My Inquiry
My Account
Analog Devices Inc. ADM1818-R22ART-RL7
- Part No.:
- ADM1818-R22ART-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM1818-R22ART-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,936
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM1818-R22ART-RL7 from Analog Devices is a microprocessor reset circuit with open-drain output and internal pull-up resistor, designed for monitoring 2.5 V supply rails. It features a 2.18 V typical reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and 3-lead SOT-23 package. It supports manual push-button reset and ensures safe system initialization in embedded controllers.
For engineers reviewing the ADM1818-R22ART-RL7 datasheet, ADM1818-R22ART-RL7 pinout, ADM1818-R22ART-RL7 application, or ADM1818-R22ART-RL7 equivalent, key selection criteria include reset threshold accuracy, push-button compatibility, open-drain drive capability, thermal performance in SOT-23, and industrial-grade temperature support.
Technical Context
The ADM1818-R22ART-RL7 implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms power-up delay timer. Its internal reference and bias circuitry enable stable trip-point performance across temperature, with ±1.5% typical threshold tolerance over −40°C to +105°C.
This device operates as a standalone supervisory IC: it continuously monitors VCC, asserts an active-low reset signal when voltage falls below 2.18 V (typ), holds reset for 150 ms after recovery, and supports external push-button assertion via the RST pin - all without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.12 V (min) to 2.25 V (max); ensures reliable detection of 2.5 V rail collapse before microprocessor malfunction |
| Reset Timeout | 100–250 ms; guarantees minimum 150 ms typical reset pulse width for full system stabilization |
| Supply Range | 1.2 V to 5.5 V; allows operation even during brown-out conditions while still monitoring 2.5 V rail |
| Quiescent Current | 4–10 µA at 3.6 V; enables ultra-low-power supervision in battery-backed systems |
| Output Type | Open-drain with 3.1–7.5 kΩ internal pull-up; simplifies interface to diverse logic families without external resistor |
| Push-Button Response | 1 µs detect time + 150 ms hold; enables robust manual reset with noise immunity and debounced timing |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood applications |
Pinout & Package
ADM1818-R22ART-RL7 is housed in a 3-lead SOT-23 (RT-3) package, measuring 2.90 mm × 1.30 mm × 1.02 mm, with gull-wing leads and JEDEC TO-236-AB compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Drives low during fault or button press; floats high otherwise; compatible with 1.8 V–5 V host logic |
| VCC | Supply input and monitored voltage rail | Both powers the IC and serves as the sensed node; no separate sense pin required |
| GND | Analog and digital ground reference | Single ground connection; requires low-impedance PCB return path for reset timing stability |
Key Features
| Feature | Design Value |
|---|---|
| Internal pull-up resistor | 5.5 kΩ typical; eliminates need for external pull-up, reducing BOM count and board space |
| Push-button reset support | Dedicated RST pin accepts direct switch-to-ground connection; enables field service reset without firmware intervention |
| Fixed 150 ms reset timeout | Guaranteed minimum delay ensures power supply stabilization before processor release - no capacitor tuning required |
| Wide supply range | Operates down to 1.2 V; remains functional during deep brown-out, enabling fail-safe reset assertion |
| High-temperature rating | Specified from −40°C to +105°C; validated for use in industrial PLCs and automotive body control modules |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 2.5 V I/O expander and CAN transceiver supply in programmable logic controller cabinets exposed to ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to ARM Cortex-M7 MCU upon undervoltage or manual maintenance reset. Use Value: Prevents erratic I/O behavior during 2.5 V rail sag; 150 ms timeout aligns with FPGA configuration time and peripheral power-up sequencing. | Use Scenario: Supervises 2.5 V sensor interface rail in door module controlling window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: Reset generator with push-button support for technician diagnostics and ECU reinitialization after battery disconnect. Use Value: Internal pull-up avoids extra resistor on space-constrained PCB; −40°C to +105°C rating covers full vehicle operating envelope. |
| Medical Point-of-Care Monitor | Smart Energy Meter |
Use Scenario: Ensures clean boot of 2.5 V ADC and display driver supply in portable diagnostic equipment powered by Li-ion battery. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor providing reset pulse synchronized to battery voltage recovery after load transient. Use Value: 4–10 µA supply current extends battery life; 2.18 V threshold matches 2.5 V LDO dropout margin under aging conditions. | Use Scenario: Monitors isolated 2.5 V auxiliary rail powering metrology ASIC and real-time clock in DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: Fault-tolerant reset source that asserts during AC mains interruption or surge-induced rail collapse. Use Value: Open-drain output interfaces directly to opto-isolated reset input; 100–250 ms timeout accommodates backup capacitor hold-up time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 2.16 V reset threshold (±2.5%), 140 ms min timeout, SOT-23-3, no push-button support | Lacks manual reset functionality; requires external pull-up for open-drain output | Select when push-button reset is unnecessary and tighter threshold tolerance is not required |
| TPS3808G12DBVR | 1.22 V threshold, adjustable timeout via capacitor, 1.5 µA quiescent current, SOT-23-6 | Requires external timing capacitor and pull-up; larger footprint; lower supply current but higher design complexity | Select when programmable delay or sub-2 µA standby is critical, and board area permits 6-pin package |
Compared with MAX809TRD2T and TPS3808G12DBVR, the ADM1818-R22ART-RL7 uniquely integrates push-button reset, internal pull-up, and industrial temperature range in a 3-pin SOT-23 - reducing component count and qualification effort for 2.5 V rail supervision.
Availability
ADM1818-R22ART-RL7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical point-of-care monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM1818-R22ART-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 ADM181x series was engineered specifically for cost-sensitive, space-constrained microprocessor supervision tasks - delivering precision reset thresholds, guaranteed timing, and push-button capability in minimal 3-lead packages.
FAQ
What is the exact reset threshold voltage of ADM1818-R22ART-RL7?
The ADM1818-R22ART-RL7 has a guaranteed reset threshold range of 2.12 V (minimum) to 2.25 V (maximum), with 2.18 V typical at 25°C. This value is specified across the full −40°C to +105°C operating temperature range and applies to the R22 variant per the Analog Devices ADM181x datasheet Rev. F, Table 1.
Does ADM1818-R22ART-RL7 support manual reset via push-button?
Yes, ADM1818-R22ART-RL7 supports manual reset: connecting a push-button between the RST pin and GND pulls the output low, and upon release, the device holds reset active for 150 ms typical. This function is explicitly documented for ADM1818 in the "ADM1813 AND ADM1818" section of the datasheet.
What package type and dimensions does ADM1818-R22ART-RL7 use?
ADM1818-R22ART-RL7 uses the 3-lead SOT-23 (RT-3) package, with body dimensions of 2.90 mm × 1.30 mm × 1.02 mm and JEDEC TO-236-AB compliance. Pin pitch is 0.95 mm, and lead thickness is 0.10 mm - confirmed in Figure 15 and Ordering Guide of the ADM181x datasheet.
Is an external pull-up resistor required for ADM1818-R22ART-RL7?
No, ADM1818-R22ART-RL7 includes an internal pull-up resistor ranging from 3.1 kΩ (min) to 7.5 kΩ (max), with 5.5 kΩ typical. This eliminates the need for an external component, as stated in Table 1 under "INTERNAL PULL-UP RESISTOR" for ADM1813/ADM1818.
What is the operating temperature range for ADM1818-R22ART-RL7?
The ADM1818-R22ART-RL7 is rated for −40°C to +105°C, matching the industrial temperature grade defined in the Ordering Guide and Absolute Maximum Ratings table. This range is validated and guaranteed for continuous operation per Analog Devices specification.
ADM1818-R22ART-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.18V
- 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:
- SOT-23-3
ADM1818-R22ART-RL7 FAQ
1.How can I place an order for ADM1818-R22ART-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-R22ART-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 ADM1818-R22ART-RL7 reliable?
The price and inventory of ADM1818-R22ART-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1818-R22ART-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1818-R22ART-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-R22ART-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-R22ART-RL7?
ADM1818-R22ART-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-R22ART-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 ADM1818-R22ART-RL7?
For technical support, including ADM1818-R22ART-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-R22ART-RL7 requirements.
6.How does Aetrix verify that ADM1818-R22ART-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1818-R22ART-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 ADM1818-R22ART-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1818-R22ART-RL7?
All ADM1818-R22ART-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-R22ART-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 ADM1818-R22ART-RL7 part is unused and in its original packaging.
Return procedure for ADM1818-R22ART-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1818-R22ART-RL7 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…
