My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1232CWE+T
- Part No.:
- MAX1232CWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX1232CWE+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1232CWE+T from Maxim Integrated is a microprocessor supervisory circuit that monitors +5V power supply voltage, provides 250ms reset pulse on power-up/down/brownout, implements programmable watchdog timer (150ms/600ms/1.2s), accepts debounced manual reset input, and delivers dual active-high/active-low reset outputs - used in embedded controllers for reliable power-on initialization and software fault recovery.
For engineers reviewing the MAX1232CWE+T datasheet, MAX1232CWE+T pinout, MAX1232CWE+T application, or MAX1232CWE+T equivalent, this page delivers verified package mapping (16-pin wide SO), confirmed reset timing (250ms min), tolerance selection logic (5% or 10% via TOL pin), watchdog timeout configuration (TD pin states), and dual RST/RST output behavior - all critical for μP reset integrity validation.
Technical Context
The MAX1232CWE+T integrates three core supervision functions: precision voltage detection with digitally selectable 5% (+4.62V typ) or 10% (+4.37V typ) VCC trip points, a falling-edge-triggered watchdog timer whose timeout is set by TD pin voltage (GND = 150ms, open = 600ms, VCC = 1.2s), and a debounced manual reset input (PBRST) requiring ≥20ms low assertion to guarantee activation.
It features dual complementary reset outputs: RST (push-pull, active-high) and RST (open-drain, active-low), enabling direct interface with both standard logic and pull-up–dependent microcontroller reset inputs; no external components are required for basic operation, and operating current is specified at 50–200µA over 0°C to +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - supports standard +5V rail with ±10% margin; operates across full range without derating. |
| Reset Pulse Width | 250ms minimum - ensures stable power and μP initialization before release; guaranteed across temperature. |
| VCC Trip Point | 4.62V (5% tol, TOL=GND) or 4.37V (10% tol, TOL=VCC) - precise brownout detection with digital selectability. |
| Watchdog Timeout | 150ms / 600ms / 1.2s - selectable via TD pin state; enables tuning to software execution cycle time. |
| Operating Current | 50µA to 200µA - ultra-low quiescent draw suitable for battery-backed or energy-sensitive systems. |
| PBRST Input Delay | 1ms–20ms debounce window - rejects mechanical bounce while guaranteeing recognition of ≥20ms pushbutton press. |
| Output Drive | RST: ±12mA push-pull; RST: 10mA sink (open-drain) - drives standard CMOS/TTL loads without external buffers. |
Pinout & Package
MAX1232CWE+T is housed in a 16-pin wide SO package (package code W16+1, outline 21-0042), RoHS-compliant with lead-free finish. Pin pitch is 0.050", body width 7.5mm, and thermal pad optional per land pattern 90-0107.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 10, 12, 14, 16 | N.C. | No internal connection - must be left unconnected; not tied to GND or VCC. |
| 2 | PBRST | Debounced active-low manual reset input; internal ~40kΩ pull-up to VCC; ignores <1ms glitches. |
| 4 | TD | Watchdog timebase select: GND = 150ms, open = 600ms, VCC = 1.2s timeout period. |
| 6 | TOL | Tolerance select: GND = 5% VCC trip (+4.62V), VCC = 10% trip (+4.37V). |
| 8 | GND | Analog/digital ground reference - single ground plane required; decoupling capacitor recommended at VCC pin. |
| 9 | RST | Active-high push-pull reset output - drives high/low directly; sources/sinks up to ±12mA. |
| 11 | RST | Active-low open-drain reset output - requires external pull-up; sinks up to 10mA. |
| 13 | ST | Watchdog strobe input - triggered only on falling edge; must be toggled within timeout window. |
| 15 | VCC | +5V supply input - accepts 4.5V–5.5V; 0.1µF ceramic decoupling capacitor required adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Reset Outputs | RST (push-pull, active-high) and RST (open-drain, active-low) enable simultaneous compatibility with diverse μP reset architectures. |
| Digitally Selectable Voltage Threshold | TOL pin selects between 4.62V (5%) and 4.37V (10%) trip points - eliminates need for external resistor dividers. |
| Configurable Watchdog Timeout | Three discrete timeout values (150ms/600ms/1.2s) set solely by TD pin voltage - no external timing components required. |
| Integrated Debounce Logic | PBRST input rejects transients <1ms and guarantees response to ≥20ms presses - removes need for RC filter or firmware debounce. |
| Ultra-Low Power Operation | 50–200µA ICC over full temperature range - extends battery life in portable or always-on monitoring systems. |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Microcontroller-based programmable logic controllers require deterministic reset sequencing during AC line dropouts or brownouts. IC Role / Device Role / Timing Role: MAX1232CWE+T monitors 5V rail, asserts dual RST outputs for 250ms upon VCC fall below 4.37V (10% tol), and recovers cleanly after stabilization. Use Value: Prevents spurious I/O state changes and firmware corruption during transient supply events - validated for 0°C to +70°C industrial ambient. |
Use Scenario: Portable ultrasound or blood glucose analyzers use battery-backed μPs where power integrity affects measurement accuracy and safety compliance. IC Role / Device Role / Timing Role: MAX1232CWE+T provides low-current (50µA) supervision, detects 5% VCC deviation, and triggers watchdog reset if ST strobe halts due to software lockup. Use Value: Enables Class II medical device certification by ensuring fail-safe restart without external timing components or layout dependencies. |
| Communications Baseband Processors | Smart Energy Meters |
Use Scenario: LTE/FPGA-based baseband processors demand synchronized reset release across multiple voltage domains during cold start. IC Role / Device Role / Timing Role: MAX1232CWE+T's 250ms reset pulse aligns with FPGA configuration time; RST and RST drive separate reset trees for analog/digital subsystems. Use Value: Eliminates race conditions during power-up by guaranteeing minimum hold time - verified with 1.66mV/sec VCC slew rate per datasheet Figure 6. |
Use Scenario: ANSI C12.20-compliant electricity meters require tamper-resistant reset behavior and long-term reliability under wide temperature swings. IC Role / Device Role / Timing Role: MAX1232CWE+T operates across 0°C to +70°C, uses TOL pin to set 5% trip point for tighter regulation, and delivers 1.2s watchdog timeout (TD=VCC) for extended firmware cycles. Use Value: Meets ANSI/IEEE metering standards for reset duration consistency and brownout immunity without calibration drift over 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT46D3+ | Single active-low open-drain reset; fixed 4.63V threshold; no watchdog or manual reset; 1.6µA IQ. | Lacks dual reset outputs, programmable watchdog, and PBRST - suitable only for simple reset-only use cases. | Select when minimal quiescent current and fixed threshold suffice, and system design omits watchdog or manual override. |
| TPS3808G33DBVR | Fixed 3.3V supply monitor; adjustable reset delay (0–10s); no manual reset input; 16µA IQ. | Designed for 3.3V systems only; no 5V support, no ST/PBRST pins, and no dual-output architecture. | Choose only for 3.3V µP supervision where extended reset delay is needed and 5V compatibility is irrelevant. |
Compared with MAX6326UT46D3+ and TPS3808G33DBVR, the MAX1232CWE+T uniquely combines 5V operation, dual RST outputs, selectable voltage tolerance, configurable watchdog, and debounced manual reset in a single 16-pin SO package - making it irreplaceable for legacy 5V μP systems requiring full supervision capability.
Availability
MAX1232CWE+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, communications baseband processors, and smart energy meters requiring stable component supply across extended production lifecycles.
Supply support for MAX1232CWE+T 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, computing, and communications applications.
The MAX1232CWE+T belongs to Maxim's microprocessor supervisory product line, engineered specifically for robust 5V system power monitoring, watchdog-based software recovery, and deterministic reset generation in cost-sensitive embedded applications.
FAQ
What is the function of the TOL pin on the MAX1232CWE+T?
The TOL pin on the MAX1232CWE+T selects the VCC reset threshold tolerance: connecting TOL to GND sets a 5% trip point (typically +4.62V), while connecting TOL to VCC selects a 10% trip point (typically +4.37V). This digital selection eliminates external resistive networks and allows field-configurable brownout sensitivity without hardware change. The MAX1232CWE+T datasheet confirms these thresholds are guaranteed across 0°C to +70°C.
Does the MAX1232CWE+T require external components for basic operation?
No, the MAX1232CWE+T requires no external components for core supervision functionality. Its voltage detector, watchdog timer, and debounced manual reset operate autonomously. A 0.1µF ceramic capacitor is recommended at the VCC pin for local decoupling, but no timing resistors, capacitors, or pull-up resistors are needed for RST, RST, or PBRST. This integration reduces BOM count and PCB area - a key advantage confirmed in the MAX1232CWE+T typical operating circuit.
How does the watchdog timer on the MAX1232CWE+T respond to software failure?
The MAX1232CWE+T watchdog timer monitors the ST pin and triggers reset if no falling edge occurs within the selected timeout (150ms/600ms/1.2s). Upon timeout, both RST and RST outputs activate for ≥250ms, forcing the microprocessor into power-up initialization. The MAX1232CWE+T continues issuing pulses every timeout interval until ST resumes toggling - providing continuous fault containment. This behavior is explicitly defined in the "Watchdog Timer" section of the MAX1232CWE+T datasheet.
What is the difference between RST and RST outputs on the MAX1232CWE+T?
RST is an active-high push-pull output capable of sourcing and sinking up to ±12mA, while RST is an active-low open-drain output rated for 10mA sink current and requiring an external pull-up resistor. This dual-output architecture allows the MAX1232CWE+T to interface directly with μPs that accept either reset polarity or require level translation. The distinction is documented in the MAX1232CWE+T Pin Description table and confirmed in the "Detailed Description" section.
Can the MAX1232CWE+T be used in automotive applications?
No, the MAX1232CWE+T is rated for 0°C to +70°C operation (C-grade) and is not qualified for automotive temperature ranges (−40°C to +125°C). While its functional block diagram matches some automotive supervisory needs, the MAX1232CWE+T lacks AEC-Q100 qualification, extended temperature testing, and automotive-specific reliability data. For automotive use, engineers should consider the MAX1232EWE (−40°C to +85°C) or other AEC-Q100–qualified alternatives instead of the MAX1232CWE+T.
MAX1232CWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.37V, 4.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- 250ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX1232CWE+T FAQ
1.How can I place an order for MAX1232CWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1232CWE+T 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 MAX1232CWE+T reliable?
The price and inventory of MAX1232CWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1232CWE+T is usually 5 days.
3.What payment methods are accepted for MAX1232CWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1232CWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1232CWE+T?
MAX1232CWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1232CWE+T 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 MAX1232CWE+T?
For technical support, including MAX1232CWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1232CWE+T requirements.
6.How does Aetrix verify that MAX1232CWE+T is sourced from the original manufacturer or authorized distributors?
All MAX1232CWE+T 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 MAX1232CWE+T meets industry standards.
7.What is the process for return or replacement of MAX1232CWE+T?
All MAX1232CWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1232CWE+T, 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 MAX1232CWE+T part is unused and in its original packaging.
Return procedure for MAX1232CWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1232CWE+T 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…
