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Analog Devices Inc./Maxim Integrated DS1830AS/T&R
- Part No.:
- DS1830AS/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1830AS/T&R.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,725
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Product details
Overview
DS1830AS/T&R from Maxim Integrated is a 3.3V triple-output reset sequencer IC that monitors VCC for out-of-tolerance conditions and generates time-sequenced active-low reset signals (RST1, RST2, RST3) with programmable delays (10–500 ms), precision voltage trip points (2.47–3.15 V), and pushbutton override capability. It operates from -40°C to +85°C in 8-pin SO package and is used in multi-rail embedded systems requiring controlled power-up sequencing.
For engineers reviewing the DS1830AS/T&R datasheet, DS1830AS/T&R pinout, DS1830AS/T&R application, or DS1830AS/T&R equivalent, key selection factors include its 3.3V supply compatibility, TOL-selectable VCC trip tolerance (5%/10%/20%), TD-configurable reset timing hierarchy, open-drain outputs, and integrated pushbutton debouncing with 40kΩ internal pull-up.
Technical Context
The DS1830AS/T&R implements a precision temperature-compensated bandgap reference and comparator to detect VCC deviations against user-selected trip thresholds via the TOL input. Its internal oscillator drives a clock chain that enforces fixed 1×/5×/10× timing ratios between RST1, RST2, and RST3 release delays based on TD state (GND/N.C./VCC).
Reset assertion occurs synchronously on VCC undervoltage or PBRST low pulse ≥1 ms; all outputs remain active until VCC stabilizes and programmed delays expire. The device samples TOL only during power-up before VCC exceeds the lowest trip point, locking configuration for the power cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 1.0 V to 5.5 V - supports wide-input operation but configured for 3.3 V nominal systems |
| VCC Trip Point (TOL=Open) | 2.47 V to 2.64 V - enables reliable detection of 3.3 V rail collapse below 2.5 V |
| RST1 Delay (TD=GND) | 10 ms min - shortest sequence delay for fast-recovery subsystems |
| RST3 Delay (TD=VCC) | 500 ms max - longest delay ensures late-release peripherals stabilize fully |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded environments |
| Standby Current | 10 µA typ - ultra-low quiescent draw preserves system power budget |
| Input Leakage | ±1.0 µA - minimizes loading on external bias networks and RC timing elements |
Pinout & Package
DS1830AS/T&R is housed in an 8-pin SO (Small Outline) package, 150-mil width, RoHS-compliant, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PBRST | Pushbutton Reset Input | Active-low manual reset trigger; internally pulled up to VCC with 40 kΩ; requires ≥1 ms low pulse |
| 2 TD | Time Delay Select Input | Configures RST1/RST2/RST3 timing ratio (GND/N.C./VCC → 10/20/50 ms base delay) |
| 3 TOL | VCC Tolerance Select Input | Sets trip threshold hysteresis (5%/10%/20%); sampled only during power-up before VCC rise |
| 4 GND | Ground Reference | Primary return path for internal reference, comparator, and output drivers |
| 5 RST3 | Reset Output 3 | Active-low open-drain output; releases last in sequence (10× RST1 delay) |
| 6 RST2 | Reset Output 2 | Active-low open-drain output; releases second (5× RST1 delay) |
| 7 RST1 | Reset Output 1 | Active-low open-drain output; releases first (base delay per TD setting) |
| 8 VCC | Power Supply Input | 3.3 V nominal supply; powers internal reference, logic, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Triple sequenced reset outputs | Enables staggered power-up of processors, FPGAs, and peripherals without external timing components |
| TOL-selectable VCC trip tolerance | Allows precise matching to 3.3 V system rail tolerances (5%, 10%, or 20%) without redesign |
| TD-programmable timing hierarchy | Provides three discrete delay families (10/50/100 ms, 20/100/200 ms, or 50/250/500 ms) via single pin |
| Integrated pushbutton debouncing | Eliminates need for external RC filters or microcontroller GPIO polling for manual reset |
| Temperature-compensated reference | Maintains ±1.5% trip accuracy over full -40°C to +85°C range without calibration |
Applications
| Industrial PLC Controller | FPGA-Based Data Acquisition System |
|---|---|
Use Scenario: Multi-voltage FPGA board with 3.3 V I/O, 1.2 V core, and 2.5 V auxiliary rails requiring strict power-up order. IC Role / Device Role / Timing Role: DS1830AS/T&R acts as primary reset sequencer, asserting RST1 to FPGA configuration logic, RST2 to ADC interface, and RST3 to Ethernet PHY after calibrated delays. Use Value: Prevents metastability and latch-up by enforcing 10–500 ms release spacing aligned to rail stabilization times. | Use Scenario: Field-deployed sensor node with battery-backed real-time clock and flash memory needing deterministic recovery after brownout. IC Role / Device Role / Timing Role: DS1830AS/T&R monitors main 3.3 V supply and triggers cascaded resets: RST1 holds MCU in reset, RST2 delays RTC initialization, RST3 gates flash write enable. Use Value: Guarantees flash integrity by ensuring RTC registers are stable before enabling write cycles. |
| Medical Imaging Front-End | Automotive ADAS Camera Module |
Use Scenario: High-resolution analog front-end with correlated double sampling, requiring synchronized reset of analog signal chain and digital controller. IC Role / Device Role / Timing Role: DS1830AS/T&R provides RST1 to analog ASIC, RST2 to image processor, and RST3 to LVDS serializer with 20 ms spacing to absorb analog settling time. Use Value: Eliminates frame corruption at power-on by aligning digital logic release with analog signal stability. | Use Scenario: Compact camera module with 3.3 V image sensor, ISP, and CAN transceiver sharing single DC-DC converter. IC Role / Device Role / Timing Role: DS1830AS/T&R sequences RST1 to sensor, RST2 to ISP, and RST3 to CAN PHY using TD=N.C. for 20/100/200 ms delays. Use Value: Ensures CAN bus enters operational state only after ISP firmware loads and sensor registers lock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset sequencer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816ESE+ | Single active-low reset output; no sequencing; 3.0 V to 3.6 V trip; no TOL/TD inputs | Suitable only for basic reset assertion-lacks multi-output timing control required for complex power-up | Select when only one reset signal is needed and sequencing is handled elsewhere |
| TPS3808G33DBVR | Single-channel 3.3 V supervisor with 200 ms fixed delay; no pushbutton input; no tolerance select | Provides watchdog and reset but cannot generate three staggered outputs or support manual override | Choose for cost-sensitive designs where only primary processor reset is required |
Compared with MAX6816ESE+ and TPS3808G33DBVR, DS1830AS/T&R uniquely delivers three independently timed, open-drain reset outputs with field-programmable trip tolerance and pushbutton override-all in a single 8-pin SO package-making it irreplaceable for multi-rail sequencing where timing coordination is critical.
Availability
DS1830AS/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, FPGA-based data acquisition systems, medical imaging front-ends, and automotive ADAS camera modules requiring stable component supply across extended production lifecycles.
Supply support for DS1830AS/T&R 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The DS1830AS/T&R belongs to Maxim's supervisory and reset sequencer product line, engineered specifically for reliable power-up coordination in multi-voltage embedded systems where deterministic reset timing prevents functional failure.
FAQ
What is the function of the TOL pin on the DS1830AS/T&R?
The TOL pin on the DS1830AS/T&R selects the VCC trip point tolerance: 5% (TOL = VCC), 10% (TOL = GND), or 20% (TOL = open). It is sampled only during initial power-up before VCC rises above the lowest trip threshold, locking the selected tolerance for that power cycle. This allows DS1830AS/T&R to adapt precisely to different 3.3 V rail stability requirements without hardware changes.
How does the TD pin affect reset timing in DS1830AS/T&R?
The TD pin configures the base delay for RST1: 10 ms (TD = GND), 20 ms (TD = open), or 50 ms (TD = VCC). RST2 and RST3 then follow at exact 5× and 10× multiples respectively. This fixed ratio ensures deterministic sequencing across temperature and supply variations. DS1830AS/T&R uses an internal oscillator to maintain timing accuracy independent of external components.
Can DS1830AS/T&R be used in 5 V systems?
No-DS1830AS/T&R is specified exclusively for 3.3 V systems, with VCC trip points ranging from 2.47 V to 3.15 V depending on TOL setting. For 5 V applications, the pin-compatible DS1830S or DS1830U (5 V version) must be used. Using DS1830AS/T&R in a 5 V environment risks incorrect trip detection and unreliable reset behavior.
What is the maximum sink current capability of DS1830AS/T&R reset outputs?
Each reset output (RST1, RST2, RST3) of DS1830AS/T&R can sink up to 20 mA when pulled to 0.4 V, supporting direct drive of standard logic inputs and moderate fan-out without external buffers. This rating applies under recommended operating conditions (-40°C to +85°C, VCC = 1.0 V to 5.5 V), and all outputs are open-drain with no internal pull-up.
Does DS1830AS/T&R require external components for basic operation?
No-DS1830AS/T&R operates autonomously with no external capacitors or resistors required for core functionality. Its internal 40 kΩ pull-up on PBRST, temperature-compensated reference, and oscillator eliminate discrete timing elements. Only optional external pull-ups may be added if stronger drive is needed on RST lines or PBRST, but DS1830AS/T&R functions fully with zero external components.
DS1830AS/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 3.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 10ms; 20ms; 50ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1830AS/T&R FAQ
1.How can I place an order for DS1830AS/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1830AS/T&R 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 DS1830AS/T&R reliable?
The price and inventory of DS1830AS/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1830AS/T&R is usually 5 days.
3.What payment methods are accepted for DS1830AS/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1830AS/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1830AS/T&R?
DS1830AS/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1830AS/T&R 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 DS1830AS/T&R?
For technical support, including DS1830AS/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1830AS/T&R requirements.
6.How does Aetrix verify that DS1830AS/T&R is sourced from the original manufacturer or authorized distributors?
All DS1830AS/T&R 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 DS1830AS/T&R meets industry standards.
7.What is the process for return or replacement of DS1830AS/T&R?
All DS1830AS/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1830AS/T&R, 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 DS1830AS/T&R part is unused and in its original packaging.
Return procedure for DS1830AS/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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