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Diodes Incorporated PT7M6243CLTA3E
- Part No.:
- PT7M6243CLTA3E
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PT7M6243CLTA3E.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
PT7M6243CLTA3E from Diodes Incorporated is a precision N-channel open-drain voltage detector with 4.3V threshold (VTH+), ±1.5% accuracy at 25°C, 1.0μA supply current at 3.6V, and 20μs propagation delay on VCC rise. It monitors power rails in battery-powered microcontrollers and portable electronics to trigger reset or warning signals when supply drops below 4.3V.
For engineers reviewing the PT7M6243CLTA3E datasheet, PT7M6243CLTA3E pinout, PT7M6243CLTA3E application, or PT7M6243CLTA3E equivalent, key selection criteria include threshold accuracy over temperature, ultra-low quiescent current, open-drain output compatibility with 1.2–5.5V supply range, and SOT23-3 package suitability for space-constrained designs.
Technical Context
The PT7M6243CLTA3E implements a precision bandgap reference and comparator with internally trimmed resistor networks to set a fixed 4.3V detection threshold (VTH+), where VTH− = VTH+ / 1.045 and hysteresis is 5% typical. Its internal 5% hysteresis prevents output oscillation during slow VCC transitions.
It operates across 1.2V–5.5V supply range with guaranteed functionality from −40°C to +85°C, delivering ±2.5% total threshold variation over temperature and 1.0μA typical ICC at 3.6V - enabling direct integration into low-power wake-up and brown-out detection circuits without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold (VTH+) | 4.3V ±1.5% at 25°C; defines exact supply voltage at which RST asserts on rising VCC |
| Hysteresis | 5% typical; ensures stable reset release by requiring VCC to rise ≥4.3V × 1.05 before deassertion |
| Supply Current (ICC) | 1.0μA @ 3.6V; enables multi-year operation on coin-cell batteries in always-on monitoring |
| Propagation Delay | 20μs typical on VCC rise; supports fast system response to overvoltage/undervoltage events |
| Operating Voltage Range | 1.2V to 5.5V; allows use with Li-ion, alkaline, and regulated 3.3V/5V rails without external regulators |
| Output Configuration | N-channel open-drain; permits wired-OR reset bus sharing and flexible pull-up voltage selection |
| Temperature Range | −40°C to +85°C; qualified for industrial and automotive cabin applications |
Pinout & Package
PT7M6243CLTA3E is housed in a 3-pin SOT23 (TA3) surface-mount package with gull-wing leads, footprint-compatible with JEDEC TO-236AB, and rated for 320mW power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Accepts 1.2–5.5V; powers internal bandgap and comparator; must be decoupled with ≥0.1μF capacitor |
| GND | Ground reference | Return path for supply and internal circuitry; requires low-impedance connection to system ground plane |
| RST | Active-low open-drain reset output | Drives low when VCC < VTH− (≈4.09V); requires external pull-up to define logic-high level and sink capability |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold with factory trimming | 4.3V VTH+ set via laser-trimmed resistors; eliminates need for external calibration components |
| Ultra-low static current | 1.0μA typical ICC at 3.6V; reduces standby power loss in battery-backed systems by >95% vs. discrete solutions |
| Guaranteed hysteresis | 3–6% hysteresis range; prevents chatter during noisy or slowly ramping supply conditions |
| Wide supply compatibility | Operates down to 1.2V VCC; supports direct interface with sub-1.8V logic domains and energy-harvesting sources |
| Open-drain output architecture | Enables multi-source reset bus wiring and independent selection of pull-up voltage (e.g., 1.8V, 3.3V, or 5V) |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors Li-SOCl₂ primary cell voltage during deep-sleep cycles to prevent data corruption from undervoltage writes. IC Role / Device Role / Timing Role: Voltage detector providing active-low reset signal to MCU upon VCC drop below 4.3V. Use Value: 1.0μA ICC extends 10-year battery life; ±1.5% threshold accuracy ensures reliable brown-out detection before flash write failure. |
Use Scenario: Supervises 5V backplane rail in modular I/O chassis to halt analog input sampling if supply sags during transient load switching. IC Role / Device Role / Timing Role: System-level voltage supervisor asserting RST to FPGA configuration controller within 20μs of fault onset. Use Value: 20μs propagation delay meets IEC 61000-4-4 EFT immunity timing constraints; −40°C to +85°C rating ensures field reliability. |
| Medical Wearable ECG Patch | Automotive Body Control Module (BCM) |
|
Use Scenario: Detects depletion of 3.7V Li-ion battery in disposable patch to disable RF transmission and log final diagnostics before shutdown. IC Role / Device Role / Timing Role: Low-power voltage monitor interfacing directly with 3.3V ADC reference and BLE SoC reset pin. Use Value: SOT23-3 footprint minimizes PCB area; 1.2V minimum VCC allows operation during final battery discharge phase. |
Use Scenario: Validates 5V domain stability after ignition sequence in BCM microcontroller subsystem before enabling CAN transceiver and driver ICs. IC Role / Device Role / Timing Role: Power-on reset generator with hysteresis ensuring clean initialization after cold crank voltage recovery. Use Value: ±2.5% threshold tolerance over −40°C to +85°C guarantees consistent behavior across engine bay thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBZR | 2.93V fixed threshold; ±2% accuracy; 0.5μA ICC; SOT23-3 | Lower threshold unsuitable for 4.3V rail supervision; better for 3.3V logic monitoring | Select only if target supply is ≤3.0V and sub-1μA current is critical |
| APX803S-43SA-7 | 4.3V threshold; ±2.5% accuracy; 1.5μA ICC; push-pull active-low output; SOT23-3 | No external pull-up required but lacks wired-OR capability; higher ICC increases standby load | Choose when board layout prohibits external pull-up or when driving high-capacitance reset lines directly |
Compared with TLV803EB29DBZR and APX803S-43SA-7, PT7M6243CLTA3E uniquely balances 4.3V precision, ultra-low 1.0μA ICC, and open-drain flexibility - making it optimal for battery-critical, multi-rail, or shared-reset architectures where power and routing efficiency are prioritized.
Availability
PT7M6243CLTA3E is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, industrial PLC I/O modules, and medical wearable ECG patches requiring stable component supply with guaranteed long-term manufacturability.
Supply support for PT7M6243CLTA3E 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The PT7M62xx series was designed specifically for ultra-low-power voltage monitoring in portable and energy-constrained systems, emphasizing precision threshold stability, minimal quiescent current, and seamless integration into compact PCB layouts.
FAQ
What is the exact detection threshold voltage and its tolerance for PT7M6243CLTA3E?
The PT7M6243CLTA3E has a nominal detection threshold (VTH+) of 4.3V, with ±1.5% accuracy at 25°C and ±2.5% over the full −40°C to +85°C operating range. The hysteresis is 5% typical, meaning VTH− ≈ 4.09V, ensuring clean reset assertion and release without chatter during slow supply transitions.
Can PT7M6243CLTA3E operate from a 1.8V supply rail?
Yes - PT7M6243CLTA3E operates across 1.2V to 5.5V, so it functions correctly at 1.8V. At this voltage, the internal bandgap reference and comparator remain fully functional, and the RST output retains valid logic levels per datasheet VOH/VOL specs, though pull-up voltage must be selected accordingly for proper interfacing.
Is an external capacitor required on the VCC pin?
Yes - the datasheet specifies a minimum 0.1μF ceramic capacitor between VCC and GND, placed as close as possible to the device pins. This stabilizes the internal reference and prevents false triggering due to supply noise or transient droop during load switching.
Does PT7M6243CLTA3E support reset timeout functionality?
No - PT7M6243CLTA3E is a simple voltage detector without built-in reset timeout. It asserts RST immediately when VCC falls below VTH− and releases it when VCC rises above VTH+. For timed reset hold, an external RC network or dedicated reset timer IC (e.g., MAX809) must be added in series.
PT7M6243CLTA3E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 200µs Maximum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
PT7M6243CLTA3E FAQ
1.How can I place an order for PT7M6243CLTA3E through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M6243CLTA3E 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 PT7M6243CLTA3E reliable?
The price and inventory of PT7M6243CLTA3E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M6243CLTA3E is usually 5 days.
3.What payment methods are accepted for PT7M6243CLTA3E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M6243CLTA3E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M6243CLTA3E?
PT7M6243CLTA3E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M6243CLTA3E 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 PT7M6243CLTA3E?
For technical support, including PT7M6243CLTA3E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M6243CLTA3E requirements.
6.How does Aetrix verify that PT7M6243CLTA3E is sourced from the original manufacturer or authorized distributors?
All PT7M6243CLTA3E 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 PT7M6243CLTA3E meets industry standards.
7.What is the process for return or replacement of PT7M6243CLTA3E?
All PT7M6243CLTA3E units undergo pre-shipment inspection (PSI). If there is an issue with PT7M6243CLTA3E, 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 PT7M6243CLTA3E part is unused and in its original packaging.
Return procedure for PT7M6243CLTA3E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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