My Inquiry
My Account
Analog Devices Inc. ADM6346-38ARTZ-R7
- Part No.:
- ADM6346-38ARTZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM6346-38ARTZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM6346-38ARTZ-R7 from Analog Devices is a precision microprocessor reset circuit with push-pull active-low RESET output, 3.8 V reset threshold (±2.5% over −40°C to +85°C), 100 ms minimum reset timeout, and ultralow 1 µA max supply current at 3.3 V. It monitors 3.3–5 V rails in portable microprocessor systems requiring brownout protection and glitch-immune power-up sequencing.
For engineers reviewing the ADM6346-38ARTZ-R7 datasheet, ADM6346-38ARTZ-R7 pinout, ADM6346-38ARTZ-R7 application, or ADM6346-38ARTZ-R7 equivalent, key selection criteria include reset threshold accuracy, push-pull drive capability without external pull-up, operation down to 1 V VCC, and SOT-23-3 footprint compatibility for space-constrained embedded designs.
Technical Context
The ADM6346-38ARTZ-R7 implements a precision bandgap-based voltage reference and comparator with built-in hysteresis (9.5 mV) to reject noise and negative-going VCC transients. Its internal 100–280 ms reset timeout timer ensures reliable microprocessor initialization after power-up or brownout recovery.
Unlike open-drain variants (e.g., ADM6348-38ARTZ-R7), this device features a push-pull RESET output capable of sourcing up to 800 µA at VCC ≥ 4.5 V and sinking 1.6 mA while maintaining VOL ≤ 0.3 V - eliminating need for external pull-up resistors in most host interface configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.8 V ±2.5% (−40°C to +85°C); ensures reliable detection of 3.3 V/5 V rail undervoltage before system instability occurs. |
| Supply Current (ICC) | 1.0 µA max at 3.3 V; enables multi-year battery life in always-on portable equipment monitoring logic supplies. |
| Reset Timeout Period | 100–280 ms; guarantees microprocessor remains held in reset until power rails stabilize post-power-up. |
| Operating Voltage Range | 1.0 V to 5.5 V; allows valid RESET assertion even during deep brownout conditions down to 1 V VCC. |
| RESET Output Type | Active-low push-pull; drives low without external components and sources/sinks sufficient current for direct MCU reset pin interfacing. |
| Hysteresis | 9.5 mV; prevents oscillatory reset toggling near threshold due to supply ripple or noise. |
| Temperature Range | −40°C to +85°C; qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
ADM6346-38ARTZ-R7 is housed in a JEDEC-compliant 3-lead SOT-23-3 (RT-3) package with 270°C/W junction-to-ambient thermal resistance, optimized for compact PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal reference and comparator; must be connected directly to system ground plane. |
| RESET (Pin 2) | Active-low push-pull output | Drives low when VCC < 3.8 V; holds low for ≥100 ms after VCC rises above threshold; sinks 1.6 mA min at VCC > 2.1 V. |
| VCC (Pin 3) | Monitored supply input | Input voltage source being supervised; device operates and asserts RESET down to 1.0 V on this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow ICC | 1 µA max at 3.3 V enables integration into energy-harvesting and coin-cell-powered systems without measurable battery drain. |
| Glitch immunity | Rejects negative VCC transients up to 200 mV overdrive for durations ≤1 µs - prevents spurious resets during switching noise events. |
| Push-pull RESET | Eliminates need for external pull-up resistor, reducing BOM count and layout area versus open-drain alternatives like ADM6348-38ARTZ-R7. |
| 1 V operation | Continues asserting RESET down to VCC = 1.0 V, ensuring full reset coverage during deep brownout or fast power collapse. |
| 14-threshold family | Part of ADM6346 series offering 3.3–4.63 V thresholds in 0.1 V increments - simplifies design reuse across multiple supply rails. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor operating from a 3.7 V Li-ion cell with aging-induced voltage sag. IC Role / Device Role / Timing Role: Monitors main 3.3 V LDO output and asserts RESET if voltage drops below 3.8 V during discharge or cold temperature. Use Value: Prevents firmware corruption by holding MCU in reset until regulated supply recovers, leveraging 1 µA ICC to extend battery runtime. |
Use Scenario: DIN-rail mounted PLC module powered from 24 V DC converted to 5 V/3.3 V, exposed to industrial line transients. IC Role / Device Role / Timing Role: Supervises 3.3 V logic rail and provides glitch-immune reset pulse during 24 V input dips or EFT bursts. Use Value: 9.5 mV hysteresis and 20 µs response time ensure deterministic reset without chatter during noisy factory environments. |
| Network Edge Routers | Automotive Infotainment Head Units |
|
Use Scenario: Dual-rail 5 V/3.3 V power architecture in fanless edge router with thermal throttling affecting regulator stability. IC Role / Device Role / Timing Role: Resets ARM Cortex-A53 SoC when 3.3 V rail falls below 3.8 V due to thermal shutdown of upstream DC/DC converter. Use Value: 100–280 ms timeout accommodates slow regulator recovery while push-pull output interfaces directly to SoC's dedicated reset pin. |
Use Scenario: 12 V automotive battery-supplied infotainment unit with wide-input buck converter feeding 3.3 V domain. IC Role / Device Role / Timing Role: Detects cold-crank brownout (VCC dip to ~2.5 V) and holds application processor in reset until stable 3.3 V resumes. Use Value: Valid operation down to 1.0 V VCC ensures continuous supervision through worst-case cranking events, preventing boot failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM6348-38ARTZ-R7 | Same 3.8 V threshold and SOT-23-3 package, but open-drain RESET output requiring external pull-up resistor. | Suitable where bidirectional reset control (e.g., MCU-initiated reset) is needed; incompatible with direct push-pull drive requirements. | Select ADM6348-38ARTZ-R7 only if system design mandates open-drain sharing of RESET bus with other devices. |
| MAX6326–T38+T | 3.8 V threshold, push-pull output, but higher 2.5 µA max ICC and narrower −40°C to +85°C temp range with reduced brownout margin below 1.2 V. | Acceptable for cost-sensitive consumer electronics where 1 µA ultra-low ICC is not required and 1 V operation is unnecessary. | Choose MAX6326–T38+T only when legacy Maxim footprint compatibility is mandatory and ultralow ICC is secondary. |
Compared with ADM6348-38ARTZ-R7, ADM6346-38ARTZ-R7 eliminates pull-up components and reduces board area; compared with MAX6326–T38+T, it delivers superior battery life and deeper brownout coverage - making it optimal for high-reliability portable and industrial systems.
Availability
ADM6346-38ARTZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, network edge routers, and automotive infotainment head units requiring stable component supply with guaranteed long-term availability.
Supply support for ADM6346-38ARTZ-R7 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The ADM6346 series belongs to Analog Devices' Single-Supply Microprocessor Supervisory Circuits product line, engineered specifically for reliable power-on reset, brownout detection, and glitch immunity in battery-powered and industrial embedded systems.
FAQ
What is the exact reset threshold voltage of ADM6346-38ARTZ-R7 and how tightly is it specified?
The ADM6346-38ARTZ-R7 has a nominal reset threshold of 3.8 V, specified as 3.743 V (min) to 3.857 V (max) at 25°C, and 3.705 V (min) to 3.895 V (max) over the full −40°C to +85°C operating range - representing ±2.5% tolerance across temperature. This tight specification ensures consistent brownout detection across environmental conditions without calibration.
Does ADM6346-38ARTZ-R7 require an external pull-up resistor on its RESET pin?
No, ADM6346-38ARTZ-R7 does not require an external pull-up resistor because it features an active-low push-pull RESET output. The device actively drives the RESET line high (VOH ≥ 0.8 × VCC) and low (VOL ≤ 0.3 V at 1.6 mA sink), enabling direct connection to microprocessor reset inputs without additional components - unlike open-drain variants such as ADM6348-38ARTZ-R7.
Can ADM6346-38ARTZ-R7 operate when the monitored supply voltage drops below 2.0 V?
Yes, ADM6346-38ARTZ-R7 remains fully functional and continues asserting RESET down to VCC = 1.0 V. Its internal circuitry maintains valid comparator operation and push-pull output drive capability even at 1.0 V, providing complete brownout coverage for applications experiencing severe supply collapse - a critical feature absent in many competing supervisory ICs.
What is the reset timeout duration of ADM6346-38ARTZ-R7 and is it adjustable?
The ADM6346-38ARTZ-R7 provides a fixed minimum reset timeout of 100 ms, with typical duration of 185 ms and maximum of 280 ms over temperature. This timing is internally generated and non-adjustable - designed to guarantee sufficient hold time for microprocessor power stabilization without external RC networks or configuration pins.
How does ADM6346-38ARTZ-R7 handle fast voltage transients on the VCC line?
ADM6346-38ARTZ-R7 incorporates built-in glitch immunity that rejects negative-going VCC transients up to 200 mV amplitude for pulse widths under 1 µs, as verified in Figure 5 of the datasheet. This prevents false resets caused by switching noise or EFT events, ensuring robust operation in electrically noisy environments like motor drives or industrial power systems.
ADM6346-38ARTZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.8V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM6346-38ARTZ-R7 FAQ
1.How can I place an order for ADM6346-38ARTZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6346-38ARTZ-R7 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 ADM6346-38ARTZ-R7 reliable?
The price and inventory of ADM6346-38ARTZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6346-38ARTZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6346-38ARTZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6346-38ARTZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6346-38ARTZ-R7?
ADM6346-38ARTZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6346-38ARTZ-R7 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 ADM6346-38ARTZ-R7?
For technical support, including ADM6346-38ARTZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6346-38ARTZ-R7 requirements.
6.How does Aetrix verify that ADM6346-38ARTZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6346-38ARTZ-R7 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 ADM6346-38ARTZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6346-38ARTZ-R7?
All ADM6346-38ARTZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6346-38ARTZ-R7, 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 ADM6346-38ARTZ-R7 part is unused and in its original packaging.
Return procedure for ADM6346-38ARTZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM6346-38ARTZ-R7 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…
