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Analog Devices Inc. ADM6823SYRJZ-RL7
- Part No.:
- ADM6823SYRJZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6823SYRJZ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
ADM6823SYRJZ-RL7 from Analog Devices is a precision low-voltage supervisory circuit with integrated watchdog timer and manual reset input, designed for microprocessor supply monitoring in brownout and power-up conditions. It features a 2.93 V reset threshold, 140 ms minimum reset timeout, 1.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +125°C in portable instrumentation systems.
For engineers reviewing the ADM6823SYRJZ-RL7 datasheet, ADM6823SYRJZ-RL7 pinout, ADM6823SYRJZ-RL7 application, or ADM6823SYRJZ-RL7 equivalent, key selection criteria include guaranteed reset validity down to VCC = 1 V, 7 μA typical supply current at 3.6 V, internal 50 kΩ MR pull-up, glitch-immune WDI interface, and compatibility with 5-lead SOT-23 PCB footprints.
Technical Context
The ADM6823SYRJZ-RL7 implements a fixed-threshold voltage monitor with 60 ppm/°C temperature coefficient and 2 × VTH hysteresis, ensuring stable reset assertion during VCC transients. Its on-chip watchdog detector clears on any logic transition (≥50 ns) at WDI and times out after 1.12–2.40 sec if unserviced.
Reset generation combines three independent triggers: undervoltage (VCC < 2.93 V), manual reset (MR low ≥1 μs), or watchdog timeout - all asserting the push-pull active-low RESET for ≥140 ms. The internal debounce and 100 ns MR glitch rejection enable robust push-button interfacing without external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V (±0.075 V) - precisely holds system reset until VCC stabilizes above nominal 2.93 V rail |
| Reset Timeout | 140–280 ms - guarantees minimum reset pulse width for full microprocessor initialization |
| Watchdog Timeout | 1.12–2.40 sec (typ 1.6 sec) - provides sufficient margin for firmware watchdog strobe intervals |
| Supply Current | 7 μA (at VCC = 3.6 V) - enables battery-powered operation with multi-year runtime |
| Operating Temp | −40°C to +125°C - supports automotive under-hood and industrial control environments |
| RESET Output Type | Push-pull active-low - drives logic-low directly without external pull-up; valid to VCC = 1 V |
| VCC Range | 2.7 V to 3.6 V - matches standard 3.3 V system rails with 10% tolerance margin |
Pinout & Package
ADM6823SYRJZ-RL7 is housed in a lead-free 5-lead SOT-23 package (JEDEC MO-178-AA, RJ-5 footprint), measuring 2.90 mm × 1.60 mm × 1.30 mm, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives microprocessor RESET# pin directly; sinks ≥1.2 mA at VCC ≥ 2.55 V; valid down to VCC = 1 V |
| 2 - GND | Ground reference | Common return path for internal comparators, watchdog, and reset generator; must be low-impedance |
| 3 - MR | Manual reset input (active-low) | Internal 50 kΩ pull-up ensures default high state; accepts 1 μs minimum low pulse; rejects ≤100 ns glitches |
| 4 - WDI | Watchdog input | Clears internal timer on any edge (≥50 ns); draws −20 to +160 μA depending on logic level; disabled when floating |
| 5 - VCC | Monitored supply input | Primary voltage source for internal circuitry and threshold reference; supports 2.7–3.6 V operation |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.93 V ±0.075 V with 60 ppm/°C drift - eliminates need for external trimming in 3.3 V systems |
| Guaranteed reset validity | RESET output functional down to VCC = 1 V - ensures fail-safe behavior during deep brownout |
| Integrated MR pull-up | 50 kΩ internal resistor - removes external component requirement for push-button reset circuits |
| Power supply glitch immunity | Rejects transients ≤100 ns (MR) and tolerates VCC dips per Figure 11 - prevents spurious resets in noisy environments |
| Low quiescent current | 7 μA typical at 3.6 V - extends battery life in portable medical and sensor devices |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Embedded ARM Cortex-M4 controller managing I/O modules in factory automation cabinets subject to 24 V DC supply ripple and thermal cycling. IC Role / Device Role / Timing Role: Supervises 3.3 V logic rail; asserts RESET# on brownout or firmware hang via WDI; debounced MR enables field service reset. Use Value: Prevents corrupted register states during undervoltage events; 125°C rating ensures reliability in uncooled enclosures. |
Use Scenario: Battery-powered ECG device with sleep/wake cycles and real-time waveform processing. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output; generates 140 ms reset pulse on power-up; watchdog enforces firmware liveness during 10-second measurement bursts. Use Value: 7 μA quiescent current minimizes standby drain; push-pull RESET eliminates pull-up resistor, saving board space. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: CAN-connected BCM operating from vehicle battery (9–16 V) with local 3.3 V regulator exposed to load-dump transients. IC Role / Device Role / Timing Role: Resets microcontroller if 3.3 V rail collapses below 2.93 V during cranking; MR allows diagnostic tool-initiated reset. Use Value: −40°C to +125°C rating meets AEC-Q100 Grade 2; glitch immunity prevents false resets during alternator noise. |
Use Scenario: DIN-rail mounted meter with isolated RS-485 interface and tamper detection logic. IC Role / Device Role / Timing Role: Ensures clean boot of metrology SoC after AC power interruption; WDI verifies communication stack responsiveness. Use Value: Dual-trigger reset (VCC + WDI) guarantees recovery from both power faults and software lockups without host intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326T293+T | 2.93 V reset threshold, 140 ms timeout, open-drain RESET, no WDI | Lacks watchdog functionality; requires external pull-up; suited for simpler reset-only use cases | Select when watchdog capability is unnecessary and board area permits external pull-up resistor |
| TPS3808G33DBVR | 3.3 V reset threshold, 200 ms timeout, push-pull RESET, no MR input | Higher threshold mismatches 2.93 V rail; lacks manual reset; optimized for 3.3 V systems without field service needs | Choose only if system VCC nominal is 3.3 V and manual reset is not required |
Compared with MAX6326T293+T and TPS3808G33DBVR, the ADM6823SYRJZ-RL7 uniquely delivers 2.93 V precision supervision, integrated watchdog *and* manual reset, push-pull output, and guaranteed operation down to VCC = 1 V - making it the sole option meeting all three requirements simultaneously in compact SOT-23 form.
Availability
ADM6823SYRJZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, smart energy meters, and battery-backed data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM6823SYRJZ-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 ADM682x family was engineered specifically for robust microprocessor supervision in harsh environments, combining precision voltage monitoring, watchdog safety, and manual reset in minimal 5-lead SOT-23 packages.
FAQ
What is the exact reset threshold voltage of the ADM6823SYRJZ-RL7?
The ADM6823SYRJZ-RL7 has a nominal reset threshold of 2.93 V, with a guaranteed range of 2.85 V to 3.00 V at TA = −40°C to +125°C. This value is laser-trimmed during manufacturing and specified with 60 ppm/°C temperature coefficient, ensuring stability across its full operating range. The 'S' suffix in the part number explicitly denotes the 2.93 V threshold variant.
Does the ADM6823SYRJZ-RL7 require an external pull-up resistor on the RESET pin?
No, the ADM6823SYRJZ-RL7 does not require an external pull-up resistor on the RESET pin because it features a push-pull active-low output stage. This configuration actively drives the RESET signal low during assertion and high during deassertion, eliminating dependency on external components for logic-level translation or current sourcing.
How does the manual reset (MR) input behave when left unconnected on the ADM6823SYRJZ-RL7?
When left unconnected, the MR input of the ADM6823SYRJZ-RL7 remains reliably high due to its internal 50 kΩ pull-up resistor. This ensures the device operates normally without generating unintended resets. The input also incorporates on-chip debounce and rejects transients ≤100 ns, further enhancing noise immunity in electrically noisy environments.
What is the watchdog timeout behavior of the ADM6823SYRJZ-RL7 when the WDI pin is left floating?
When the WDI pin of the ADM6823SYRJZ-RL7 is left floating, the internal window comparator disconnects the watchdog timer from the reset output circuitry. As a result, the watchdog timeout does not assert RESET, allowing the device to function solely as a voltage supervisor. This safe-default behavior prevents unintended resets during development or when watchdog functionality is unused.
Can the ADM6823SYRJZ-RL7 operate reliably at VCC = 1.2 V?
Yes, the ADM6823SYRJZ-RL7 guarantees valid RESET output operation down to VCC = 1 V, including proper logic levels and timing. At VCC = 1.2 V, the push-pull RESET output maintains VOL ≤ 0.3 V (ISINK = 100 μA) and VOH ≥ 0.8 × VCC, enabling interoperability with ultra-low-voltage microcontrollers during deep brownout recovery sequences.
ADM6823SYRJZ-RL7 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:
- 2.93V
- 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:
- SOT-23-5
ADM6823SYRJZ-RL7 FAQ
1.How can I place an order for ADM6823SYRJZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6823SYRJZ-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 ADM6823SYRJZ-RL7 reliable?
The price and inventory of ADM6823SYRJZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6823SYRJZ-RL7 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6823SYRJZ-RL7 transactions.
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ADM6823SYRJZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6823SYRJZ-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 ADM6823SYRJZ-RL7?
For technical support, including ADM6823SYRJZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6823SYRJZ-RL7 requirements.
6.How does Aetrix verify that ADM6823SYRJZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6823SYRJZ-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 ADM6823SYRJZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6823SYRJZ-RL7?
All ADM6823SYRJZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6823SYRJZ-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 ADM6823SYRJZ-RL7 part is unused and in its original packaging.
Return procedure for ADM6823SYRJZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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