My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1812-5+
- Part No.:
- DS1812-5+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1812-5+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:267
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1812-5+ from Maxim Integrated is a 5V precision voltage-monitoring reset IC with active-high push-pull output, 4.62 V typical trip point, 150 ms reset timeout, and -40°C to +85°C operation - used to automatically restart microprocessors after power failure in embedded control systems.
For engineers reviewing the DS1812-5+ datasheet, DS1812-5+ pinout, DS1812-5+ application, or DS1812-5+ equivalent, key selection factors include VCC trip accuracy (±0.12 V), guaranteed 100–300 ms reset assertion window, push-pull drive capability (350 µA VOH, 10 mA IOL), and TO-92/SOT-23 package compatibility with space-constrained PCB layouts.
Technical Context
The DS1812-5+ integrates a temperature-compensated bandgap reference and comparator to detect VCC deviations below 4.50–4.75 V. It asserts RST immediately on undervoltage and holds it active for ≥100 ms after VCC recovery, ensuring processor stabilization before release.
Its CMOS push-pull output drives logic-level loads directly without external pull-up resistors. The device draws only 30–40 µA quiescent current and tolerates VCC slew rates as slow as 300 µs between trip thresholds, enabling robust operation across noisy or slowly ramping supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.50 V (min) to 4.75 V (max); ensures reliable reset initiation during 5V supply brownout |
| Reset Timeout | 100–300 ms; guarantees minimum hold time for microprocessor power/PLL stabilization |
| Output Type | Push-pull active-high; eliminates need for external pull-up resistor in MCU reset circuits |
| Supply Current | 30–40 µA; enables low-power always-on monitoring in battery-backed systems |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded controller environments |
| Output Drive | VOH = VCC–0.1 V @ 350 µA; supports direct interface to 5V TTL/CMOS inputs |
| VCC Slew Rate | 300 µs min; accommodates slow-ramping supplies without false triggering |
Pinout & Package
DS1812-5+ is available in TO-92 (3-pin through-hole) and SOT-23 (3-pin surface-mount) packages. Both share identical pin mapping and functional assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (TO-92) / 1 (SOT-23) | RST | Active-high push-pull reset output; drives MCU /RESET pin directly |
| 2 (TO-92) / 2 (SOT-23) | VCC | Power supply input; monitors 5V rail with ±0.12 V trip tolerance |
| 3 (TO-92) / 3 (SOT-23) | GND | Ground reference for internal comparator and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage sensing | Temperature-compensated reference ensures ±0.12 V trip accuracy over full -40°C to +85°C range |
| Guaranteed reset timing | 150 ms nominal timeout with 100–300 ms min–max window meets JEDEC JESD78 reliability requirements |
| Low-power operation | 30–40 µA ICC allows continuous monitoring in energy-sensitive applications without compromising battery life |
| Direct logic interface | Push-pull output eliminates external components and reduces BOM count in reset circuit design |
| Robust supply immunity | 300 µs minimum VCC slew rate tolerance prevents spurious resets during slow power-up/down transitions |
Applications
| Industrial PLC Controller | Smart Metering Module |
|---|---|
Use Scenario: Power interruption during firmware update causes partial write corruption in flash memory. IC Role / Device Role / Timing Role: DS1812-5+ detects VCC sag below 4.62 V and asserts RST for ≥100 ms to force controlled reboot before corrupted state propagates. Use Value: Prevents field failures by guaranteeing full system reset prior to reinitialization of real-time clock and metering registers. | Use Scenario: Mains voltage fluctuation triggers erratic behavior in metrology ASIC during billing cycle calculation. IC Role / Device Role / Timing Role: DS1812-5+ holds RST active until stable 5V rail is confirmed, delaying ASIC startup until ADC reference and crystal oscillator settle. Use Value: Eliminates erroneous kWh readings caused by premature initialization under marginal supply conditions. |
| Medical Diagnostic Handheld | Automotive Body Control Module |
Use Scenario: Battery voltage dip during cold cranking disrupts sensor calibration sequence in portable ultrasound unit. IC Role / Device Role / Timing Role: DS1812-5+ monitors 5V LDO output and extends reset pulse beyond 150 ms to ensure analog front-end and FPGA configuration complete before operation resumes. Use Value: Maintains diagnostic accuracy by preventing use of uncalibrated sensor data after transient brownout. | Use Scenario: Load-dump transients cause intermittent MCU lockup in door module ECU during vehicle jump-start. IC Role / Device Role / Timing Role: DS1812-5+ provides deterministic reset assertion on VCC deviation >0.38 V, independent of MCU internal POR circuitry. Use Value: Improves system robustness by adding external fail-safe reset layer that operates outside MCU silicon process variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–T462+ | Same 4.62 V trip, but open-drain output requiring external pull-up; 120 ms min reset timeout | Lacks push-pull drive; unsuitable where MCU requires active-high driven reset without resistor network | Select DS1812-5+ when board space or BOM count reduction is critical |
| TPS3808G33DBVR | 3.3 V fixed trip; adjustable delay option; 1.5 µA quiescent current; SOT-23 only | Not compatible with 5V systems; requires different VCC rail monitoring strategy | Choose DS1812-5+ for legacy 5V designs needing drop-in replacement without schematic revision |
Compared with MAX6326–T462+, DS1812-5+ eliminates external components via push-pull output; versus TPS3808G33DBVR, it delivers native 5V trip point and broader industrial temperature support, simplifying redesign of existing 5V reset circuits.
Availability
DS1812-5+ is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering modules, medical handheld diagnostics, and automotive body control units requiring stable component supply and long-term production continuity.
Supply support for DS1812-5+ 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 DS1812-5+ belongs to Maxim's EconoReset family - engineered for cost-sensitive, high-volume embedded systems requiring reliable, low-component-count power-on reset functionality with minimal layout overhead.
FAQ
What is the exact VCC trip voltage range for DS1812-5+?
The DS1812-5+ has a guaranteed VCC trip point between 4.50 V (minimum) and 4.75 V (maximum), with 4.62 V typical. This range is specified across the full operating temperature range (-40°C to +85°C) and is based on internal temperature-compensated voltage reference performance. DS1812-5+ uses this precise threshold to initiate reset during 5V supply brownout events.
Does DS1812-5+ require an external pull-up resistor on the RST pin?
No, DS1812-5+ features a push-pull active-high output stage, eliminating the need for an external pull-up resistor. Its RST pin drives high to VCC–0.1 V at 350 µA load and sinks up to 10 mA, enabling direct connection to standard 5V microcontroller reset inputs. DS1812-5+ thus reduces BOM count and PCB area compared to open-drain alternatives.
How long does DS1812-5+ hold the reset signal active after VCC recovery?
DS1812-5+ holds RST active for a guaranteed minimum of 100 ms and up to 300 ms after VCC returns to within tolerance, with 150 ms typical. This timing ensures sufficient stabilization of both the power supply and connected microprocessor before release. DS1812-5+ implements this delay internally without external timing components.
Is DS1812-5+ compatible with both TO-92 and SOT-23 footprints?
Yes, DS1812-5+ is offered in both TO-92 (through-hole) and SOT-23 (surface-mount) packages, with identical pin 1–2–3 assignment: RST–VCC–GND. The pinout and electrical characteristics are fully consistent across both packages, allowing seamless migration between assembly processes. DS1812-5+ maintains identical trip accuracy and timing specs regardless of package choice.
What is the maximum supply voltage DS1812-5+ can tolerate on the VCC pin?
DS1812-5+ supports an absolute maximum VCC rating of +7.0 V, though its recommended operating range is 0 V to 5.5 V. Operation above 5.5 V is not specified for functional performance and may impact long-term reliability. DS1812-5+ is designed specifically for 5V systems, with trip point optimized for that rail - exceeding 5.5 V voids guaranteed parametric behavior.
DS1812-5+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1812-5+ FAQ
1.How can I place an order for DS1812-5+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1812-5+ 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 DS1812-5+ reliable?
The price and inventory of DS1812-5+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1812-5+ is usually 5 days.
3.What payment methods are accepted for DS1812-5+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1812-5+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1812-5+?
DS1812-5+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1812-5+ 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 DS1812-5+?
For technical support, including DS1812-5+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1812-5+ requirements.
6.How does Aetrix verify that DS1812-5+ is sourced from the original manufacturer or authorized distributors?
All DS1812-5+ 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 DS1812-5+ meets industry standards.
7.What is the process for return or replacement of DS1812-5+?
All DS1812-5+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1812-5+, 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 DS1812-5+ part is unused and in its original packaging.
Return procedure for DS1812-5+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1812-5+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
