My Inquiry
My Account
STMicroelectronics STM6524AUABDL6F
- Part No.:
- STM6524AUABDL6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- 6-UFDFN
- Datasheet:
-
STM6524AUABDL6F.pdf
- Description:
- IC SUPERVISOR SMART RESET 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,909
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM6524AUABDL6F from STMicroelectronics is a 6-pin Smart Reset™ supervisor IC with dual active-low push-button inputs (SR0, SR1), factory-programmed 10 s Smart Reset™ setup delay (tSRC), and fixed 360 ms reset pulse duration (tREC). It operates from 1.65 V to 5.5 V, draws only 1.5 µA typical supply current, and delivers open-drain active-low RST output with internal 50 kΩ pull-up resistor in UDFN6 (1.6 mm × 1.3 mm) package. Used in portable consumer electronics requiring robust, glitch-immune delayed reset control.
For engineers reviewing the STM6524AUABDL6F datasheet, STM6524AUABDL6F pinout, STM6524AUABDL6F application, or STM6524AUABDL6F equivalent, this page provides verified technical context, exact pin functions, real-world timing behavior (tSRC = 10 s typ., tREC = 360 ms typ.), package footprint details, and validated alternative options for dual-button delayed reset systems.
Technical Context
The STM6524AUABDL6F implements dual-input synchronous Smart Reset™ logic: both SR0 and SR1 must be held low simultaneously for ≥10 s (tSRC) before asserting RST. Its reset output remains active for exactly 360 ms (tREC), independent of button release timing - a factory-programmed, non-volatile configuration confirmed by part number suffix "UAB" (tSRC=10 s, tREC=360 ms).
It features test mode entry via overvoltage on SR0 (VTEST = VCC + 0.9 to +1.4 V), triggering a shortened 21 ms tSRC-SHORT for rapid validation. Input glitch immunity equals tSRC when both inputs are asserted, and the device guarantees valid deasserted RST states down to VCC = 1.0 V after undervoltage detection below 1.575 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.65 V to 5.5 V - supports single-cell Li-ion, 3.3 V, and 5 V systems without level shifting. |
| Supply current (ICC) | 1.5 µA typ. at VCC = 5.0 V - enables multi-year battery life in always-on portable devices. |
| Smart Reset™ delay (tSRC) | 10 s typ. (factory-set) - prevents accidental resets from brief button presses; ±20% over -40 °C to +85 °C. |
| Reset pulse duration (tREC) | 360 ms typ. (factory-programmed) - ensures reliable processor reset without software dependency on button hold time. |
| Input logic levels | VIL ≤ 0.3 V, VIH ≥ 0.85 × VCC - compatible with 1.8 V, 3.3 V, and 5 V GPIOs without external translators. |
| Output type | Open-drain, active-low, with 50 kΩ internal pull-up - eliminates need for external resistor in most 3.3 V/5 V reset circuits. |
| Operating temperature | –40 °C to +85 °C - qualified for industrial-grade portable equipment operation. |
Pinout & Package
STM6524AUABDL6F uses the UDFN6 (1.6 mm × 1.3 mm, 0.4 mm pitch) package with wettable flanks, RoHS-compliant and halogen-free per ECOPACK®2. Pin 1 is marked by a dot; pin 4 is NC (not bonded, must connect to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VSS | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system ground plane. |
| 2 SR1 | Secondary Smart Reset™ input | Active-low push-button input with optional internal pull-up; requires simultaneous assertion with SR0 for reset initiation. |
| 3 RST | Reset output | Open-drain, active-low output with integrated 50 kΩ pull-up; drives microcontroller /RESET pin directly. |
| 4 NC | No connection | Not internally bonded; electrically isolated and must be tied to VSS for mechanical stability and thermal performance. |
| 5 SR0 | Primary Smart Reset™ input | Active-low push-button input with optional internal pull-up; also serves as test mode trigger when overvolted (>VCC + 0.9 V). |
| 6 VCC | Power supply | 1.65–5.5 V input; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronized Smart Reset™ inputs | SR0 and SR1 must both be held low ≥10 s to initiate reset - eliminates spurious resets from single-button bounce or ESD events. |
| Factory-programmed tREC | Fixed 360 ms reset pulse ensures full processor initialization regardless of user button release timing - no firmware coordination needed. |
| Integrated 50 kΩ pull-up on RST | Eliminates external resistor in standard 3.3 V/5 V reset networks, reducing BOM count and PCB area in space-constrained designs. |
| Test mode with feedback | Voltage-triggered (SR0 > VCC + 0.9 V) entry with visible RST pulsing - enables in-system validation without dedicated test equipment. |
| Glitch-immune timing architecture | tSRC-based input filtering (10 s typ.) rejects transients <10 s - critical for noisy handheld environments with mechanical switch contact bounce. |
Applications
| Smartphone Hard Reset Management | e-Reader System Recovery |
|---|---|
|
Use Scenario: User holds power + volume-down buttons for >10 s to force recovery when OS hangs. IC Role / Device Role / Timing Role: STM6524AUABDL6F monitors both buttons synchronously and asserts RST only after full 10 s delay, then holds it for 360 ms to guarantee SoC reset completion. Use Value: Prevents accidental reboots from brief presses while ensuring deterministic hardware-level recovery - no reliance on bootloader or firmware responsiveness. |
Use Scenario: E-reader freezes during firmware update; user initiates forced recovery via dual-button sequence. IC Role / Device Role / Timing Role: Acts as hardware-enforced reset arbiter: validates concurrent SR0/SR1 assertion, enforces 10 s tSRC, and delivers precise 360 ms tREC pulse to reset application processor. Use Value: Guarantees complete memory controller and flash interface reset before reboot - avoids corrupted update states or boot loops. |
| Portable GPS Navigation Recovery | MP3 Player Firmware Crash Recovery |
|
Use Scenario: Navigation device locks during map rendering; user triggers hard reset using dedicated recovery buttons. IC Role / Device Role / Timing Role: Provides fail-safe reset path independent of MCU state; tREC ensures GPS baseband and RF ICs fully reset before reinitialization. Use Value: Eliminates need for battery removal; maintains RTC and backup RAM integrity while guaranteeing full system restart within defined timing window. |
Use Scenario: MP3 player stops responding to controls; user performs long-press reset using play/pause + menu buttons. IC Role / Device Role / Timing Role: Dual-input Smart Reset™ logic interprets coordinated button press as intentional recovery command, not accidental keypress - triggers 360 ms RST pulse. Use Value: Enables consistent recovery across firmware versions without modifying application code - hardware-level reset policy enforcement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input delayed reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM6524ALABDL6F | tSRC = 6.0 s (typ.), same tREC = 360 ms, identical package and pinout | Suitable where shorter user-noticeable delay improves perceived responsiveness in less-critical recovery scenarios | Select when 6 s delay balances safety against usability - e.g., consumer audio devices with frequent soft resets. |
| STM6524APABDL6F | tSRC = 7.5 s (typ.), same tREC = 360 ms, identical package and pinout | Offers intermediate delay between 6 s and 10 s; retains same reset pulse fidelity and low-power profile | Choose for mid-tier portable devices needing stronger anti-glitch protection than 6 s but faster recovery than 10 s. |
Compared with STM6524AUABDL6F, the ALABDL6F and APABDL6F variants retain identical RST timing, power consumption, and package - differing only in factory-programmed tSRC (6 s and 7.5 s), enabling precise tailoring of user-facing reset latency without redesigning the reset network.
Availability
STM6524AUABDL6F is available at Aetrix Electronics and suitable for smartphone recovery systems, e-reader firmware restoration, portable navigation device hard resets, and MP3 player crash recovery requiring stable component supply across high-volume consumer production cycles.
Supply support for STM6524AUABDL6F 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog chips for automotive, industrial, and consumer markets.
The STM65xx Smart Reset™ family targets portable electronics requiring robust, user-initiated hardware reset with programmable delay and guaranteed pulse width - solving reliability gaps left by discrete RC networks or firmware-only solutions.
FAQ
What is the exact tSRC and tREC timing for STM6524AUABDL6F?
The STM6524AUABDL6F has a factory-programmed Smart Reset™ setup delay (tSRC) of 10.0 s (typical), with ±20% variation over –40 °C to +85 °C. Its reset timeout period (tREC) is fixed at 360 ms (typical), also factory-programmed and unaffected by ambient temperature or supply voltage changes within operating range.
Does STM6524AUABDL6F require external pull-up resistors on SR0/SR1 inputs?
No. The STM6524AUABDL6F does not include internal pull-up resistors on SR0 or SR1 inputs - external 10–100 kΩ pull-ups to VCC are required unless the host microcontroller provides them. This is confirmed by datasheet Table 1 and Figure 4/5 schematics, which explicitly show external pull-up placement.
Can the tREC duration be changed after manufacturing?
No. The tREC value of 360 ms is factory-programmed during wafer sort and permanently stored in non-volatile configuration memory. It cannot be altered in-system or via external signals - only selectable at order time via part number suffix (e.g., "AB" = 360 ms, "E" = 1.28 ms).
Is pin 4 (NC) safe to leave floating on the PCB?
No. Pin 4 is marked NC (not connected internally) but must be soldered to VSS per datasheet Section 2 and Figure 2. Leaving it floating risks mechanical instability, thermal stress concentration, and potential solder joint fracture in portable devices subject to vibration or flex - ST specifies connection to ground for reliability.
STM6524AUABDL6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Smart Reset™
- Package/Case:
- 6-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Reset Timer
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 240ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UDFN (1.6x1.3)
STM6524AUABDL6F FAQ
1.How can I place an order for STM6524AUABDL6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM6524AUABDL6F 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 STM6524AUABDL6F reliable?
The price and inventory of STM6524AUABDL6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM6524AUABDL6F is usually 5 days.
3.What payment methods are accepted for STM6524AUABDL6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM6524AUABDL6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM6524AUABDL6F?
STM6524AUABDL6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM6524AUABDL6F 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 STM6524AUABDL6F?
For technical support, including STM6524AUABDL6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM6524AUABDL6F requirements.
6.How does Aetrix verify that STM6524AUABDL6F is sourced from the original manufacturer or authorized distributors?
All STM6524AUABDL6F 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 STM6524AUABDL6F meets industry standards.
7.What is the process for return or replacement of STM6524AUABDL6F?
All STM6524AUABDL6F units undergo pre-shipment inspection (PSI). If there is an issue with STM6524AUABDL6F, 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 STM6524AUABDL6F part is unused and in its original packaging.
Return procedure for STM6524AUABDL6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM6524AUABDL6F 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…
