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Analog Devices Inc./Maxim Integrated MAX6737XKTZD3+T
- Part No.:
- MAX6737XKTZD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6737XKTZD3+T.pdf
- Description:
- IC SUPERVISOR MPU SC-70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,649
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Product details
Overview
The MAX6737XKTZD3+T from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC with push-pull active-low reset output, manual reset input, and factory-trimmed thresholds of 3.075V (VCC1) and 2.313V (VCC2), 150ms minimum reset timeout, 6µA supply current, and SC70-5 package - used for reliable power-on reset and brownout detection in portable multivoltage systems.
For engineers reviewing the MAX6737XKTZD3+T datasheet, MAX6737XKTZD3+T pinout, MAX6737XKTZD3+T application, or MAX6737XKTZD3+T equivalent, key selection considerations include dual-supply monitoring accuracy, push-pull reset drive capability without external pullup, manual reset timing compliance, low quiescent current for battery operation, and SC70 footprint constraints.
Technical Context
This device implements two independent voltage comparators with precision internal references (±1.5% over temperature), each feeding a shared reset timeout timer that restarts on any threshold violation. The push-pull RESET output is referenced to VCC1 and drives high to ≥0.8×VCC1 when deasserted.
It features an internal 1.5kΩ MR pullup resistor, 100ns MR glitch rejection, and guaranteed valid reset assertion while either VCC1 or VCC2 remains above 1.2V - enabling robust supervision even during asymmetric supply sequencing or partial power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.075V ±1.5% - factory-trimmed for precise I/O supply monitoring at nominal 3.3V rails |
| VCC2 Threshold | 2.313V ±1.5% - factory-trimmed for core supply monitoring at nominal 2.5V or 2.3V rails |
| Reset Timeout | 150ms min - ensures µP initialization completes before release, per JEDEC JESD84-A44 |
| Supply Current | 6µA typical - enables >1-year battery life in coin-cell–powered IoT endpoints |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive cabin ambient environments |
| Package | SC70-5 (2.0mm × 1.25mm, 0.65mm pitch) - supports high-density portable PCB layouts |
| RESET Output | Push-pull, active-low - eliminates need for external pullup, simplifies µP interface |
Pinout & Package
Package: SC70-5, 5-pin surface-mount, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives high to ≥0.8×VCC1 when deasserted; sinks 3.2mA/0.4V low; no external pullup required |
| 2 - GND | Ground reference | Common return for all analog comparators, digital logic, and output drivers |
| 3 - MR | Manual reset input, active-low | Pulled up internally to VCC1 via 1.5kΩ; accepts CMOS levels or momentary switch to GND |
| 4 - VCC2 | Secondary supply input | Monitors core voltage (e.g., 2.5V/1.8V); comparator reference set to 2.313V |
| 5 - VCC1 | Primary supply input | Monitors I/O voltage (e.g., 3.3V); comparator reference set to 3.075V; powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-threshold supervision | Simultaneous monitoring of VCC1 and VCC2 with independent ±1.5% accuracy - eliminates need for two discrete supervisors |
| Push-pull RESET output | Direct interface to µP reset pins without external pullup - reduces BOM count and layout area |
| 150ms reset timeout | Guaranteed minimum delay ensures full µP clock stabilization and register initialization before release |
| 6µA total supply current | Enables always-on supervision in energy-constrained devices such as wearables and remote sensors |
| MR input with 100ns glitch rejection | Rejects ESD-induced noise on manual reset line - prevents spurious system resets during handling |
Applications
| Battery-Powered Portable Devices | Industrial Multivoltage Controllers |
|---|---|
Use Scenario: Supervising 3.3V I/O and 2.3V core rails in handheld medical monitors powered by Li-ion batteries. IC Role / Device Role / Timing Role: Dual-supply reset generator asserting active-low RESET until both rails stabilize post-power-up and remain above thresholds for 150ms. Use Value: Prevents firmware lockup during brownout events caused by battery sag under pulse load, extending field reliability. | Use Scenario: Monitoring 3.3V communication interface and 2.5V FPGA core supplies in programmable logic controllers. IC Role / Device Role / Timing Role: Independent voltage comparator with push-pull output directly driving FPGA PROG_B and INIT_B pins. Use Value: Eliminates external pullup resistors and reduces PCB layer count in space-constrained DIN-rail modules. |
| Notebook Subsystem Power Management | POS Terminal Power Sequencing |
Use Scenario: Ensuring correct startup order between 3.3V display interface and 2.3V SoC core in embedded notebook baseboards. IC Role / Device Role / Timing Role: Dual-threshold supervisor providing coordinated reset release only after both supplies exceed 3.075V and 2.313V for ≥150ms. Use Value: Avoids race conditions during cold boot that cause display initialization failures or memory corruption. | Use Scenario: Enabling safe power-down sequencing in point-of-sale terminals using manual reset button and dual-rail supervision. IC Role / Device Role / Timing Role: MR input debounced internally; RESET held low for 150ms after button release to guarantee clean µP restart. Use Value: Removes need for external RC debounce circuit, lowering assembly cost and improving long-term mechanical reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6737XKTZD7+T | Same pinout and thresholds, but 1200ms reset timeout instead of 150ms | Suitable for systems requiring longer reset hold time (e.g., FPGA configuration loading) | Select D7 variant only if extended timeout is explicitly required; D3 provides faster release for responsive µPs |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only), open-drain RESET, 2% threshold accuracy, 350ms timeout | Lacks dual-monitoring capability; requires external pullup; higher threshold tolerance | Use only when supervising one rail; not a functional replacement for dual-supply monitoring |
Compared with MAX6737XKTZD7+T and TPS3808G33DBVR, the MAX6737XKTZD3+T uniquely delivers dual fixed-threshold supervision with push-pull output and 150ms timeout in SC70-5 - making it optimal for compact, battery-sensitive dual-rail systems where fast, reliable reset assertion is critical.
Availability
MAX6737XKTZD3+T is available at Aetrix Electronics and suitable for portable electronics, industrial controllers, and POS terminals requiring stable component supply and lead-free compliance.
Supply support for MAX6737XKTZD3+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 management, sensing, and connectivity in demanding industrial and portable applications.
The MAX6736–MAX6745 family was engineered specifically for low-power dual- and triple-voltage microprocessor supervision in space-constrained, battery-operated systems - emphasizing ultra-low ICC, factory-trimmed accuracy, and minimal footprint.
FAQ
What is the function of the MR pin on the MAX6737XKTZD3+T?
The MR (Manual Reset) pin on the MAX6737XKTZD3+T is an active-low input with an internal 1.5kΩ pullup to VCC1. When pulled low for ≥1µs, it forces the RESET output low and holds it for 150ms after MR returns high. This allows external buttons or logic to initiate a controlled system reset independent of supply voltage conditions - a key feature implemented in the MAX6737XKTZD3+T for field service and test modes.
Does the MAX6737XKTZD3+T require an external pullup resistor on the RESET pin?
No, the MAX6737XKTZD3+T does not require an external pullup resistor on the RESET pin because it features a push-pull output stage. The RESET pin actively drives high to ≥0.8×VCC1 when deasserted and sinks current to GND when asserted - eliminating external components and reducing PCB area. This design distinction is confirmed for the MAX6737XKTZD3+T in the Pin Description and Electrical Characteristics tables.
What are the exact reset threshold voltages for the MAX6737XKTZD3+T?
The MAX6737XKTZD3+T has factory-trimmed reset thresholds of 3.075V for VCC1 and 2.313V for VCC2, as indicated by the "TZ" suffix per Table 1 in the datasheet. These values are specified over -40°C to +85°C with ±1.5% tolerance and enable precise supervision of standard 3.3V I/O and 2.5V/2.3V core rails - a defining specification of the MAX6737XKTZD3+T.
Can the MAX6737XKTZD3+T monitor a 1.8V supply?
No, the MAX6737XKTZD3+T cannot directly monitor a 1.8V supply because its VCC2 threshold is fixed at 2.313V. A 1.8V rail would fall below this threshold and cause continuous reset assertion. To supervise 1.8V, select a variant with lower VCC2 suffix (e.g., "TW" = 1.665V or "TI" = 1.388V), or use the MAX6738/MAX6739 with RSTIN for adjustable monitoring - the MAX6737XKTZD3+T is strictly dual-fixed-threshold.
Is the MAX6737XKTZD3+T RoHS-compliant and lead-free?
Yes, the MAX6737XKTZD3+T is RoHS-compliant and supplied in lead-free packaging, as confirmed by the "+T" suffix in the part number per Maxim's Ordering Information. The "+T" designation explicitly indicates lead-free termination, and the device meets JEDEC J-STD-609 Category 3 requirements for moisture sensitivity level (MSL) and reflow profile compatibility - verified for the MAX6737XKTZD3+T in production documentation.
MAX6737XKTZD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6737XKTZD3+T FAQ
1.How can I place an order for MAX6737XKTZD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6737XKTZD3+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 MAX6737XKTZD3+T reliable?
The price and inventory of MAX6737XKTZD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6737XKTZD3+T is usually 5 days.
3.What payment methods are accepted for MAX6737XKTZD3+T?
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4.How is shipping managed for MAX6737XKTZD3+T?
MAX6737XKTZD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6737XKTZD3+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 MAX6737XKTZD3+T?
For technical support, including MAX6737XKTZD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6737XKTZD3+T requirements.
6.How does Aetrix verify that MAX6737XKTZD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6737XKTZD3+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 MAX6737XKTZD3+T meets industry standards.
7.What is the process for return or replacement of MAX6737XKTZD3+T?
All MAX6737XKTZD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6737XKTZD3+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 MAX6737XKTZD3+T part is unused and in its original packaging.
Return procedure for MAX6737XKTZD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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