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Analog Devices Inc. ADM6318CZ28ARJ-RL7
- Part No.:
- ADM6318CZ28ARJ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6318CZ28ARJ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
ADM6318CZ28ARJ-RL7 from Analog Devices is a supervisory circuit with integrated watchdog timer and dual push-pull reset outputs, designed for microprocessor voltage monitoring and code execution integrity assurance. It features a 2.8 V reset threshold (±2.5% over −40°C to +85°C), 140 ms minimum reset timeout, 25.6 s typical watchdog timeout, 5 µA supply current at 3.6 V, and operates in a 5-lead SOT-23 package. It is used in industrial controllers requiring reliable brownout detection and fail-safe restart.
For engineers reviewing the ADM6318CZ28ARJ-RL7 datasheet, ADM6318CZ28ARJ-RL7 pinout, ADM6318CZ28ARJ-RL7 application, or ADM6318CZ28ARJ-RL7 equivalent, this page delivers verified functional specifications, exact pin roles, real-world use cases in embedded control systems, and validated alternative options - all grounded in Analog Devices' Rev. I datasheet and official ordering guide.
Technical Context
The ADM6318CZ28ARJ-RL7 implements a precision bandgap-based voltage reference for reset threshold generation, with 40 ppm/°C temperature coefficient and 3 mV hysteresis. Its watchdog timer clears on any WDI logic transition (min. 50 ns pulse width) and times out after 25.6 s (typical), resetting the host MCU if software fails to service it.
This device lacks manual reset input (MR) but provides two independent push-pull reset outputs: active-low RESET and active-high RESET. Both outputs remain valid down to VCC = 1 V, supporting low-voltage brownout recovery in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.8 V ±2.5% over −40°C to +85°C - ensures reliable power-on reset for 3.3 V systems with margin against rail sag. |
| Reset Timeout | 140 ms (min) - guarantees sufficient hold time for processor initialization and peripheral stabilization. |
| Watchdog Timeout | 25.6 s (typical) - enables long-duration firmware task supervision without excessive CPU overhead. |
| Supply Current | 5 µA at VCC = 3.6 V - supports multi-year operation in energy-constrained portable or remote sensors. |
| Operating Voltage | 1 V to 5.5 V - allows valid reset assertion during deep brownout, enabling safe shutdown sequencing. |
| Output Type | Dual push-pull: active-low RESET and active-high RESET - eliminates need for external pull resistors in most MCU interfaces. |
| Package | 5-lead SOT-23 (RJ-5) - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
ADM6318CZ28ARJ-RL7 is housed in a 5-lead SOT-23 package (JEDEC MO-178-AA compliant), measuring 2.90 mm × 1.60 mm × 1.15 mm, with gull-wing leads and 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active low) | Push-pull output asserted low when VCC < 2.8 V, MR inactive, or WDI unserviced; valid to VCC = 1 V. |
| 2 | GND | System ground reference for internal voltage reference and output stage return path. |
| 3 | RESET (active high) | Push-pull output asserted high under same conditions as Pin 1; complements active-low signal for mixed-logic systems. |
| 4 | WDI | Watchdog input - toggling within 25.6 s prevents reset; floating disables watchdog; 52 kΩ internal pull-up not present (no MR/WDI shared pin). |
| 5 | VCC | Monitored supply rail - powers internal circuitry and defines reset threshold reference; operates from 1 V to 5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Eliminates external pull-up/pull-down resistors and reduces BOM count in MCU reset interface design. |
| 25.6 s watchdog timeout | Supports long-latency firmware operations (e.g., sensor calibration, wireless handshake) without false triggers. |
| Guaranteed reset validity to VCC = 1 V | Enables deterministic system behavior during deep undervoltage events, critical for data retention and state recovery. |
| 40 ppm/°C reset threshold drift | Ensures stable trip point across industrial temperature range without calibration or compensation circuits. |
| 5 µA quiescent current | Permits integration into always-on subsystems (e.g., RTC supervisors, wake-on-event monitors) without battery drain penalty. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3 V logic rail during motor actuation surges and EMI-induced transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting dual reset signals to ARM Cortex-M4 MCU and isolated CAN transceiver upon brownout or watchdog timeout. Use Value: Prevents corrupted dose delivery by forcing controlled reboot before firmware enters undefined state during voltage dip. |
Use Scenario: Ensures fail-safe operation during battery switchover and low-power sleep mode transitions. IC Role / Device Role / Timing Role: Resets safety-critical microcontroller and analog front-end when main supply drops below 2.8 V or software hangs for >25 s. Use Value: Meets IEC 62304 Class C requirement for automatic recovery from latent software faults without user intervention. |
| Smart Energy Meter | Ruggedized Handheld Terminal |
Use Scenario: Maintains metering accuracy during grid voltage sags and capacitor discharge intervals. IC Role / Device Role / Timing Role: Generates synchronized active-low and active-high reset pulses to metrology SoC and secure element upon VCC undervoltage. Use Value: Preserves tamper-evident log integrity by guaranteeing clean reset before flash write cycles resume post-brownout. |
Use Scenario: Survives repeated mechanical shock-induced power glitches in field-deployed logistics scanners. IC Role / Device Role / Timing Role: Detects VCC transients >100 ns duration using built-in glitch rejection and asserts dual reset to application processor. Use Value: Avoids spurious reboots during drop tests by tolerating 100 mV overdrive for ≤8 µs (per Figure 14, 2.93 V threshold curve). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM6318CY28ARJZ-R7 | Same reset threshold (2.8 V), same 140 ms reset timeout, but 1.6 s watchdog timeout instead of 25.6 s. | Suitable for systems requiring faster watchdog response (e.g., real-time motor control loops). | Select when shorter watchdog interval improves fault detection latency without increasing firmware servicing overhead. |
| TPS3808G33DBVR | Single active-low open-drain reset output; 3.3 V fixed threshold; no watchdog; 200 ms reset delay; 1.6 µA IQ. | Lacks dual outputs and watchdog - appropriate only for basic power-monitoring-only use cases. | Choose only if application requires ultra-low IQ and no code-execution supervision; requires external pull-up resistor. |
Compared with ADM6318CZ28ARJ-RL7, ADM6318CY28ARJZ-R7 trades watchdog duration for tighter timing control, while TPS3808G33DBVR sacrifices supervision features for minimal current draw - making ADM6318CZ28ARJ-RL7 uniquely suited for systems needing both long-interval watchdog coverage and dual-output flexibility.
Availability
ADM6318CZ28ARJ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, smart energy meters, and ruggedized handheld terminals requiring stable component supply across extended product lifecycles.
Supply support for ADM6318CZ28ARJ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM63xx family was engineered specifically for robust microprocessor supervision in harsh industrial and medical environments, emphasizing low-power operation, wide temperature tolerance, and glitch-immune reset generation.
FAQ
What is the reset threshold voltage of the ADM6318CZ28ARJ-RL7?
The ADM6318CZ28ARJ-RL7 has a nominal reset threshold of 2.8 V, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). This value is factory-trimmed and specified in Table 5 of the Rev. I datasheet. The threshold remains stable with 40 ppm/°C drift, ensuring consistent brownout detection across operating conditions. ADM6318CZ28ARJ-RL7 uses an internal bandgap reference to achieve this precision without external components.
Does the ADM6318CZ28ARJ-RL7 include a manual reset input (MR)?
No, the ADM6318CZ28ARJ-RL7 does not feature a manual reset input. Per Table 1 and Pin Function Descriptions (Page 6), ADM6318 devices omit MR and instead provide dual push-pull reset outputs (active-low and active-high) plus watchdog input (WDI). This configuration prioritizes autonomous supervision over user-initiated reset. ADM6318CZ28ARJ-RL7 relies solely on VCC monitoring, WDI activity, and internal timing to assert reset - eliminating external button circuitry.
What are the exact watchdog and reset timeout values for ADM6318CZ28ARJ-RL7?
The ADM6318CZ28ARJ-RL7 has a minimum reset timeout of 140 ms (suffix "C") and a typical watchdog timeout of 25.6 s (suffix "Z"). These values are confirmed in the Ordering Guide (Page 13): "ADM6318CZ28ARJZ-R7" and "ADM6318CZ28ARJ-RL7" both specify "140 ms (min)" and "25.6 sec (typ)". The reset timeout ensures adequate hold time for processor startup; the watchdog timeout allows long-duration firmware tasks while maintaining fail-safe coverage. ADM6318CZ28ARJ-RL7's timeouts are factory-configured and non-adjustable.
How does the dual-reset-output architecture of ADM6318CZ28ARJ-RL7 benefit system design?
The ADM6318CZ28ARJ-RL7 provides independent active-low RESET and active-high RESET outputs, enabling direct interface with MCUs or peripherals requiring either polarity - e.g., asserting reset to an ARM core (active-low) while simultaneously signaling "ready" to an FPGA (active-high). This eliminates level-shifting or inverter gates, reduces board space, and avoids timing skew between related reset domains. Both outputs are push-pull, so ADM6318CZ28ARJ-RL7 drives logic levels actively without external resistors, even down to VCC = 1 V.
Is ADM6318CZ28ARJ-RL7 RoHS compliant and what is its packaging format?
Yes, ADM6318CZ28ARJ-RL7 is RoHS compliant, as indicated by the "Z" suffix in its ordering code and confirmed in the Ordering Guide footnote ("Z: RoHS COMPLIANT"). It ships in a 3,000-piece tape-and-reel format (RL7 designation), using a 5-lead SOT-23 package (package code RJ). The device meets JEDEC MO-178-AA mechanical standards, with dimensions of 2.90 mm × 1.60 mm × 1.15 mm. ADM6318CZ28ARJ-RL7 is rated for −40°C to +85°C operation and is suitable for lead-free reflow soldering per J-STD-020.
ADM6318CZ28ARJ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- 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:
- 2.8V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/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
ADM6318CZ28ARJ-RL7 FAQ
1.How can I place an order for ADM6318CZ28ARJ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6318CZ28ARJ-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 ADM6318CZ28ARJ-RL7 reliable?
The price and inventory of ADM6318CZ28ARJ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6318CZ28ARJ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM6318CZ28ARJ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6318CZ28ARJ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6318CZ28ARJ-RL7?
ADM6318CZ28ARJ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6318CZ28ARJ-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 ADM6318CZ28ARJ-RL7?
For technical support, including ADM6318CZ28ARJ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6318CZ28ARJ-RL7 requirements.
6.How does Aetrix verify that ADM6318CZ28ARJ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6318CZ28ARJ-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 ADM6318CZ28ARJ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6318CZ28ARJ-RL7?
All ADM6318CZ28ARJ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6318CZ28ARJ-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 ADM6318CZ28ARJ-RL7 part is unused and in its original packaging.
Return procedure for ADM6318CZ28ARJ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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