My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6385XS22D7-T
- Part No.:
- MAX6385XS22D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS22D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,653
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6385XS22D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.19V reset threshold (±2.5% over -40°C to +125°C), 1200ms minimum VCC reset timeout, and debounced manual reset input. It monitors single supply voltage in battery-powered embedded systems where reliable power-on reset and brownout protection are critical.
For engineers reviewing the MAX6385XS22D7-T datasheet, MAX6385XS22D7-T pinout, MAX6385XS22D7-T application, or MAX6385XS22D7-T equivalent, key selection criteria include reset threshold accuracy at temperature extremes, guaranteed reset validity down to VCC = 1V, manual reset pulse handling, and SC70-4 package compatibility with space-constrained PCB layouts.
Technical Context
The device implements a precision bandgap-based voltage comparator for VCC monitoring and an internal timer that enforces a fixed 1200ms reset assertion window after VCC recovery. Its MR input features a 63kΩ internal pullup resistor and guarantees reset assertion for ≥1µs MR low pulse width.
Reset output state remains valid across full VCC range (1.0V–5.5V); the active-high push-pull driver delivers VOH ≥ 0.8×VCC at ISOURCE = 150µA (VCC ≥ 1.8V) and VOL ≤ 0.3V at ISINK = 80µA (VCC ≥ 1.0V), ensuring robust interface with modern µP reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V nominal (2.13V–2.24V over -40°C to +125°C); sets precise brownout detection point for 2.2V–2.5V core supplies. |
| VCC Reset Timeout | 1200ms minimum; ensures sufficient reset hold time for slow-ramping power rails or firmware initialization sequences. |
| Supply Current | 3µA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors without compromising supervision reliability. |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset assertion during deep brownout conditions and compatibility with 1.2V–5V logic families. |
| Reset Output Type | Active-high push-pull; eliminates need for external pullup resistor and provides rail-to-rail logic levels compatible with ARM Cortex-M, PIC, and MSP430 reset inputs. |
| Manual Reset Input | Debounced MR with 63kΩ internal pullup; accepts TTL/CMOS logic or momentary switch without external RC filtering. |
| Temperature Range | -40°C to +125°C; qualified for automotive under-hood, industrial motor control, and outdoor edge-node applications. |
Pinout & Package
MAX6385XS22D7-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, suitable for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary power supply input and monitored voltage source; must be decoupled with 0.1µF capacitor near pin for transient immunity. |
| 2 | RESET | Active-high push-pull reset output; drives µP reset input high during fault conditions and releases to low upon timeout completion. |
| 3 | MR | Active-low manual reset input; asserts reset when pulled below 0.3×VCC and includes internal 63kΩ pullup to VCC. |
| 4 | GND | Analog and digital ground reference; requires low-impedance connection to system ground plane to maintain reset threshold accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.19V with ±2.5% tolerance over full temperature range-enables precise power-rail monitoring without external calibration. |
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic reset behavior during deep undervoltage events, preventing spurious µP startup before stable supply is achieved. |
| 1200ms VCC reset timeout | Meets JEDEC JESD78 requirements for reset hold time in systems with slow power-up sequencing or large bulk capacitance. |
| Debounced manual reset input | Eliminates need for external RC debounce network-reduces BOM count and board area in handheld test equipment and field-serviceable modules. |
| Negative-going VCC transient immunity | Withstands 100mV overdrive transients up to 35µs duration without false reset assertion-critical for noisy automotive or industrial power environments. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch with coin-cell battery and ultra-low-power MCU requiring guaranteed reset during battery voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to ARM Cortex-M0+ during VCC drop below 2.19V, holding for 1200ms post-recovery. Use Value: Prevents firmware corruption during intermittent battery contact or cold-temperature discharge by enforcing minimum reset duration independent of supply ramp rate. | Use Scenario: DIN-rail mounted analog input module operating in factory floor environment with 24VDC supply and 3.3V logic rail. IC Role / Device Role / Timing Role: Monitoring 3.3V core supply and providing manual reset via front-panel button for field firmware updates. Use Value: Internal MR pullup and push-pull output eliminate external components, reducing failure points in harsh EMI environments while meeting IEC 61000-4-4 surge immunity requirements. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: BCM sub-module powered from vehicle battery with wide input variation (9V–16V) and local 5V/3.3V regulators. IC Role / Device Role / Timing Role: Secondary supervisor on 3.3V rail with AEC-Q100 qualified variant, detecting brownout and asserting reset to microcontroller. Use Value: ±2.5% threshold accuracy over -40°C to +125°C ensures consistent reset behavior across engine bay temperature extremes without derating. | Use Scenario: Revenue-grade meter with isolated RS-485 interface and tamper-detection circuitry requiring fail-safe boot sequence. IC Role / Device Role / Timing Role: Primary reset supervisor for dual-core metering SoC, coordinating power-up sequence between metrology and communication subsystems. Use Value: 1200ms timeout accommodates simultaneous startup of isolated DC-DC converters and secure boot ROM verification, eliminating race conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR22D7-T | Same 2.19V threshold and 1200ms timeout, but active-low push-pull output and no MR input. | Suitable only where µP accepts active-low reset and manual reset is handled externally. | Select when board layout already uses active-low reset topology and MR functionality is unnecessary. |
| TPS3808G33DBVR | 2.93V threshold (not 2.19V), 200ms timeout, 1.8V–6.5V VCC range, no MR input. | Requires redesign of reset timing and threshold; lacks manual reset capability. | Consider only if higher threshold aligns with system supply and shorter timeout is acceptable for faster boot cycles. |
Compared with MAX6326XR22D7-T and TPS3808G33DBVR, MAX6385XS22D7-T uniquely combines 2.19V precision threshold, 1200ms timeout, active-high push-pull output, and integrated MR-making it optimal for space-constrained, battery-operated systems requiring full reset autonomy without external components.
Availability
MAX6385XS22D7-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6385XS22D7-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 communications applications, emphasizing low power, high reliability, and small form factor.
The MAX6381–MAX6390 family delivers single/dual low-voltage microprocessor supervisory circuits optimized for battery-powered and thermally harsh environments where accurate, low-current reset supervision is essential.
FAQ
What is the exact reset threshold voltage of MAX6385XS22D7-T and how does it vary with temperature?
The MAX6385XS22D7-T has a factory-set nominal reset threshold of 2.19V, with guaranteed limits of 2.13V (min) to 2.24V (max) over the full operating temperature range of -40°C to +125°C. This ±2.5% accuracy is maintained across temperature due to internal trimming and bandgap reference stability-critical for consistent brownout detection in automotive and industrial applications where supply rails drift with thermal load.
Does MAX6385XS22D7-T require an external pullup resistor on its RESET output?
No, MAX6385XS22D7-T does not require an external pullup resistor because it features an active-high push-pull reset output. The internal driver actively sources current to drive the RESET line high during fault conditions and sinks current to pull it low after timeout. This eliminates external components, reduces board area, and ensures rail-to-rail logic levels compatible with most modern microcontrollers' reset inputs without signal degradation.
What is the minimum pulse width required on the MR input of MAX6385XS22D7-T to trigger a reset?
The MR input of MAX6385XS22D7-T requires a minimum low pulse width of 1µs to reliably assert reset. This short requirement allows compatibility with fast digital logic, microcontroller GPIO outputs, and mechanical switches-even without external debounce circuitry. The internal 63kΩ pullup resistor ensures MR defaults high when unconnected, making MAX6385XS22D7-T suitable for applications where manual reset is optional or infrequently used.
Can MAX6385XS22D7-T operate reliably at VCC = 1.0V, and what happens to the RESET output at that voltage?
Yes, MAX6385XS22D7-T is guaranteed to operate and maintain valid RESET output logic states down to VCC = 1.0V. At this voltage, the active-high push-pull output still delivers VOH ≥ 0.8×VCC (≥0.8V) when not asserted and VOL ≤ 0.3V when asserted-ensuring clean transitions into the µP's reset input even during deep brownout. This specification prevents undefined reset behavior that could cause erratic MCU startup in battery-depleted or low-voltage systems.
Is MAX6385XS22D7-T pin-compatible with older Maxim reset supervisors like MAX809?
Yes, MAX6385XS22D7-T is pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX6326–MAX6348 series in the same 4-pin SC70 package. Pin 1 is VCC, Pin 2 is RESET, Pin 3 is MR, and Pin 4 is GND-matching the footprint and signal assignment of those legacy parts. This allows drop-in replacement in existing designs to upgrade reset accuracy, timeout duration, or power consumption without PCB revision.
MAX6385XS22D7-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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.19V
- 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
MAX6385XS22D7-T FAQ
1.How can I place an order for MAX6385XS22D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS22D7-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 MAX6385XS22D7-T reliable?
The price and inventory of MAX6385XS22D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS22D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS22D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS22D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS22D7-T?
MAX6385XS22D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS22D7-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 MAX6385XS22D7-T?
For technical support, including MAX6385XS22D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS22D7-T requirements.
6.How does Aetrix verify that MAX6385XS22D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS22D7-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 MAX6385XS22D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS22D7-T?
All MAX6385XS22D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS22D7-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 MAX6385XS22D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS22D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6385XS22D7-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…
