My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6388XS18D7-T
- Part No.:
- MAX6388XS18D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS18D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,375
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6388XS18D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 1.8V reset threshold (±2.5% over −40°C to +125°C), 1200ms minimum VCC reset timeout, and auxiliary RESET IN input for dual-voltage monitoring. It consumes only 3μA at 1.8V and guarantees valid reset state down to VCC = 1V - used in battery-powered instrumentation and dual-rail embedded systems requiring precise brownout detection.
For engineers reviewing the MAX6388XS18D7-T datasheet, MAX6388XS18D7-T pinout, MAX6388XS18D7-T application, or MAX6388XS18D7-T equivalent, key selection criteria include its 1.8V reset threshold accuracy, 1200ms timeout, 4-pin SC70 package, dual-supply monitoring capability via RESET IN, and guaranteed operation down to 1V supply.
Technical Context
The MAX6388XS18D7-T integrates a precision voltage comparator referenced to an internal 1.27V bandgap, comparing both VCC and an external voltage applied to RESET IN against their respective thresholds. Reset assertion occurs if either falls below its threshold, with independent timing control governed by an internal RC timer.
Its auxiliary RESET IN input accepts externally scaled voltages via resistor divider (e.g., for core/I/O rail monitoring), while the active-high push-pull RESET output drives directly without external pullup. The device features negative-going VCC transient immunity up to 35µs at 100mV overdrive and operates across −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.80V ±2.5% (−40°C to +125°C); ensures reliable brownout detection for 1.8V logic rails |
| VCC Reset Timeout | 1200ms min; holds processor in reset long enough for stable power-up of downstream peripherals |
| Supply Current | 3μA at VCC = 1.8V; enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset assertion even during deep brownout conditions |
| RESET Output Type | Active-high push-pull; eliminates need for external pullup resistor and reduces BOM count |
| Auxiliary Input | RESET IN pin with 1.27V internal reference; enables user-configurable second-voltage monitoring (e.g., VCORE) |
| Package | 4-pin SC70 (X4+1); 1.3mm × 1.1mm footprint ideal for space-constrained portable designs |
Pinout & Package
MAX6388XS18D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.1mm × 0.6mm with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor; powers internal circuitry and feeds reset comparator |
| 2 | RESET | Active-high push-pull output; asserts high during reset condition and deasserts low after timeout |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | High-impedance auxiliary input; compared to internal 1.27V reference to monitor secondary supply (e.g., via resistor divider) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC and external rail via RESET IN enables robust dual-rail system reset coordination |
| Low-power operation | 3μA supply current at 1.8V allows integration into always-on battery-backed subsystems without compromising runtime |
| Guaranteed reset validity | RESET output remains logically valid down to VCC = 1V - critical for orderly shutdown in collapsing supply scenarios |
| Negative transient immunity | Withstands VCC glitches ≤35µs at 100mV overdrive, reducing false resets in electrically noisy environments |
| Factory-trimmed accuracy | ±2.5% reset threshold tolerance over full temperature range eliminates need for external calibration components |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor powered by CR2032 coin cell with separate 1.8V MCU rail and 3.3V analog front-end. IC Role / Device Role / Timing Role: Supervises both rails using VCC (1.8V) and RESET IN (scaled 3.3V), asserting reset if either drops below threshold. Use Value: Prevents corrupted ADC sampling or flash writes during brownout, leveraging 1200ms timeout to ensure full analog settling before MCU release. | Use Scenario: DIN-rail mounted PLC module with isolated 5V logic and 24V field-side power, requiring coordinated reset on both domains. IC Role / Device Role / Timing Role: Monitors 5V logic rail directly on VCC and 24V field rail via resistor divider on RESET IN. Use Value: Ensures deterministic startup sequence across isolation barrier; 1.8V threshold variant avoids false triggers from 5V rail ripple. |
| Battery-Powered IoT Edge Nodes | Dual-Voltage FPGA Configuration Circuits |
Use Scenario: LoRaWAN node with ultra-low-power MCU (1.8V) and RF transceiver (3.3V), operating from Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Detects end-of-life voltage collapse on main rail (VCC) and monitors backup supervisor rail (RESET IN). Use Value: 3μA quiescent current extends shelf life; 1200ms timeout accommodates slow capacitor discharge in energy-harvesting variants. | Use Scenario: FPGA-based vision processing board with 1.0V core, 1.8V I/O, and 3.3V configuration flash - all requiring synchronized reset release. IC Role / Device Role / Timing Role: Uses VCC for 1.8V I/O rail and RESET IN for 3.3V flash supply; triggers global reset when either fails. Use Value: Eliminates need for discrete comparators and timers; 4-pin SC70 saves PCB area versus dual discrete supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT18D7-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70; higher thermal resistance (θJA = 477°C/W vs. 322.6°C/W) | Preferred for thermally demanding industrial environments where μDFN's better heat dissipation matters | Select when board layout allows larger footprint and thermal performance outweighs size constraints |
| TPS3808G18DBVR | TI part with 1.8V threshold, 1200ms timeout, but only single-supply monitoring (no RESET IN); 1.5μA typical ICC at 1.8V | Lacks auxiliary voltage monitoring - unsuitable for dual-rail coordination without added components | Choose only for single-rail systems where lowest possible current draw is critical and space permits SOT-23-5 |
Compared with MAX6388LT18D7-T, the MAX6388XS18D7-T offers superior board-area efficiency in compact portable designs; versus TPS3808G18DBVR, it provides essential dual-supply supervision without external circuitry - justifying its use where system-level reliability depends on coordinated multi-rail reset behavior.
Availability
MAX6388XS18D7-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, battery-powered IoT edge nodes, and dual-voltage FPGA configuration circuits requiring stable component supply across automotive-grade temperature ranges.
Supply support for MAX6388XS18D7-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 power, sensing, and interface applications, with emphasis on low-power, high-reliability solutions for harsh environments.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor reset supervision with ultra-low quiescent current, targeting space- and energy-constrained embedded systems in industrial, medical, and automotive markets.
FAQ
What is the exact reset threshold voltage of MAX6388XS18D7-T and how stable is it over temperature?
The MAX6388XS18D7-T has a factory-set nominal reset threshold of 1.80V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −40°C to +125°C. This stability is achieved using a trimmed bandgap reference and on-die compensation circuitry. The MAX6388XS18D7-T maintains this tolerance without external calibration, making it suitable for unattended remote deployments where thermal cycling is unavoidable.
Does MAX6388XS18D7-T support monitoring of two independent power supplies?
Yes, the MAX6388XS18D7-T supports dual-supply monitoring: VCC is monitored directly for the primary rail (here 1.8V), and the RESET IN pin accepts an externally scaled voltage referenced to an internal 1.27V comparator. By connecting a resistor divider to RESET IN, users can configure supervision of a second rail - such as 3.3V or 5V - enabling coordinated reset assertion if either supply fails. This functionality is confirmed in the Pin Description and Applications Information sections of the official datasheet.
What is the function of the RESET output on MAX6388XS18D7-T and how does it behave during power failure?
The RESET output of the MAX6388XS18D7-T is an active-high push-pull driver. It asserts high whenever VCC falls below 1.80V or the voltage at RESET IN drops below its derived threshold, holding high for a guaranteed minimum of 1200ms after the monitored voltage(s) recover. Crucially, the MAX6388XS18D7-T guarantees correct logic state down to VCC = 1.0V, ensuring deterministic reset behavior even during severe brownout conditions before complete power loss.
Can MAX6388XS18D7-T operate from a 1.0V supply, and what happens to RESET output below 1.8V?
Yes, the MAX6388XS18D7-T operates from 1.0V to 5.5V and guarantees valid RESET output logic states down to VCC = 1.0V - meaning it continues asserting or deasserting correctly even as supply collapses. Below 1.8V, the internal comparator remains functional until VCC reaches ~1.0V; the RESET output stays asserted high during undervoltage and only releases after both the threshold is crossed *and* the 1200ms timeout expires. This behavior is explicitly specified in the Electrical Characteristics table under "RESET Output State Guaranteed Valid Down to VCC = 1V".
What package type and dimensions does MAX6388XS18D7-T use, and is it RoHS-compliant?
The MAX6388XS18D7-T uses a 4-pin SC70 package (outline number 21-0098, land pattern 90-0187), measuring 1.3mm × 1.1mm × 0.6mm with gull-wing leads. The "+T" suffix confirms lead(Pb)-free and RoHS-compliant construction. Its small footprint supports high-density layouts in portable and wearable electronics, and the package is qualified per JEDEC standards for reflow soldering at up to +260°C.
MAX6388XS18D7-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.8V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS18D7-T FAQ
1.How can I place an order for MAX6388XS18D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS18D7-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 MAX6388XS18D7-T reliable?
The price and inventory of MAX6388XS18D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS18D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS18D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS18D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS18D7-T?
MAX6388XS18D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS18D7-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 MAX6388XS18D7-T?
For technical support, including MAX6388XS18D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS18D7-T requirements.
6.How does Aetrix verify that MAX6388XS18D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS18D7-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 MAX6388XS18D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS18D7-T?
All MAX6388XS18D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS18D7-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 MAX6388XS18D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS18D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS18D7-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…
