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Analog Devices Inc./Maxim Integrated DS1830AU+T&R
- Part No.:
- DS1830AU+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1830AU+T&R.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,733
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Product details
Overview
DS1830AU+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 up to 500ms. It features pushbutton reset input (PBRST), tolerance-select input (TOL), time-delay-select input (TD), and operates from -40°C to +85°C in 8-pin µSOP package. Used in multi-rail power-up sequencing for FPGA-based embedded systems.
For engineers reviewing the DS1830AU+T&R datasheet, DS1830AU+T&R pinout, DS1830AU+T&R application, or DS1830AU+T&R equivalent, key selection criteria include VCC trip point accuracy (±0.13V at 3.06V typ), TD-selectable reset timing (10/20/50ms for RST1), open-drain output drive (20mA sink), and TOL-configurable voltage tolerance (5%/10%/20% for 3.3V supply).
Technical Context
The DS1830AU+T&R implements a precision temperature-compensated bandgap reference and comparator to detect VCC deviations against three selectable trip thresholds (2.98V–3.15V, 2.80V–2.97V, or 2.47V–2.64V depending on TOL state). Its internal oscillator drives a clock chain that enforces fixed 1×, 5×, and 10× timing ratios between RST1, RST2, and RST3 release delays.
Reset assertion occurs within 8µs of VCC falling below the selected VCCTP; release follows a TD-determined delay after VCC returns to tolerance. The PBRST input is debounced and internally pulled up to VCC via 40kΩ, requiring ≥1ms low pulse to initiate manual reset sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point (TOL=VCC) | 2.98V to 3.15V - sets precise 3.3V supply monitoring threshold with ±0.085V tolerance |
| RST1 Minimum Delay (TD=GND) | 10ms - ensures minimum hold time for primary logic rail before release |
| RST2/RST3 Timing Ratio | 5× and 10× RST1 - guarantees strict power-rail sequencing order across multiple domains |
| Output Sink Current | 20mA - supports direct driving of microcontroller / FPGA reset inputs without external buffers |
| Operating Current (Standby) | 10µA to 25µA - enables ultra-low-power operation in battery-backed or always-on systems |
| Input Leakage (PBRST/TD/TOL) | ±1.0µA - minimizes interference from PCB leakage or noise coupling on control pins |
| VCC Detect to RST Assertion | 5µs to 8µs - provides fast response to brownout events critical for data integrity preservation |
Pinout & Package
DS1830AU+T&R is housed in an 8-pin µSOP (118-mil width) package with exposed pad for thermal performance and space-constrained PCB layouts.
| 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 required |
| 2 TD | Time Delay Select Input | Configures RST1 delay: GND=10ms, Float=20ms, VCC=50ms; sampled only during power-up |
| 3 TOL | VCC Tolerance Select Input | Sets trip point hysteresis: VCC=5%, GND=10%, Open=20% - determines VCCTP window for 3.3V supply |
| 4 GND | Ground Reference | Primary return path for internal reference, comparator, and output drivers |
| 5 RST3 | Reset Output 3 | Active-low, open-drain; releases last in sequence (10× RST1 delay); requires external pull-up |
| 6 RST2 | Reset Output 2 | Active-low, open-drain; releases second (5× RST1 delay); shares same timing architecture as RST3 |
| 7 RST1 | Reset Output 1 | Active-low, open-drain; releases first (base delay); initiates controlled power-up cascade |
| 8 VCC | Power Supply Input | 3.3V nominal supply; supports 1.0V–5.5V range; powers internal reference, logic, and drivers |
Key Features
| Feature | Design Value |
|---|---|
| Triple sequenced reset outputs | Enables deterministic power-up ordering across CPU, memory, and peripheral rails without external timing components |
| Programmable VCC trip point | Three TOL-selectable thresholds ensure compatibility with varying 3.3V regulator tolerances and aging effects |
| TD-selectable timing ratios | Fixed 1:5:10 delay relationship eliminates need for discrete RC networks or additional timers |
| Internal 40kΩ PBRST pull-up | Reduces BOM count by eliminating external resistor while maintaining noise-immune pushbutton interface |
| 8µs max VCC-fall detection latency | Prevents metastability and latch-up in downstream logic during rapid brownout transitions |
Applications
| Industrial PLC Controller | FPGA-Based Test Equipment |
|---|---|
Use Scenario: Multi-rail power system with 3.3V core, 2.5V I/O, and 1.2V transceiver supplies requiring staggered initialization. IC Role / Device Role / Timing Role: DS1830AU+T&R acts as master reset sequencer, asserting RST1 to CPU domain first, then RST2 to memory controller, and finally RST3 to high-speed SerDes block. Use Value: Guarantees setup time compliance for FPGA configuration and prevents bus contention during power ramp. | Use Scenario: Portable automated test instrument with battery backup and cold-start capability. IC Role / Device Role / Timing Role: DS1830AU+T&R provides both power-on reset and pushbutton-initiated re-initialization, with TD set to float for 20ms/100ms/200ms delays. Use Value: Eliminates need for separate supervisor IC and manual reset debouncer circuit, reducing board area by >12mm². |
| Medical Imaging Subsystem | Automotive ADAS Camera Module |
Use Scenario: ASIC-based image processing unit with strict power sequencing requirements per ISO 13849. IC Role / Device Role / Timing Role: DS1830AU+T&R monitors 3.3V analog supply (TOL=VCC) and asserts RST1→RST2→RST3 to isolate sensor interface, ADC, and digital engine in defined order. Use Value: Meets 10ms minimum reset hold time requirement for analog front-end stabilization before digital activation. | Use Scenario: Vision ECU with dual 3.3V rails (one for ISP, one for MIPI PHY) and safety-critical boot validation. IC Role / Device Role / Timing Role: DS1830AU+T&R serves as ASIL-B compliant reset manager, using TOL=GND for tighter 2.80V–2.97V trip window and TD=GND for shortest 10ms/50ms/100ms sequence. Use Value: Supports diagnostic coverage for power-supply fault detection per ISO 26262 Annex D. |
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-output, no sequencing; 3.3V-only; 14ms fixed reset timeout; no TOL/TD inputs | Lacks multi-output sequencing and programmable trip points; suitable only for simple single-rail resets | Select when only basic 3.3V power-on reset is needed and board space allows larger SO-8 package |
| TPS3808G18DBVR | Dual-output (not triple); adjustable reset threshold (0.4V–5.5V); no built-in sequencing logic; requires external timing | Requires external RC network to emulate RST2/RST3 delays; no native cascade support | Choose if fine-grained threshold tuning is prioritized over guaranteed sequencing reliability |
Compared with MAX6816ESE+ and TPS3808G18DBVR, DS1830AU+T&R uniquely delivers factory-trimmed triple-output sequencing with zero external components, making it optimal for compact, high-reliability 3.3V systems where deterministic power-up order is mandatory.
Availability
DS1830AU+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, FPGA-based test equipment, medical imaging subsystems, and automotive ADAS camera modules requiring stable component supply and long-term production continuity.
Supply support for DS1830AU+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 and mixed-signal ICs for industrial, medical, and communications applications, emphasizing high reliability and low power.
The DS1830AU+T&R belongs to Maxim's supervisory IC product line, engineered specifically for deterministic multi-rail power sequencing in space-constrained, mission-critical embedded systems operating at 3.3V.
FAQ
What is the function of the TOL pin on the DS1830AU+T&R?
The TOL pin on the DS1830AU+T&R selects the VCC trip point hysteresis: tied to VCC yields ±5% (2.98V–3.15V), to GND yields ±10% (2.80V–2.97V), and left open yields ±20% (2.47V–2.64V). This allows adaptation to different 3.3V regulator tolerances without redesigning the power-monitoring circuit. DS1830AU+T&R samples TOL only during initial power-up before VCC exceeds the lowest trip threshold.
How does the TD pin affect reset timing in DS1830AU+T&R?
The TD pin configures the base delay for RST1: grounded gives 10ms, floating gives 20ms, and tied to VCC gives 50ms. RST2 and RST3 then follow at exact 5× and 10× those durations respectively. DS1830AU+T&R uses an internal oscillator to maintain ratio fidelity across temperature and voltage, ensuring repeatable sequencing independent of external components.
Can DS1830AU+T&R be used with a 5V supply?
No - DS1830AU+T&R is specified exclusively for 3.3V systems. Its VCCTP ranges (2.47V–3.15V) and internal reference are calibrated for 3.3V nominal operation. For 5V applications, the pin-compatible DS1830U (5V version) must be used; substituting DS1830AU+T&R risks incorrect trip-point detection and unreliable reset behavior.
What is the maximum sink current capability of DS1830AU+T&R reset outputs?
Each reset output (RST1, RST2, RST3) of DS1830AU+T&R can sink up to 20mA when pulled to 0.4V, enabling direct connection to most microcontrollers and FPGAs without external drivers. This specification is guaranteed across -40°C to +85°C and ensures robust noise immunity and signal integrity under load.
Is DS1830AU+T&R compatible with cascaded reset configurations?
Yes - DS1830AU+T&R supports cascade operation: RST3 of a master device can drive PBRST of a slave unit to extend sequencing depth. DS1830AU+T&R documentation specifies that TOL settings must ensure the master's VCCTP exceeds the slave's to guarantee proper ripple-through behavior during brownout recovery.
DS1830AU+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-uMAX/uSOP
DS1830AU+T&R FAQ
1.How can I place an order for DS1830AU+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1830AU+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 DS1830AU+T&R reliable?
The price and inventory of DS1830AU+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 DS1830AU+T&R is usually 5 days.
3.What payment methods are accepted for DS1830AU+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1830AU+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1830AU+T&R?
DS1830AU+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1830AU+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 DS1830AU+T&R?
For technical support, including DS1830AU+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1830AU+T&R requirements.
6.How does Aetrix verify that DS1830AU+T&R is sourced from the original manufacturer or authorized distributors?
All DS1830AU+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 DS1830AU+T&R meets industry standards.
7.What is the process for return or replacement of DS1830AU+T&R?
All DS1830AU+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1830AU+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 DS1830AU+T&R part is unused and in its original packaging.
Return procedure for DS1830AU+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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