open-drain functionality is not needed |
Compared with MAX6389XS29D3/GH9T, the MAX6389LT29D3/V+T offers identical electrical performance in a larger, automotive-qualified package, while the TPS3808G33DBVR reduces supply current but sacrifices dual-supply monitoring and open-drain flexibility-making MAX6389XS29D3/GH9T optimal for space-constrained, dual-rail designs requiring wired-OR reset architecture.
Availability
MAX6389XS29D3/GH9T is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial PLC I/O modules, automotive body control units, and portable test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6389XS29D3/GH9T 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 power, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy reset supervision for microprocessor-based systems operating across wide voltage and temperature ranges, with emphasis on reliability in portable and harsh-environment applications.
FAQ
What is the exact reset threshold voltage of MAX6389XS29D3/GH9T and how is it specified?
The MAX6389XS29D3/GH9T has a factory-set nominal reset threshold of 2.93V, with minimum 2.85V and maximum 3.00V over the full operating temperature range (-40°C to +125°C). This ±2.5% tolerance is guaranteed by design and applies to all units without binning or external adjustment. The threshold is internally trimmed and referenced to a stable bandgap, eliminating need for external resistors or calibration in MAX6389XS29D3/GH9T applications.
Does MAX6389XS29D3/GH9T support monitoring of two independent power rails?
Yes, MAX6389XS29D3/GH9T supports dual-rail monitoring: VCC is monitored against its 2.93V factory-set threshold, and the RESET IN pin monitors a second voltage against an internal +1.27V reference. By connecting an external resistor divider to RESET IN, users can configure a custom threshold for the auxiliary rail. Reset asserts if either VCC falls below 2.93V or the voltage at RESET IN drops below +1.27V, making MAX6389XS29D3/GH9T ideal for systems with separate core and I/O supplies.
What is the function and electrical behavior of the RESET output on MAX6389XS29D3/GH9T?
The RESET output of MAX6389XS29D3/GH9T is an open-drain, active-low signal. When asserted (low), it sinks ≥80µA with VOL ≤ 0.3V at VCC ≥ 1.0V; when deasserted (high), it presents high impedance and requires an external pullup resistor. This topology enables wired-OR connection of multiple reset sources and level shifting across voltage domains-key advantages absent in push-pull alternatives. The output remains valid down to VCC = 1V, ensuring deterministic behavior during deep brownout conditions in MAX6389XS29D3/GH9T deployments.
How does the 140ms reset timeout period of MAX6389XS29D3/GH9T impact system reliability?
The 140ms minimum reset timeout of MAX6389XS29D3/GH9T ensures the microprocessor remains held in reset long enough for all power rails to stabilize and internal clocks to lock after a brownout or power-up event. This exceeds typical requirements for 3.3V systems (often 100ms) and aligns with industrial standards like IEC 61000-4-11 for immunity to short interruptions. The timeout is internally generated and temperature-compensated, maintaining ±10% variation over -40°C to +125°C-directly enhancing system boot reliability in MAX6389XS29D3/GH9T-based designs.
Is MAX6389XS29D3/GH9T compatible with lead-free PCB assembly processes?
Yes, MAX6389XS29D3/GH9T carries a "+" suffix in its package code (X4+1), indicating full RoHS compliance and suitability for lead-free reflow soldering per JEDEC J-STD-020. Its SC70 package is rated for peak reflow temperatures up to +260°C, matching standard Pb-free process profiles. The device undergoes rigorous qualification per AEC-Q200 for moisture sensitivity (MSL1), ensuring robust performance in automated assembly lines handling MAX6389XS29D3/GH9T without popcorn or delamination risks.
MAX6389XS29D3/GH9T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 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:
- SC70-4
MAX6389XS29D3/GH9T FAQ
1.How can I place an order for MAX6389XS29D3/GH9T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6389XS29D3/GH9T 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 MAX6389XS29D3/GH9T reliable?
The price and inventory of MAX6389XS29D3/GH9T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6389XS29D3/GH9T is usually 5 days.
3.What payment methods are accepted for MAX6389XS29D3/GH9T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6389XS29D3/GH9T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6389XS29D3/GH9T?
MAX6389XS29D3/GH9T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6389XS29D3/GH9T 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 MAX6389XS29D3/GH9T?
For technical support, including MAX6389XS29D3/GH9T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6389XS29D3/GH9T requirements.
6.How does Aetrix verify that MAX6389XS29D3/GH9T is sourced from the original manufacturer or authorized distributors?
All MAX6389XS29D3/GH9T 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 MAX6389XS29D3/GH9T meets industry standards.
7.What is the process for return or replacement of MAX6389XS29D3/GH9T?
All MAX6389XS29D3/GH9T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6389XS29D3/GH9T, 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 MAX6389XS29D3/GH9T part is unused and in its original packaging.
Return procedure for MAX6389XS29D3/GH9T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6389XS29D3/GH9T 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…
