My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6348XR33+T
- Part No.:
- MAX6348XR33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6348XR33+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6348XR33+T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 3.3V power supplies and assert a reset signal during brownout, power-up, or power-down events. It features a factory-trimmed 3.30V reset threshold (±1.5% at +25°C, ±2.5% over -40°C to +85°C), 100ms minimum reset timeout, ultra-low 1µA max supply current, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-power reset assertion.
For engineers reviewing the MAX6348XR33+T datasheet, MAX6348XR33+T pinout, MAX6348XR33+T application, or MAX6348XR33+T equivalent, key selection considerations include its open-drain RESET output for bidirectional µP interface compatibility, SC70-3 package footprint, guaranteed reset behavior down to 1.2V VCC, and immunity to fast VCC transients up to 100µs depending on overdrive.
Technical Context
The MAX6348XR33+T implements a precision bandgap-based voltage comparator with hysteresis (9.5mV) to detect VCC drops below 3.30V. Its internal timing circuit ensures a minimum 100ms reset pulse width after VCC recovers above threshold, with full specification across -40°C to +85°C.
As an open-drain device, it requires an external pull-up resistor and interfaces directly with µPs having bidirectional reset pins (e.g., Motorola 68HC11). It ignores negative-going VCC transients shorter than ~100µs when VCC dips 100mV below threshold, enhancing noise immunity without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.30V (±1.5% at +25°C); ensures reliable reset assertion for nominal 3.3V systems during undervoltage conditions. |
| Reset Timeout | 100ms minimum; guarantees µP remains held in reset long enough for stable power rail recovery and clock stabilization. |
| Supply Current | 1µA maximum at +25°C; enables multi-year operation in coin-cell–powered portable devices. |
| VCC Operating Range | 1.2V to 5.5V; supports valid reset assertion even during deep brownout or partial power loss. |
| Output Type | Open-drain RESET; allows wired-OR configuration and direct interface with bidirectional µP reset pins using one external pull-up. |
| Reset Hysteresis | 9.5mV; prevents oscillatory reset toggling near threshold during slow VCC ramp-up or noise. |
| Transient Immunity | Rejects VCC glitches ≤100µs at 100mV overdrive; eliminates false resets from switching noise or ESD-induced dips. |
Pinout & Package
MAX6348XR33+T is housed in a 3-pin SC70-3 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output stage; must be connected to system ground plane for accurate threshold sensing. |
| 2 - RESET | Active-low open-drain output | Asserts logic-low during reset; requires external pull-up to VCC or another rail; sinks ≥1.6mA when asserted. |
| 3 - VCC | Power supply input | Monitored supply rail; powers internal circuitry and defines reset threshold reference; functional down to 1.2V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in always-on monitoring applications like smart sensors. |
| Factory-trimmed precision threshold | 3.30V ±1.5% eliminates need for external resistive divider or calibration in 3.3V systems. |
| Open-drain output architecture | Supports multi-device reset bus sharing and seamless integration with µPs having bidirectional reset I/O (e.g., 68HC11). |
| Guaranteed operation down to 1.2V VCC | Ensures deterministic reset state during severe brownout, preventing undefined µP behavior before complete power loss. |
| 100mV typical reset hysteresis | Provides robust noise margin against supply ripple and prevents chatter during marginal VCC recovery. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch operating from a CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low RESET until 3.3V rail stabilizes post-wake-up. Use Value: 1µA max ICC extends battery life beyond 3 years; open-drain output interfaces directly with ARM Cortex-M0+ bidirectional reset pin. |
Use Scenario: DIN-rail mounted analog input module exposed to 24V DC field wiring with transient coupling. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when 3.3V logic rail sags due to load dump or EFT. Use Value: 100µs transient immunity rejects EN 61000-4-4 burst noise; 100ms timeout ensures ADC and FPGA re-initialize fully. |
| Smart Utility Meters | Automotive Body Control Units |
|
Use Scenario: AMI meter with dual-supply MCU (3.3V core, 1.8V I/O) powered by supercapacitor backup. IC Role / Device Role / Timing Role: Primary reset supervisor for 3.3V domain, asserting RESET during capacitor discharge below 3.3V. Use Value: Guaranteed operation down to 1.2V VCC allows clean reset assertion even as supercap decays to 1.5V; SC70-3 saves PCB area. |
Use Scenario: BCM module powered from vehicle battery (9V–16V) with LDO generating 3.3V for microcontroller. IC Role / Device Role / Timing Role: Secondary supervision of 3.3V LDO output to catch regulator failure or load dump-induced sag. Use Value: 3.30V threshold matches LDO nominal output; ±2.5% tempco ensures accuracy across -40°C to +85°C under hood conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR33+T | Same 3.3V threshold, push-pull output, 1.2µA ICC, SC70-3 package. | Requires no pull-up but cannot share reset bus; incompatible with bidirectional µP reset pins. | Select when system uses dedicated reset line and needs higher sink/source drive without external components. |
| TPS3808G33DBVR | 3.3V threshold, open-drain output, 2.5µA ICC, SOT23-3 package, 200ms timeout. | Larger package footprint; longer timeout may delay system boot in time-critical applications. | Select when extended reset hold time is acceptable and SOT23-3 layout reuse is prioritized over SC70 size reduction. |
Compared with MAX809TR33+T and TPS3808G33DBVR, the MAX6348XR33+T uniquely balances ultra-low ICC (1µA), SC70-3 miniaturization, and open-drain flexibility-making it optimal for space-constrained, battery-sensitive designs requiring shared reset busing.
Availability
MAX6348XR33+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart utility meters, and automotive body control units requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6348XR33+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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX63xx family delivers ultra-low-power, single-function µP supervisors optimized for battery-operated and space-constrained systems where reliability, small footprint, and minimal quiescent current are critical.
FAQ
What is the exact reset threshold voltage of the MAX6348XR33+T?
The MAX6348XR33+T has a factory-trimmed nominal reset threshold of 3.30V, with tolerance of ±1.5% at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "R33" suffix variant of the MAX6348XR33+T.
Does the MAX6348XR33+T require an external pull-up resistor on the RESET pin?
Yes, the MAX6348XR33+T features an open-drain RESET output and requires an external pull-up resistor to a valid logic rail (e.g., VCC or another supply). Typical values range from 10kΩ to 100kΩ, selected based on rise time requirements and bus loading. This design enables wired-OR reset bus configurations and direct interfacing with bidirectional µP reset pins.
Can the MAX6348XR33+T operate reliably when VCC drops below 2.0V?
Yes, the MAX6348XR33+T is fully specified to operate down to 1.2V VCC across -40°C to +85°C. Its internal circuitry remains functional and asserts RESET correctly even during deep brownout conditions, ensuring deterministic behavior well below typical logic supply levels. This capability is explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics tables.
What is the minimum reset pulse width guaranteed by the MAX6348XR33+T?
The MAX6348XR33+T guarantees a minimum reset pulse width of 100ms after VCC rises above the reset threshold. This timeout is internally generated and independent of external components, ensuring sufficient hold time for microprocessor initialization, clock stabilization, and peripheral readiness before release from reset.
Is the MAX6348XR33+T pin-compatible with other members of the MAX63xx family?
Yes, the MAX6348XR33+T shares identical SC70-3 pinout (GND, RESET, VCC) with all MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 variants. However, output type differs: MAX6348XR33+T is open-drain, while MAX6346XR33+T is push-pull. Swapping requires verifying reset logic polarity and pull-up requirements in the target system.
MAX6348XR33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6348XR33+T FAQ
1.How can I place an order for MAX6348XR33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348XR33+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 MAX6348XR33+T reliable?
The price and inventory of MAX6348XR33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348XR33+T is usually 5 days.
3.What payment methods are accepted for MAX6348XR33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348XR33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348XR33+T?
MAX6348XR33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348XR33+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 MAX6348XR33+T?
For technical support, including MAX6348XR33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348XR33+T requirements.
6.How does Aetrix verify that MAX6348XR33+T is sourced from the original manufacturer or authorized distributors?
All MAX6348XR33+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 MAX6348XR33+T meets industry standards.
7.What is the process for return or replacement of MAX6348XR33+T?
All MAX6348XR33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348XR33+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 MAX6348XR33+T part is unused and in its original packaging.
Return procedure for MAX6348XR33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6348XR33+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…
