My Inquiry
My Account
Analog Devices Inc. ADM1818-20AKS-REEL
- Part No.:
- ADM1818-20AKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1818-20AKS-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM1818-20AKS-REEL from Analog Devices is a microprocessor reset circuit with open-drain output and internal pull-up resistor, designed to monitor 3 V supply rails. It features a 2.55 V (typical) reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and SC70-3 package. It supports manual push-button reset for system initialization in embedded controllers.
For engineers reviewing the ADM1818-20AKS-REEL datasheet, ADM1818-20AKS-REEL pinout, ADM1818-20AKS-REEL application, or ADM1818-20AKS-REEL equivalent, key selection criteria include trip point accuracy (±1.5% typical), low quiescent current (≤10 µA at 3.6 V), push-button reset timing (1 µs detect, 150 ms assertion), and compatibility with 3 V logic-level microprocessor reset inputs.
Technical Context
The ADM1818-20AKS-REEL implements a precision voltage comparator with hysteresis and an internal 150 ms power-on reset timer. Its reset assertion is triggered when VCC falls below 2.55 V (typical), with guaranteed operation down to 1.2 V supply and ±1.5% threshold tolerance over temperature.
This device uses an open-drain RST output with integrated 3.1–7.5 kΩ pull-up resistor, enabling direct connection to microprocessor reset pins requiring active-low assertion. Push-button functionality allows external reset initiation via momentary ground connection to RST, with automatic 150 ms hold time after release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55 V typical (2.47–2.64 V min/max); monitors 3 V supplies with margin |
| Reset Timeout | 150 ms typical (100–250 ms min/max); ensures stable power-up before release |
| Supply Range | 1.2 V to 5.5 V; operates during brown-out and full rail conditions |
| Quiescent Current | ≤10 µA at 3.6 V; enables ultra-low-power battery-backed systems |
| Output Type | Open-drain with internal 3.1–7.5 kΩ pull-up; eliminates need for external resistor |
| Push-Button Response | Detects ≥1 µs button press; asserts reset for 150 ms after release |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood environments |
Pinout & Package
ADM1818-20AKS-REEL is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, with gull-wing leads and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Monitored supply input; powers internal circuitry and defines reset threshold reference |
| 2 | GND | 0 V reference for comparator, timer, and output stage; must be low-impedance |
| 3 | RST | Active-low open-drain reset output; sinks up to 8 mA; pulled high internally |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pull-up resistor | 3.1–7.5 kΩ internal; eliminates external component and PCB space for reset net |
| Push-button reset support | Hardware-based debounced reset initiation; no firmware or external logic required |
| Precision threshold tolerance | ±1.5% typical over −40°C to +105°C; reduces need for margin in 3 V system design |
| Low-voltage operation | Functional down to 1.2 V VCC; supports brown-out detection in deep-sleep states |
| SC70-3 footprint | 0.65 mm lead pitch, 1.25 mm width; compatible with high-density automated assembly |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power cycling during CAN bus wake-up or firmware update in programmable logic controllers. IC Role / Device Role / Timing Role: Monitors 3.3 V auxiliary rail and asserts active-low reset to ARM Cortex-M7 MCU until voltage stabilizes. Use Value: Prevents spurious execution during 150 ms post-power-up stabilization window; eliminates external RC network. | Use Scenario: Cold-cranking event where battery dips to 6–9 V, causing 3 V LDO output to sag transiently. IC Role / Device Role / Timing Role: Detects 3 V rail drop below 2.55 V and holds microcontroller in reset for 150 ms after recovery. Use Value: Guarantees deterministic restart after voltage dip; meets ISO 16750-2 pulse 4 requirements. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Battery backup switchover during AC mains failure, where 3 V rail may experience brief dropout. IC Role / Device Role / Timing Role: Provides clean reset signal to safety-critical MCU upon 3 V rail undervoltage detection. Use Value: Meets IEC 62304 Class C software safety requirement for controlled restart on power anomaly. | Use Scenario: Firmware upgrade initiated via HPLC communication, requiring safe reset sequence before flash reprogramming. IC Role / Device Role / Timing Role: Accepts push-button reset input from meter's test port to force controlled reboot without power cycle. Use Value: Enables field-serviceable firmware recovery using single physical button; no soldering or tool access needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 2.5 V fixed threshold, SOT-23-3, no push-button support, 140 ms reset timeout | Lacks manual reset; requires external pull-up for open-drain output | Select when push-button functionality is unnecessary and board space permits external resistor |
| TPS3808G125DBVR | 2.55 V threshold, SOT-23-6, adjustable delay, higher quiescent current (12 µA) | Requires external capacitor for timing; larger footprint; no integrated pull-up | Choose when programmable reset timeout is required and layout accommodates 6-pin package |
Compared with MAX809SEUR+T and TPS3808G125DBVR, the ADM1818-20AKS-REEL uniquely integrates push-button reset and internal pull-up in SC70-3, reducing BOM count and enabling compact, self-contained reset control for 3 V systems.
Availability
ADM1818-20AKS-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM1818-20AKS-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.
The ADM181x series was designed specifically for reliable, low-cost microprocessor supervision in space-constrained embedded systems requiring precise undervoltage detection and robust reset timing.
FAQ
What is the exact reset threshold voltage of the ADM1818-20AKS-REEL?
The ADM1818-20AKS-REEL has a nominal reset threshold of 2.55 V (typical), with guaranteed minimum and maximum values of 2.47 V and 2.64 V respectively, specified over −40°C to +105°C. This threshold is factory-trimmed and does not require external calibration. The ADM1818-20AKS-REEL is optimized for monitoring 3 V supply rails with sufficient headroom for ripple and tolerance.
Does the ADM1818-20AKS-REEL require an external pull-up resistor on the RST pin?
No, the ADM1818-20AKS-REEL includes an internal pull-up resistor ranging from 3.1 kΩ to 7.5 kΩ, eliminating the need for an external component. This simplifies schematic design and PCB layout while ensuring consistent rise time and noise immunity. The ADM1818-20AKS-REEL's integrated pull-up is confirmed in Table 1 of the Rev. F datasheet under "INTERNAL PULL-UP RESISTOR".
Can the ADM1818-20AKS-REEL be used with a manual push-button reset?
Yes, the ADM1818-20AKS-REEL explicitly supports manual push-button reset per the datasheet's "ADM1813 AND ADM1818" section. Connecting a momentary switch between RST and GND pulls the output low; releasing it triggers a guaranteed 150 ms (typical) reset assertion. The ADM1818-20AKS-REEL detects button presses ≥1 µs, making it compatible with standard tactile switches without debounce circuitry.
What package type and dimensions does the ADM1818-20AKS-REEL use?
The ADM1818-20AKS-REEL uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.95 mm body size, 0.65 mm lead pitch, gull-wing leads. Dimensions comply with EIAJ SC70 standards and are documented in Figure 16 (Page 8) of the Rev. F datasheet. This package enables high-density placement and reflow-compatible assembly.
What is the supply current consumption of the ADM1818-20AKS-REEL at 3.6 V?
At VCC = 3.6 V and TA = −40°C to +105°C, the ADM1818-20AKS-REEL draws ≤10 µA (typical 4 µA) when VCC exceeds the reset threshold and no load is applied. This ultra-low quiescent current is specified in Table 1 under "Current" and supports battery-powered or energy-harvesting applications where standby power is critical. The ADM1818-20AKS-REEL maintains this performance across its full temperature range.
ADM1818-20AKS-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:
- 2.55V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM1818-20AKS-REEL FAQ
1.How can I place an order for ADM1818-20AKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-20AKS-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 ADM1818-20AKS-REEL reliable?
The price and inventory of ADM1818-20AKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1818-20AKS-REEL is usually 5 days.
3.What payment methods are accepted for ADM1818-20AKS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-20AKS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-20AKS-REEL?
ADM1818-20AKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-20AKS-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 ADM1818-20AKS-REEL?
For technical support, including ADM1818-20AKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-20AKS-REEL requirements.
6.How does Aetrix verify that ADM1818-20AKS-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1818-20AKS-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 ADM1818-20AKS-REEL meets industry standards.
7.What is the process for return or replacement of ADM1818-20AKS-REEL?
All ADM1818-20AKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-20AKS-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 ADM1818-20AKS-REEL part is unused and in its original packaging.
Return procedure for ADM1818-20AKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1818-20AKS-REEL 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…
