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Analog Devices Inc./Maxim Integrated MAX6738XKVD3
- Part No.:
- MAX6738XKVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6738XKVD3.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,135
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Product details
Overview
The MAX6738XKVD3 from Maxim Integrated is a low-power dual-voltage microprocessor supervisor IC with one factory-trimmed reset threshold (VTH1 = 2.925V) and one adjustable reset input (RSTIN, 0.488V internal reference), open-drain active-low RESET output, manual reset input (MR), and 150ms minimum reset timeout period. It monitors primary I/O supply (VCC1) and secondary core supply (VCC2) in portable multivoltage systems requiring precise power sequencing and glitch immunity.
For engineers reviewing the MAX6738XKVD3 datasheet, MAX6738XKVD3 pinout, MAX6738XKVD3 application, or MAX6738XKVD3 equivalent, key selection criteria include its 2.925V/0.788V dual-threshold configuration, SC70-5 package footprint, 6µA quiescent current, RSTIN-adjustable monitoring down to 0.5V, and compatibility with battery-powered controllers and GPS equipment where supply margin and transient immunity are critical.
Technical Context
The MAX6738XKVD3 implements dual-supply supervision using independent comparators for VCC1 and VCC2, plus an external RSTIN input referenced to a precision 0.488V bandgap. Its reset assertion logic combines ORed fault detection across all three inputs, with a single 150ms timeout timer that restarts on any new threshold violation.
It features an internal 1.5kΩ MR pullup resistor, open-drain RESET output requiring external pullup, and operates across the full -40°C to +85°C industrial temperature range with guaranteed functionality down to 1.0V on VCC2 and 1.2V on VCC1 - enabling use in ultra-low-voltage core domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% (factory-trimmed; sets primary I/O supply reset point) |
| VCC2 Threshold | 0.788V ±2.5% (factory-trimmed; sets secondary core supply reset point) |
| RSTIN Threshold | 0.488V ±1.5% (internal reference; enables external voltage monitoring via resistor divider) |
| Reset Timeout | 150ms min (guaranteed reset hold time after all supplies recover; D3 suffix) |
| Supply Current | 6µA typical at +25°C (enables multi-year battery life in portable equipment) |
| Operating Temp | -40°C to +85°C (fully specified industrial-grade operation) |
| Package | 5-pin SC70 (1.6mm × 1.6mm footprint; space-constrained PCB designs) |
Pinout & Package
MAX6738XKVD3 is housed in a 5-pin SC70-5 package (1.6mm × 1.6mm × 0.9mm height), optimized for high-density portable applications. Pin 1 is RESET (open-drain active-low), Pin 2 is GND, Pin 3 is MR (active-low manual reset), Pin 4 is VCC2 (secondary supply input), and Pin 5 is VCC1 (primary supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Asserts low when any monitored supply drops below threshold; requires external pullup for logic-high state |
| 2 - GND | Analog/digital ground reference | Common return path for all internal comparators and bias circuits; must be low-impedance |
| 3 - MR | Active-low manual reset input | Pull low ≥1µs to force RESET low; internal 1.5kΩ pullup to VCC1 allows floating if unused |
| 4 - VCC2 | Secondary supply voltage input | Monitors core supply (0.788V threshold); valid operation down to 1.0V |
| 5 - VCC1 | Primary supply voltage input | Monitors I/O supply (2.925V threshold); powers internal circuitry and provides pullup reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed/adjustable threshold supervision | Simultaneously monitors VCC1 (2.925V) and VCC2 (0.788V) while allowing third voltage monitoring via RSTIN down to 0.5V |
| Ultra-low quiescent current | 6µA typical ICC1 ensures minimal battery drain in always-on portable systems |
| Glitch-immune reset timing | Transient rejection up to 35µs at 100mV overdrive prevents spurious resets from supply noise |
| Industrial temperature range | Guaranteed operation from -40°C to +85°C supports deployment in automotive infotainment and industrial controllers |
| SC70-5 space-saving footprint | 1.6mm × 1.6mm package reduces board area by >50% vs. SOT-23 alternatives |
Applications
| Portable Power Management | Multivoltage Processor Sequencing |
|---|---|
Use Scenario: Battery-powered GPS receiver with separate 3.0V I/O and 0.8V ARM core supplies. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RESET until both rails stabilize post-power-up, preventing processor lockup during brownout. Use Value: Prevents invalid boot sequences by enforcing 150ms minimum reset hold time and rejecting sub-35µs transients on either rail. | Use Scenario: Notebook computer motherboard managing 3.3V DDR interface and 1.2V CPU core power rails. IC Role / Device Role / Timing Role: Monitors VCC1 (3.3V) and VCC2 (1.2V) with factory-set thresholds to coordinate safe power-up order and detect undervoltage faults. Use Value: Ensures I/O supply reaches 2.925V before releasing RESET, guaranteeing stable interface initialization prior to core activation. |
| Handheld Controller Supervision | POS Terminal Voltage Monitoring |
Use Scenario: Industrial handheld controller with 2.8V display driver and 1.8V MCU core, powered by Li-ion battery. IC Role / Device Role / Timing Role: Uses RSTIN input to monitor battery voltage via resistor divider, triggering early warning reset before deep discharge. Use Value: Enables graceful shutdown at ~2.5V battery level (via RSTIN divider), extending usable runtime and protecting cell longevity. | Use Scenario: Point-of-sale terminal with 5V USB peripheral interface and 3.3V main logic supply. IC Role / Device Role / Timing Role: Supervises VCC1 (5V) and VCC2 (3.3V) to detect USB disconnect or regulator failure during transaction processing. Use Value: Guarantees immediate system reset on 5V drop below 2.925V, preventing corrupted memory writes or incomplete payment logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6738XKTD3 | VCC1 threshold = 3.075V (vs. 2.925V); same RSTIN, MR, and 150ms timeout | Suitable for systems with higher I/O supply tolerance (e.g., 3.3V ±5% rails) | Select when VCC1 nominal is ≥3.0V and tighter upper threshold margin is required |
| TPS3808G15DBVR | Single-supply supervisor (1.5V threshold only); no RSTIN or dual-threshold capability | Limited to single-rail monitoring; lacks manual reset and adjustable input | Use only for basic single-voltage reset; not a functional substitute for dual/threshold flexibility |
Compared with MAX6738XKVD3, MAX6738XKTD3 offers a higher VCC1 trip point for improved noise margin on 3.3V rails, while TPS3808G15DBVR provides lower cost for single-supply applications but omits RSTIN adjustability, MR, and dual-threshold supervision entirely.
Availability
MAX6738XKVD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and GPS equipment requiring stable component supply with guaranteed long-term availability and consistent electrical performance.
Supply support for MAX6738XKVD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6736–MAX6745 product line delivers ultra-low-power dual/triple-voltage supervisors for space-constrained, battery-operated systems requiring precise reset control and robust transient immunity across wide temperature ranges.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6738XKVD3?
The MAX6738XKVD3 has a factory-trimmed VCC1 reset threshold of 2.925V, with ±2.5% tolerance over the -40°C to +85°C temperature range. This value is defined by the 'V' suffix in the part number per Table 2 of the datasheet and applies specifically to the primary I/O supply monitoring function of the MAX6738XKVD3.
Does the MAX6738XKVD3 support monitoring a third voltage beyond VCC1 and VCC2?
Yes, the MAX6738XKVD3 supports third-voltage monitoring via its RSTIN pin, which compares the applied voltage against an internal 0.488V reference. By connecting an external resistor divider between VCC1 and GND, users can set custom trip points down to 0.5V - a capability confirmed in the Electrical Characteristics table and Functional Diagram for the MAX6738XKVD3.
What is the reset timeout period for the MAX6738XKVD3 and how is it selected?
The MAX6738XKVD3 has a 150ms minimum reset timeout period, indicated by the 'D3' suffix in its part number. This value is fixed at manufacture and guaranteed across temperature; it defines the minimum duration RESET remains asserted after all monitored supplies exceed their thresholds, ensuring reliable processor initialization in the MAX6738XKVD3.
Is an external pullup resistor required for the RESET output of the MAX6738XKVD3?
Yes, the MAX6738XKVD3 features an open-drain RESET output (Pin 1), requiring an external pullup resistor to VCC1 to establish a valid logic-high state when deasserted. This is explicitly stated in the Pin Description section and differs from push-pull variants like MAX6737/MAX6739, confirming the design requirement for the MAX6738XKVD3.
What is the supply current consumption of the MAX6738XKVD3 under typical operating conditions?
The MAX6738XKVD3 consumes 6µA typical supply current (ICC1) at +25°C with VCC1 = 3.3V and no load, as measured in the Electrical Characteristics table. This ultra-low quiescent current is a defining specification for the MAX6738XKVD3 and enables multi-year battery life in always-on portable devices.
MAX6738XKVD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.575V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX6738XKVD3 FAQ
1.How can I place an order for MAX6738XKVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6738XKVD3 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 MAX6738XKVD3 reliable?
The price and inventory of MAX6738XKVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6738XKVD3 is usually 5 days.
3.What payment methods are accepted for MAX6738XKVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6738XKVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6738XKVD3?
MAX6738XKVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6738XKVD3 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 MAX6738XKVD3?
For technical support, including MAX6738XKVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6738XKVD3 requirements.
6.How does Aetrix verify that MAX6738XKVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6738XKVD3 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 MAX6738XKVD3 meets industry standards.
7.What is the process for return or replacement of MAX6738XKVD3?
All MAX6738XKVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6738XKVD3, 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 MAX6738XKVD3 part is unused and in its original packaging.
Return procedure for MAX6738XKVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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