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Analog Devices Inc. ADM809-5LARTZ-RL7
- Part No.:
- ADM809-5LARTZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM809-5LARTZ-RL7.pdf
- Description:
- IC SUPERVISOR MPU 4.63V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,102
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Product details
Overview
ADM809-5LARTZ-RL7 from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.63 V reset threshold, and operation down to 1 V VCC. It provides 240 ms minimum power-on reset timeout, consumes 17 μA typical supply current, and is qualified for −40°C to +125°C industrial/automotive applications in SOT-23-3 package.
For engineers reviewing the ADM809-5LARTZ-RL7 datasheet, ADM809-5LARTZ-RL7 pinout, ADM809-5LARTZ-RL7 application, or ADM809-5LARTZ-RL7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), guaranteed reset assertion below 1 V VCC, push-pull drive capability (3.2 mA sink at VTH min), and compatibility with 3 V/5 V microprocessor systems requiring stable brownout detection.
Technical Context
The ADM809-5LARTZ-RL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains ±1.5% threshold accuracy across −40°C to +125°C, enabling reliable power-up sequencing in automotive control units and industrial PLCs where supply rails degrade under load or temperature stress.
Unlike open-drain variants (e.g., ADM803), the ADM809-5LARTZ-RL7 uses a push-pull output stage capable of sinking 3.2 mA at VTH min while maintaining VOL ≤ 0.4 V - eliminating external pull-up requirements and ensuring deterministic logic levels during low-VCC conditions down to 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V nominal, ±1.5% over −40°C to +125°C - ensures accurate 5 V rail monitoring despite thermal drift. |
| Reset Timeout | 240 ms typical power-on delay - holds microprocessor in reset until 5 V supply stabilizes post-power-up. |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables use in battery-backed or ultra-low-power embedded systems. |
| VCC Operating Range | 1.0 V to 5.5 V - guarantees reset assertion during deep brownout events before system collapse. |
| Output Type | Push-pull active-low RESET - drives CMOS/TTL inputs directly without external components. |
| Reset Output Drive | Sinks 3.2 mA at VTH min with VOL ≤ 0.4 V - ensures robust noise margin in noisy industrial environments. |
Pinout & Package
ADM809-5LARTZ-RL7 is housed in a RoHS-compliant 3-lead SOT-23 (RT-3) package with 1.3 mm × 2.9 mm footprint and 0.95 mm height, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | 0 V return path for internal comparator and reset generator; must be connected to system ground plane. |
| 2 (RESET) | Active-Low Push-Pull Output | Drives low during reset condition; actively pulls high when deasserted - no external pull-up required. |
| 3 (VCC) | Monitored Supply Input | Connects to 5 V rail being supervised; internally powers comparator and timer - functional down to 1 V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision Voltage Monitoring | 4.63 V threshold with ±1.5% tolerance over full −40°C to +125°C range - eliminates need for external trimming in 5 V systems. |
| Brownout Detection | Asserts RESET down to 1 V VCC - detects failing supplies earlier than standard 5 V supervisors with 4.5 V thresholds. |
| Glitch-Immune Comparator | Rejects transients up to 100 mV overdrive for ≤200 μs - prevents false resets from switching noise on power rails. |
| Low-Power Operation | 17 μA typical quiescent current - extends battery life in portable instrumentation and remote sensors. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitors 5 V microcontroller supply during cold cranking, where battery voltage dips to 6–9 V causing regulator output sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until 5 V rail recovers and remains stable for ≥240 ms. Use Value: Prevents ECU firmware corruption by blocking processor execution until power integrity is confirmed post-dip. | Use Scenario: Ensures deterministic startup of ARM-based PLC CPU after AC/DC power interruption in factory automation. IC Role / Device Role / Timing Role: Generates 240 ms power-on reset pulse synchronized to 5 V rail stabilization, independent of FPGA configuration time. Use Value: Eliminates race conditions between CPU boot sequence and I/O peripheral initialization. |
| Medical Infusion Pump Controller | Ruggedized Handheld Test Equipment |
Use Scenario: Detects brownout during battery swap in battery-powered infusion pumps operating from 5 V DC-DC converter. IC Role / Device Role / Timing Role: Active-low RESET output forces microcontroller into safe shutdown state when VCC falls below 4.56 V. Use Value: Guarantees motor stop and valve closure before power loss compromises patient safety. | Use Scenario: Maintains reliable reset behavior during repeated hot-plug events of Li-ion battery packs in field service tools. IC Role / Device Role / Timing Role: Push-pull output drives reset input of Cortex-M4 MCU directly, avoiding pull-up resistor failure modes. Use Value: Enables >100,000 insertion cycles without degradation in reset timing or logic level integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 4.63 V threshold, 200 ms reset timeout, 2.5 μA max supply current - lower IQ but shorter timeout. | Optimized for ultra-low-power wearables; insufficient hold time for complex boot sequences requiring ≥240 ms. | Select MAX809TRD2T only if system boot completes within 200 ms and quiescent current < 3 μA is mandatory. |
| TPS3808G33DBVR | 3.3 V threshold, adjustable delay via capacitor, 1.5 μA IQ - mismatched threshold and programmable timing. | Requires external RC network for timing; not drop-in for fixed 4.63 V 5 V rail monitoring. | Choose TPS3808G33DBVR only when design requires configurable reset duration and 3.3 V supervision. |
Compared with MAX809TRD2T and TPS3808G33DBVR, the ADM809-5LARTZ-RL7 delivers guaranteed 240 ms reset hold time and precise 4.63 V threshold without external components - making it the optimal choice for legacy 5 V microprocessor systems where timing determinism and voltage accuracy are non-negotiable.
Availability
ADM809-5LARTZ-RL7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809-5LARTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM809-5LARTZ-RL7 belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation and brownout protection in harsh-environment embedded systems operating from 1 V to 5.5 V.
FAQ
What is the exact reset threshold voltage of ADM809-5LARTZ-RL7 and how does it vary with temperature?
The ADM809-5LARTZ-RL7 has a nominal reset threshold of 4.63 V, with guaranteed limits of 4.44 V to 4.82 V over −40°C to +125°C. This ±1.5% tolerance ensures reliable 5 V rail supervision across automotive and industrial temperature extremes without calibration. The device's internal reference exhibits 30 ppm/°C temperature coefficient, contributing to tight threshold stability.
Does ADM809-5LARTZ-RL7 require an external pull-up resistor on the RESET pin?
No, ADM809-5LARTZ-RL7 features a push-pull RESET output that actively drives both high and low states - eliminating the need for an external pull-up resistor. This simplifies PCB layout, reduces BOM count, and ensures deterministic logic levels even during brownout conditions where open-drain alternatives would float.
What is the minimum VCC voltage at which ADM809-5LARTZ-RL7 continues to assert RESET?
The ADM809-5LARTZ-RL7 asserts RESET down to 1.0 V VCC, as specified in its absolute operating range. This capability enables early brownout detection well before most 5 V regulators lose regulation, providing critical headroom for safe system shutdown in automotive and industrial applications.
How does the 240 ms reset timeout of ADM809-5LARTZ-RL7 improve system reliability compared to shorter timeouts?
The 240 ms minimum power-on reset timeout of ADM809-5LARTZ-RL7 ensures microprocessors complete internal clock stabilization, PLL lock, and memory initialization before release. Shorter timeouts (e.g., 140 ms or 200 ms) risk premature release during marginal power-up conditions, leading to undefined boot states - a failure mode eliminated by ADM809-5LARTZ-RL7's guaranteed 240 ms hold time.
Is ADM809-5LARTZ-RL7 RoHS compliant and what package does it use?
Yes, ADM809-5LARTZ-RL7 is RoHS compliant (indicated by the "Z" suffix) and packaged in a 3-lead SOT-23 (RT-3) outline measuring 2.9 mm × 1.3 mm × 0.95 mm. This compact, surface-mount package supports automated assembly and meets JEDEC TO-236-AB standards for thermal and mechanical reliability.
ADM809-5LARTZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 30ms Minimum
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM809-5LARTZ-RL7 FAQ
1.How can I place an order for ADM809-5LARTZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809-5LARTZ-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 ADM809-5LARTZ-RL7 reliable?
The price and inventory of ADM809-5LARTZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809-5LARTZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM809-5LARTZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809-5LARTZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809-5LARTZ-RL7?
ADM809-5LARTZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809-5LARTZ-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 ADM809-5LARTZ-RL7?
For technical support, including ADM809-5LARTZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809-5LARTZ-RL7 requirements.
6.How does Aetrix verify that ADM809-5LARTZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM809-5LARTZ-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 ADM809-5LARTZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM809-5LARTZ-RL7?
All ADM809-5LARTZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809-5LARTZ-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 ADM809-5LARTZ-RL7 part is unused and in its original packaging.
Return procedure for ADM809-5LARTZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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