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NXP Semiconductors SAF7849HL/M295,557
- Part No.:
- SAF7849HL/M295,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Encoders, Decoders, Converters
- Package:
- 144-LQFP
- Datasheet:
-
SAF7849HL/M295,557.pdf
- Description:
- IC AUD DECODER 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,030
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Product details
Overview
SAF7849HL/M295,557 from NXP Semiconductors is a single-chip CD audio decoder IC integrating ARM7TDMI-S microprocessor (76 MHz / 68 MIPS), on-die MP3/WMA decoding, digital servo, stereo audio DAC with filterless pseudo-bitstream output, and laser driver supporting up to 120 mA. It implements full C3 error correction, 44.1 kHz sample-rate conversion, and real-time clock (32 kHz) for standby operation - deployed in cost-sensitive automotive and consumer CD/MP3/WMA playback systems.
For engineers reviewing the SAF7849HL/M295,557 datasheet, SAF7849HL/M295,557 pinout, SAF7849HL/M295,557 application, or SAF7849HL/M295,557 equivalent, this page delivers verified technical context, LQFP144 package mapping, functional pin roles, memory architecture (130 kB ROM + 64 kB Flash + 110 kB SRAM), servo interface signals (RA/FO/SL), and validated alternatives for CD audio system design.
Technical Context
The SAF7849HL/M295,557 integrates a 76 MHz ARM7TDMI-S core with dedicated hardware blocks: a 67 MHz PLL for channel decoding, a 152 MHz PLL for system logic, sigma-delta LF ADCs for D1–D4/R1–R2 photodiode inputs, and a 6-bit HF ADC for EFM signal acquisition. Its servo subsystem performs focus, radial, and sledge control using digitally processed PDM streams and software-configurable algorithms.
Audio processing includes I2S/S/PDIF outputs, subcode (V4) extraction, CD-Text decoding, and dual-path analog input handling: AUX_L/AUX_R for external tuner audio (10-bit, ~60 dB SNR), and four general-purpose GPIO-analog inputs (A_IN1–A_IN4) with 10-bit resolution for keypad or temperature sensing - all routed through shared sigma-delta converters with digital DC-offset cancellation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Processor | ARM7TDMI-S @ 76 MHz (68 MIPS); enables real-time MP3/WMA decode and custom servo firmware. |
| Memory Resources | 130 kB mask ROM (low-wait-state decompression), 64 kB reprogrammable Flash (field-upgradable app code), 110 kB SRAM (audio buffer & runtime data). |
| Digital Servo Interface | RA, FO, SL outputs with PDM sine/cosine (COS/GPIO31, SL_SIN) for stepper motor sledge control. |
| Laser Driver Capability | Up to 120 mA drive current with soft-start (0→nominal in 1 ms) and closed-loop power monitoring via MONITOR pin. |
| Audio Output | Filterless pseudo-bitstream stereo DAC (DAC_LP/LN, DAC_RP/RN); requires only 10 µF/100 nF decoupling at DAC_VREF. |
| Analog Inputs | Four general-purpose (A_IN1–A_IN4) + two auxiliary (AUX_L/AUX_R); all 10-bit via sigma-delta ADCs with digital offset cancellation. |
| Real-Time Clock | 32 kHz crystal-based RTC (OSC_32K_IN/OUT); maintains timekeeping in low-power standby mode. |
Pinout & Package
LQFP144 package (20 × 20 × 1.4 mm, 0.5 mm pitch) with 5 V-tolerant digital I/O, dedicated analog supply domains (VDDA1–VDDA3, VSSA1–VSSA3), and segregated digital core/periphery rails (VDDD1–VDDD4, VDDP1–VDDP3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SL_SIN (1) | Sledge actuator PDM output | Drives stepper motor sine phase; enables precise mechanical positioning without external driver IC. |
| COS/GPIO31 (2) | PDM cosine output / GPIO | Completes sledge motor drive waveform; configurable as general-purpose I/O when not used for motor control. |
| LASER (4) & MONITOR (5) | Laser diode drive & feedback | Direct high-current drive (≤120 mA) with real-time optical power regulation via monitor diode input. |
| D1–D4, R1–R2 (9–14) | OPU photodiode inputs | Feed sigma-delta LF ADCs; enable focus/radial/sledge servo loops with digital DC-offset compensation. |
| AUX_L/AUX_R (15–16) | External audio analog inputs | Route tuner or auxiliary source to ARM for bass boost/volume processing; share ADCs with D1/D2 (mutually exclusive). |
| DAC_LP/LN, DAC_RP/RN (23–27) | Differential audio DAC outputs | Deliver filterless pseudo-bitstream; require minimal external passive components for line-level output. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CD/MP3/WMA decode engine | Single-chip solution eliminates need for separate audio processor, reducing BOM count and PCB area in portable CD players. |
| Programmable ARM clock frequency | Enables dynamic trade-off between processing throughput (76 MHz) and power consumption for battery-operated devices. |
| Dedicated servo signal acquisition | Sigma-delta ADCs with digital DC-offset cancellation on D1–D4/R1–R2 ensure stable focus/radial loop performance across disc defects. |
| On-chip laser power control | Closed-loop regulation maintains consistent optical output over laser diode lifetime, eliminating manual calibration. |
| Real-time clock with 32 kHz crystal | Supports low-power standby mode while preserving timekeeping - critical for automotive head unit memory retention. |
Applications
| Automotive CD Head Unit | Portable MP3/CD Player |
|---|---|
Use Scenario: In-dash entertainment system playing CD-DA, CD-MP3, and CD-WMA discs with tuner integration. IC Role / Device Role / Timing Role: SAF7849HL/M295,557 serves as main audio decoder, servo controller, and ARM application host - managing disc read, audio decode, laser power, and UI functions. Use Value: Integrates CD servo, MP3 decode, and audio DAC into one die, reducing system cost and enabling compact 2-DIN form factor. |
Use Scenario: Battery-powered portable device supporting multi-format playback (CD-R, CD-RW, Video CD) and auxiliary line-in. IC Role / Device Role / Timing Role: SAF7849HL/M295,557 executes full CD transport control, digital servo, and real-time MP3 decompression while managing low-power states. Use Value: Programmable ARM clock and RTC allow aggressive power gating - extending battery life beyond 10 hours per charge. |
| Set-Top DVD/CD Combo Player | Industrial CD-Based Data Reader |
Use Scenario: Consumer electronics device combining CD audio playback with DVD video functionality via companion IC. IC Role / Device Role / Timing Role: SAF7849HL/M295,557 handles CD-specific tasks (EFM demodulation, CIRC correction, CD-Text) while offloading video to external decoder. Use Value: Dedicated 67 MHz PLL and block decoder hardware ensure bit-accurate CD audio timing independent of video subsystem clocks. |
Use Scenario: Embedded kiosk or medical device reading CD-ROM Mode 1/2 data discs for firmware updates or diagnostic logs. IC Role / Device Role / Timing Role: SAF7849HL/M295,557 acts as CD-ROM controller with robust error correction (C3), subcode parsing, and SPI/I2C host interface to main MCU. Use Value: On-chip 110 kB SRAM buffers sector reads; integrated CD-text decoder extracts metadata for automated device configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CD audio decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAA7834HL | Same LQFP144 package; lacks integrated ARM core and MP3/WMA decode - requires external microcontroller for firmware-driven servo and audio processing. | Used in legacy CD-only designs where cost sensitivity outweighs format flexibility; no native compressed audio support. | Select SAA7834HL only if MP3/WMA playback is unnecessary and external MCU resources are available for servo algorithm implementation. |
| SAF7847HL | Identical architecture and pinout; differs only in mask ROM content - supports different default firmware versions or regional feature sets. | Targeted at OEMs requiring variant-specific boot behavior or preloaded application code for specific market requirements. | Choose SAF7847HL when firmware differentiation (e.g., language packs, UI variants) is required without hardware redesign. |
Compared with SAF7849HL/M295,557, SAA7834HL requires external processing for servo and audio decode, increasing system complexity, while SAF7847HL offers identical hardware functionality with firmware-level differentiation - making SAF7849HL/M295,557 optimal for new designs needing integrated MP3/WMA capability and field-upgradable Flash.
Availability
SAF7849HL/M295,557 is available at Aetrix Electronics and suitable for automotive infotainment, portable media players, set-top combo units, and industrial CD-ROM readers requiring stable component supply and long-term lifecycle support.
Supply support for SAF7849HL/M295,557 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The SAF784x family was designed as a fully integrated CD audio platform targeting cost-optimized, single-chip implementations of CD/MP3/WMA playback systems - emphasizing reduced external component count and firmware flexibility via embedded ARM7TDMI-S.
FAQ
What is the maximum laser diode drive current supported by the SAF7849HL/M295,557?
The SAF7849HL/M295,557 supports up to 120 mA laser diode drive current via the LASER pin (pin 4), with integrated soft-start (0→nominal in 1 ms) and closed-loop power regulation using the MONITOR pin (pin 5). This ensures consistent optical output across laser aging and temperature variation without external feedback circuitry.
Does the SAF7849HL/M295,557 include on-chip memory for MP3/WMA decoding?
Yes, the SAF7849HL/M295,557 includes 130 kB mask-programmed ROM for low-latency decompression algorithms, 64 kB reprogrammable Flash ROM for application firmware updates, and 110 kB SRAM for audio buffering and runtime variables - all required for standalone MP3/WMA decode without external memory.
Can the SAF7849HL/M295,557 simultaneously process CD audio and auxiliary analog inputs like AUX_L/AUX_R?
No - AUX_L and AUX_R share sigma-delta ADCs with D1 and D2 photodiode inputs (controlled by lf_auxin_sel register), so they cannot be active concurrently. When AUX_L/AUX_R are enabled, D1/D2 are disabled, and vice versa. This hardware multiplexing prevents simultaneous CD servo operation and external audio processing.
What package type and pin count does the SAF7849HL/M295,557 use?
The SAF7849HL/M295,557 uses an LQFP144 package (SOT486-1) measuring 20 × 20 × 1.4 mm with 0.5 mm pin pitch. It has 144 leads, including dedicated analog supplies (VDDA1–VDDA3), digital core rails (VDDD1–VDDD4), and 32 GPIOs - confirmed in NXP's SAF784X_2 datasheet Rev. 02.
Is the SAF7849HL/M295,557 qualified for automotive applications?
Yes, the SAF7849HL/M295,557 is qualified in accordance with AEC-Q100 Grade 3 (−40 °C to +85 °C), making it suitable for automotive infotainment systems. Its integrated real-time clock, watchdog timer, and robust laser power control support reliable operation in vehicle environments with thermal cycling and electrical noise.
SAF7849HL/M295,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 144-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Audio Decoder
- Applications:
- Audio CD
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 1.8V, 3.3V
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 144-LQFP (20x20)
SAF7849HL/M295,557 FAQ
1.How can I place an order for SAF7849HL/M295,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAF7849HL/M295,557 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 SAF7849HL/M295,557 reliable?
The price and inventory of SAF7849HL/M295,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAF7849HL/M295,557 is usually 5 days.
3.What payment methods are accepted for SAF7849HL/M295,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAF7849HL/M295,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAF7849HL/M295,557?
SAF7849HL/M295,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAF7849HL/M295,557 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 SAF7849HL/M295,557?
For technical support, including SAF7849HL/M295,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAF7849HL/M295,557 requirements.
6.How does Aetrix verify that SAF7849HL/M295,557 is sourced from the original manufacturer or authorized distributors?
All SAF7849HL/M295,557 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 SAF7849HL/M295,557 meets industry standards.
7.What is the process for return or replacement of SAF7849HL/M295,557?
All SAF7849HL/M295,557 units undergo pre-shipment inspection (PSI). If there is an issue with SAF7849HL/M295,557, 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 SAF7849HL/M295,557 part is unused and in its original packaging.
Return procedure for SAF7849HL/M295,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SAF7849HL/M295,557 Tags
-
MCP2120T-I/SL
Microchip Technology
-
LICAL-ENC-MS001
TE Connectivity Linx
-
TW9990AT-NA1-GR
Renesas
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TVP5151IPBSR
Texas Instruments
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TVP5150AM1IPBSR
Texas Instruments
-
LICAL-DEC-MS001-T
TE Connectivity Linx
-
ADV7391BCPZ
Analog Devices Inc.
-
ADV7393BCPZ-REEL
Analog Devices Inc.
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ADV7393BCPZ
Analog Devices Inc.
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ADV7391WBCPZ
Analog Devices Inc.
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ADV7181DBCPZ
Analog Devices Inc.
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ADV7181CBSTZ-REEL
Analog Devices Inc.
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