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Analog Devices Inc. ADM809LAKSZ-REEL
- Part No.:
- ADM809LAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809LAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,574
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Product details
Overview
ADM809LAKSZ-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.63 V reset threshold, and operation down to 1.0 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 environments. It monitors 5 V supply rails in embedded controllers and intelligent instrumentation.
For engineers reviewing the ADM809LAKSZ-REEL datasheet, ADM809LAKSZ-REEL pinout, ADM809LAKSZ-REEL application, or ADM809LAKSZ-REEL 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), SC70-3 package footprint, and compatibility with 3 V/5 V logic interfaces.
Technical Context
The ADM809LAKSZ-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stable threshold performance across −40°C to +125°C, with 30 ppm/°C temperature coefficient.
It features a push-pull RESET output capable of sinking 3.2 mA at minimum threshold voltage and sourcing current up to 800 μA, enabling direct interface to CMOS/TTL inputs without external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (±1.5% over −40°C to +125°C); precisely monitors 5 V supply rails during brownout. |
| Reset Timeout | 240 ms typical power-on delay; holds microprocessor in reset until supply stabilizes. |
| Supply Current | 17 μA typical at VCC < 3.6 V; enables battery-backed or ultra-low-power system monitoring. |
| VCC Operating Range | 1.0 V to 5.5 V; ensures valid reset assertion even during deep undervoltage conditions. |
| RESET Output Type | Push-pull active-low; eliminates need for external pull-up resistor and supports 3.3 V/5 V logic levels. |
| Output Drive Strength | Sinks 3.2 mA at VTH min; directly drives standard CMOS inputs without level-shifting. |
| Package | 3-lead SC70 (KS-3); 1.25 mm × 2.00 mm footprint for space-constrained PCB layouts. |
Pinout & Package
ADM809LAKSZ-REEL uses a 3-lead SC70 (KS-3) package with exposed pad not electrically connected. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC - consistent across all ADM809 variants per datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for internal comparator and output stage; must connect to system ground plane. |
| RESET (Pin 2) | Active-low push-pull output | Drives low during reset condition (VCC < 4.63 V) and high otherwise; no external pull-up required. |
| VCC (Pin 3) | Monitored supply input | Connects directly to 5 V rail being supervised; powers internal circuitry and defines reset threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.63 V ±1.5% over full −40°C to +125°C range ensures reliable 5 V supply monitoring under thermal stress. |
| Ultra-low quiescent current | 17 μA typical enables integration into always-on subsystems without impacting battery life. |
| Wide VCC operating range | Functions down to 1.0 V VCC, guaranteeing reset assertion during catastrophic brownout events. |
| Glitch-immune comparator | Built-in filtering rejects fast transients ≤100 μs on VCC, preventing false resets from supply noise. |
| SC70-3 footprint | 1.25 mm × 2.00 mm body size allows placement in dense MCU-based control modules with minimal board area. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5 V microcontroller supply in programmable logic controllers subject to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to hold ARM Cortex-M4 core in known state during power ramp-up and brownout. Use Value: 240 ms guaranteed timeout and 30 ppm/°C drift ensure deterministic boot sequencing across −40°C to +125°C operating range. |
Use Scenario: Secures boot integrity of infotainment MCU in vehicle door modules where 5 V rail may dip during load dump or cold-crank conditions. IC Role / Device Role / Timing Role: Voltage monitor generating clean reset pulse independent of main SoC's internal POR, preventing firmware corruption. Use Value: 1.0 V VCC operation and 4.63 V threshold tolerance (±1.5%) maintain reset validity during 5 V rail sag to 4.2 V. |
| Medical Diagnostic Handheld | Smart Energy Meter |
|
Use Scenario: Ensures reliable startup of battery-powered portable ultrasound processor after Li-ion recharge cycles cause variable 5 V LDO output. IC Role / Device Role / Timing Role: Standalone reset generator interfacing directly to processor's nRST pin via push-pull output. Use Value: 17 μA supply current extends battery runtime; SC70-3 package fits within 12 mm × 12 mm PCB constraint. |
Use Scenario: Guards against meter firmware crash during AC line sags that reduce 5 V auxiliary supply in smart electricity meters. IC Role / Device Role / Timing Role: Dedicated supervisor IC decoupled from meter SoC's internal reset logic for higher reliability. Use Value: Glitch-immune comparator prevents spurious resets from 50/60 Hz ripple and switching noise on 5 V rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63 V threshold, SOT-23-3 package, 20 μA supply current, −40°C to +85°C rating | Limited to commercial temperature range; lacks extended 125°C qualification | Select when cost sensitivity outweighs automotive/industrial temperature requirements |
| TPS3808G125DBVR | 4.63 V threshold, SOT-23-6 package, 1.1 μA quiescent current, adjustable reset delay | Requires external capacitor for timing; larger footprint and different pinout | Choose for ultra-low-power designs where 240 ms fixed delay is acceptable and board space permits SOT-23-6 |
Compared with MAX809SEUR+T, ADM809LAKSZ-REEL offers extended temperature support critical for under-hood or industrial deployments; versus TPS3808G125DBVR, it delivers fixed-timing simplicity and smaller SC70-3 footprint at slightly higher quiescent current.
Availability
ADM809LAKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, and smart energy meters requiring stable component supply across extended temperature ranges.
Supply support for ADM809LAKSZ-REEL 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 ADM809LAKSZ-REEL belongs to Analog Devices' microprocessor supervisory IC family, engineered specifically for robust power-on reset generation in harsh-environment embedded systems where supply voltage stability cannot be assumed.
FAQ
What is the reset threshold voltage of the ADM809LAKSZ-REEL?
The ADM809LAKSZ-REEL has a nominal reset threshold voltage of 4.63 V, specified with ±1.5% tolerance over the full −40°C to +125°C temperature range. This value is confirmed in Table 3 and Table 1 of the ADM803/ADM809/ADM810 datasheet Rev. I, making it suitable for precise monitoring of 5 V supply rails in demanding applications.
Does the ADM809LAKSZ-REEL require an external pull-up resistor on the RESET pin?
No, the ADM809LAKSZ-REEL features a push-pull RESET output, eliminating the need for an external pull-up resistor. As stated in the General Description and Pin Configurations section, only the ADM803 variant requires one; ADM809 and ADM810 provide active drive in both high and low states, simplifying interface design.
What package type does the ADM809LAKSZ-REEL use?
The ADM809LAKSZ-REEL uses a 3-lead SC70 package (JEDEC KS-3), measuring 1.25 mm × 2.00 mm with 0.65 mm lead pitch. This is explicitly documented in the Ordering Guide and Outline Dimensions sections of the datasheet, distinguishing it from SOT-23 variants like ADM809LARTZ-REEL7.
What is the minimum VCC voltage at which ADM809LAKSZ-REEL guarantees RESET assertion?
The ADM809LAKSZ-REEL guarantees RESET assertion down to 1.0 V VCC, as specified in the "VCC OPERATING VOLTAGE RANGE" row of Table 1. This ensures fail-safe reset behavior during severe brownout conditions where the monitored supply collapses below typical logic thresholds.
How long is the power-on reset timeout period for ADM809LAKSZ-REEL?
The ADM809LAKSZ-REEL provides a minimum power-on reset timeout of 140 ms and a typical timeout of 240 ms, with maximum of 460 ms over −40°C to +85°C (Table 1). The 240 ms typical value is used for design margining in most applications, ensuring sufficient time for power supply stabilization before processor release.
ADM809LAKSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM809LAKSZ-REEL FAQ
1.How can I place an order for ADM809LAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809LAKSZ-REEL 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 ADM809LAKSZ-REEL reliable?
The price and inventory of ADM809LAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809LAKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM809LAKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809LAKSZ-REEL transactions.
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4.How is shipping managed for ADM809LAKSZ-REEL?
ADM809LAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809LAKSZ-REEL 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 ADM809LAKSZ-REEL?
For technical support, including ADM809LAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809LAKSZ-REEL requirements.
6.How does Aetrix verify that ADM809LAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809LAKSZ-REEL 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 ADM809LAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM809LAKSZ-REEL?
All ADM809LAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809LAKSZ-REEL, 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 ADM809LAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM809LAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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