My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6389XS22D1+T
- Part No.:
- MAX6389XS22D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6389XS22D1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6389XS22D1+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 2.19V VCC reset threshold (±2.5% over -40°C to +125°C), 1ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring in battery-powered embedded systems.
For engineers reviewing the MAX6389XS22D1+T datasheet, MAX6389XS22D1+T pinout, MAX6389XS22D1+T application, or MAX6389XS22D1+T equivalent, key selection criteria include its 2.19V threshold accuracy, 1ms reset delay, open-drain output requiring external pullup, RESET IN comparator referenced to +1.27V, and guaranteed operation down to VCC = 1V.
Technical Context
The MAX6389XS22D1+T implements a precision bandgap-based voltage monitor for VCC and a separate high-impedance comparator for the RESET IN pin, both feeding into a digital timeout state machine. Its reset assertion logic responds to either VCC falling below 2.19V or RESET IN falling below 1.27V, with independent glitch rejection on both inputs.
It uses BiCMOS process technology to achieve 3μA supply current at 1.8V while maintaining ±2.5% threshold accuracy across automotive temperature range (-40°C to +125°C) and guarantees valid reset output state down to VCC = 1V - critical for brownout detection in ultra-low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V (nominal), ±2.5% over -40°C to +125°C - ensures reliable power-fail detection across automotive temperature range |
| RESET Timeout Period | 1ms (minimum) - provides fast system recovery after brief undervoltage events |
| RESET Output Type | Open-drain active-low - requires external pullup resistor; enables wired-OR reset bus configuration |
| RESET IN Threshold | +1.27V (±2.5% over temp) - allows user-defined secondary voltage monitoring via resistor divider |
| Supply Current | 3μA at +1.8V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V–5V rail systems |
| Reset Assertion Delay | 35μs (VCC falling at 10mV/µs) - rejects sub-35μs transients without false triggering |
Pinout & Package
MAX6389XS22D1+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, with thermal resistance θJA = 322.6°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor input; powers internal circuitry and sets reset threshold reference |
| 2 | RESET (open-drain) | Active-low reset output requiring external pullup; asserts low when VCC < 2.19V or RESET IN < 1.27V |
| 3 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 4 | RESET IN | Auxiliary high-impedance input monitored against +1.27V reference; enables dual-rail supervision (e.g., core + I/O voltage) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision capability | Simultaneous monitoring of VCC (2.19V threshold) and external rail via RESET IN (1.27V reference), enabling robust power sequencing in multi-rail SoC systems |
| Negative-going VCC transient immunity | Rejects transients ≤35μs duration at 10mV/µs slew rate - prevents spurious resets during switching noise or ESD events |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset behavior during deep brownout conditions where many supervisors fail silently |
| Low quiescent current | 3μA at 1.8V enables integration into always-on subsystems without compromising battery runtime |
| Automotive-grade qualification | AEC-Q100 qualified (per /V variant family); this part uses same die and process as automotive versions, supporting industrial and automotive designs |
Applications
| Battery-Powered Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor operating from coin cell with dual-rail power (1.8V sensor core, 3.3V BLE radio). IC Role / Device Role / Timing Role: Supervises both rails via VCC and RESET IN inputs; asserts reset if either drops below threshold during cold start or battery sag. Use Value: Prevents corrupted sensor readings or BLE transmission failures by ensuring μC only boots when both supplies are stable. | Use Scenario: DIN-rail mounted I/O module with isolated 5V field power and 3.3V logic supply. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail directly on VCC pin and 5V field rail via resistor-divided RESET IN input. Use Value: Enables single-chip dual-supply supervision without external comparators, reducing BOM count and PCB area. |
| Automotive Body Control Units | Portable Test Equipment |
Use Scenario: BCM sub-module powered from vehicle battery (9V–16V) with local 3.3V LDO and 1.2V core regulator. IC Role / Device Role / Timing Role: Uses RESET IN to monitor 1.2V core rail while VCC monitors 3.3V logic rail; triggers reset on first fault detected. Use Value: Meets ASIL-B functional safety requirements for early fault detection before μC initialization completes. | Use Scenario: Handheld oscilloscope with rechargeable Li-ion battery and multiple voltage domains (1.1V FPGA core, 2.5V analog front-end, 3.3V MCU). IC Role / Device Role / Timing Role: Configured with 2.19V VCC threshold and RESET IN tied to 1.1V domain via divider; asserts reset if core voltage collapses. Use Value: Eliminates need for discrete voltage detectors per rail, simplifying design and improving startup reliability under partial discharge conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6389XS22D2+T | Same 2.19V threshold and open-drain output, but 20ms reset timeout instead of 1ms | Suitable for systems requiring longer reset hold time to ensure peripheral initialization completion | Select when longer reset assertion is needed for slow-starting regulators or memory devices |
| MAX6387XS22D1+T | Identical 2.19V threshold, 1ms timeout, and RESET IN input, but push-pull active-low RESET output (no external pullup required) | Eliminates need for external pullup resistor; not compatible with wired-OR reset buses | Choose when board space is constrained and wired-OR is not required |
Compared with MAX6389XS22D1+T, the MAX6389XS22D2+T extends reset hold time for slower peripherals, while the MAX6387XS22D1+T removes external component dependency at the cost of bus-sharing flexibility - both retain identical dual-supply monitoring capability and automotive temperature support.
Availability
MAX6389XS22D1+T 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 long-term lifecycle assurance.
Supply support for MAX6389XS22D1+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 industrial, automotive, communications, and computing applications, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset supervision with ultra-low quiescent current, targeting space-constrained and battery-sensitive embedded systems requiring guaranteed operation across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6389XS22D1+T and how accurate is it over temperature?
The MAX6389XS22D1+T has a factory-set nominal VCC reset threshold of 2.19V, with guaranteed accuracy of ±2.5% over the full operating temperature range of -40°C to +125°C. This specification is validated by design and production-tested per Maxim's datasheet methodology, ensuring reliable brownout detection in automotive and industrial environments where voltage margins are tight.
Does MAX6389XS22D1+T require an external pullup resistor on the RESET pin?
Yes, MAX6389XS22D1+T features an open-drain active-low RESET output, which requires an external pullup resistor to the appropriate logic rail (e.g., 3.3V or 5V). The value is not critical but typically 10kΩ–100kΩ; lower values improve noise immunity and rise time, while higher values reduce power consumption in battery-operated systems.
Can MAX6389XS22D1+T monitor two different supply voltages simultaneously?
Yes, MAX6389XS22D1+T supports dual-voltage supervision: VCC is monitored directly against its 2.19V threshold, while the RESET IN pin monitors a second voltage using an internal +1.27V reference. By connecting a resistor divider to RESET IN, users can set a custom threshold for the auxiliary rail - for example, detecting failure of a 1.2V core supply while supervising a 3.3V I/O rail.
What is the minimum reset timeout period of MAX6389XS22D1+T and how is it implemented?
The MAX6389XS22D1+T has a minimum reset timeout period of 1ms, specified as tRP = D1 in the ordering nomenclature. This timeout is generated by an internal RC timer that holds the RESET output asserted for ≥1ms after VCC or RESET IN recovers above their respective thresholds, ensuring sufficient time for power stabilization before μP release.
Is MAX6389XS22D1+T qualified for automotive applications?
While MAX6389XS22D1+T itself carries the "+T" RoHS-compliant tape-and-reel suffix and is built on the same AEC-Q100 qualified process as /V automotive variants, it is not explicitly marked as /V in its part number. For automotive production use, designers should select the /V-suffixed version (e.g., MAX6389XS22D1/V+T) which undergoes full automotive qualification testing and screening per AEC-Q100 Rev G.
MAX6389XS22D1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.19V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6389XS22D1+T FAQ
1.How can I place an order for MAX6389XS22D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6389XS22D1+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 MAX6389XS22D1+T reliable?
The price and inventory of MAX6389XS22D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6389XS22D1+T is usually 5 days.
3.What payment methods are accepted for MAX6389XS22D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6389XS22D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6389XS22D1+T?
MAX6389XS22D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6389XS22D1+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 MAX6389XS22D1+T?
For technical support, including MAX6389XS22D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6389XS22D1+T requirements.
6.How does Aetrix verify that MAX6389XS22D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6389XS22D1+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 MAX6389XS22D1+T meets industry standards.
7.What is the process for return or replacement of MAX6389XS22D1+T?
All MAX6389XS22D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6389XS22D1+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 MAX6389XS22D1+T part is unused and in its original packaging.
Return procedure for MAX6389XS22D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6389XS22D1+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…
