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Analog Devices Inc./Maxim Integrated MAX6388XS22D7-T
- Part No.:
- MAX6388XS22D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS22D7-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MAX6388XS22D7-T from Maxim Integrated is a low-power 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), 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 controllers and dual-rail embedded systems.
For engineers reviewing the MAX6388XS22D7-T datasheet, MAX6388XS22D7-T pinout, MAX6388XS22D7-T application, or MAX6388XS22D7-T equivalent, key selection criteria include its 2.19V threshold accuracy, 1200ms VCC timeout, 4-pin SC70 package, RESET IN comparator interface, and compatibility with dual-supply power monitoring in portable instrumentation and automotive-qualified designs.
Technical Context
The MAX6388XS22D7-T integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.19V threshold while simultaneously accepting an external voltage via RESET IN, compared to an internal 1.27V reference. Its reset assertion logic triggers on either VCC falling below 2.19V or RESET IN falling below 1.27V.
A dedicated 1200ms internal timer ensures reset remains asserted after VCC recovery, and the active-high push-pull output drives high during reset with VOH ≥ 0.8×VCC (ISOURCE = 150µA at VCC ≥ 1.8V). The device operates across -40°C to +125°C with ±2.5% threshold stability and supports noise-immune operation via negative-going transient rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V nominal, ±2.5% over -40°C to +125°C - ensures reliable brownout detection across automotive temperature range |
| VCC Reset Timeout | 1200ms minimum - guarantees sufficient processor initialization time after power recovery |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and provides rail-to-rail logic levels |
| RESET IN Threshold | 1.27V ±2.5% - enables user-configurable secondary supply monitoring via resistor divider |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Package | 4-pin SC70 (X4+1) - 1.3mm × 1.6mm footprint ideal for space-constrained portable PCBs |
Pinout & Package
MAX6388XS22D7-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 1.3mm × 1.6mm × 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 - powers internal circuitry and sets reset trigger point at 2.19V |
| 2 | RESET | Active-high push-pull output - asserts high during reset condition and drives full logic high without external components |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for stable threshold reference |
| 4 | RESET IN | Auxiliary voltage monitor input - accepts externally divided voltage; asserts reset if input falls below 1.27V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneous monitoring of VCC (2.19V) and external rail via RESET IN (1.27V reference) - enables robust power sequencing in dual-core SoC systems |
| Low-power operation | 3μA supply current at 1.8V - extends battery life in portable medical monitors and handheld test equipment |
| High-accuracy threshold | ±2.5% reset threshold tolerance over full temperature range - eliminates need for calibration in automotive body control modules |
| Noise-immune design | Negative-going VCC transient immunity up to 100µs at 100mV overdrive - prevents spurious resets in electrically noisy engine control units |
| Guaranteed reset validity | Valid RESET output state maintained down to VCC = 1V - ensures deterministic behavior during deep brownout conditions |
Applications
| Power-Supply Monitoring in Portable Instruments | Dual-Rail Microcontroller Supervision |
|---|---|
Use Scenario: Battery-powered handheld multimeter with separate analog front-end (3.3V) and digital core (1.8V) supplies. IC Role / Device Role / Timing Role: MAX6388XS22D7-T monitors main 3.3V rail (VCC) and scales 1.8V rail via RESET IN divider to detect undervoltage on either domain. Use Value: Prevents corrupted ADC readings or flash write errors by asserting reset before either supply drops below safe operating level. | Use Scenario: Automotive infotainment SoC requiring coordinated reset of CPU core and I/O subsystems. IC Role / Device Role / Timing Role: MAX6388XS22D7-T supervises 1.1V core rail (via RESET IN) and 3.3V I/O rail (VCC), triggering unified reset pulse. Use Value: Eliminates timing skew between domain resets, ensuring synchronous boot sequence and avoiding bus contention. |
| Industrial Sensor Node Power Management | Low-Power Wireless Transceiver Supervision |
Use Scenario: LoRaWAN sensor node powered by CR2032 coin cell, using ultra-low-quiescent LDOs. IC Role / Device Role / Timing Role: MAX6388XS22D7-T monitors LDO output (VCC) and battery voltage (via RESET IN) to initiate graceful shutdown before brownout. Use Value: Preserves nonvolatile memory integrity and prevents RF transmission corruption during battery depletion. | Use Scenario: BLE module with separate 3.0V radio supply and 1.8V MCU supply. IC Role / Device Role / Timing Role: MAX6388XS22D7-T uses VCC to supervise radio supply and RESET IN to monitor MCU supply, asserting single reset line. Use Value: Ensures transceiver and controller reset synchronously, avoiding UART framing errors or SPI bus lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT22D7-T | Same electrical specs but in 6-pin μDFN (L611+1) instead of 4-pin SC70 - larger footprint, lower θJA (477°C/W vs. 322.6°C/W) | Better thermal performance in high-density layouts; requires different PCB land pattern and reflow profile | Select when board layout allows larger package and thermal dissipation is critical |
| TLV809K22DBZR | 2.2V threshold, 1400ms timeout, SOT-23-3 package - no RESET IN input, no manual reset, higher ICC (1.1μA typ) | Single-rail only; lacks auxiliary monitoring capability; simpler BOM but less flexible for dual-supply systems | Select when only primary rail supervision is needed and space constraints favor SOT-23 |
Compared with MAX6388XS22D7-T, the LT variant offers superior thermal management in compact μDFN form, while TLV809K22DBZR reduces cost and size for single-rail applications but sacrifices dual-voltage supervision and automotive temperature range support.
Availability
MAX6388XS22D7-T is available at Aetrix Electronics and suitable for portable instrumentation, dual-rail microcontroller supervision, and industrial sensor node power management requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.
Supply support for MAX6388XS22D7-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, with emphasis on low-power, high-reliability solutions.
The MAX6381–MAX6390 family delivers single/dual low-voltage supervisory circuits optimized for battery-powered and automotive systems where accurate, low-current reset generation and dual-rail monitoring are essential.
FAQ
What is the exact reset threshold voltage of the MAX6388XS22D7-T?
The MAX6388XS22D7-T has a factory-set VCC reset threshold of 2.19V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is derived from the "22" suffix in the part number per Maxim's Reset Threshold table, and applies specifically to the VCC input - not the RESET IN pin, which uses a fixed 1.27V internal reference.
Does the MAX6388XS22D7-T support manual reset functionality?
No, the MAX6388XS22D7-T does not include a manual reset (MR) input. Per Maxim's Selector Guide and Pin Configurations, MR is present only on MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6388XS22D7-T belongs to the MAX6387/MAX6388/MAX6389 group, which features RESET IN but no MR pin - confirmed by its 4-pin SC70 pinout (VCC, RESET, GND, RESET IN).
What is the function of the RESET IN pin on the MAX6388XS22D7-T?
The RESET IN pin on the MAX6388XS22D7-T is a high-impedance input to an auxiliary comparator referenced to 1.27V. When the voltage applied to RESET IN falls below 1.27V, the device asserts its active-high RESET output. It is typically connected to a resistor divider from a secondary supply rail, enabling dual-voltage supervision - for example, monitoring both a 3.3V I/O rail (VCC) and a scaled 1.8V core rail (via RESET IN).
Is the MAX6388XS22D7-T AEC-Q100 qualified?
No, the MAX6388XS22D7-T is not AEC-Q100 qualified. Its ordering information shows no "/V" suffix, which Maxim designates for automotive-qualified versions (e.g., MAX6388XS22D7/V+T). The standard MAX6388XS22D7-T is rated for -40°C to +125°C operation but lacks the extended reliability testing and documentation required for AEC-Q100 compliance.
What package type and dimensions does the MAX6388XS22D7-T use?
The MAX6388XS22D7-T uses a 4-pin SC70 package (package code X4+1, outline 21-0098), measuring 1.3mm × 1.6mm × 0.95mm. It is lead(Pb)-free and RoHS-compliant ("+T" suffix), with thermal resistance θJA = 322.6°C/W on a multilayer board - distinct from the 6-pin μDFN option used by the LT-series variants.
MAX6388XS22D7-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:
- 1.2s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS22D7-T FAQ
1.How can I place an order for MAX6388XS22D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS22D7-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 MAX6388XS22D7-T reliable?
The price and inventory of MAX6388XS22D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS22D7-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS22D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS22D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS22D7-T?
MAX6388XS22D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS22D7-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 MAX6388XS22D7-T?
For technical support, including MAX6388XS22D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS22D7-T requirements.
6.How does Aetrix verify that MAX6388XS22D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS22D7-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 MAX6388XS22D7-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS22D7-T?
All MAX6388XS22D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS22D7-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 MAX6388XS22D7-T part is unused and in its original packaging.
Return procedure for MAX6388XS22D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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