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Analog Devices Inc. ADM6320CZ29ARJ-RL7
- Part No.:
- ADM6320CZ29ARJ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6320CZ29ARJ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,952
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Product details
Overview
ADM6320CZ29ARJ-RL7 from Analog Devices is a supervisory circuit with integrated watchdog timer and manual reset input, configured as an open-drain active-low RESET output. It monitors 2.93 V supply rails, provides 140 ms minimum reset timeout and 1.6 s typical watchdog timeout, and operates across −40°C to +85°C for industrial microprocessor power-up supervision in portable controllers.
For engineers reviewing the ADM6320CZ29ARJ-RL7 datasheet, ADM6320CZ29ARJ-RL7 pinout, ADM6320CZ29ARJ-RL7 application, or ADM6320CZ29ARJ-RL7 equivalent, key selection criteria include its open-drain RESET output compatibility with mixed-voltage logic systems, guaranteed reset validity down to VCC = 1 V, and glitch-immune manual reset input with internal 52 kΩ pull-up.
Technical Context
The ADM6320CZ29ARJ-RL7 implements a precision voltage reference-based reset generator with hysteresis (3 mV), temperature-compensated threshold (40 ppm/°C), and independent watchdog detection that clears on any WDI logic transition ≥50 ns. Its reset assertion is triggered by VCC falling below 2.93 V (±2.5% over temperature), MR low pulse ≥1 µs, or WDI inactivity exceeding 1.6 s.
Unlike push-pull variants, this device uses an open-drain RESET output requiring an external pull-up resistor (typically 10 kΩ) to a rail ≤6 V, enabling level-shifting and wired-OR configurations. The manual reset input features on-chip debounce and rejects transients <100 ns, while supply current remains ≤12 µA at 3.6 V and −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±2.5% over −40°C to +85°C - ensures reliable brownout detection for 3.3 V systems with margin |
| Reset Timeout | 140 ms minimum - guarantees sufficient hold time for microprocessor initialization after power stabilization |
| Watchdog Timeout | 1.6 s typical - balances fault detection responsiveness against false triggers during long firmware routines |
| Supply Current | ≤12 µA at 3.6 V - enables integration into battery-powered portable equipment without significant drain |
| RESET Output Type | Open-drain active low - supports interface to multiple logic families via external pull-up and enables shared reset bus |
| VCC Operating Range | 1 V to 5.5 V - allows valid reset assertion even during deep brownout conditions down to 1 V |
| MR Input Pull-Up | 52 kΩ internal - eliminates need for external resistor when using push-button reset, simplifying BOM |
Pinout & Package
ADM6320CZ29ARJ-RL7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.8–3.0 mm body length. Pin 1 is RESET (open-drain active low), Pin 2 is GND, Pin 3 is MR (active low manual reset), Pin 4 is WDI (watchdog input), and Pin 5 is VCC (monitored supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Requires external pull-up; sinks current to assert reset; compatible with 1.8 V–5 V logic rails |
| 2 - GND | Ground reference | Common return path for internal reference, watchdog, and reset circuits |
| 3 - MR | Active-low manual reset input | Internal 52 kΩ pull-up; accepts 1 µs minimum low pulse; debounced and noise-immune |
| 4 - WDI | Watchdog input | Clears watchdog timer on any edge ≥50 ns; floating disables watchdog function |
| 5 - VCC | Monitored supply voltage input | Input for reset threshold comparison; supports operation down to 1 V with valid RESET output |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity to VCC = 1 V | Ensures deterministic system reset behavior during deep undervoltage events, critical for fail-safe embedded control |
| 40 ppm/°C reset threshold tempco | Maintains tight threshold accuracy across industrial temperature range, reducing design margin requirements |
| 100 ns MR input glitch rejection | Eliminates false resets from board-level noise or switch bounce without external RC filtering |
| 5 µA typical quiescent current | Enables always-on supervision in energy-constrained applications such as IoT sensors and wearables |
| 3 mV reset hysteresis | Prevents oscillatory reset assertion near threshold crossing, improving system stability during slow VCC ramps |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Supervises 3.3 V microcontroller power rail in DIN-rail mounted programmable logic controller exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Voltage supervisor with watchdog and manual reset; asserts open-drain RESET until VCC exceeds 2.93 V and stabilizes for ≥140 ms. Use Value: Prevents erratic program execution during factory floor voltage sags and enables field service reset via front-panel button. |
Use Scenario: Monitors battery-backed 3.3 V supply in handheld ECG device with sleep/wake cycles and intermittent sensor activation. IC Role / Device Role / Timing Role: Low-power supervisor ensuring MCU reset on battery insertion and detecting firmware hangs via 1.6 s watchdog timeout. Use Value: Extends battery life with 5 µA quiescent current while guaranteeing safe restart after brownout or software lockup. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Provides power-on reset and code integrity monitoring for metrology SoC in ANSI C12.20-compliant electricity meter operating from 3.3 V LDO. IC Role / Device Role / Timing Role: Open-drain RESET interfaces directly to SoC's multi-voltage reset input; MR pin connects to tamper-detection switch. Use Value: Enables secure, standards-compliant power sequencing and field-initiated diagnostics without PCB layout changes. |
Use Scenario: Supervises 3.3 V domain in non-safety-critical body electronics module (e.g., power window controller) subjected to automotive load dump transients. IC Role / Device Role / Timing Role: Resets microcontroller upon VCC dip below 2.93 V; WDI tied to GPIO toggled every 500 ms in main loop. Use Value: Detects firmware crashes caused by EMI-induced bit flips while surviving fast VCC glitches up to 100 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM6320CY29ARJZ-R7 | Same 2.93 V threshold, 140 ms reset timeout, 1.6 s watchdog timeout; differs only in reel packaging (R7 vs RL7) and marking code (N0T vs N04) | Identical electrical and thermal performance; suitable for same PCB footprint and schematic | Select when standard 3,000-piece RoHS-compliant reel (R7) is preferred over RL7 variant |
| TPS3808G33DBVR | 3.3 V fixed threshold, 200 ms reset timeout, no watchdog; push-pull active-low RESET; 2.5 µA IQ | Lacks watchdog and manual reset; suited for simpler power-monitoring-only use cases | Choose where watchdog functionality is unnecessary and lowest possible quiescent current is prioritized |
Compared with ADM6320CZ29ARJ-RL7, ADM6320CY29ARJZ-R7 offers identical supervision functionality with minor packaging variation, while TPS3808G33DBVR trades watchdog capability for ultra-low power and fixed threshold-making it appropriate only for basic reset needs without code-execution monitoring.
Availability
ADM6320CZ29ARJ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for ADM6320CZ29ARJ-RL7 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM6320 belongs to Analog Devices' supervisory IC product line, designed specifically for robust power-on reset, brownout protection, and watchdog-based firmware integrity monitoring in industrial and portable microprocessor systems.
FAQ
What is the exact reset threshold voltage of ADM6320CZ29ARJ-RL7 and how does it vary with temperature?
The ADM6320CZ29ARJ-RL7 has a nominal reset threshold of 2.93 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, meaning threshold drift is bounded and predictable-e.g., maximum deviation is approximately ±11.7 mV across the range-enabling accurate system-level brownout margining without additional calibration.
Does ADM6320CZ29ARJ-RL7 require an external pull-up resistor on the RESET pin, and what value is recommended?
Yes, ADM6320CZ29ARJ-RL7 features an open-drain RESET output and requires an external pull-up resistor. A 10 kΩ resistor to a logic rail ≤6 V is recommended per the datasheet, as it ensures proper logic-high levels while limiting sink current to <0.5 mA during reset assertion-compatible with most microcontroller reset inputs and supporting wired-OR configurations.
How does the manual reset (MR) input of ADM6320CZ29ARJ-RL7 behave during power-up and under noise conditions?
The MR input of ADM6320CZ29ARJ-RL7 has an internal 52 kΩ pull-up, keeping it high by default. It accepts a minimum 1 µs low pulse to trigger reset and rejects transients <100 ns, preventing false resets from EMI or switch bounce. During power-up, MR remains functional down to VCC = 1 V, ensuring field-service reset capability even during brownout.
Can the watchdog timer in ADM6320CZ29ARJ-RL7 be disabled, and if so, how?
Yes, the watchdog timer in ADM6320CZ29ARJ-RL7 can be disabled by leaving the WDI pin unconnected (floating). The internal window comparator disconnects the watchdog from the reset circuitry in this state, ensuring no spurious resets occur due to timeout. Alternatively, tri-stating the WDI driver achieves the same effect without routing the pin.
What is the supply current consumption of ADM6320CZ29ARJ-RL7 at 3.3 V and room temperature?
At 3.3 V and +25°C, ADM6320CZ29ARJ-RL7 consumes ≤5 µA typical supply current, with a maximum of 12 µA over temperature and process variation. This ultra-low quiescent current makes it suitable for always-on supervision in battery-powered applications where standby power budget is constrained to single-digit microamps.
ADM6320CZ29ARJ-RL7 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM6320CZ29ARJ-RL7 FAQ
1.How can I place an order for ADM6320CZ29ARJ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6320CZ29ARJ-RL7 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 ADM6320CZ29ARJ-RL7 reliable?
The price and inventory of ADM6320CZ29ARJ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6320CZ29ARJ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM6320CZ29ARJ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6320CZ29ARJ-RL7 transactions.
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Once your ADM6320CZ29ARJ-RL7 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 ADM6320CZ29ARJ-RL7?
For technical support, including ADM6320CZ29ARJ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6320CZ29ARJ-RL7 requirements.
6.How does Aetrix verify that ADM6320CZ29ARJ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6320CZ29ARJ-RL7 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 ADM6320CZ29ARJ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6320CZ29ARJ-RL7?
All ADM6320CZ29ARJ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6320CZ29ARJ-RL7, 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 ADM6320CZ29ARJ-RL7 part is unused and in its original packaging.
Return procedure for ADM6320CZ29ARJ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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