My Inquiry
My Account
Diodes Incorporated AH173-PG-B-B
- Part No.:
- AH173-PG-B-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH173-PG-B-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH173-PG-B-B from Diodes Incorporated is a bipolar Hall effect latch sensor with integrated pullup resistor, designed for high-temperature rotor position sensing and RPM detection in 3-phase BLDC motor control. It operates from 3V to 20V, delivers 25mA sink current, features ±15–60 Gauss magnetic operate/release points (Grade A), and is rated for –40°C to +125°C ambient operation in SIP-3 (Bulk Pack) package.
For engineers reviewing the AH173-PG-B-B datasheet, AH173-PG-B-B pinout, AH173-PG-B-B application, or AH173-PG-B-B equivalent, key selection criteria include magnetic hysteresis (80 Gauss), output saturation voltage (≤400 mV at 10mA), internal 7–13 kΩ pullup, supply current (3.5–6 mA), and SIP-3 thermal derating profile up to 125°C.
Technical Context
The AH173-PG-B-B implements a fully integrated Hall latch architecture: on-chip Hall generator detects magnetic flux polarity, amplifier conditions the signal, comparator with built-in hysteresis rejects noise, and open-drain output stage includes a monolithic 7–13 kΩ pullup resistor. Its bandgap-regulated internal supply enables stable operation across 3–20 V.
Magnetic switching is bipolar: South-pole activation pulls OUT low (Bop = 15–60 G), and output remains latched until reversed field falls below Brp (–60 to –15 G). The device exhibits no external biasing requirement and supports direct interface with microcontroller GPIO or logic-level drivers without external pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3 V to 20 V - Enables direct connection to automotive battery rails or industrial 12/24 V systems without regulation. |
| Output Sink Current | 25 mA - Drives standard logic inputs, optocouplers, or small relays directly without external buffer. |
| Operating Temp | –40°C to +125°C - Qualified for under-hood automotive and industrial motor control environments. |
| Magnetic Hysteresis | 80 Gauss - Ensures robust noise immunity in electrically noisy motor drive applications. |
| Internal Pullup | 7–13 kΩ - Eliminates need for external pullup resistor; sets logic-high level when output is off. |
| Output Saturation | ≤400 mV at 10 mA - Guarantees clean TTL/CMOS-compatible low-state even under load. |
| Supply Current | 3.5–6 mA (off-state) - Low quiescent draw suitable for always-on sensing nodes. |
Pinout & Package
The AH173-PG-B-B is supplied in SIP-3 (Straight Lead, Bulk Pack) package - a 3-pin single-inline package with 2.51–2.57 mm height, 14.0–15.0 mm body length, and 0.63–0.84 mm lead pitch. Pin 1 is Vcc, Pin 2 is GND, Pin 3 is open-drain OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc (Pin 1) | Positive power supply input | Accepts 3–20 V DC; powers internal regulator, Hall element, and output driver. |
| GND (Pin 2) | Ground reference | Common return path for Hall sensing circuitry and output stage; must be low-impedance. |
| OUT (Pin 3) | Open-drain digital output | Sinks up to 25 mA when active; pulled high internally via 7–13 kΩ resistor when inactive. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | Switches ON with South pole (Bop ≥15 G), latches until reverse field drops below Brp (≤–15 G) - enables direction-agnostic position sensing. |
| Integrated pullup resistor | Monolithic 7–13 kΩ resistor eliminates external component count and PCB footprint in GPIO interface designs. |
| Wide supply range | 3–20 V operation accommodates unregulated 12 V automotive rails and industrial 24 V systems without LDO. |
| High-temp reliability | Specified performance from –40°C to +125°C ambient ensures stability in engine bay or enclosed motor housing. |
| RoHS/Green compliance | Fully lead-free, halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets global environmental mandates. |
Applications
| 3-Phase BLDC Motor Rotor Position Sensing | Automotive Fan Speed Monitoring |
|---|---|
|
Use Scenario: Detecting rotor magnet polarity in real time to commutate stator windings in brushless DC motors. IC Role / Device Role / Timing Role: Digital Hall latch providing synchronized edge-triggered signals to motor controller logic. Use Value: 80 Gauss hysteresis prevents chatter during low-speed rotation; SIP-3 package withstands vibration and thermal cycling near motor windings. |
Use Scenario: Measuring fan blade passage frequency to derive RPM in HVAC or engine cooling systems. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating pulse train proportional to rotational speed. Use Value: 25 mA sink current drives optocoupler input directly; –40°C to +125°C rating covers full under-hood temperature range. |
| Industrial Conveyor Belt Direction Detection | Electric Power Tool RPM Feedback |
|
Use Scenario: Determining belt travel direction by detecting alternating North/South pole sequence on embedded magnets. IC Role / Device Role / Timing Role: Bipolar latch capturing magnetic polarity transitions to infer motion vector. Use Value: Internal pullup simplifies interface to PLC input modules; wide VCC range tolerates fluctuating 12 V supply in factory environments. |
Use Scenario: Providing closed-loop speed feedback to motor driver ICs in cordless drills and angle grinders. IC Role / Device Role / Timing Role: High-speed magnetic switch delivering precise timing edges for PWM-based speed regulation. Use Value: ≤400 mV output saturation ensures reliable logic-low recognition at MCU input pins even under battery droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3722A | Higher sensitivity (Bop: 5–35 G), lower ICC (2.5 mA), SC59/SIP-3 options, AEC-Q100 qualified | Designed for automotive-grade motor control with PPAP support and IATF 16949 manufacturing | Preferred for new automotive designs requiring qualification and extended magnetic range. |
| AH3724A | Wider hysteresis (120 G), higher Bop/Brp spread (10–100 G), same package options and qualification | Better suited for high-noise environments or coarse-position applications where wider switching margin is critical | Select when operating near strong EMI sources or where magnet alignment tolerance exceeds ±15 G. |
Compared with AH173-PG-B-B, AH3722A offers tighter magnetic thresholds and automotive qualification, while AH3724A provides enhanced noise immunity via doubled hysteresis - both eliminate the NRND status and extend design lifetime beyond AH173's end-of-life roadmap.
Availability
AH173-PG-B-B is available at Aetrix Electronics and suitable for 3-phase BLDC motor control, automotive fan speed monitoring, industrial conveyor direction detection, and electric power tool RPM feedback requiring stable component supply despite its NRND status.
Supply support for AH173-PG-B-B 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 components for automotive, industrial, and computing markets.
The AH173 belongs to Diodes' Hall-effect sensor product line, engineered specifically for contactless position and speed sensing in harsh thermal and electromagnetic environments - with emphasis on motor control and automotive subsystems.
FAQ
Is AH173-PG-B-B pin-compatible with AH3722A or AH3724A?
Yes - all three devices share identical SIP-3 and SC59 footprints and pin assignments (Vcc, GND, OUT). No PCB redesign is required when migrating from AH173-PG-B-B to either AH3722A or AH3724A, though layout review for thermal and EMI performance is recommended due to updated internal architecture.
What does "NRND" mean for AH173-PG-B-B, and can it still be sourced?
"NRND" (Not Recommended for New Designs) indicates Diodes has discontinued marketing AH173-PG-B-B for future projects, but existing inventory remains available through authorized channels like Aetrix Electronics. Production continues for legacy program support, with full datasheet compliance and traceable lot history maintained.
Does AH173-PG-B-B require an external pullup resistor?
No - AH173-PG-B-B integrates a monolithic 7–13 kΩ pullup resistor between Vcc and OUT. This eliminates the need for external components in standard logic-level interfacing, reducing BOM count and PCB area while ensuring consistent high-state voltage across temperature and supply variations.
Can AH173-PG-B-B operate reliably at 125°C ambient temperature?
Yes - AH173-PG-B-B is fully specified for continuous operation at +125°C ambient. Its SIP-3 (Bulk Pack) package delivers 550 mW power dissipation at 25°C, derating linearly to 110 mW at 125°C per the datasheet's thermal curve, which supports typical 3–6 mA supply current and <10 mA output loading in high-temp motor control applications.
AH173-PG-B-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 8mT Trip, -8mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3V ~ 20V
- Current - Supply (Max):
- 6mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Collector
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH173-PG-B-B FAQ
1.How can I place an order for AH173-PG-B-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH173-PG-B-B 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 AH173-PG-B-B reliable?
The price and inventory of AH173-PG-B-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH173-PG-B-B is usually 5 days.
3.What payment methods are accepted for AH173-PG-B-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH173-PG-B-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH173-PG-B-B?
AH173-PG-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH173-PG-B-B 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 AH173-PG-B-B?
For technical support, including AH173-PG-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH173-PG-B-B requirements.
6.How does Aetrix verify that AH173-PG-B-B is sourced from the original manufacturer or authorized distributors?
All AH173-PG-B-B 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 AH173-PG-B-B meets industry standards.
7.What is the process for return or replacement of AH173-PG-B-B?
All AH173-PG-B-B units undergo pre-shipment inspection (PSI). If there is an issue with AH173-PG-B-B, 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 AH173-PG-B-B part is unused and in its original packaging.
Return procedure for AH173-PG-B-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AH173-PG-B-B Tags
-
TCS40DLR,LF
Toshiba Semiconductor and Storage
-
DRV5032FBDBZR
Texas Instruments
-
DRV5032FADBZR
Texas Instruments
-
AH1912-FA-7
Diodes Incorporated
-
AH1913-W-7
Diodes Incorporated
-
AH1911-W-7
Diodes Incorporated
-
TLI49631MXTSA1
Infineon Technologies
-
SM453R
Honeywell Sensing and Productivity Solutions
-
MLX90248ESE-EBA-000-RE
Melexis Technologies NV
-
MLX92213ELD-AAA-000-RE
Melexis Technologies NV
-
TLE4913HTSA1
Infineon Technologies
-
US5781ESE-AAA-000-RE
Melexis Technologies NV
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
