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Analog Devices Inc. ADM825TYRJZ-R7
- Part No.:
- ADM825TYRJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM825TYRJZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,659
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Product details
Overview
ADM825TYRJZ-R7 from Analog Devices is a supervisory circuit with manual reset input and dual push-pull reset outputs, designed for microprocessor supply voltage monitoring and system-level fault recovery. It features a 2.93 V reset threshold (±0.05 V over temperature), 140 ms minimum reset timeout, guaranteed reset validity down to VCC = 1 V, and operates across −40°C to +125°C for automotive-grade reliability.
For engineers reviewing the ADM825TYRJZ-R7 datasheet, ADM825TYRJZ-R7 pinout, ADM825TYRJZ-R7 application, or ADM825TYRJZ-R7 equivalent, key selection criteria include manual reset support, dual active-low/active-high RESET outputs, SC70/SOT-23 package compatibility, low 5 µA quiescent current, and automotive temperature range compliance.
Technical Context
The ADM825TYRJZ-R7 implements a precision voltage monitor with internal bandgap reference and hysteresis (5 mV), enabling robust brownout detection at 2.93 V. Its dual push-pull RESET/RESET outputs drive both logic-low and logic-high signals simultaneously without external pull resistors, simplifying interface with microcontrollers requiring complementary reset inputs.
No watchdog timer is integrated-unlike ADM823/ADM824-making it suitable for systems where software execution integrity is managed externally. The MR input includes on-chip 52 kΩ pull-up and 100 ns glitch rejection, supporting reliable push-button reset initiation with minimal external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V (typ), 2.85–3.00 V (min/max over −40°C to +125°C); ensures stable reset assertion during 3.3 V rail brownout. |
| Reset Timeout | 140–280 ms (min/typ/max); guarantees sufficient processor initialization time after power stabilization. |
| Supply Current | 5 µA (typ) at VCC = 3.3 V; enables use in always-on battery-backed subsystems. |
| Operating Temperature | −40°C to +125°C; qualified for under-hood automotive and industrial control environments. |
| Reset Output Type | Dual push-pull: active-low RESET and active-high RESET; eliminates need for external pull-up/pull-down resistors. |
| MR Input Threshold | 0.3 × VCC to 0.7 × VCC; compatible with standard CMOS logic levels across full VCC range (2.7–3.6 V). |
| VCC Validity Range | Reset outputs valid down to VCC = 1 V; supports graceful shutdown sequencing in low-voltage conditions. |
Pinout & Package
ADM825TYRJZ-R7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm pitch and 2.90 mm × 1.60 mm footprint. Thermal resistance θJA is 270°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; asserted when VCC < 2.93 V, MR low, or during reset timeout. |
| 2 | GND | Ground reference for all internal comparators and output drivers. |
| 3 | RESET | Active-high push-pull reset output; complements Pin 1 for dual-signal reset architectures. |
| 4 | VCC | Monitored power supply input (2.7–3.6 V); powers internal circuitry and defines MR/RESET thresholds. |
| 5 | MR | Manual reset input (active-low); internally pulled up to VCC via 52 kΩ; ≥1 µs pulse required to trigger reset. |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull RESET outputs | Eliminates external pull resistors and supports simultaneous active-low/active-high reset signaling to diverse MCU families. |
| Automotive temperature range | −40°C to +125°C operation validated per AEC-Q100 stress test profiles for engine control and ADAS modules. |
| Internal MR pull-up | 52 kΩ on-chip resistor ensures defined high state when MR is unconnected, reducing BOM count and PCB layout complexity. |
| Low-power supervision | 5 µA typical supply current enables integration into energy-sensitive applications like telematics and sensor nodes. |
| Glitch-immune MR input | 100 ns noise rejection on MR pin prevents spurious resets from ESD or switching transients in noisy industrial environments. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 3.3 V microcontroller supply during cold cranking, where battery voltage dips below 9 V causing rail collapse. IC Role / Device Role / Timing Role: Supervisory circuit asserting dual RESET signals to ARM Cortex-M7 core and companion CAN controller upon undervoltage detection. Use Value: Prevents corrupted flash writes and register lockup by guaranteeing 140 ms reset pulse duration while operating reliably at −40°C ambient. |
Use Scenario: Ensures deterministic restart of programmable logic controller firmware after power interruption in factory automation cabinets. IC Role / Device Role / Timing Role: Manual reset initiator and power-fail detector interfacing with dual-rail FPGA configuration logic and isolated RS-485 transceivers. Use Value: Dual push-pull outputs eliminate level-shifter requirements between 3.3 V FPGA and 5 V peripheral bus, reducing component count. |
| Medical Patient Monitor | Smart Energy Meter |
|
Use Scenario: Maintains safe shutdown sequence in battery-powered portable monitors during lithium-ion cell discharge below 3.0 V. IC Role / Device Role / Timing Role: Voltage supervisor triggering controlled ADC shutdown and nonvolatile memory save before main processor reset. Use Value: Guaranteed reset validity down to VCC = 1 V allows full data preservation even during deep brownout events. |
Use Scenario: Detects AC mains failure and initiates backup supercapacitor handover in revenue-grade electricity meters. IC Role / Device Role / Timing Role: Primary reset generator coordinating real-time clock retention, metrology ASIC reset, and secure element wake-up. Use Value: 5 µA quiescent current extends supercapacitor hold-up time beyond 72 hours without compromising reset timing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM825SYRJZ-R7 | Same package, same pinout, identical functionality; differs only in reset threshold (2.93 V vs. 2.93 V - identical spec bin). | No functional difference; both rated for −40°C to +125°C and share identical electrical specs. | Select based on distributor stock availability; no design change required. |
| TPS3808G12DBVR | Single active-low open-drain RESET output; requires external pull-up; 1.2 V threshold; 200 ms timeout; 1.5 µA supply current. | Lacks dual-output capability and manual reset; suited for simpler, ultra-low-power 1.2 V–5.5 V systems without complementary reset needs. | Choose only if dual RESET outputs and MR are unnecessary and sub-2 µA current is critical. |
Compared with ADM825TYRJZ-R7, ADM825SYRJZ-R7 offers identical functionality and drop-in compatibility, while TPS3808G12DBVR trades dual outputs and manual reset for lower quiescent current and single-threshold simplicity-requiring redesign for reset interface and voltage monitoring scope.
Availability
ADM825TYRJZ-R7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical patient monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM825TYRJZ-R7 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM825 belongs to Analog Devices' supervisory circuits product line, engineered for robust power monitoring and fault recovery in automotive, industrial, and medical systems demanding AEC-Q100 qualification and extended temperature operation.
FAQ
What is the exact reset threshold voltage of ADM825TYRJZ-R7 and how does it vary with temperature?
The ADM825TYRJZ-R7 has a nominal reset threshold of 2.93 V at 25°C, with a guaranteed range of 2.85 V to 3.00 V across the full −40°C to +125°C operating temperature range. Its temperature coefficient is 40 ppm/°C, resulting in less than ±10 mV drift over the entire range-critical for stable brownout detection in automotive ECUs where rail tolerances are tight.
Does ADM825TYRJZ-R7 include a watchdog timer function?
No, ADM825TYRJZ-R7 does not include a watchdog timer. Per the Analog Devices datasheet Rev. D, the ADM825 variant is explicitly defined as having manual reset (MR) but no watchdog input (WDI)-unlike the ADM823 and ADM824. This makes ADM825TYRJZ-R7 ideal for systems where code execution integrity is handled externally or not required.
What are the voltage and current specifications for the MR input on ADM825TYRJZ-R7?
The MR input on ADM825TYRJZ-R7 is active-low with a threshold of 0.3 × VCC to 0.7 × VCC, supporting clean logic transitions across its 2.7–3.6 V operating range. It features an internal 52 kΩ pull-up resistor and accepts minimum pulse widths of 1 µs. Glitch rejection filters out transients shorter than 100 ns, ensuring immunity to ESD-induced false triggers.
Can ADM825TYRJZ-R7 operate reliably at VCC = 1 V, and what happens to the RESET outputs at that level?
Yes, ADM825TYRJZ-R7 guarantees valid RESET and RESET output states down to VCC = 1 V. At this level, the active-low RESET output remains logic-low (≤0.3 V) with 50 µA sink capability, and the active-high RESET output remains logic-high (≥0.8 × VCC) with 30 µA source capability-enabling controlled shutdown sequencing even during deep brownout conditions.
Is ADM825TYRJZ-R7 pin-compatible with other parts in the ADM823/ADM824/ADM825 family?
Yes, ADM825TYRJZ-R7 shares identical 5-lead SOT-23 (RJ-5) pinout with all ADM823/ADM824/ADM825 variants, including pin 1 (RESET), pin 2 (GND), pin 3 (RESET), pin 4 (VCC), and pin 5 (MR). This allows direct substitution within the same package footprint-though functional differences (e.g., absence of WDI) must be verified in the target application.
ADM825TYRJZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM825TYRJZ-R7 FAQ
1.How can I place an order for ADM825TYRJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM825TYRJZ-R7 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 ADM825TYRJZ-R7 reliable?
The price and inventory of ADM825TYRJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM825TYRJZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM825TYRJZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM825TYRJZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM825TYRJZ-R7?
ADM825TYRJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM825TYRJZ-R7 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 ADM825TYRJZ-R7?
For technical support, including ADM825TYRJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM825TYRJZ-R7 requirements.
6.How does Aetrix verify that ADM825TYRJZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM825TYRJZ-R7 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 ADM825TYRJZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM825TYRJZ-R7?
All ADM825TYRJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM825TYRJZ-R7, 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 ADM825TYRJZ-R7 part is unused and in its original packaging.
Return procedure for ADM825TYRJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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