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Diodes Incorporated PT7M7809ZTEX-1507
- Part No.:
- PT7M7809ZTEX-1507
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PT7M7809ZTEX-1507.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,050
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Product details
Overview
PT7M7809ZTEX-1507 from Diodes Incorporated is a precision microprocessor supervisory IC with 2.32V reset threshold (Z suffix), push-pull active-low RESET output, 200ms reset pulse width, and guaranteed operation down to VCC = 1.0V. It monitors supply voltage during power-up, brownout, and power-down in embedded μP systems and supports manual reset via debounced CMOS-compatible MR input.
For engineers reviewing the PT7M7809ZTEX-1507 datasheet, PT7M7809ZTEX-1507 pinout, PT7M7809ZTEX-1507 application, or PT7M7809ZTEX-1507 equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +85°C), low ICC (10–30µA), SOT23-3 package compatibility, and absence of watchdog or manual-reset logic in this variant.
Technical Context
The PT7M7809ZTEX-1507 implements a precision bandgap-based voltage monitor with hysteresis (VRTH = 4mV for Z-grade) and an internal timebase that guarantees a 200ms (min 140ms, max 400ms) reset assertion after VCC rises above VRST = 2.32V. Its push-pull RESET output drives low to ≤0.4V at 3.2mA sink current and remains valid across full operating temperature (−40°C to +85°C).
No watchdog timer or manual-reset input functionality is integrated - per Function Comparison Table, PT7M7809 lacks WDI and MR pins. The device operates from 1.0V to 5.5V supply and delivers rail-to-rail RESET timing integrity without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±2.5% (−40°C to +85°C); ensures reliable brownout detection at 2.32V nominal supply level |
| Reset Pulse Width | 200ms typ (140–400ms range); provides sufficient hold time for μP initialization after power stabilization |
| Supply Voltage Range | 1.0V to 5.5V; enables use in ultra-low-voltage systems and guarantees RESET validity down to 1.0V |
| Quiescent Current | 10–30µA at 5V; minimizes standby power impact in battery-backed or energy-sensitive applications |
| RESET Output Type | Push-pull active-low; eliminates need for external pull-up resistor and supports direct μP reset input drive |
| Output Sink Capability | 3.2mA @ VCC ≥4.5V, VOL ≤0.4V; ensures robust noise immunity and fast transition into reset state |
| Operating Temperature | −40°C to +85°C; qualified for industrial-grade embedded and networking equipment environments |
Pinout & Package
PT7M7809ZTEX-1507 is housed in a 3-pin SOT23 plastic package (Package Code T), with pin 1 = VCC, pin 2 = GND, pin 3 = RESET. No MR or WDI pins are present - consistent with PT7M7809's simplified supervision function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Monitored supply rail; RESET asserts when VCC falls below 2.32V and remains asserted until VCC exceeds threshold + 200ms |
| GND | Ground reference | Common return path for all internal circuitry and RESET output; required for accurate threshold sensing |
| RESET | Active-low push-pull output | Drives μP reset pin directly; sinks up to 3.2mA; transitions low within 250ns of VCC crossing VRST |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.32V threshold | ±2.5% tolerance over full temperature range ensures deterministic reset behavior in industrial environments |
| Guaranteed 1.0V operation | RESET remains functional and valid even as VCC drops to 1.0V - critical for last-gasp system shutdown sequencing |
| 200ms reset timeout | Internally timed, no external capacitor required; eliminates BOM cost and layout sensitivity |
| Push-pull RESET output | Eliminates need for external pull-up resistor and reduces PCB footprint vs. open-drain alternatives |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; contains <900ppm Br+Cl and <1000ppm Sb - meets automotive green requirements |
Applications
| Industrial PLC Controller | Network Router Power Management |
|---|---|
Use Scenario: Power supply monitoring during cold start and brownout events in programmable logic controllers. IC Role / Device Role / Timing Role: Precision voltage supervisor asserting reset to halt CPU execution until stable 3.3V rail is confirmed. Use Value: Prevents corrupted firmware execution by guaranteeing 200ms reset hold time after VCC crosses 2.32V threshold. | Use Scenario: Ensuring clean boot sequence for multi-rail switch-mode power supplies in enterprise routers. IC Role / Device Role / Timing Role: Monitors primary 3.3V domain and forces system-wide reset if voltage sags below 2.32V during transient load steps. Use Value: Push-pull RESET output drives multiple downstream reset inputs without signal degradation or timing skew. |
| Embedded Security Module | Server Baseboard Management |
Use Scenario: Secure boot enforcement in tamper-resistant cryptographic modules powered from backup coin-cell sources. IC Role / Device Role / Timing Role: Supervises low-voltage (2.32V) backup rail and asserts reset before VCC drops below safe operating margin. Use Value: Guaranteed RESET validity at VCC = 1.0V enables last-chance secure shutdown and nonvolatile state capture. | Use Scenario: BMC (Baseboard Management Controller) power sequencing in 1U rack servers with distributed 12V/5V/3.3V rails. IC Role / Device Role / Timing Role: Dedicated supervisor for 3.3V management controller supply, independent of main CPU reset chain. Use Value: Low 10–30µA quiescent current minimizes standby power draw on always-on BMC subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S-23SA-7 | 2.32V threshold, SOT23-3, push-pull RESET, but includes manual reset (MR) pin and higher ICC (40µA) | Supports user-initiated reset via external button; not drop-in due to extra MR pin and different pinout | Select only if manual reset capability is required and board layout allows MR routing |
| TPS3809K23DBVR | 2.32V threshold, SOT23-3, open-drain RESET, 1.6µA ICC, but requires external pull-up and lacks 1.0V operation guarantee | Ultra-low-power use case; incompatible RESET drive strength and timing behavior below 1.8V | Choose only for battery-critical applications where 1.6µA ICC outweighs loss of guaranteed 1.0V RESET validity |
Compared with APX809S-23SA-7 and TPS3809K23DBVR, PT7M7809ZTEX-1507 uniquely balances low ICC, guaranteed 1.0V operation, and push-pull drive - making it optimal for industrial μP systems needing deterministic reset without manual intervention or external components.
Availability
PT7M7809ZTEX-1507 is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, and embedded security modules requiring stable component supply and long-term production continuity.
Supply support for PT7M7809ZTEX-1507 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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.
PT7M7809ZTEX-1507 belongs to the PT7M78xx μP supervisor family, designed specifically to reduce component count and improve power-supply reliability in microprocessor-based systems through precision voltage monitoring and deterministic reset timing.
FAQ
What is the exact reset threshold voltage and tolerance for PT7M7809ZTEX-1507?
The PT7M7809ZTEX-1507 has a nominal reset threshold of 2.32V (Z suffix), with ±2.5% tolerance over the full operating temperature range (−40°C to +85°C). This is verified in the DC Electrical Characteristics table under VRST specification, and applies to both rising- and falling-edge detection with 4mV hysteresis (VRTH).
Does PT7M7809ZTEX-1507 support manual reset or watchdog functionality?
No - PT7M7809ZTEX-1507 does not include manual reset (MR) or watchdog input (WDI) pins. Per the Function Comparison Table and Pin Description section, only VCC, GND, and RESET pins are present. This distinguishes it from PT7M7811, PT7M7823, and other variants with extended feature sets.
What package type and pin configuration does PT7M7809ZTEX-1507 use?
PT7M7809ZTEX-1507 uses a 3-pin SOT23 (Package Code T) package: Pin 1 = VCC, Pin 2 = GND, Pin 3 = RESET. This matches the mechanical drawings and Ordering Information table, and is confirmed by the "T" suffix in the part number and "3-Pin, Small Outline Transistor Plastic (SOT23)" description.
Is PT7M7809ZTEX-1507 suitable for automotive applications?
PT7M7809ZTEX-1507 is not AEC-Q100 qualified. While Diodes offers automotive-grade versions of related parts (e.g., APX809S series), the PT7M78xx family documentation explicitly states that automotive qualification requires contacting Diodes directly for PPAP-capable, IATF 16949-manufactured parts - and no AEC status is listed for PT7M7809ZTEX-1507 in the datasheet or ordering table.
PT7M7809ZTEX-1507 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
PT7M7809ZTEX-1507 FAQ
1.How can I place an order for PT7M7809ZTEX-1507 through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M7809ZTEX-1507 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 PT7M7809ZTEX-1507 reliable?
The price and inventory of PT7M7809ZTEX-1507 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M7809ZTEX-1507 is usually 5 days.
3.What payment methods are accepted for PT7M7809ZTEX-1507?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M7809ZTEX-1507 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M7809ZTEX-1507?
PT7M7809ZTEX-1507 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M7809ZTEX-1507 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 PT7M7809ZTEX-1507?
For technical support, including PT7M7809ZTEX-1507 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M7809ZTEX-1507 requirements.
6.How does Aetrix verify that PT7M7809ZTEX-1507 is sourced from the original manufacturer or authorized distributors?
All PT7M7809ZTEX-1507 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 PT7M7809ZTEX-1507 meets industry standards.
7.What is the process for return or replacement of PT7M7809ZTEX-1507?
All PT7M7809ZTEX-1507 units undergo pre-shipment inspection (PSI). If there is an issue with PT7M7809ZTEX-1507, 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 PT7M7809ZTEX-1507 part is unused and in its original packaging.
Return procedure for PT7M7809ZTEX-1507:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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