My Inquiry
My Account
Analog Devices Inc. ADM8322WC31ARJZR7
- Part No.:
- ADM8322WC31ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8322WC31ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,572
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM8322WC31ARJZR7 from Analog Devices is a supervisory circuit with manual reset input and open-drain active-low reset output, designed for microprocessor voltage monitoring and system reliability in automotive and industrial applications. It features a 3.08 V reset threshold (±1.5% over −40°C to +125°C), 140 ms minimum reset timeout, no watchdog function, and consumes 10 µA typical supply current at 3.6 V.
For engineers reviewing the ADM8322WC31ARJZR7 datasheet, ADM8322WC31ARJZR7 pinout, ADM8322WC31ARJZR7 application, or ADM8322WC31ARJZR7 equivalent, key selection considerations include its dual-reset-output architecture (active-low open-drain and active-high push-pull), automotive qualification (−40°C to +125°C), absence of watchdog timer, and compatibility with low-power embedded systems requiring deterministic reset behavior under brownout conditions.
Technical Context
The ADM8322WC31ARJZR7 implements undervoltage detection using an internal factory-trimmed voltage divider to monitor VCC against a precise 3.08 V threshold, asserting reset when VCC falls below this level or when the manual reset (MR) pin is pulled low. Its dual-output configuration provides both an active-low open-drain RESET and an active-high push-pull RESET, enabling flexible interface with diverse microcontroller reset inputs.
It includes a 75 kΩ internal MR pull-up resistor, 100 ns MR glitch rejection, and guarantees valid reset outputs down to VCC = 0.9 V - with external biasing supporting validity down to 0 V. The device operates across the full automotive temperature range and is RoHS-compliant (Z-suffix) and automotive-qualified (W-suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±1.5% (−40°C to +125°C); ensures reliable power-on reset for 3.3 V systems with margin against brownout. |
| Reset Timeout | 140 ms minimum; provides sufficient hold time for processor initialization after VCC stabilization. |
| Supply Current | 10 µA typical at 3.6 V; enables use in battery-powered or ultra-low-power embedded systems. |
| Operating Temp | −40°C to +125°C; qualified for under-hood automotive and harsh industrial environments. |
| Output Types | Active-low open-drain RESET + active-high push-pull RESET; supports mixed-voltage or legacy MCU reset logic. |
| MR Input | Active-low with 75 kΩ internal pull-up and 100 ns glitch rejection; simplifies push-button reset design without external components. |
| VCC Range | 0.9 V to 5.5 V; reset remains valid during deep brownout, critical for fail-safe system recovery. |
Pinout & Package
ADM8322WC31ARJZR7 is housed in a 5-lead SOT-23 (RJ-5) package, optimized for space-constrained PCB layouts and compatible with standard reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Open-drain output requiring external pull-up; asserts low during VCC undervoltage or MR activation. |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy. |
| 3 | RESET (active-high) | Push-pull output; drives high during normal operation, low only during reset assertion. |
| 4 | MR | Manual reset input; active-low with internal 75 kΩ pull-up; debounced and noise-immune. |
| 5 | VCC | Monitored supply rail; powers device and serves as voltage reference for threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Simultaneous active-low open-drain and active-high push-pull signals enable direct interfacing with MCUs requiring either polarity. |
| Automotive-grade qualification | Qualified per AEC-Q100 requirements for −40°C to +125°C operation, supporting infotainment and body control modules. |
| No-watchdog architecture | Eliminates software strobe overhead and timing dependencies; ideal for safety-critical or simple firmware deployments. |
| Valid reset down to 0.9 V VCC | Ensures deterministic reset assertion even during severe brownout, preventing undefined MCU states. |
| Integrated MR pull-up & filtering | Reduces BOM count by eliminating external resistor and capacitor for basic push-button reset implementation. |
Applications
| Automotive Infotainment Systems | Industrial PLC Controllers |
|---|---|
Use Scenario: Power sequencing and fault recovery in head-unit mainboards with multi-rail supplies. IC Role / Device Role / Timing Role: Monitors 3.3 V core rail and asserts dual reset signals to SoC and auxiliary peripherals upon undervoltage or user-initiated reset. Use Value: Prevents corrupted boot sequences during cold cranking transients by guaranteeing reset validity down to 0.9 V VCC. |
Use Scenario: Reliable restart after power interruption in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Provides 140 ms minimum reset pulse to ensure FPGA and microcontroller complete internal initialization before executing ladder logic. Use Value: Dual-output capability allows one signal to reset the CPU while the other triggers watchdog-independent I/O module reset. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
Use Scenario: Battery-backed operation with low-quiescent-current supervision during sleep mode. IC Role / Device Role / Timing Role: Supervises 3.3 V system rail and interfaces with ARM Cortex-M via active-high push-pull RESET, while open-drain output drives external supervisor logic. Use Value: 10 µA typical supply current extends battery life; automotive temp range supports wide ambient deployment. |
Use Scenario: Tamper-resistant power monitoring in utility meters exposed to outdoor temperature extremes. IC Role / Device Role / Timing Role: Detects grid brownouts on 3.3 V LDO output and initiates secure shutdown/reset sequence via MR-triggered event logging. Use Value: Internal MR pull-up and 100 ns glitch rejection prevent false resets from EMI in high-noise metering environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8319WB31ARJZR7 | Same 3.08 V threshold and 20 ms reset timeout; push-pull dual-output but no open-drain option; no watchdog. | Lacks open-drain output - unsuitable where level translation or wired-OR reset bus is required. | Select when only push-pull outputs are needed and shorter reset pulse suffices. |
| TPS3808G33DBVR | 3.3 V fixed threshold; 200 ms reset timeout; single active-low open-drain output; no active-high output or MR input. | Requires external MR circuitry and cannot drive active-high reset inputs directly. | Choose for cost-sensitive designs where dual outputs and integrated MR are unnecessary. |
Compared with ADM8322WC31ARJZR7, ADM8319WB31ARJZR7 offers identical threshold but shorter reset duration and lacks open-drain flexibility, while TPS3808G33DBVR omits MR integration and dual-output capability - making ADM8322WC31ARJZR7 uniquely suited for robust, minimal-BOM automotive and industrial reset management.
Availability
ADM8322WC31ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC controllers, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADM8322WC31ARJZR7 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, serving precision instrumentation, industrial automation, and automotive markets.
The ADM8322WC31ARJZR7 belongs to the ADM83xx family of automotive-qualified supervisory circuits, engineered specifically for deterministic power monitoring and reset generation in safety-aware embedded systems where watchdog-free operation and dual-output flexibility are essential.
FAQ
What is the reset threshold voltage of ADM8322WC31ARJZR7?
The ADM8322WC31ARJZR7 has a nominal reset threshold of 3.08 V, with tolerance of ±1.5% over the full operating temperature range (−40°C to +125°C). This value is factory-trimmed and specified in Table 9 of the datasheet, ensuring accurate undervoltage detection for 3.3 V systems with adequate margin.
Does ADM8322WC31ARJZR7 include a watchdog timer?
No, ADM8322WC31ARJZR7 does not include a watchdog timer. As confirmed in Table 6 and the "Device Model Options" section, ADM8322 is explicitly defined as having "No" watchdog functionality. Its design focuses on pure voltage supervision and manual reset, making it suitable for applications where software-independent reset assurance is preferred.
What are the reset timeout options available for ADM8322WC31ARJZR7?
The ADM8322WC31ARJZR7 uses the "C" reset timeout option, providing a minimum reset pulse width of 140 ms. This is verified in the Ordering Guide and "Reset Threshold, Minimum Reset Timeout…" table, where ADM8322WC31ARJZR7 is explicitly listed with 140 ms minimum timeout - sufficient for most microcontroller initialization sequences.
What package type and footprint does ADM8322WC31ARJZR7 use?
ADM8322WC31ARJZR7 is packaged in a 5-lead SOT-23 (package option RJ-5), with standardized land pattern dimensions documented in Analog Devices' SOT-23 outline drawings. This compact surface-mount package supports automated assembly and is widely supported in PCB design libraries.
Is ADM8322WC31ARJZR7 qualified for automotive applications?
Yes, ADM8322WC31ARJZR7 is automotive-qualified, indicated by the "W" prefix in its ordering code and explicit listing in the "Automotive Products" section. It meets AEC-Q100 requirements and is rated for operation from −40°C to +125°C, with controlled manufacturing for reliability in automotive infotainment and body electronics.
ADM8322WC31ARJZR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM8322WC31ARJZR7 FAQ
1.How can I place an order for ADM8322WC31ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8322WC31ARJZR7 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 ADM8322WC31ARJZR7 reliable?
The price and inventory of ADM8322WC31ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8322WC31ARJZR7 is usually 5 days.
3.What payment methods are accepted for ADM8322WC31ARJZR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8322WC31ARJZR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8322WC31ARJZR7?
ADM8322WC31ARJZR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8322WC31ARJZR7 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 ADM8322WC31ARJZR7?
For technical support, including ADM8322WC31ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8322WC31ARJZR7 requirements.
6.How does Aetrix verify that ADM8322WC31ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8322WC31ARJZR7 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 ADM8322WC31ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8322WC31ARJZR7?
All ADM8322WC31ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8322WC31ARJZR7, 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 ADM8322WC31ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8322WC31ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM8322WC31ARJZR7 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…
