My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6385XS29D7-T
- Part No.:
- MAX6385XS29D7-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6385XS29D7-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,171
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6385XS29D7-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V reset threshold (±2.5% over –40°C to +125°C), 1200ms 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 MAX6385XS29D7-T datasheet, MAX6385XS29D7-T pinout, MAX6385XS29D7-T application, or MAX6385XS29D7-T equivalent, key selection criteria include reset threshold accuracy at temperature extremes, guaranteed valid reset assertion down to VCC = 1V, manual reset pulse handling (150ms timeout), and compatibility with 4-pin SC70 layout constraints.
Technical Context
The MAX6385XS29D7-T implements a precision bandgap-based voltage comparator for VCC monitoring and an internal monostable timer for fixed 1200ms reset timeout after VCC recovery. Its MR input features a 63kΩ internal pullup and accepts TTL/CMOS logic levels, with glitch rejection of 100ns.
Reset assertion occurs when VCC falls below 2.93V (min 2.85V, max 3.00V) or MR is driven low; reset remains asserted for ≥1200ms after VCC rises above threshold or ≥150ms after MR release. Output is guaranteed functional down to VCC = 1V, supporting low-voltage brownout detection in modern ultra-low-power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (2.85V–3.00V range), ±2.5% accuracy over –40°C to +125°C - ensures stable trip point across automotive and industrial environments |
| VCC Reset Timeout | 1200ms minimum - guarantees sufficient processor initialization time after power stabilization |
| Manual Reset Timeout | 150ms minimum - provides short, deterministic reset pulse for user-triggered recovery |
| Supply Current | 3μA at +1.8V, 6μA at +3.6V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 1.0V to 5.5V - supports direct interface with 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails |
| Reset Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives standard CMOS inputs directly |
| MR Input Pullup | 63kΩ internal resistor - allows momentary switch connection without external components |
Pinout & Package
MAX6385XS29D7-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 space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail - must be decoupled with 0.1µF capacitor near pin for transient immunity |
| 2 | RESET | Active-high push-pull reset output - drives high during reset assertion; sinks 80µA at VCC ≥ 1.0V, sources 150µA at VCC ≥ 1.8V |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; requires <0.3×VCC to assert reset; 1µs minimum pulse width accepted |
| 4 | GND | Ground reference for all internal comparators and output drivers - must connect to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.5% tolerance over full temperature range - eliminates external resistor divider and calibration effort |
| Guaranteed reset validity | Operates correctly down to VCC = 1V - ensures robust reset signaling even during deep brownout conditions |
| Debounced manual reset | 100ns glitch rejection and 1µs minimum pulse width - prevents false triggers from mechanical switch bounce or EMI |
| Negative-going VCC transient immunity | Withstands 10mV/µs transients up to 35µs duration without spurious reset - reduces need for additional filtering |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on sensor nodes and wearables |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with 1.8V MCU core and 3.3V analog front-end. IC Role / Device Role / Timing Role: Monitors 3.3V supply and asserts active-high RESET to hold MCU in reset until stable; MR enables user-initiated self-test. Use Value: 2.93V threshold matches 3.3V rail margin; 1200ms timeout ensures ADC calibration completes before firmware execution. | Use Scenario: DIN-rail mounted remote I/O terminal with isolated 24V DC input converted to 3.3V/5V supplies. IC Role / Device Role / Timing Role: Supervises primary 3.3V logic rail; MR tied to field-service button for safe firmware reload without power cycle. Use Value: 150ms manual reset timeout prevents accidental long-hold resets; ±2.5% threshold stability maintains reliability across –40°C to +70°C cabinet temperatures. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Low-voltage domain controller powered from vehicle's 5V bus, requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Resets microcontroller on ignition-on power ramp-up and detects brownout during load-dump events. Use Value: Valid operation down to VCC = 1V prevents premature release during slow battery recovery; 4-pin SC70 eases placement near MCU in dense PCB layouts. | Use Scenario: Wi-Fi-connected thermostat using dual-supply architecture (3.3V MCU, 1.2V RF SoC). IC Role / Device Role / Timing Role: Primary supervisor for 3.3V rail; MR linked to "factory reset" button on housing. Use Value: 3μA supply current minimizes standby drain; push-pull output eliminates pullup resistor, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6385XS29D4-T | Same 2.93V threshold and MR functionality, but 1120ms VCC reset timeout (vs. 1200ms) | Suitable where slightly shorter reset hold time is acceptable for faster boot sequences | Select when system timing budget permits 80ms reduction in reset assertion period |
| TPS3123E18DBVR | 2.93V threshold, 1200ms timeout, but active-low open-drain output and no MR input | Requires external pullup resistor and lacks manual reset capability | Choose only if board already uses open-drain reset topology and manual reset is unnecessary |
Compared with MAX6385XS29D4-T, the MAX6385XS29D7-T offers longer reset hold time for margin-critical systems; versus TPS3123E18DBVR, it provides integrated MR and push-pull drive, simplifying layout and eliminating external components.
Availability
MAX6385XS29D7-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and smart home hub power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6385XS29D7-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6381–MAX6390 family delivers ultra-low-power, factory-trimmed reset supervision for microprocessor-based systems where supply voltage margin, temperature stability, and board space are critical constraints.
FAQ
What is the exact reset threshold voltage of the MAX6385XS29D7-T and how does it vary with temperature?
The MAX6385XS29D7-T has a nominal reset threshold of 2.93V, with a guaranteed range of 2.85V to 3.00V at +25°C. Over the full operating temperature range of –40°C to +125°C, the threshold remains within ±2.5% of 2.93V (i.e., 2.85V to 3.00V), supported by a tempco of 60ppm/°C. This specification is confirmed in the Electrical Characteristics table of the official MAX6381–MAX6390 datasheet Rev 7.
Does the MAX6385XS29D7-T require an external pullup resistor on its RESET output?
No, the MAX6385XS29D7-T features an active-high push-pull RESET output, which actively drives both high and low states. Unlike open-drain variants, it does not require an external pullup resistor. The output sources up to 150µA at VCC ≥ 1.8V and sinks up to 80µA at VCC ≥ 1.0V, enabling direct interface with standard CMOS inputs without additional components.
What is the function and electrical behavior of the MR pin on the MAX6385XS29D7-T?
The MR (Manual Reset) pin on the MAX6385XS29D7-T is an active-low input with a 63kΩ internal pullup resistor to VCC. Driving MR below 0.3×VCC (for VTH < 4V) asserts reset; the device holds reset active for ≥150ms after MR is released. It accepts minimum 1µs pulses and rejects glitches <100ns, making it suitable for direct connection to momentary switches without external debounce circuitry.
Can the MAX6385XS29D7-T operate reliably at VCC = 1.2V?
Yes, the MAX6385XS29D7-T is guaranteed to assert and deassert RESET correctly down to VCC = 1.0V, per the Absolute Maximum Ratings and Electrical Characteristics sections. At 1.2V, it draws approximately 4µA (typical), maintains ±2.5% reset threshold accuracy, and sustains full MR functionality - enabling use in ultra-low-voltage energy-harvesting and battery-depleted scenarios.
Is the MAX6385XS29D7-T pin-compatible with legacy Maxim reset ICs like the MAX809?
Yes, the MAX6385XS29D7-T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other members of the MAX63xx family. Its 4-pin SC70 footprint matches the physical layout and signal assignment (VCC, RESET, MR, GND) of those predecessors, allowing drop-in replacement in existing designs without PCB modification - provided the reset polarity (active-high) and timeout requirements align.
MAX6385XS29D7-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:
- 2.93V
- 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
MAX6385XS29D7-T FAQ
1.How can I place an order for MAX6385XS29D7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6385XS29D7-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 MAX6385XS29D7-T reliable?
The price and inventory of MAX6385XS29D7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6385XS29D7-T is usually 5 days.
3.What payment methods are accepted for MAX6385XS29D7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6385XS29D7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6385XS29D7-T?
MAX6385XS29D7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6385XS29D7-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 MAX6385XS29D7-T?
For technical support, including MAX6385XS29D7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6385XS29D7-T requirements.
6.How does Aetrix verify that MAX6385XS29D7-T is sourced from the original manufacturer or authorized distributors?
All MAX6385XS29D7-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 MAX6385XS29D7-T meets industry standards.
7.What is the process for return or replacement of MAX6385XS29D7-T?
All MAX6385XS29D7-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6385XS29D7-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 MAX6385XS29D7-T part is unused and in its original packaging.
Return procedure for MAX6385XS29D7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6385XS29D7-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…
