My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6388XS22D4-T
- Part No.:
- MAX6388XS22D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS22D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,077
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6388XS22D4-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.19V VCC reset threshold (±2.5% over –40°C to +125°C), 1120ms minimum VCC reset timeout, and auxiliary RESET IN input for monitoring a second voltage. It operates from 1.0V to 5.5V supply and consumes only 3μA at 1.8V, enabling reliable power-up/brownout detection in space-constrained battery-powered systems.
For engineers reviewing the MAX6388XS22D4-T datasheet, MAX6388XS22D4-T pinout, MAX6388XS22D4-T application, or MAX6388XS22D4-T equivalent, key selection considerations include its 4-pin SC70 package, dual-monitoring capability via RESET IN, guaranteed reset validity down to VCC = 1V, and compatibility with dual-rail systems requiring independent core/I/O voltage supervision.
Technical Context
The MAX6388XS22D4-T integrates two independent voltage comparators: one monitors VCC against a fixed 2.19V threshold, while the other compares an external voltage applied to RESET IN against an internal 1.27V reference. Reset asserts when either comparator trips, and remains asserted for 1120ms after recovery.
Its active-high push-pull RESET output drives high during fault conditions and deasserts cleanly without external pullup; MR is absent, distinguishing it from manual-reset variants like MAX6385. The device uses BiCMOS process technology and supports AEC-Q100-qualified automotive versions (denoted by /V suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V (nominal), ±2.5% tolerance over –40°C to +125°C - ensures accurate brownout detection across industrial temperature range |
| RESET Timeout Period | 1120ms (min) - guarantees sufficient processor hold time during slow-rising or noisy power rails | Supply Current | 3μA at VCC = 1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout or ultra-low-VCC sequencing |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and simplifies interface to μP reset inputs |
| Auxiliary Input | RESET IN pin with 1.27V internal reference - allows user-defined second-threshold monitoring via external resistor divider |
| Package | 4-pin SC70 (X4+1 outline) - 1.2mm × 1.6mm footprint ideal for wearables and compact embedded modules |
Pinout & Package
MAX6388XS22D4-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.2mm × 1.6mm × 0.9mm with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail; powers internal circuitry and feeds VCC comparator |
| 2 | RESET | Active-high push-pull output; driven high during reset assertion, low otherwise; no external pullup required |
| 3 | GND | Analog/digital ground reference; must be connected to system ground plane for stable comparator operation |
| 4 | RESET IN | High-impedance auxiliary input; compared to 1.27V internal reference; used to monitor secondary supply (e.g., I/O voltage) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC (2.19V threshold) and external rail via RESET IN - enables robust dual-rail power integrity in SoC-based designs |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset state even during severe brownout or partial power loss - critical for fail-safe embedded control |
| Negative-going VCC transient immunity | Rejects sub-µs glitches up to 35µs wide (at 100mV overdrive) - prevents spurious resets in electrically noisy environments |
| Low quiescent current | 3μA at 1.8V enables >10-year battery life in always-on monitoring applications such as smart meters or asset trackers |
| Factory-trimmed precision threshold | ±2.5% accuracy over full temperature range eliminates need for external calibration or trimming components |
Applications
| Industrial PLC I/O Modules | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Monitoring both 3.3V I/O supply and 1.8V core voltage in programmable logic controller field modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting active-high reset to ARM Cortex-M microcontroller upon any rail dropout. Use Value: Prevents firmware corruption during partial power loss; 1120ms timeout accommodates slow-starting isolated DC/DC converters. | Use Scenario: Continuous glucose monitor using coin-cell battery where long-term reliability and ultra-low power are mandatory. IC Role / Device Role / Timing Role: Primary power supervisor detecting VCC brownout and secondary rail (sensor bias) via RESET IN to trigger safe shutdown sequence. Use Value: 3μA supply current extends battery life beyond 5 years; guaranteed operation down to 1V avoids false resets during end-of-life battery sag. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Supervising 5V system rail and 3.3V CAN transceiver supply in AEC-Q100–qualified body electronics modules. IC Role / Device Role / Timing Role: Dual-voltage watchdog ensuring MCU reset if either rail falls below specification during cold-cranking or load-dump events. Use Value: RESET IN input configured for 3.3V monitoring enables single-chip solution instead of two discrete supervisors - reduces BOM count and PCB area. | Use Scenario: Multi-rail power domain management in voice-controlled home hubs with separate 1.2V CPU, 1.8V memory, and 3.3V peripheral supplies. IC Role / Device Role / Timing Role: Secondary supervisor dedicated to 1.8V memory rail while main PMIC handles CPU core; RESET IN monitors memory voltage independently. Use Value: Eliminates risk of memory corruption due to undervoltage - 2.19V VCC threshold and 1.27V REF allow precise tailoring to memory IC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS22D4-T | Same pinout, same thresholds/timing, but open-drain active-low RESET output requiring external pullup | Suitable where system-level reset bus is shared and pulled up externally; incompatible with direct drive of active-high μP inputs | Select MAX6387XS22D4-T only if legacy board design already includes pullup or if reset polarity must match existing bus architecture |
| TLV803EB22DBZR | Single-supply (VCC only), no RESET IN; 2.2V threshold, 140ms timeout; SOT-23-3 package | Lacks dual-monitoring capability and longer timeout; smaller footprint but no auxiliary rail support | Choose TLV803EB22DBZR for cost-sensitive, single-rail applications where RESET IN functionality is unnecessary and shorter timeout is acceptable |
Compared with MAX6387XS22D4-T, MAX6388XS22D4-T provides simpler interface via push-pull output and eliminates pullup resistor placement; versus TLV803EB22DBZR, it adds critical dual-rail supervision and extended 1120ms timeout essential for complex power sequencing.
Availability
MAX6388XS22D4-T is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered medical sensors, automotive body control units, and smart home hub power management requiring stable component supply and long-lifecycle support.
Supply support for MAX6388XS22D4-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, and computing applications, with emphasis on power management, sensing, and interface solutions.
The MAX6381–MAX6390 family delivers ultra-low-power, high-accuracy supervisory circuits optimized for dual-voltage systems, battery longevity, and harsh-temperature operation in mission-critical embedded control.
FAQ
What is the exact reset threshold voltage of MAX6388XS22D4-T and how stable is it over temperature?
The MAX6388XS22D4-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. Its tempco is 60ppm/°C, meaning threshold drift is tightly controlled - for example, at –40°C it remains within 2.13V–2.25V, and at +125°C within 2.13V–2.25V. This stability ensures consistent brownout detection across automotive and industrial environments without calibration.
Does MAX6388XS22D4-T support manual reset functionality?
No, MAX6388XS22D4-T does not include a manual reset (MR) input. It belongs to the MAX6387/MAX6388/MAX6389 subgroup, which features only VCC monitoring and auxiliary RESET IN - unlike MAX6384/MAX6385/MAX6386 that integrate MR. If manual reset capability is required, consider MAX6385XS22D4-T (same threshold/timing, 4-pin SC70, with MR) or redesign to use external logic.
How is the auxiliary RESET IN input used in MAX6388XS22D4-T, and what voltage does it monitor?
The RESET IN pin on MAX6388XS22D4-T connects to an internal comparator referenced to a precise 1.27V bandgap. To monitor a secondary supply (e.g., 3.3V I/O rail), apply a divided version of that voltage using two resistors: R1 from the rail to RESET IN, R2 from RESET IN to GND. The threshold is set by VTH = 1.27V × (R1/R2 + 1). With <50nA input leakage, high-value resistors (e.g., 100kΩ/39kΩ) yield accurate, low-power monitoring without loading the source rail.
Can MAX6388XS22D4-T operate reliably when VCC drops below 1.8V?
Yes, MAX6388XS22D4-T is fully specified down to VCC = 1.0V and guarantees correct RESET output logic state (active-high during fault) even at 1.0V. At 1.8V, supply current is only 3μA; at 1.0V, it drops further. This makes MAX6388XS22D4-T suitable for ultra-low-voltage applications such as energy-harvesting systems or end-of-battery-life scenarios where VCC may sag to 1.1V–1.3V before shutdown.
What is the maximum allowable negative-going VCC transient duration that will not trigger a false reset on MAX6388XS22D4-T?
According to the MAX6388XS22D4-T datasheet's "Maximum Transient Duration vs. Reset Comparator Overdrive" graph, a negative-going VCC glitch of 100mV magnitude (i.e., VCC falling 100mV below the 2.19V threshold) can last up to ~35µs without causing a false reset. For larger overdrives (e.g., 200mV), the allowable duration shrinks to ~10µs. Adding a 0.1µF ceramic capacitor close to the VCC pin improves immunity further by filtering high-frequency noise.
MAX6388XS22D4-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:
- 2.19V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS22D4-T FAQ
1.How can I place an order for MAX6388XS22D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS22D4-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 MAX6388XS22D4-T reliable?
The price and inventory of MAX6388XS22D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS22D4-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS22D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS22D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS22D4-T?
MAX6388XS22D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS22D4-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 MAX6388XS22D4-T?
For technical support, including MAX6388XS22D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS22D4-T requirements.
6.How does Aetrix verify that MAX6388XS22D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS22D4-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 MAX6388XS22D4-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS22D4-T?
All MAX6388XS22D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS22D4-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 MAX6388XS22D4-T part is unused and in its original packaging.
Return procedure for MAX6388XS22D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6388XS22D4-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…
