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Analog Devices Inc. ADM823YYKSZ-R7
- Part No.:
- ADM823YYKSZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADM823YYKSZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ADM823YYKSZ-R7 from Analog Devices is a precision supervisory circuit with watchdog timer and manual reset, designed for microprocessor supply voltage monitoring in automotive-grade systems. It features a 2.19 V reset threshold (±30 mV), 140 ms minimum reset timeout, 1.6 sec watchdog timeout, push-pull active-low RESET output, and operates over −40°C to +125°C.
For engineers reviewing the ADM823YYKSZ-R7 datasheet, ADM823YYKSZ-R7 pinout, ADM823YYKSZ-R7 application, or ADM823YYKSZ-R7 equivalent, this device serves as a low-power (5 µA typical), SC70-packaged solution for brownout detection, code execution integrity monitoring, and user-initiated system reset in space-constrained embedded controllers.
Technical Context
The ADM823YYKSZ-R7 integrates a precision voltage comparator with 40 ppm/°C temperature coefficient, a monostable watchdog timer cleared by WDI transitions, and an internal 52 kΩ MR pull-up. Its reset generator asserts active-low RESET whenever VCC falls below 2.19 V, MR is pulled low ≥1 µs, or WDI remains static beyond 1.6 sec.
It uses a fixed-reset-time architecture with guaranteed RESET validity down to VCC = 1 V, power supply glitch immunity via integrated debounce, and operates across full automotive temperature range without external components. The SC70-5 package enables high-density PCB layouts while maintaining thermal performance (θJA = 146°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19 V ±30 mV at 25°C; ensures reliable brownout detection for 2.5 V–3.3 V logic rails |
| Reset Timeout | 140 ms minimum; guarantees sufficient hold time for microprocessor initialization after power recovery |
| Watchdog Timeout | 1.6 sec typical; provides robust code-execution monitoring without excessive false triggers |
| Supply Current | 5 µA typical at VCC = 2.7 V; enables battery-backed operation in portable and automotive modules |
| Operating Temp | −40°C to +125°C; qualified for under-hood and industrial control environments |
| Output Type | Active-low push-pull RESET; eliminates need for external pull-up resistor and supports direct MCU reset input |
| MR Input | Active-low with 52 kΩ internal pull-up; allows momentary push-button reset without external biasing |
Pinout & Package
ADM823YYKSZ-R7 is housed in a 5-lead SC70 (KS-5) package, measuring 2.00 mm × 1.25 mm × 0.90 mm, with JEDEC MO-203-AA compliance and wettable flank capability for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives MCU reset pin directly; sinks 3.2 mA at VTH min; valid down to VCC = 1 V |
| 2 - GND | Ground reference | Common return path for all internal circuits; requires low-impedance PCB connection |
| 3 - MR | Manual reset input | Active-low; internally pulled up to VCC via 52 kΩ; accepts ≥1 µs pulses for reliable debounced reset |
| 4 - WDI | Watchdog input | Edge-sensitive; clears watchdog timer on any logic transition; rejects <100 ns noise |
| 5 - VCC | Supply voltage input | Monitored rail; supports 2.25 V–2.75 V operation; glitch-immune comparator input |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.19 V with ±30 mV tolerance over −40°C to +125°C ensures stable trip point across automotive thermal cycles |
| Integrated MR pull-up | 52 kΩ internal resistor eliminates external component count and simplifies push-button interface design |
| Glitch-immune VCC sensing | Detects only sustained undervoltage events >100 ns, preventing spurious resets from EMI or switching noise |
| Low-voltage reset validity | RESET output remains functional down to VCC = 1 V, enabling safe shutdown sequencing in deep brownout conditions |
| Watchdog edge-triggered clear | Accepts 50 ns minimum WDI pulses, allowing minimal firmware overhead for watchdog strobing |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 2.5 V microcontroller supply during cold cranking when battery voltage dips to 6–9 V. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET until VCC stabilizes above 2.19 V and confirming software liveness via WDI strobes. Use Value: Prevents erratic MCU behavior during start-up transients and recovers from firmware lockups without requiring service intervention. |
Use Scenario: Ensuring deterministic boot sequence for ARM-based controller in distributed I/O rack exposed to 85°C ambient. IC Role / Device Role / Timing Role: Providing temperature-stable reset assertion and manual reset capability for field maintenance access. Use Value: Guarantees reliable power-on initialization and enables operator-triggered recovery from communication faults without power cycling. |
| Medical Infusion Pump Controller | Smart Energy Meter MCU Subsystem |
Use Scenario: Maintaining fail-safe operation of safety-critical dosing algorithm running on low-power MCU powered from 3.3 V LDO. IC Role / Device Role / Timing Role: Dual-function supervisor detecting both supply collapse and software hang via WDI timeout. Use Value: Meets IEC 62304 Class C requirements by ensuring automatic restart upon detected fault, with MR enabling clinical staff-initiated reset. |
Use Scenario: Securing meter firmware execution during grid voltage sags that cause 2.7 V rail instability in AMI endpoint. IC Role / Device Role / Timing Role: Reset generator with 140 ms timeout aligned to meter's firmware boot window and WDI-driven watchdog coverage. Use Value: Eliminates corrupted flash writes and communication loss during brownouts, preserving billing accuracy and regulatory compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT23D3+T | 2.33 V reset threshold; no manual reset input; SOT-23-5 package | Lacks MR functionality; suitable only where external reset button is unnecessary | Select when board layout already accommodates SOT-23 and MR is not required. |
| TPS3808G125DBVR | 1.25 V reset threshold; adjustable watchdog (1.6–12.8 sec); SOT-23-6 package | Lower threshold and wider watchdog range; requires extra pin for SET input | Choose when system uses sub-2 V rails or needs programmable watchdog timing. |
Compared with ADM823YYKSZ-R7, MAX6326UT23D3+T omits manual reset but offers identical SC70-compatible footprint and watchdog function, while TPS3808G125DBVR provides greater timing flexibility at the cost of higher pin count and different threshold targeting.
Availability
ADM823YYKSZ-R7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and smart energy meter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM823YYKSZ-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 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 ADM823 family was engineered specifically for automotive and industrial microprocessor supervision, delivering precision voltage monitoring, watchdog reliability, and manual reset integration in ultra-small packages.
FAQ
What is the exact reset threshold voltage of the ADM823YYKSZ-R7?
The ADM823YYKSZ-R7 has a nominal reset threshold of 2.19 V at 25°C, with a guaranteed range of 2.13 V to 2.25 V across the full −40°C to +125°C operating temperature range. This value is factory-trimmed and specified in Table 2 of the Rev. D datasheet under the ADM82xY designation.
Does the ADM823YYKSZ-R7 support manual reset functionality?
Yes, the ADM823YYKSZ-R7 includes a dedicated MR (manual reset) input on Pin 3. It is active-low, features an internal 52 kΩ pull-up resistor, and requires a minimum pulse width of 1 µs to assert RESET. This allows direct connection to a push-button switch without external components.
What is the watchdog timeout period for the ADM823YYKSZ-R7?
The ADM823YYKSZ-R7 has a typical watchdog timeout period of 1.6 seconds, with a guaranteed range of 1.12 to 2.40 seconds across temperature and supply voltage. The timer is cleared on every logic transition (rising or falling edge) at the WDI pin, making it edge-sensitive rather than level-sensitive.
Which package type does the ADM823YYKSZ-R7 use?
The ADM823YYKSZ-R7 uses the 5-lead SC70 package (JEDEC MO-203-AA, Analog Devices KS-5), with dimensions of 2.00 mm × 1.25 mm × 0.90 mm. This ultra-compact package supports high-density PCB layouts and is RoHS-compliant (indicated by the "Z" suffix).
Can the ADM823YYKSZ-R7 operate reliably at VCC = 1 V?
Yes, the ADM823YYKSZ-R7 guarantees valid RESET output down to VCC = 1 V, as confirmed in the "RESET Output Voltage" specification table (Page 3). At this voltage, RESET remains logic-low with 50 µA sink current, enabling controlled shutdown sequencing in deep brownout scenarios.
ADM823YYKSZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.19V
- Output:
- Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ADM823YYKSZ-R7 FAQ
1.How can I place an order for ADM823YYKSZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM823YYKSZ-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 ADM823YYKSZ-R7 reliable?
The price and inventory of ADM823YYKSZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM823YYKSZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM823YYKSZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM823YYKSZ-R7 transactions.
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4.How is shipping managed for ADM823YYKSZ-R7?
ADM823YYKSZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM823YYKSZ-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 ADM823YYKSZ-R7?
For technical support, including ADM823YYKSZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM823YYKSZ-R7 requirements.
6.How does Aetrix verify that ADM823YYKSZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM823YYKSZ-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 ADM823YYKSZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM823YYKSZ-R7?
All ADM823YYKSZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM823YYKSZ-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 ADM823YYKSZ-R7 part is unused and in its original packaging.
Return procedure for ADM823YYKSZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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