My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6319LHUK31C-T
- Part No.:
- MAX6319LHUK31C-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319LHUK31C-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6319LHUK31C-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, manual reset input (MR), and factory-trimmed 3.08V reset threshold. It provides 140ms minimum power-on reset timeout, operates from 1.0V to 5.5V supply, and guarantees valid reset down to VCC = 1V. It is used in embedded control systems to prevent code-execution errors during power-up, brownout, or software lockup.
For engineers reviewing the MAX6319LHUK31C-T datasheet, MAX6319LHUK31C-T pinout, MAX6319LHUK31C-T application, or MAX6319LHUK31C-T equivalent, key selection criteria include its 3.08V reset threshold tolerance (±2.5% over -40°C to +125°C), MR-triggered reset propagation delay (230ns at VCC = 5V), push/pull output drive capability (0.3V VOL at 1.2mA sink), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6319LHUK31C-T implements a precision voltage monitor with laser-trimmed resistive divider setting VRST = 3.08V (±1.5% at +25°C, ±2.5% over full temperature range) and hysteresis of 3mV. Its reset generator asserts active-low RESET for ≥140ms after VCC rises above threshold or after MR transitions high.
No watchdog timer is integrated - the device lacks WDI pin functionality per Selector Guide and ordering table. It features internal 52kΩ MR pullup, 100ns MR glitch rejection, and guaranteed reset validity down to VCC = 1V, enabling robust operation in low-voltage battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.08V nominal (±2.5% over -40°C to +125°C); ensures reliable detection of 3.3V rail brownout before system instability. |
| Reset Timeout Period | 140ms minimum (MAX63__C_-T variant); holds processor in reset long enough for power rails and clocks to stabilize. |
| Supply Voltage Range | 1.0V to 5.5V; supports operation during deep brownout and enables use with Li-ion, 3.3V, and 5V systems. |
| Reset Output Type | Active-low, push/pull CMOS; sinks 1.2mA at VCC ≥ 2.7V with VOL ≤ 0.3V - eliminates need for external pullup. |
| Manual Reset Input | Internal 52kΩ pullup; accepts TTL/CMOS logic levels; 100ns glitch rejection prevents spurious resets from noise. |
| Operating Temperature | -40°C to +125°C; qualified per AEC-Q100 Grade 1 - suitable for under-hood automotive and industrial environments. |
| Package | SOT23-5 (U5+2A); 2.9mm × 1.6mm footprint - enables compact placement on space-constrained PCBs. |
Pinout & Package
SOT23-5 package (package code U5+2A, outline 21-0057), surface-mount, RoHS-compliant, with thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output; drives low to hold µP in reset; sources current when deasserted - no external components required. |
| 2 | GND | Ground reference for all internal circuitry and reset timing; must be connected to system ground plane for noise immunity. |
| 3 | MR | Active-low manual reset input; internal 52kΩ pullup to VCC; pulling low forces reset for full 140ms timeout period. |
| 4 | NC | No connect - pin 4 is unconnected internally; must be left floating or tied to GND per layout best practice. |
| 5 | VCC | Power supply input; monitors voltage for reset assertion; valid operation guaranteed from 1.0V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated reset threshold, timeout timer, and MR pullup eliminate discrete resistors/capacitors - reduces BOM count and layout area. |
| Guaranteed reset validity to 1V | Ensures clean, monotonic reset assertion even during severe brownout - prevents partial initialization or latch-up in low-VCC conditions. |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS subsystems requiring Grade 1 reliability. |
| Factory-trimmed precision | 3.08V threshold trimmed to ±1.5% at +25°C and ±2.5% over full temperature range - avoids calibration overhead in production. |
| 100ns MR glitch rejection | Hardware-filtered manual reset input rejects EMI-induced transients - eliminates need for external RC debounce networks. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Supervises 3.3V I/O and 5V logic rails; asserts reset during undervoltage events and upon operator-initiated system restart via front-panel button. Use Value: Prevents corrupted ladder logic execution during brownout; 140ms timeout ensures FPGA configuration completes before CPU release. |
Use Scenario: Reset management for microcontrollers in door module ECUs exposed to automotive battery transients (-0.3V to +27V) and temperature extremes. IC Role / Device Role / Timing Role: Monitors switched 5V supply derived from vehicle battery; triggers reset on load-dump-induced dips below 3.08V; MR pin wired to service diagnostic switch. Use Value: AEC-Q100 qualification ensures compliance with ISO 16750-2; 1V operation margin allows reset assertion even during cranking (6V battery sag). |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Battery-backed vital sign monitor requiring fail-safe boot sequence and user-triggered recalibration reset. IC Role / Device Role / Timing Role: Supervises primary 3.3V LDO output; MR pin connected to tactile reset button; reset output drives µP's active-low nRST pin. Use Value: 3.08V threshold matches Li-ion discharge curve endpoint; push/pull output eliminates external pullup - saves board space and leakage current. |
Use Scenario: Tamper-resistant electricity meter with isolated MCU and real-time clock, operating from split-phase AC-derived 3.3V rail. IC Role / Device Role / Timing Role: Detects undervoltage on metering SoC supply; MR pin linked to optical port reset command; reset held for 140ms to ensure RTC synchronization post-power-loss. Use Value: Guaranteed reset down to 1V prevents flash corruption during capacitor hold-up decay; SOT23-5 footprint fits narrow meter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6320PUK31CY-T | Open-drain reset output, same 3.08V threshold and 140ms timeout; includes watchdog input (WDI) with 1.6s timeout. | Requires external pullup resistor; supports watchdog monitoring of firmware execution - not present in MAX6319LHUK31C-T. | Select when system requires both manual reset and watchdog supervision; avoid if push/pull simplicity and zero external components are critical. |
| TLV803EB30DBZR | 3.0V reset threshold (±2%), 200ms timeout, SOT23-5, no MR or watchdog; lower quiescent current (0.5µA vs 3–12µA). | Fixed function only - no manual reset capability; not AEC-Q100 qualified; narrower temp range (-40°C to +125°C still supported but not certified). | Select for cost-sensitive, non-automotive applications where MR is unnecessary and longer timeout is acceptable. |
Compared with MAX6319LHUK31C-T, MAX6320PUK31CY-T adds watchdog supervision at the cost of open-drain output complexity, while TLV803EB30DBZR offers lower power and smaller footprint but omits manual reset and automotive qualification - making MAX6319LHUK31C-T optimal for AEC-Q100-compliant systems needing MR and push/pull simplicity.
Availability
MAX6319LHUK31C-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and automotive qualification.
Supply support for MAX6319LHUK31C-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 demanding industrial, automotive, and computing applications, with emphasis on reliability, integration, and low-power operation.
The MAX6316–MAX6322 family delivers highly configurable µP supervisory circuits targeting systems requiring guaranteed reset behavior during power transients, brownout, and software faults - especially where space, qualification, and component count are critical.
FAQ
What is the exact reset threshold voltage of the MAX6319LHUK31C-T?
The MAX6319LHUK31C-T has a factory-trimmed nominal reset threshold of 3.08V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed in Table 1 and Ordering Information of the MAX6316–MAX6322 datasheet, and corresponds to the "31" suffix in the part number.
Does the MAX6319LHUK31C-T include a watchdog timer?
No, the MAX6319LHUK31C-T does not include a watchdog timer. Per the Selector Guide and Pin Configurations section, MAX6319 variants (including MAX6319LHUK31C-T) lack the WDI pin and associated watchdog circuitry. Only MAX6316, MAX6317, MAX6318, MAX6320, and MAX6321 devices feature watchdog functionality.
What is the function of Pin 4 on the MAX6319LHUK31C-T?
Pin 4 on the MAX6319LHUK31C-T is a no-connect (NC) terminal - it is unconnected internally and serves no functional purpose. The datasheet Pin Description table explicitly lists Pin 4 as "-" for MAX6319LH, confirming it must be left floating or tied to GND per standard SOT23 layout practice to avoid parasitic coupling.
Can the MAX6319LHUK31C-T operate reliably at VCC = 1.2V?
Yes, the MAX6319LHUK31C-T is guaranteed to assert a valid reset output down to VCC = 1.0V, as stated in Absolute Maximum Ratings and Electrical Characteristics. At VCC = 1.2V, the push/pull RESET output maintains VOL ≤ 0.3V when sinking 50µA, ensuring compatible logic-level signaling with ultra-low-voltage microcontrollers.
Is the MAX6319LHUK31C-T qualified for automotive applications?
Yes, the MAX6319LHUK31C-T is AEC-Q100 qualified (Grade 1, -40°C to +125°C), as explicitly noted in the Benefits and Features section of the datasheet. This certification validates its reliability for automotive body electronics, infotainment, and ADAS subsystems where extended temperature operation and transient immunity are mandatory.
MAX6319LHUK31C-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6319LHUK31C-T FAQ
1.How can I place an order for MAX6319LHUK31C-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319LHUK31C-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 MAX6319LHUK31C-T reliable?
The price and inventory of MAX6319LHUK31C-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319LHUK31C-T is usually 5 days.
3.What payment methods are accepted for MAX6319LHUK31C-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319LHUK31C-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319LHUK31C-T?
MAX6319LHUK31C-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319LHUK31C-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 MAX6319LHUK31C-T?
For technical support, including MAX6319LHUK31C-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319LHUK31C-T requirements.
6.How does Aetrix verify that MAX6319LHUK31C-T is sourced from the original manufacturer or authorized distributors?
All MAX6319LHUK31C-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 MAX6319LHUK31C-T meets industry standards.
7.What is the process for return or replacement of MAX6319LHUK31C-T?
All MAX6319LHUK31C-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319LHUK31C-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 MAX6319LHUK31C-T part is unused and in its original packaging.
Return procedure for MAX6319LHUK31C-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6319LHUK31C-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…
