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Analog Devices Inc./Maxim Integrated DS1830AS
- Part No.:
- DS1830AS
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1830AS.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,360
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Product details
Overview
DS1830AS from Maxim Integrated is a 3.3V triple-output reset sequencer IC that monitors VCC for out-of-tolerance conditions and provides time-sequenced active-low reset signals (RST1, RST2, RST3) with programmable delays (10/20/50 ms min for RST1), pushbutton override, and selectable voltage trip points (2.47–3.15 V). It enables orderly power-up in multi-rail embedded systems such as industrial controllers and telecom line cards.
For engineers reviewing the DS1830AS datasheet, DS1830AS pinout, DS1830AS application, or DS1830AS equivalent, key selection criteria include its 3.3V supply operation, three independently timed open-drain reset outputs, TOL/TD-configurable trip tolerance and delay timing, and -40°C to +85°C industrial temperature range.
Technical Context
The DS1830AS implements a precision temperature-compensated voltage reference and comparator to detect VCC deviations against user-selected trip thresholds (via TOL pin: GND/NC/VCC), triggering a deterministic reset sequence. Its internal oscillator drives a clock chain that scales RST2 and RST3 delays as exact multiples (5× and 10×) of the RST1 delay set by TD pin state.
Reset assertion occurs on power transients or manual PBRST pull-down (≥1 ms), with all outputs held 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 at boot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 3.3V nominal; operates from 1.0V to 5.5V - supports brown-out detection across wide input range |
| VCC Trip Range | 2.47V–3.15V (TOL-selectable) - enables precise match to 3.3V system rail tolerances |
| RST1 Delay Options | 10ms / 20ms / 50ms min (TD = GND / NC / VCC) - sets primary reset release timing |
| RST2 & RST3 Timing | 5× and 10× RST1 delay - ensures strict sequencing without external timing components |
| Operating Temp | -40°C to +85°C - qualified for industrial environment deployment |
| Supply Current | 10µA to 25µA standby - ultra-low power for always-on monitoring |
| Output Type | Open-drain, active-low - allows wired-OR with other reset sources and flexible voltage translation |
Pinout & Package
DS1830AS is housed in an 8-pin SOIC (150-mil) package with standard JEDEC MS-012AC footprint and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PBRST | Pushbutton Reset Input | Active-low manual reset trigger; internally pulled up to VCC (40kΩ); ≥1ms low pulse initiates full reset sequence |
| 2 TD | Time Delay Select Input | Configures RST1 delay (10/20/50 ms); sampled at power-up; determines RST2/RST3 scaling |
| 3 TOL | VCC Tolerance Select Input | Sets trip threshold (2.47–3.15 V); sampled only while VCC < lowest trip value; locks at boot |
| 4 GND | Ground Reference | Primary return path for internal reference and comparator; must be low-impedance |
| 5 RST3 | Reset Output 3 | Active-low open-drain output; released last (10× RST1 delay); drives downstream logic or FPGA config |
| 6 RST2 | Reset Output 2 | Active-low open-drain output; released second (5× RST1 delay); typically controls intermediate power domain |
| 7 RST1 | Reset Output 1 | Active-low open-drain output; released first (programmed delay); commonly resets microcontroller core |
| 8 VCC | Power Supply Input | 3.3V supply input; powers internal reference, comparator, and timing circuitry; monitored for trip condition |
Key Features
| Feature | Design Value |
|---|---|
| Triple sequenced reset outputs | Enables controlled power-up of multi-voltage systems (e.g., core, I/O, peripheral rails) without external timers |
| Selectable VCC trip threshold | Three tolerance options (±5%, ±10%, ±20%) via TOL pin - eliminates need for external resistor dividers |
| Programmable reset timing | Three discrete RST1 delay settings (10/20/50 ms) scaled to RST2/RST3 - replaces RC networks and discrete logic |
| Pushbutton reset with debounce | Internal 1ms debouncing and 40kΩ pull-up - reduces BOM count and PCB space vs. discrete switch + RC |
| Ultra-low standby current | 10–25 µA typical - suitable for battery-backed or energy-sensitive applications requiring continuous monitoring |
Applications
| Industrial PLC Controller | Telecom Line Card |
|---|---|
Use Scenario: Power-up of dual-core processor, FPGA, and analog front-end with staggered enable timing. IC Role / Device Role / Timing Role: DS1830AS generates RST1 for CPU core, RST2 for FPGA configuration, and RST3 for ADC/DAC power domain - enforcing safe initialization order. Use Value: Prevents metastability and latch-up by ensuring FPGA config completes before analog subsystems power up. | Use Scenario: Hot-swap insertion of line card into backplane with multiple 3.3V rails and management MCU. IC Role / Device Role / Timing Role: DS1830AS monitors main 3.3V rail and asserts sequenced resets to management MCU (RST1), PHY (RST2), and clock generator (RST3). Use Value: Guarantees PHY reset completes before clock generator enables, avoiding signal integrity faults during insertion. |
| Medical Imaging Module | Automotive ADAS Camera ECU |
Use Scenario: Cold start of image sensor array, ISP processor, and high-speed serializer under strict timing constraints. IC Role / Device Role / Timing Role: DS1830AS delivers RST1 to ISP, RST2 to serializer, and RST3 to sensor interface - aligned to data pipeline readiness. Use Value: Eliminates frame corruption at boot by synchronizing reset release with internal PLL lock times. | Use Scenario: Power-up of vision processor, MIPI CSI-2 transmitter, and power management IC in camera control unit. IC Role / Device Role / Timing Role: DS1830AS applies RST1 to vision SoC, RST2 to MIPI PHY, and RST3 to PMIC - matching functional dependency chain. Use Value: Ensures PMIC sequencing completes before MIPI link training begins, preventing protocol timeout failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset sequencer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816 | Single active-low reset output; no sequencing; fixed 200ms delay; 3.3V only | Lacks RST2/RST3 outputs and TD/TOL configurability - suitable only for simple single-rail systems | Choose MAX6816 only if triple sequencing is unnecessary and fixed delay suffices. |
| TPS3808G33 | Single reset output; adjustable delay (1–10s) via capacitor; 3.3V supply; no pushbutton input | No sequenced outputs or manual reset - requires external logic for multi-rail coordination | Select TPS3808G33 when long, capacitor-tuned delays are needed but sequencing is handled elsewhere. |
Compared with MAX6816 and TPS3808G33, the DS1830AS uniquely integrates three precisely scaled reset outputs, pushbutton override, and dual-axis configurability (trip threshold + delay), eliminating external components required to achieve equivalent functionality in multi-rail 3.3V systems.
Availability
DS1830AS is available at Aetrix Electronics and suitable for industrial PLC controllers, telecom line cards, medical imaging modules, and automotive ADAS camera ECUs requiring stable component supply and guaranteed long-term availability.
Supply support for DS1830AS 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, communications, and computing applications.
The DS1830AS belongs to Maxim's power-supply monitoring and reset sequencer product line, engineered specifically for reliable, configurable power-up sequencing in 3.3V multi-rail embedded systems.
FAQ
What is the function of the TOL pin on the DS1830AS?
The TOL pin on the DS1830AS selects the VCC trip threshold tolerance: GND sets ±10% (2.80–2.97 V), open sets ±20% (2.47–2.64 V), and VCC sets ±5% (2.98–3.15 V). This pin is sampled only during initial power-up before VCC exceeds the lowest trip point, locking the configuration. The DS1830AS uses this setting to determine when the 3.3V supply is out-of-tolerance and triggers the reset sequence accordingly.
How does the TD pin affect reset timing in the DS1830AS?
The TD pin on the DS1830AS configures the minimum active time for RST1: grounded yields 10 ms, floating yields 20 ms, and tied to VCC yields 50 ms. RST2 and RST3 are then automatically set to 5× and 10× that base delay. This scaling is generated by an internal oscillator and clock chain, ensuring consistent ratios across temperature and voltage. The DS1830AS relies on this TD-driven timing to enforce strict power-up sequencing without external components.
Can the DS1830AS be used in a 5V system?
No, the DS1830AS is specified exclusively for 3.3V systems, with VCC trip thresholds ranging from 2.47V to 3.15V. Its datasheet explicitly defines it as a "3.3V Reset Sequencer", and its electrical characteristics (e.g., VCCTP values, ICC) are characterized only for 3.3V operation. For 5V applications, the pin-compatible DS1830 or DS1830S should be used instead. The DS1830AS must not be substituted in 5V designs without redesigning the power-monitoring interface.
What is the purpose of the PBRST pin on the DS1830AS?
The PBRST pin on the DS1830AS provides a manual reset override: pulling it low for ≥1 ms initiates a full reset sequence regardless of VCC status. It features internal 40kΩ pull-up and hardware debouncing, eliminating external RC networks. When asserted, all three reset outputs (RST1, RST2, RST3) go active and release in sequence after the TD-configured delays. This function allows field service or software-triggered reinitialization without power cycling - a key capability built into the DS1830AS design.
Does the DS1830AS support cascading for more than three reset domains?
Yes, the DS1830AS supports cascade configurations using RST3 to drive the PBRST input of a second DS1830AS (or compatible sequencer), enabling extended sequencing beyond three outputs. The application note specifies that master and slave TOL pins must be configured so the master's VCCTP exceeds the slave's, ensuring ripple-through behavior during power-up. This capability is documented in Figure 4 of the DS1830AS datasheet and is a verified use case for complex multi-stage power systems relying on the DS1830AS.
DS1830AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for DS1830AS through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1830AS 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 reliable?
The price and inventory of DS1830AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1830AS is usually 5 days.
3.What payment methods are accepted for DS1830AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1830AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1830AS?
DS1830AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1830AS 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?
For technical support, including DS1830AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1830AS requirements.
6.How does Aetrix verify that DS1830AS is sourced from the original manufacturer or authorized distributors?
All DS1830AS 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 meets industry standards.
7.What is the process for return or replacement of DS1830AS?
All DS1830AS units undergo pre-shipment inspection (PSI). If there is an issue with DS1830AS, 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 part is unused and in its original packaging.
Return procedure for DS1830AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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