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Renesas HA16103FPJ-E
- Part No.:
- HA16103FPJ-E
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
HA16103FPJ-E.pdf
- Description:
- WATCHDOG TIMER
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Inventory:4,260
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Product details
Overview
HA16103FPJ-E from Renesas Electronics (formerly Hitachi) is a monolithic watchdog timer IC with integrated 5 V voltage regulator, power-on reset generator, and dual-threshold low-voltage monitoring (NMI/STBY). It delivers regulated 5 V output at up to 1 A, supports adjustable reset timing via external RC networks, and operates across 6–40 V supply for battery-powered microcomputer systems.
For engineers reviewing the HA16103FPJ-E datasheet, HA16103FPJ-E pinout, HA16103FPJ-E application, or HA16103FPJ-E equivalent, this device serves as a system supervisory IC in automotive body control modules, industrial PLC I/O units, and embedded telemetry terminals where reliable power sequencing, runaway detection, and brownout recovery are critical.
Technical Context
The HA16103FPJ-E integrates a bandpass-filter-based watchdog timer that detects P-RUN pulse frequency deviation using externally set Rf/Cf components, generating RES pulses when input deviates from nominal duty cycle or frequency. Its power-on reset circuit uses RR/CR to define tON (25–60 ms typ), while low-voltage protection employs two independent comparators - one triggering NMI at VOUT ≤ 4.60 V (±200 mV hysteresis), another asserting STBY at VOUT ≤ 3.20 V (±1.5 V hysteresis).
Regulation is achieved via an external PNP transistor controlled by VCONT and VOUT pins, enabling scalable current delivery beyond internal limits. Output voltage fine-tuning (4.70–5.30 V) is implemented through resistor divider on Voadj, while VNMIadj and VSTBYadj allow precise threshold calibration of fault-detection points without changing core component values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 6.0 V to 40 V - enables direct connection to 12 V/24 V automotive or industrial bus without pre-regulation |
| Regulated Output | 5.00 V ±2% at 0.5 A - stable reference for MCU core logic and peripherals |
| NMI Detection Threshold | 4.60 V ±0.20 V - triggers non-maskable interrupt before critical brownout, configurable via VNMIadj |
| STBY Detection Threshold | 3.20 V ±0.30 V - initiates microcontroller standby mode to preserve RAM and reduce leakage |
| Power-On Reset Time | 40 ms typ (Rf = RR = 180 kΩ) - ensures clean initialization after cold start or wake-up |
| Watchdog Timeout | 130 ms typ (Cf = 0.01 µF, Rf = 180 kΩ) - detects software hang by missing P-RUN pulses |
| Operating Temperature | –40°C to +85°C - qualified for under-hood and factory-floor environments |
Pinout & Package
HA16103FPJ-E is housed in a 20-pin FP-20DA SOP package (JEDEC MS-013AC, 12.6 mm × 5.5 mm × 2.2 mm), surface-mount compatible with standard reflow profiles and offering thermal resistance θj-a ≈ 180°C/W on 30% copper glass-epoxy board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 11, 20 | NC | No-connect pins - must remain unconnected per design; no internal function or tie requirement |
| 2 | P-RUN | Watchdog clock input - accepts TTL/CMOS-level periodic signal; failure to toggle within timeout asserts RES |
| 3, 4 | Rf / Cf | Bandpass filter tuning - sets minimum detectable pulse width (tmin = 0.11 × Rf × Cf) for runaway detection |
| 5, 6 | RR / CR | Power-on reset timing - defines tON delay (≈0.46 × VOUT × RR × CR) before RES deasserts |
| 7 | GND | Analog/digital ground reference - requires low-impedance connection to minimize false RES due to ground bounce |
| 8 | Voadj | Output voltage trim - adjusts VOUT from 4.70 V to 5.30 V via external resistor to GND |
| 9 | VOUT | Regulated 5 V output node - drives external PNP base (via VCONT) and supplies internal circuitry |
| 12 | VCONT | PNP transistor base driver - controls external pass transistor to scale output current beyond IC limits |
| 13 | VCC | Main supply input - accepts 6–40 V unregulated input; powers all internal blocks including regulators and comparators |
| 14 | CRES | Reset delay capacitor - sets tRES (200 µs typ with 2200 pF) between NMI assertion and RES activation |
| 15 | VNMIadj | NMI threshold adjust - configures VNMI detection level (4.35–4.85 V) via resistor divider to VOUT or GND |
| 16 | NMI | Open-collector NMI output - pulls low to request non-maskable interrupt on connected MCU's NMI pin |
| 17 | RES | Open-collector reset output - asserts active-low reset to MCU RES pin upon fault or power-on |
| 18 | VSTBYadj | STBY threshold adjust - sets VSTBY trip point (2.80–3.60 V) for standby-mode entry |
| 19 | STBY | Open-collector STBY output - signals MCU to enter low-power standby when VOUT drops below VSTBY |
Key Features
| Feature | Design Value |
|---|---|
| Dual-threshold voltage monitoring | Independent NMI (4.60 V) and STBY (3.20 V) detection with user-adjustable hysteresis prevents chatter during slow brownout transitions |
| Externally programmable reset timing | RR/CR network allows tON tuning from <10 ms to >100 ms - accommodates diverse MCU boot requirements |
| Adjustable watchdog sensitivity | Rf/Cf configuration enables precise rejection of noise spikes while detecting true software lockup (e.g., 10 Hz ±15% window) |
| Scalable 5 V regulation | VCONT/VOUT interface supports external PNP transistor - delivers >1 A load current without redesigning IC footprint |
| Fine-grained output voltage control | Voadj pin permits ±3% VOUT adjustment via single resistor - eliminates need for custom regulator variants |
Applications
| Automotive Body Control Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Microcontroller managing door locks, lighting, and window motors in 12 V vehicle electrical system. IC Role / Device Role / Timing Role: System supervisor providing power-on reset, brownout NMI, and watchdog timeout to prevent erratic actuator behavior. Use Value: Prevents unintended door unlock or headlight flicker during cranking (6–7 V dips) via 4.60 V NMI threshold and 200 µs CRES-delayed RES assertion. | Use Scenario: Remote I/O controller operating in factory environment with 24 V DC supply and variable EMI exposure. IC Role / Device Role / Timing Role: Fault monitor ensuring deterministic restart after transient overvoltage or software crash. Use Value: Guarantees safe shutdown and recovery via STBY signal at 3.20 V before EEPROM corruption occurs, with adjustable tON matching PLC firmware boot sequence. |
| Telematics Data Logger | Battery-Powered Sensor Hub |
Use Scenario: GPS/GSM module logging vehicle location data during intermittent ignition cycles. IC Role / Device Role / Timing Role: Power sequencer and watchdog enforcing clean boot after wake-up from deep sleep. Use Value: Uses P-RUN input to validate firmware execution loop; if missed for >130 ms, RES forces full reboot - eliminating silent data loss. | Use Scenario: Wireless environmental sensor node powered by Li-ion battery with 3.0–4.2 V discharge curve. IC Role / Device Role / Timing Role: Low-voltage protector extending operational life by initiating graceful shutdown before cutoff. Use Value: Configured with VNMIadj to trigger NMI at 3.6 V and VSTBYadj to assert STBY at 3.2 V - preserving flash write integrity and RTC timekeeping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar watchdog timer with voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US31D3+ | Fixed 3.08 V reset threshold; no adjustable NMI/STBY thresholds or external PNP support | Suitable only for 3.3 V systems requiring simple reset, not dual-threshold brownout management | Select when board space is constrained and only basic reset is needed - lacks HA16103FPJ-E's programmability and current scalability |
| TPS3823-33DBVR | 3.3 V fixed output; no watchdog timer; single-reset threshold (2.93 V); no external transistor drive | Designed for low-power 3.3 V MCUs without runtime supervision needs | Choose for cost-sensitive 3.3 V designs where watchdog functionality is handled separately - HA16103FPJ-E provides integrated regulation + watchdog + dual monitoring |
Compared with MAX6326US31D3+ and TPS3823-33DBVR, HA16103FPJ-E uniquely combines wide-input regulation (6–40 V), field-adjustable dual-voltage monitoring, and external PNP drive capability - making it the only option among the three suitable for 12/24 V automotive or industrial systems requiring coordinated NMI/STBY/RES signaling and >500 mA load current.
Availability
HA16103FPJ-E is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC I/O modules, and battery-powered telematics terminals requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for HA16103FPJ-E 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.
The HA16103FPJ-E belongs to Renesas' legacy Hitachi analog supervisory IC portfolio, engineered specifically for robust microcomputer system supervision in harsh environments where voltage transients, thermal stress, and software reliability are primary concerns.
FAQ
What is the maximum load current supported by HA16103FPJ-E?
The HA16103FPJ-E itself does not source output current directly. Instead, it drives an external PNP transistor via the VCONT pin to deliver regulated 5 V. With appropriate transistor selection (e.g., 2SB857D), HA16103FPJ-E enables >1 A output current while maintaining tight regulation and thermal safety. Internal circuitry draws only ~8 mA typical supply current.
Can HA16103FPJ-E operate from a 24 V supply?
Yes, HA16103FPJ-E supports an input voltage range of 6 V to 40 V, making it fully compatible with 24 V industrial and commercial power rails. Its internal regulator and protection circuits are designed to handle this range without derating, provided thermal design meets θj-a requirements per the FP-20DA package data.
How do I configure HA16103FPJ-E for a 3.3 V microcontroller reset threshold?
HA16103FPJ-E does not provide a 3.3 V reset threshold natively. Its NMI and STBY thresholds are referenced to VOUT (5 V) and adjustable down to ~3.2 V minimum. For true 3.3 V systems, use external resistor dividers on VNMIadj/VSTBYadj to scale detection points - e.g., setting VNMI = 3.3 V requires recalculating R2/R3 per the formula in the datasheet, confirmed with HA16103FPJ-E's internal reference.
Is HA16103FPJ-E pin-compatible with HA16103FPK?
Yes, HA16103FPJ-E and HA16103FPK share identical FP-20DA pinout and electrical functionality. The difference lies solely in temperature rating: HA16103FPJ-E is rated for –40°C to +85°C, while HA16103FPK extends to +125°C ambient. No PCB layout changes are required when substituting between them in designs operating within the FPJ-E range.
Does HA16103FPJ-E require external capacitors for stability?
Yes, HA16103FPJ-E requires multiple external capacitors: a 100 µF bulk capacitor on VOUT (C1), 1000 pF on VCONT, and 2200 pF on CRES for reset delay timing. Additionally, Cf and Rf form the watchdog filter, while RR and CR set power-on reset duration. Omitting any of these compromises regulation stability, reset accuracy, or watchdog sensitivity - all values are validated in the official test circuit.
HA16103FPJ-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- -
- Number of Outputs:
- -
- Ratio - Input:Output:
- -
- Output Configuration:
- -
- Output Type:
- -
- Interface:
- -
- Voltage - Load:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Current - Output (Max):
- -
- Rds On (Typ):
- -
- Input Type:
- -
- Features:
- -
- Fault Protection:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HA16103FPJ-E FAQ
1.How can I place an order for HA16103FPJ-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HA16103FPJ-E 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 HA16103FPJ-E reliable?
The price and inventory of HA16103FPJ-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HA16103FPJ-E is usually 5 days.
3.What payment methods are accepted for HA16103FPJ-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HA16103FPJ-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HA16103FPJ-E?
HA16103FPJ-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HA16103FPJ-E 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 HA16103FPJ-E?
For technical support, including HA16103FPJ-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HA16103FPJ-E requirements.
6.How does Aetrix verify that HA16103FPJ-E is sourced from the original manufacturer or authorized distributors?
All HA16103FPJ-E 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 HA16103FPJ-E meets industry standards.
7.What is the process for return or replacement of HA16103FPJ-E?
All HA16103FPJ-E units undergo pre-shipment inspection (PSI). If there is an issue with HA16103FPJ-E, 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 HA16103FPJ-E part is unused and in its original packaging.
Return procedure for HA16103FPJ-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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