My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1232LPS/T&R
- Part No.:
- DS1232LPS/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
DS1232LPS/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,381
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1232LPS/T&R from Maxim Integrated (formerly Dallas Semiconductor) is a low-power microprocessor supervisory IC that monitors VCC supply voltage, implements a watchdog timer, and manages pushbutton reset. It delivers 50 µA quiescent current, supports 5% or 10% VCC threshold detection (4.75 V or 4.5 V), and guarantees ≥250 ms active reset pulse width. Used in embedded controllers where reliable power-up sequencing and software fault recovery are critical.
For engineers reviewing the DS1232LPS/T&R datasheet, DS1232LPS/T&R pinout, DS1232LPS/T&R application, or DS1232LPS/T&R equivalent, key selection factors include its dual RST/RST outputs (active-high and open-drain active-low), selectable watchdog timeout (150/600/1200 ms), TOL-configurable trip point, industrial temperature range (–40°C to +85°C), and compatibility with 8-pin SOIC (150-mil) and 16-pin SOIC packages.
Technical Context
The DS1232LPS/T&R integrates three independent monitoring functions: precision VCC comparator with temperature-compensated reference, debounced pushbutton reset input (PBRST), and programmable watchdog timer triggered by ST strobe. Its dual-reset architecture provides both CMOS-compatible active-high RST and open-drain active-low RST for flexible interface with diverse microcontroller reset inputs.
Watchdog timeout is set via TD pin (GND = ~150 ms, float = ~600 ms, VCC = ~1.2 s), and power-fail detection activates reset when VCC falls below threshold defined by TOL connection - grounded for 4.75 V trip, tied to VCC for 4.5 V trip. Reset remains asserted ≥250 ms after VCC recovery to ensure processor stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 50 µA - enables battery-backed or ultra-low-power embedded systems without compromising supervision reliability |
| VCC Trip Point (TOL=GND) | 4.50–4.74 V - ensures reset assertion before 5 V microcontrollers enter undefined operation |
| VCC Trip Point (TOL=VCC) | 4.25–4.49 V - accommodates tighter-tolerance 5 V rails or legacy designs requiring lower threshold |
| Watchdog Timeout Options | ~150 ms / ~600 ms / ~1.2 s - selectable via TD pin to match software execution cycles and system boot timing |
| Reset Pulse Width | ≥250 ms - guarantees sufficient time for power supply settling and CPU initialization on power-up or fault recovery |
| Operating Temperature | –40°C to +85°C - certified for industrial-grade deployment in harsh environments |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V logic families and regulated 5 V supplies |
Pinout & Package
DS1232LPS/T&R is supplied in an 8-pin SOIC package (150-mil width), with pinout identical to DS1232LPS-2 variant per mechanical drawings.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up; debounced to generate ≥250 ms reset pulse on release |
| TD | Watchdog Timeout Select | Configures watchdog period: GND = ~150 ms, float = ~600 ms, VCC = ~1.2 s |
| TOL | Threshold Select | GND → 4.75 V trip; VCC → 4.5 V trip; sets VCC monitor sensitivity |
| GND | Ground Reference | Return path for all internal comparators, timers, and output drivers |
| RST | Active-High Reset Output | CMOS-compatible push-pull output; asserts high during power fail, watchdog timeout, or PBRST event |
| RST | Active-Low Reset Output | Open-drain output; requires external pull-up; supports wired-OR reset bus architectures |
| ST | Strobe Input | High-to-low transition resets watchdog timer; must be toggled within timeout window to prevent reset |
| VCC | Power Supply Input | +5 V supply rail; powers internal circuitry and serves as reference for VCC monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Dual Reset Outputs | RST (push-pull, active-high) and RST (open-drain, active-low) enable direct interfacing with both modern and legacy microcontrollers |
| Selectable VCC Threshold | TOL pin allows field-configurable 5% (4.75 V) or 10% (4.5 V) supply tolerance detection without component change |
| Programmable Watchdog Timer | Three discrete timeout options via TD pin eliminate need for external RC timing components or firmware reconfiguration |
| Guaranteed Power-On Reset | Internal 250 ms minimum reset hold time ensures stable clock and memory initialization before CPU execution begins |
| Industrial Temperature Range | –40°C to +85°C operation validated across full supply range supports deployment in factory automation and outdoor equipment |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: Microcontroller-based logic sequencer in programmable logic controller subjected to voltage sags and EMI-induced software hangs. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, hardware watchdog, and manual reset - ensures deterministic recovery from brownouts or code lockups. Use Value: Prevents spurious I/O activation during unstable power; 250 ms reset hold guarantees clean state restoration before ladder logic scan restarts. | Use Scenario: Portable ultrasound unit with battery backup and real-time image processing MCU. IC Role / Device Role / Timing Role: Low-power supervisor maintaining system integrity during battery-swapping or AC adapter disconnection events. Use Value: 50 µA quiescent current extends battery life; dual RST outputs support both ARM core reset and FPGA configuration reset simultaneously. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: CAN-connected BCM exposed to load-dump transients and cold-cranking voltage dips. IC Role / Device Role / Timing Role: Power supervisor detecting VCC drop below 4.5 V (TOL=VCC) and asserting reset before MCU enters undefined state. Use Value: Trip point margin prevents nuisance resets during cranking; watchdog timer detects firmware stalls caused by CAN bus errors. | Use Scenario: ANSI C12.22-compliant meter with EEPROM data logging and tamper detection. IC Role / Device Role / Timing Role: Supervisor ensuring safe shutdown and restart during grid interruptions or battery depletion. Use Value: Open-drain RST output interfaces directly with EEPROM write-protect control; ≥250 ms reset ensures EEPROM write cycle completion before power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+T | Single active-low reset output; fixed 2.93 V threshold; no TOL pin or dual reset; 1.6 µA quiescent current | Designed for 3.3 V systems; lacks watchdog and pushbutton reset; optimized for ultra-low-power sleep modes | Choose for 3.3 V battery-powered devices needing minimal current draw but no watchdog or manual reset |
| TPS3823-33DBVR | Fixed 3.08 V reset threshold; single active-low open-drain output; watchdog with 1.6 s timeout only; 15 µA quiescent current | Targeted at TI MCU platforms; no VCC threshold select or dual reset; includes manual reset but no debounce | Prefer for cost-sensitive 3.3 V designs with TI ecosystem integration, where TPS3823-33DBVR's smaller SOT-23 package saves board space |
Compared with MAX6326US29D3+T and TPS3823-33DBVR, DS1232LPS/T&R uniquely supports 5 V systems with configurable trip points, dual reset signaling, and integrated pushbutton debounce - making it suitable for industrial 5 V controllers where flexibility and robustness outweigh ultra-low-current requirements.
Availability
DS1232LPS/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for DS1232LPS/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 (acquired by Analog Devices in 2021) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The DS1232LPS/T&R belongs to Maxim's MicroMonitor™ supervisory IC family, engineered specifically for reliable power-on reset, supply voltage monitoring, and watchdog protection in 5 V microcontroller systems.
FAQ
What is the function of the TOL pin on the DS1232LPS/T&R?
The TOL pin on the DS1232LPS/T&R selects the VCC detection threshold: when grounded, it configures a 4.75 V trip point (5% tolerance); when tied to VCC, it sets a 4.5 V trip point (10% tolerance). This allows field adaptation to different 5 V supply tolerances without changing the DS1232LPS/T&R part number or PCB layout.
Does the DS1232LPS/T&R provide both active-high and active-low reset outputs?
Yes, the DS1232LPS/T&R provides two independent reset outputs: RST is a push-pull active-high output, and RST is an open-drain active-low output. This dual-output architecture enables direct compatibility with microcontrollers requiring either reset polarity, including those with internal pull-ups or requiring wired-OR reset busing - a key capability of the DS1232LPS/T&R.
How is the watchdog timeout configured on the DS1232LPS/T&R?
The watchdog timeout on the DS1232LPS/T&R is set using the TD pin: connecting TD to GND yields ~150 ms, leaving TD floating yields ~600 ms, and connecting TD to VCC yields ~1.2 s. The DS1232LPS/T&R does not support disabling the watchdog - it must be strobed via the ST input at intervals shorter than the selected timeout to prevent reset assertion.
What package type is used for the DS1232LPS/T&R part number?
The DS1232LPS/T&R is supplied in an 8-pin SOIC package with 150-mil body width (also referenced as DS1232LPS-2 in datasheet mechanical drawings). This package matches industry-standard footprint dimensions and is compatible with automated pick-and-place assembly and reflow soldering processes used for the DS1232LPS/T&R.
Is the DS1232LPS/T&R suitable for industrial temperature applications?
Yes, the DS1232LPS/T&R is rated for operation from –40°C to +85°C, meeting industrial temperature requirements. This specification is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the official DS1232LP/LPS datasheet, and applies to the DS1232LPS/T&R variant as a member of the DS1232LP/LPS family.
DS1232LPS/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.37V, 4.62V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DS1232LPS/T&R FAQ
1.How can I place an order for DS1232LPS/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1232LPS/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 DS1232LPS/T&R reliable?
The price and inventory of DS1232LPS/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 DS1232LPS/T&R is usually 5 days.
3.What payment methods are accepted for DS1232LPS/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1232LPS/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1232LPS/T&R?
DS1232LPS/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1232LPS/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 DS1232LPS/T&R?
For technical support, including DS1232LPS/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1232LPS/T&R requirements.
6.How does Aetrix verify that DS1232LPS/T&R is sourced from the original manufacturer or authorized distributors?
All DS1232LPS/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 DS1232LPS/T&R meets industry standards.
7.What is the process for return or replacement of DS1232LPS/T&R?
All DS1232LPS/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1232LPS/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 DS1232LPS/T&R part is unused and in its original packaging.
Return procedure for DS1232LPS/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1232LPS/T&R 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…
