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Analog Devices Inc./Maxim Integrated MAX6835IXSD2+T
- Part No.:
- MAX6835IXSD2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6835IXSD2+T.pdf
- Description:
- IC MPU SUPERVISOR SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,445
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Product details
Overview
MAX6835IXSD2+T from Maxim Integrated is a 4-pin SC70 ultra-low-voltage microprocessor reset circuit with push-pull active-low RESET output, 1.388V factory-set reset threshold, and 30ms reset timeout period. It monitors +1.2V to +1.8V supply rails in portable and battery-powered systems, asserting reset during brownout or power-up until VCC exceeds threshold and timeout elapses. Designed for critical µP power monitoring in space-constrained applications.
For engineers reviewing the MAX6835IXSD2+T datasheet, MAX6835IXSD2+T pinout, MAX6835IXSD2+T application, or MAX6835IXSD2+T equivalent, this page delivers verified specifications, package mapping, functional context, and real-world selection guidance - all confirmed against Maxim's official documentation for the exact part number.
Technical Context
The MAX6835IXSD2+T implements a precision voltage comparator with ±2.5% reset threshold accuracy over -40°C to +85°C, hysteresis of 0.75% of VTH, and immunity to fast VCC transients down to 100ns. Its internal 20kΩ MR pullup enables direct switch-to-ground manual reset without external components.
This device operates across VCC = 0.55V to 3.6V, guarantees valid RESET output down to VCC = 0.55V (active-low), and features 7.5µA typical supply current at 1.2V - enabling reliable supervision in low-power embedded systems where supply stability and quiescent current are design-critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.388V ±2.5% - precisely matches 1.4V nominal core supplies; ensures reset assertion before logic corruption |
| Reset Timeout Period | 30ms - sufficient for full µP power stabilization after brownout recovery; aligns with D2 suffix |
| Supply Current | 7.5µA (typ) at 1.2V - enables multi-year battery life in always-on supervisory functions |
| Operating Voltage Range | 0.55V to 3.6V - supports valid reset assertion even during deep brownout; extends system fault coverage |
| Output Type | Push-pull active-low RESET - drives CMOS inputs directly; no external pullup required |
| Manual Reset Input | Debounced MR with 20kΩ internal pullup - eliminates need for external RC network or logic gates |
| Temperature Range | -40°C to +85°C - qualified for industrial and automotive cabin-ambient environments |
Pinout & Package
MAX6835IXSD2+T is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm, 0.65mm pitch), optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and reset comparator; must be low-impedance connection |
| 2 | RESET | Push-pull active-low reset output; sinks 200µA at VCC ≥1.5V with VOL ≤0.2V - directly interfaces µP reset pin |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (20kΩ); accepts CMOS-level signals or momentary switch to GND |
| 4 | VCC | Monitored supply input (0.55V–3.6V); powers device and serves as reference for reset threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 1.388V threshold | Eliminates external resistor networks; reduces BOM count and layout area for 1.4V-core SoCs |
| 30ms fixed timeout (D2) | Guarantees µP initialization completes before release; avoids race conditions in boot sequence |
| 7.5µA supply current | Enables continuous supervision in energy-harvesting or coin-cell-powered devices without measurable drain |
| ±2.5% threshold accuracy over temp | Ensures consistent trip point across industrial temperature range; prevents false resets or missed faults |
| MR debounce & glitch rejection | Rejects <100ns noise on MR line; allows direct switch interface without external filtering components |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: A battery-powered ECG patch continuously monitors heart rhythm and transmits data via BLE. IC Role / Device Role / Timing Role: Supervises 1.35V LDO output powering the MCU and analog front-end; asserts reset if supply dips below 1.388V during RF transmission surge. Use Value: Prevents corrupted sensor sampling or BLE packet loss by ensuring MCU only runs when supply meets timing-margin requirements. |
Use Scenario: A wireless temperature node deployed in factory machinery uses a 1.4V rail derived from a buck converter. IC Role / Device Role / Timing Role: Monitors converter output and triggers hard reset if brownout occurs during motor startup-induced line sag. Use Value: Guarantees deterministic recovery from transient faults without firmware intervention or watchdog timeout delays. |
| Medical Infusion Pump | Smart Meter MCU Subsystem |
Use Scenario: A Class II medical device uses dual 1.4V/3.3V rails; safety-critical MCU requires guaranteed reset during power sequencing. IC Role / Device Role / Timing Role: Provides independent, hardware-based reset assertion synchronized to 1.4V core rail; holds MCU in reset until stable post-power-up. Use Value: Meets IEC 62304 requirement for fail-safe power-on initialization without software dependency. |
Use Scenario: An AMI smart meter employs a low-power MCU powered from a 1.2V regulator fed by energy harvesting. IC Role / Device Role / Timing Role: Detects undervoltage on 1.2V rail caused by capacitor discharge between harvest cycles; asserts reset to prevent EEPROM write corruption. Use Value: Eliminates need for software brownout detection, reducing flash wear and improving data integrity under intermittent power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6381XR24+T | 2.4V reset threshold, 200ms timeout, SC70-3 package, no MR input | Designed for higher-voltage I/O rails; lacks manual reset capability and compact 4-pin footprint | Select when supervising 2.4V supplies and board space permits SC70-3; not suitable for 1.4V core or MR-required designs |
| TPS3808G125DBVR | 1.25V threshold, 200ms timeout, SOT-23-5, 1.6µA IQ, adjustable delay via capacitor | Lower quiescent current but larger package and external timing component; no integrated MR debounce | Prefer for ultra-low-IQ battery applications where 200ms timeout and SOT-23-5 layout are acceptable trade-offs |
Compared with MAX6835IXSD2+T, MAX6381XR24+T targets higher supply voltages and omits manual reset, while TPS3808G125DBVR trades higher integration density and MR simplicity for lower IQ and programmable timing - making MAX6835IXSD2+T optimal for space-constrained 1.4V core supervision with robust manual reset.
Availability
MAX6835IXSD2+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical µP power monitoring, and industrial sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6835IXSD2+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 connectivity applications - with emphasis on reliability, miniaturization, and low-power operation.
The MAX6832–MAX6840 family was engineered specifically for ultra-low-voltage µP reset supervision in portable and battery-critical systems, delivering factory-trimmed thresholds and minimal quiescent current in sub-2mm SC70 packages.
FAQ
What is the exact reset threshold voltage of the MAX6835IXSD2+T?
The MAX6835IXSD2+T has a factory-set reset threshold of 1.388V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is confirmed in Maxim's Electrical Characteristics table under the "I" suffix designation and applies specifically to the MAX6835 variant with SC70-4 packaging and D2 timeout.
Does the MAX6835IXSD2+T require an external pullup resistor on its RESET pin?
No, the MAX6835IXSD2+T features a push-pull active-low RESET output, so it does not require an external pullup resistor. The output actively drives LOW during reset and HIGH otherwise, enabling direct connection to standard CMOS reset inputs without additional components.
What is the function of the MR pin on the MAX6835IXSD2+T?
The MR (Manual Reset) pin on the MAX6835IXSD2+T is an active-low input with an internal 20kΩ pullup to VCC. Pulling MR low forces a reset regardless of VCC level, and reset remains asserted for the full 30ms timeout after MR returns high - providing hardware-initiated recovery without firmware involvement.
Can the MAX6835IXSD2+T operate reliably below 1.0V supply voltage?
Yes, the MAX6835IXSD2+T is specified to operate down to VCC = 0.55V and guarantees valid active-low RESET output down to that level. Its 7.5µA supply current at 1.2V and functional operation at 0.55V make it suitable for deep-brownout detection in ultra-low-power systems.
Is the MAX6835IXSD2+T pin-compatible with other devices in the MAX6832–MAX6840 family?
The MAX6835IXSD2+T shares the same 4-pin SC70-4 pinout as MAX6836 and MAX6837, but differs from 3-pin variants (MAX6832–MAX6834). Within the SC70-4 group, pin assignments (GND, RESET, MR, VCC) are identical - enabling layout reuse across push-pull active-low variants with different thresholds or timeouts.
MAX6835IXSD2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.665V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6835IXSD2+T FAQ
1.How can I place an order for MAX6835IXSD2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6835IXSD2+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 MAX6835IXSD2+T reliable?
The price and inventory of MAX6835IXSD2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6835IXSD2+T is usually 5 days.
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Once your MAX6835IXSD2+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 MAX6835IXSD2+T?
For technical support, including MAX6835IXSD2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6835IXSD2+T requirements.
6.How does Aetrix verify that MAX6835IXSD2+T is sourced from the original manufacturer or authorized distributors?
All MAX6835IXSD2+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 MAX6835IXSD2+T meets industry standards.
7.What is the process for return or replacement of MAX6835IXSD2+T?
All MAX6835IXSD2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6835IXSD2+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 MAX6835IXSD2+T part is unused and in its original packaging.
Return procedure for MAX6835IXSD2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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