My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6745XKVD3
- Part No.:
- MAX6745XKVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX6745XKVD3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,190
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6745XKVD3 from Maxim Integrated is a low-power dual-voltage microprocessor supervisor IC that monitors primary VCC1 (factory-trimmed 2.925V threshold) and provides an independent power-fail comparator with 0.488V reference. It features push-pull active-low RESET output, PFI/PFO interface, and operates from -40°C to +85°C in a 5-pin SC70 package. Designed for battery-powered systems requiring reliable supply monitoring and orderly shutdown.
For engineers reviewing the MAX6745XKVD3 datasheet, MAX6745XKVD3 pinout, MAX6745XKVD3 application, or MAX6745XKVD3 equivalent, this page delivers verified specifications, exact pin functions, confirmed use cases in portable equipment and multivoltage systems, and validated alternative parts with documented technical differences.
Technical Context
The MAX6745XKVD3 implements a dual-supply supervision architecture with one factory-trimmed VCC1 reset threshold (2.925V) and an independent power-fail comparator referenced to 0.488V. It asserts RESET when VCC1 falls below threshold or PFI drops below 0.488V, with no timeout on PFO deassertion but 150ms minimum reset timeout on VCC1 recovery.
Its push-pull RESET output drives high to VCC1 (≥0.8×VCC1 at 800µA source), while PFO is open-drain active-low with 0.4V max VOL at 3.2mA sink. Supply current is 6µA typical, supporting ultra-low-power operation across the full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.925V ±2.5% - factory-trimmed for precise I/O supply monitoring |
| PFI Threshold | 0.488V ±1.5% - fixed internal reference for external voltage monitoring |
| Reset Timeout | 150ms min - ensures stable µP initialization after supply recovery |
| Supply Current | 6µA typical - enables multi-year battery life in portable devices |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive-adjacent environments |
| Package | 5-pin SC70 - 2.0mm × 1.25mm footprint for space-constrained PCBs |
| RESET Output | Push-pull active-low - eliminates need for external pullup resistor |
Pinout & Package
MAX6745XKVD3 is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Push-pull active-low reset output | Drives µP reset line directly; no external pullup required; logic-high = VCC1 |
| 2 - GND | Ground reference | Common return path for all internal circuits and external decoupling |
| 3 - PFI | Power-fail comparator input | Noninverting input referenced to 0.488V; monitors external supply via resistor divider |
| 4 - PFO | Power-fail comparator output | Open-drain active-low; signals impending supply failure without timeout delay |
| 5 - VCC1 | Primary supply input | Power source and monitored voltage (2.925V threshold); powers internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply supervision with dedicated PFI/PFO | Enables simultaneous VCC1 monitoring and independent power-fail detection for graceful shutdown |
| Factory-trimmed 2.925V VCC1 threshold | Eliminates external resistor network; reduces BOM count and layout complexity |
| 0.488V precision internal PFI reference | Supports accurate monitoring of sub-1V supplies (e.g., Li-ion battery discharge) |
| 150ms minimum reset timeout (D3 suffix) | Guarantees µP reset assertion long enough for complete system initialization |
| 6µA typical supply current | Extends battery runtime in always-on portable equipment such as GPS and POS terminals |
| Push-pull RESET output | Reduces external component count versus open-drain alternatives requiring pullup resistors |
Applications
| Portable Power Management | Multivoltage System Sequencing |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during discharge to trigger controlled shutdown before brownout. IC Role / Device Role / Timing Role: MAX6745XKVD3 acts as power-fail detector using PFI/PFO; asserts PFO when battery drops below ~2.8V (set via R-divider), enabling firmware-initiated save-and-sleep. Use Value: Prevents data corruption by providing early warning 100–500ms before VCC1 crosses 2.925V reset threshold. | Use Scenario: Ensuring proper power-up order between I/O rail (3.3V) and core rail (1.2V) in embedded controllers. IC Role / Device Role / Timing Role: MAX6745XKVD3 supervises VCC1 (I/O rail) and signals PFO to enable DC/DC converter for core rail only after I/O is stable. Use Value: Eliminates need for separate sequencing IC; leverages existing PFI/PFO interface to enforce safe startup sequence. |
| Battery-Powered POS Terminals | GPS Navigation Devices |
Use Scenario: Maintaining system integrity during brief AC adapter disconnects or battery swap events. IC Role / Device Role / Timing Role: MAX6745XKVD3 holds RESET asserted during transient dips on VCC1, preventing spurious reboots while backup capacitor sustains operation. Use Value: 150ms timeout matches typical capacitor hold-up time; 6µA quiescent current minimizes drain during standby. | Use Scenario: Detecting failing DC-DC converter input from vehicle battery to initiate GPS data save before loss of navigation function. IC Role / Device Role / Timing Role: MAX6745XKVD3 uses PFI to monitor 5V converter input; PFO triggers immediate firmware save when input drops below 4.2V (set via divider). Use Value: 0.488V reference enables accurate scaling for wide input ranges; open-drain PFO interfaces directly with µP interrupt pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6742XKVD3 | Same pinout, identical VCC1=2.925V and PFI/PFO architecture; differs only in ordering suffix - MAX6742 is standard dual-fixed variant, MAX6745 is designated for single-VCC1+PFI use per Selector Guide | No functional difference in circuit operation; MAX6742 datasheet explicitly lists same VCC1/PFI/PFO behavior and timing | Select MAX6742XKVD3 if sourcing flexibility or broader distributor stock is prioritized; identical electrical performance and layout compatibility |
| TPS3808G12DBVR | Single-supply supervisor with adjustable threshold (via resistor) and 200ms timeout; lacks dedicated PFI/PFO pair; 1.4µA supply current | Cannot replace PFI-driven early-warning shutdown; requires external components to emulate PFO functionality | Choose only if PFI/PFO capability is unnecessary and ultra-low current (<2µA) is critical; not drop-in compatible |
Compared with MAX6742XKVD3, the MAX6745XKVD3 offers identical supervision functionality and pin compatibility, while TPS3808G12DBVR lacks integrated power-fail detection and requires design modifications to replicate PFO signaling - making MAX6742XKVD3 the preferred functional alternative.
Availability
MAX6745XKVD3 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and GPS equipment requiring stable component supply and guaranteed long-term availability.
Supply support for MAX6745XKVD3 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 interface applications.
The MAX6736–MAX6745 family was engineered specifically for low-power dual/triple-voltage microprocessor supervision in space- and energy-constrained portable electronics, emphasizing factory-trimmed accuracy, minimal quiescent current, and integrated power-fail detection.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6745XKVD3?
The MAX6745XKVD3 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 confirmed by the 'S' suffix in the part number per Table 1 of the datasheet and applies specifically to the MAX6745 variant with D3 timeout.
Does the MAX6745XKVD3 include a manual reset input (MR)?
No, the MAX6745XKVD3 does not include a manual reset input. Per the Selector Guide and Pin Description table, MAX6745 is assigned to the "1 fixed" voltage monitor category with PFI/PFO functionality and no MR pin - unlike MAX6736–MAX6739. The RESET output is push-pull and asserted solely by VCC1 or PFI conditions.
What is the function of the PFI and PFO pins on the MAX6745XKVD3?
The PFI pin is the noninverting input to an internal comparator referenced to 0.488V; when PFI voltage falls below this threshold, the open-drain PFO pin is pulled low. PFO deasserts immediately (no timeout) when PFI rises above threshold, enabling fast power-fail warning for firmware-controlled shutdown - a key differentiator of the MAX6745XKVD3.
Can the MAX6745XKVD3 be used to monitor a negative supply voltage?
Yes, the MAX6745XKVD3 can monitor negative voltages using the PFI/PFO interface. As shown in Figure 4B of the datasheet, a resistor network converts the negative supply into a positive voltage at PFI relative to GND. When the negative rail becomes invalid, PFO goes high - enabling detection of -5V, -12V, or other negative rails with appropriate scaling.
What is the supply current consumption of the MAX6745XKVD3 at 25°C and 3.3V VCC1?
At TA = +25°C and VCC1 = 3.3V, the MAX6745XKVD3 consumes 6µA typical supply current, as specified in the Electrical Characteristics table under ICC1. This ultra-low quiescent current is maintained across its full operating voltage range (1.2V to 5.5V) and supports multi-year battery life in always-on portable applications.
MAX6745XKVD3 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6745XKVD3 FAQ
1.How can I place an order for MAX6745XKVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6745XKVD3 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 MAX6745XKVD3 reliable?
The price and inventory of MAX6745XKVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6745XKVD3 is usually 5 days.
3.What payment methods are accepted for MAX6745XKVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6745XKVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6745XKVD3?
MAX6745XKVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6745XKVD3 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 MAX6745XKVD3?
For technical support, including MAX6745XKVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6745XKVD3 requirements.
6.How does Aetrix verify that MAX6745XKVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6745XKVD3 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 MAX6745XKVD3 meets industry standards.
7.What is the process for return or replacement of MAX6745XKVD3?
All MAX6745XKVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6745XKVD3, 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 MAX6745XKVD3 part is unused and in its original packaging.
Return procedure for MAX6745XKVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6745XKVD3 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…
