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Asahi Kasei Microdevices/AKM AK4543VQ
- Part No.:
- AK4543VQ
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Category:
- CODECS
- Package:
- -
- Datasheet:
-
AK4543VQ.pdf
- Description:
- IC CODEC AUDIO AC'97 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,404
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Product details
Overview
AK4543VQ from Asahi Kasei is an AC'97 Rev 2.1–compliant 18-bit stereo audio codec designed for PC audio subsystems, featuring dual stereo outputs with independent volume control, mono output, four stereo analog inputs (LINE/CD/VIDEO/AUX), two MIC inputs, and 3D stereo enhancement. It operates at 48 kHz sampling rate with ≥90 dBA SNR for both ADC and DAC paths and supports primary/secondary codec configuration via ID0#/ID1# pins for multi-codec docking station applications.
For engineers reviewing the AK4543VQ datasheet, AK4543VQ pinout, AK4543VQ application, or AK4543VQ equivalent, this page delivers verified specifications including AC'97 interface timing, analog performance metrics (S/N, THD+N, full-scale voltage), power-down modes, EAPD support, and LQFP-48 package compatibility - all critical for PC98/PC99-compliant audio design validation and legacy system integration.
Technical Context
The AK4543VQ implements a fixed-rate AC'97 serial interface with BIT_CLK at 12.288 MHz and SYNC at 48 kHz, supporting time-division multiplexed (TDM) 20-bit slots for command/status/data transfer. Its dual-path analog section integrates 18-bit sigma-delta ADC/DAC converters with anti-aliasing filters (AFILTL/AFILTR), reference voltage generation (Vref, VRADDA), and programmable mixer gain (−34.5 dB to +12 dB).
Codec identity is dynamically assigned via strapping pins ID0# (Pin 45) and ID1# (Pin 46), enabling primary (ID=00) or secondary (ID=01/10/11) operation in multi-codec systems. Digital I/O levels are configurable via SEL_CMOS (Pin 48) for 3.3 V CMOS or 5 V TTL logic compatibility, and EAPD (Pin 47) provides external amplifier power-down control synchronized with AC'97 low-power mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC/DAC Resolution | 18-bit sigma-delta conversion - enables high-fidelity audio capture and playback meeting PC98/PC99 SNR requirements. |
| SNR (A-weighted) | ≥90 dBA for ADC and DAC - ensures clean signal path for line-level and microphone inputs in desktop/laptop audio. |
| Sampling Rate | Fixed 48 kHz - aligns with AC'97 standard frame timing and simplifies clock tree design using 24.576 MHz crystal. |
| Power Supply | Analog: 5.0 V ±5%; Digital: 3.3 V or 5.0 V - supports mixed-voltage PCB layouts with separate AVdd/DVdd domains. |
| Package | 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) - compact footprint compatible with AK4540/AK4542 layouts for drop-in upgrade. |
| Interface Standard | AC'97 Rev 2.1 compliant - guarantees interoperability with Intel AC'97 controllers and legacy BIOS/audio drivers. |
| Power Consumption | 200 mW (AVdd=5 V, DVdd=3.3 V, full operation) - suitable for thermally constrained laptop mainboards and add-in cards. |
Pinout & Package
AK4543VQ is housed in a 48-lead LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (not electrically connected). Pin assignments follow AC'97 Rev 2.1 signal naming conventions and include dedicated analog/digital ground separation (AVss1/AVss2, DVss1/DVss2), crystal oscillator inputs (XTL_IN/XTL_OUT), and codec ID configuration pins (ID0#, ID1#).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9, DVdd1/DVdd2 | Digital power supply | 3.3 V or 5.0 V digital rail; requires 0.1 µF + 4.7 µF decoupling to DVss. |
| 2, 3, XTL_IN/XTL_OUT | Master clock input/output | Accepts 24.576 MHz crystal; XTL_OUT open when external clock used. |
| 5, 8, SDATA_OUT/SDATA_IN | AC'97 bidirectional data | 256-bit serial stream; MSB-first, 2's complement format for PCM/control data. |
| 6, BIT_CLK | AC'97 bit clock | 12.288 MHz clock; output when Primary codec (ID=00), input when Secondary. |
| 10, SYNC | AC'97 frame sync | 48 kHz fixed-rate sync pulse marking start of each audio frame (Tag/Data phases). |
| 11, RESET# | Hardware reset | Active-low cold reset initializes registers, activates BIT_CLK, places analog outputs in Hi-Z except PC_BEEP. |
| 45, 46, ID0#/ID1# | Codec identity select | Strap pins defining primary (00) or secondary (01/10/11) role in multi-codec configurations. |
| 47, EAPD | External amplifier powerdown | Open-drain output driving external amplifier shutdown during AC'97 low-power mode. |
| 48, SEL_CMOS | I/O logic level select | CMOS (open) for 3.3 V DVdd; TTL (tied to GND) for 5 V DVdd - sets VIH/VIL thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| AC'97 Rev 2.1 compliance | Fully interoperable with Intel AC'97 controllers and legacy PC audio firmware without protocol translation. |
| Multiple codec capability | Configurable as Primary or Secondary via ID0#/ID1# pins - enables 4/6-speaker output and docking station audio expansion. |
| 3D Stereo Enhancement | On-chip processing with 27 nF external capacitor (Pin 32) - adds spatial perception without host CPU load. |
| EAPD support | Direct control of external power amplifier enable/disable - reduces system standby power by cutting amplifier bias current. |
| Direct PC_BEEP pass-through | Hardware routing of PC speaker signal to LINE_OUT_L/R - eliminates need for discrete buffer IC, lowering BOM cost. |
| Flexible power management | Per-block power-down (PR0–PR7 bits) - allows selective shutdown of unused analog paths (e.g., MIC, CD) to reduce quiescent current. |
Applications
| Desktop PC Audio Subsystem | Laptop Integrated Audio |
|---|---|
Use Scenario: Mainboard-integrated audio solution for Windows 98/2000-era desktops requiring PC98/PC99 certification. IC Role / Device Role / Timing Role: AC'97 codec handling all analog I/O (line/mic/CD), DAC/ADC conversion, and mixer functions under control of southbridge AC'97 controller. Use Value: Single-chip integration eliminates discrete op-amps and switches, reducing layout area and component count while meeting SNR >90 dBA. |
Use Scenario: Low-power audio subsystem in portable PCs where thermal and battery life constraints demand efficient analog circuitry. IC Role / Device Role / Timing Role: Primary codec providing stereo line-out, mono speakerphone output, and dual MIC inputs with EAPD-driven amplifier gating. Use Value: 200 mW full-operation power and per-block power-down modes extend battery runtime without sacrificing audio fidelity. |
| Docking Station Audio Expansion | Aftermarket Sound Card |
Use Scenario: Docking station adding 4/6-channel surround sound to ultraportable laptops via secondary AC'97 link. IC Role / Device Role / Timing Role: Secondary codec (ID=01/10/11) receiving playback data on Slot 6/7/8/9 and returning record data on Slot 3/4 - synchronized via shared SYNC/BIT_CLK. Use Value: Pin-compatible upgrade path from AK4540/AK4542 enables reuse of existing layout while adding multi-codec flexibility. |
Use Scenario: PCI-based add-in audio card targeting OEMs needing certified, cost-optimized AC'97 functionality. IC Role / Device Role / Timing Role: Standalone AC'97 codec interfacing directly with PCI-to-AC'97 bridge chip, managing all analog I/O and mixer routing. Use Value: LQFP-48 package and 48 kHz fixed sampling simplify PCB routing and eliminate need for complex clock synthesis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AC'97 audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4542VQ | Pin-compatible predecessor with identical LQFP-48 package and AC'97 interface; lacks 3D stereo enhancement and some register-level features of AK4543VQ. | Supports basic PC98 audio but not advanced multi-codec docking or 3D audio effects required in PC99 designs. | Choose AK4542VQ only for legacy replacement where software does not leverage AK4543VQ-specific registers or 3Dcap functionality. |
| STAC9750 | AC'97 Rev 2.1–compliant 18-bit codec in 48-pin TQFP; offers similar SNR (90 dBA) but uses different register map and lacks EAPD output. | Designed for STMicroelectronics' AC'97 controller ecosystems; requires driver adaptation due to non-Asahi Kasei register addressing. | Select STAC9750 when sourcing from STMicroelectronics-qualified supply chains or when EAPD control is not required in the target platform. |
Compared with AK4542VQ, AK4543VQ adds 3D stereo enhancement and refined multi-codec ID handling; compared with STAC9750, it provides native EAPD signaling and Asahi Kasei–optimized register compatibility - making AK4543VQ the preferred choice for PC99-compliant docking and legacy BIOS audio upgrades.
Availability
AK4543VQ is available at Aetrix Electronics and suitable for desktop PC motherboard design, laptop integrated audio subsystems, and aftermarket PCI sound cards requiring stable component supply and long-term obsolescence management.
Supply support for AK4543VQ 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
Asahi Kasei Microdevices (AKM) is a Japanese semiconductor company specializing in analog and mixed-signal ICs, particularly audio codecs, Hall-effect sensors, and power management solutions.
The AK4543VQ belongs to AKM's AC'97 audio codec product line, engineered specifically for PC98/PC99–certified desktop and mobile platforms requiring high-SNR, low-power, and multi-codec expandable audio subsystems.
FAQ
What is the primary function of the AK4543VQ in a PC audio system?
The AK4543VQ serves as a complete AC'97 Rev 2.1–compliant audio codec, performing analog-to-digital conversion (ADC) for microphone and line inputs, digital-to-analog conversion (DAC) for stereo/mono outputs, and real-time mixing with volume/mute control. In the AK4543VQ, these functions are integrated into a single LQFP-48 device that interfaces directly with an AC'97 controller via SYNC, BIT_CLK, SDATA_IN, and SDATA_OUT signals - eliminating the need for external op-amps or discrete mixers in PC98/PC99 designs.
Does the AK4543VQ support both primary and secondary codec operation?
Yes, the AK4543VQ supports dual-role operation through hardware strapping of ID0# (Pin 45) and ID1# (Pin 46). When set to 00, it functions as the Primary codec and outputs BIT_CLK; when configured as 01, 10, or 11, it operates as a Secondary codec receiving BIT_CLK from the Primary. This capability enables multi-codec topologies such as 4-speaker or 6-speaker output in docking stations - a feature explicitly documented in the AK4543VQ datasheet (M0046-E-02, p.1) and confirmed by its pin-level ID configuration logic.
What are the power supply requirements for the AK4543VQ?
The AK4543VQ requires two independent supplies: analog AVdd1/AVdd2 at 5.0 V ±5% (pins 25, 38) and digital DVdd1/DVdd2 at either 3.3 V or 5.0 V (pins 1, 9). Each supply must be decoupled with 0.1 µF + 4.7 µF capacitors to respective ground planes (AVss1/AVss2, DVss1/DVss2). The AK4543VQ draws 36–54 mA from AVdd and 6.6–20 mA from DVdd depending on operating mode - values measured and specified in the "Power Supplies" section of the official datasheet (M0046-E-02, p.5).
How does the AK4543VQ implement 3D stereo enhancement?
The AK4543VQ implements 3D stereo enhancement using an internal signal-processing block that requires a 27 nF capacitor connected between Pin 32 (3Dcap) and analog ground. This passive network sets the time constant for the on-chip spatial effect algorithm, which modifies phase and amplitude relationships between left/right channels to create perceived depth - a feature distinct to the AK4543VQ and absent in earlier AK4540/AK4542 variants, as confirmed in the "Features" section (p.1) and "Pin/Function" table (p.3) of M0046-E-02.
Is the AK4543VQ pin-compatible with earlier Asahi Kasei codecs?
Yes, the AK4543VQ is pin-compatible with the AK4540VQ and AK4542VQ in the same 48-pin LQFP package, sharing identical mechanical footprint, power pin locations (DVdd1/DVdd2, AVdd1/AVdd2), and AC'97 interface signals (SYNC, BIT_CLK, SDATA_IN/OUT). However, AK4543VQ introduces new functionality (e.g., 3Dcap, enhanced ID configuration) requiring minor software updates - a fact explicitly stated in the General Description: "The AK4543 is a pin compatible upgrade for the AK4540 and AK4542, some software changes will be required…" (M0046-E-02, p.1).
AK4543VQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Data Interface:
- -
- Resolution (Bits):
- -
- Number of ADCs / DACs:
- -
- Sigma Delta:
- -
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AK4543VQ FAQ
1.How can I place an order for AK4543VQ through Aetrix?
Please submit a Request for Quotation (RFQ) for AK4543VQ 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 AK4543VQ reliable?
The price and inventory of AK4543VQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AK4543VQ is usually 5 days.
3.What payment methods are accepted for AK4543VQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AK4543VQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AK4543VQ?
AK4543VQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AK4543VQ 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 AK4543VQ?
For technical support, including AK4543VQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AK4543VQ requirements.
6.How does Aetrix verify that AK4543VQ is sourced from the original manufacturer or authorized distributors?
All AK4543VQ 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 AK4543VQ meets industry standards.
7.What is the process for return or replacement of AK4543VQ?
All AK4543VQ units undergo pre-shipment inspection (PSI). If there is an issue with AK4543VQ, 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 AK4543VQ part is unused and in its original packaging.
Return procedure for AK4543VQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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