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NXP Semiconductors SAA7327H/T/M2B,557

Name: SAA7327H/T/M2B,557
Brand: NXP Semiconductors
SKU: SAA7327H/T/M2B,557
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SAA7327H/T/M2B,557

Manufacturer:: NXP Semiconductors

Category:: Encoders, Decoders, Converters

Package:: 64-BQFP

Datasheet:: SAA7327H/T/M2B,557.pdf

Description:: IC DIGITAL/CD DAC DECODER 64QFP

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Product details

Overview

SAA7327H/T/M2B,557 from NXP Semiconductors (formerly Philips Semiconductors) is a single-chip digital servo processor and Compact Disc decoder with integrated bitstream DAC, designed specifically for Video CD (CD7 II) playback systems. It integrates EFM demodulation, t=2/e=4 error correction, 96fs bitstream DAC with −95 dB SNR (EIAJ A-weighted), lock-to-disc mode for ESA, and full subcode (Q-to-W, CD graphics) processing.

For engineers reviewing the SAA7327H/T/M2B,557 datasheet, SAA7327H/T/M2B,557 pinout, SAA7327H/T/M2B,557 application, or SAA7327H/T/M2B,557 equivalent, this device serves as a complete CD7 II system-on-chip for embedded optical disc players requiring integrated audio decoding, servo control, and analog output - with support for 1×/2× speed operation, I²C and 4-wire microcontroller interfaces, and differential DAC outputs.

Technical Context

The SAA7327H/T/M2B,557 implements a fully digital PLL-based clock regenerator and EFM demodulator with frame sync protection, double-timing validation, and RL2 correction. Its servo subsystem provides focus/radial loop control with automatic closed-loop gain adjustment, pulsed sledge support, and radial shock detection.

Audio processing includes programmable de-emphasis, 2×/4× oversampling IIR filter (−0.001 dB passband ripple to 9 kHz, ≥25 dB stopband attenuation at 24 kHz), 1-sample linear interpolation concealment, and peak-level detection with Q-channel embedding. The onboard DAC operates at 96fs with differential LP/LN and RP/RN outputs.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	3.0–3.6 V - supports standard 3.3 V logic and analog domains with separate VDDA1/VDDA2 and VDDD1(P)/VDDD2(C) rails
Crystal frequency	8.4672 / 16.9344 / 33.8688 MHz - enables 1× or 2× disc speed via internal PLL multiplier controlled by SELPLL pin
DAC SNR	−95 dB (typical, EIAJ A-weighted, 1 kHz, 1fs) - defines dynamic range for direct analog output without external DAC
Error correction	t = 2, e = 4 - corrects up to two symbol errors per C1 frame and four per C2 frame; flags output via CFLG and DOBM
Operating temperature	−10 °C to +70 °C - qualified for consumer video CD player environments, not extended industrial range
Disc speed modes	1× and 2× (n = 1 or 2) - selectable via decoder register B; lock-to-disc mode supports CAV playback within ±25% speed variation
Subcode interface	EIAJ CP-2401 3-/4-wire and V4 RS232-style Q-to-W - enables CD graphics display and real-time subcode readout

Pinout & Package

Package: QFP64 (SOT393-1), plastic quad flat package, 14 × 14 × 2.7 mm body, 64 leads, lead length 1.6 mm.

Pin/Terminal	Circuit Role	Design Meaning
LN / LP / RN / RP	Differential DAC outputs	Left/right channel bitstream DAC analog outputs; require external RC filtering per Fig.38/39 for optimal −95 dB SNR
SDI / SCLI / WCLI	Loopback serial audio inputs	Enable external digital audio (e.g., from VCD decoder) to be processed by onboard DAC in non-decoder mode
DATA / WCLK / SCLK / EF	Decoder serial output interface	3-state I²S/EIAJ-compatible outputs; tri-stated when onboard DAC is active (shadow reg 7 = XX11)
SELPLL	PLL multiplier enable control	High = enable internal clock multiplier for 8.4672/16.9344 MHz crystals; low = bypass multiplier
STATUS / SDA / SCL	MICROCONTROLLER INTERFACE	I²C-bus (SDA/SCL) or 4-wire bus (RAB/SILD/STATUS); STATUS doubles as open-drain interrupt or register readout
FO / RA / SL / LDON	Servo actuator outputs	Analog drive signals for focus actuator (FO), radial actuator (RA), sledge (SL), and laser diode enable (LDON)
D1–D4 / R1–R2	Photodiode current inputs	Unipolar current inputs for central/satellite photodiode signals; interface directly with front-end transimpedance amplifiers
CFLG / DOBM / EF	Error and flag outputs	CFLG = frame-synchronized 8-bit flag word; DOBM = EBU-format error bits; EF = per-byte error flag (3-state)

Key Features

Feature	Design Value
FIFO overflow concealment	Enables rotational shock resistance by holding last good sample or performing 1-sample linear interpolation on uncorrectable errors
Integrated bitstream DAC	Eliminates need for external DAC in cost-sensitive VCD players; differential outputs reduce common-mode noise and improve PSRR
Lock-to-disc mode	Supports Constant Angular Velocity (CAV) playback with variable data rate; maintains synchronization across ±25% disc speed variation
Full subcode processing	Handles Q-channel CRC, EIAJ 3-/4-wire CD graphics, and V4 RS232-style Q-to-W - enabling menu navigation and track display
Microcontroller interface flexibility	Supports both I²C-bus and TDA1301/SAA7345-compatible 4-wire protocol - simplifies firmware reuse across Philips CD platform designs
On-chip clock multiplier	Reduces BOM cost by allowing use of low-cost 8.4672 MHz crystal instead of 33.8688 MHz; eliminates external PLL IC

Applications

Video CD Player	CD-ROM Drive Controller
Use Scenario: Standalone consumer VCD player with analog audio output and CD graphics display. IC Role / Device Role / Timing Role: Primary CD7 II decoder and servo controller; generates all timing signals (WCLK, SCLK, CL16, CL11/4) and drives focus/radial actuators directly. Use Value: Single-chip integration reduces PCB area and component count; onboard DAC enables direct connection to headphone/line-out amplifiers.	Use Scenario: Embedded CD-ROM drive in industrial kiosk or point-of-sale terminal requiring robust error handling. IC Role / Device Role / Timing Role: CD data path processor with t=2/e=4 correction and subcode parsing; operates in CD-ROM mode with external DAC interface disabled. Use Value: Full C1/C2 error correction ensures reliable data retrieval from scratched discs; FIFO and concealment maintain data stream continuity during mechanical vibration.
ESA-Enabled Portable CD Player	Multi-Speed CD Audio System
Use Scenario: Battery-powered portable CD player with electronic shock absorption for mobile use. IC Role / Device Role / Timing Role: Servo controller implementing lock-to-disc mode and radial shock detection; manages motor control (MOTO1/MOTO2) and laser drive (LDON). Use Value: Lock-to-disc mode maintains playback during disc speed fluctuations caused by battery voltage sag or mechanical jolt; radial shock detector triggers immediate servo recovery.	Use Scenario: High-fidelity CD audio system supporting 1× and 2× playback with external DAC and digital output. IC Role / Device Role / Timing Role: Digital audio source with I²S/EIAJ output; uses onboard digital filter and de-emphasis; routes decoded audio to external DAC via DATA/WCLK/SCLK. Use Value: 4× oversampling filter (≤±0.001 dB ripple to 9 kHz) preserves transient response; de-emphasis activated automatically from Q-channel metadata.

Video CD Player

CD-ROM Drive Controller

Use Scenario: Standalone consumer VCD player with analog audio output and CD graphics display.

IC Role / Device Role / Timing Role: Primary CD7 II decoder and servo controller; generates all timing signals (WCLK, SCLK, CL16, CL11/4) and drives focus/radial actuators directly.

Use Value: Single-chip integration reduces PCB area and component count; onboard DAC enables direct connection to headphone/line-out amplifiers.

Use Scenario: Embedded CD-ROM drive in industrial kiosk or point-of-sale terminal requiring robust error handling.

IC Role / Device Role / Timing Role: CD data path processor with t=2/e=4 correction and subcode parsing; operates in CD-ROM mode with external DAC interface disabled.

Use Value: Full C1/C2 error correction ensures reliable data retrieval from scratched discs; FIFO and concealment maintain data stream continuity during mechanical vibration.

ESA-Enabled Portable CD Player

Multi-Speed CD Audio System

Use Scenario: Battery-powered portable CD player with electronic shock absorption for mobile use.

IC Role / Device Role / Timing Role: Servo controller implementing lock-to-disc mode and radial shock detection; manages motor control (MOTO1/MOTO2) and laser drive (LDON).

Use Value: Lock-to-disc mode maintains playback during disc speed fluctuations caused by battery voltage sag or mechanical jolt; radial shock detector triggers immediate servo recovery.

Use Scenario: High-fidelity CD audio system supporting 1× and 2× playback with external DAC and digital output.

IC Role / Device Role / Timing Role: Digital audio source with I²S/EIAJ output; uses onboard digital filter and de-emphasis; routes decoded audio to external DAC via DATA/WCLK/SCLK.

Use Value: 4× oversampling filter (≤±0.001 dB ripple to 9 kHz) preserves transient response; de-emphasis activated automatically from Q-channel metadata.

Equivalent & Alternatives

The following parts are listed as comparable options for similar CD decoder and servo controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SAA7345GP/N2,112	Successor CD7 III device with enhanced servo algorithms, higher integration (integrated laser driver), and support for CD-R/CD-RW; no onboard DAC.	Targeted at next-generation CD players requiring CD-R compatibility and lower external component count; requires external DAC.	Select SAA7345GP/N2,112 when upgrading to CD-R/CD-RW support and higher servo precision; not drop-in due to pinout and register map differences.
TDA1301T/N2,112	Dedicated CD audio DAC (no decoder/servo); 24-bit, 96 kHz capable; requires external CD decoder IC for data input.	Used in high-end audio systems where SAA7327H/T/M2B,557's integrated DAC is insufficient; separates decoding and conversion functions.	Select TDA1301T/N2,112 only when maximum audio fidelity is required and system architecture already includes a discrete CD decoder; adds complexity and BOM cost.

Compared with SAA7327H/T/M2B,557, the SAA7345GP/N2,112 offers superior servo performance and CD-R compatibility but removes the integrated DAC, while the TDA1301T/N2,112 delivers higher-resolution audio conversion but requires a separate decoder - making SAA7327H/T/M2B,557 the optimal choice for cost-sensitive, self-contained Video CD playback.

Availability

SAA7327H/T/M2B,557 is available at Aetrix Electronics and suitable for Video CD players, embedded CD-ROM drives, portable ESA-enabled CD devices, and multi-speed CD audio systems requiring stable component supply and long-lifecycle support.

Supply support for SAA7327H/T/M2B,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 acquired Philips Semiconductors in 2006 and continues to support legacy CD IC product lines with documentation, cross-references, and authorized distribution channels.

The SAA7327H/T/M2B,557 belongs to the CD7 II family of optical disc controllers, designed specifically for Video CD playback with integrated servo, decoding, and analog output - targeting cost-effective, single-board consumer electronics.

FAQ

What is the primary function of the SAA7327H/T/M2B,557 in a Video CD system?

The SAA7327H/T/M2B,557 serves as the core CD7 II system-on-chip, integrating CD decoding (EFM demodulation, error correction), digital servo control (focus/radial loops), and a 96fs bitstream DAC. It processes raw RF signals from the photodiode array, recovers digital audio and subcode data, drives actuators and laser, and outputs analog audio - eliminating the need for multiple discrete ICs in a VCD player design.

Does the SAA7327H/T/M2B,557 support both 1× and 2× disc speeds?

Yes, the SAA7327H/T/M2B,557 supports both 1× and 2× disc speeds via overspeed factor 'n'. Playback speed is configured through decoder register B, and the internal PLL clock multiplier (enabled by SELPLL) allows operation with 8.4672 MHz, 16.9344 MHz, or 33.8688 MHz crystals to achieve the required system clocks for either speed mode.

Can the onboard DAC in the SAA7327H/T/M2B,557 be used with external digital audio sources?

Yes, the SAA7327H/T/M2B,557 supports loopback mode: by setting shadow register 7 to XX01, the serial inputs (SDI, SCLI, WCLI) accept external digital audio (e.g., from a VCD video decoder), which is then routed to the onboard DAC. The DAC expects 16-bit 1fs I²S or EIAJ format - matching the output format selected via decoder register 3.

What subcode interfaces does the SAA7327H/T/M2B,557 provide for CD graphics applications?

The SAA7327H/T/M2B,557 provides three subcode interfaces: (1) EIAJ CP-2401-compliant 3-wire or 4-wire interface (pins SUB, SFSY, SBSY, RCK) for CD graphics display; (2) V4 pin RS232-style Q-to-W output with variable inter-byte timing; and (3) Q-channel CRC-validated data accessible via SDA/STATUS pins - enabling full CD+G menu and track information rendering.

How does the SAA7327H/T/M2B,557 handle uncorrectable errors during CD playback?

The SAA7327H/T/M2B,557 implements FIFO-based concealment: for isolated uncorrectable samples, it performs 1-sample linear interpolation between adjacent good samples; for consecutive errors, it holds the last valid sample until correction resumes. This mechanism is active in audio modes but disabled in CD-ROM mode, and status flags are output via CFLG and DOBM for system-level error monitoring.

SAA7327H/T/M2B,557 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 64-BQFP

Packaging:: Tray

Product Status:: Obsolete

Type:: Audio Decoder

Applications:: -

Voltage - Supply, Analog:: -

Voltage - Supply, Digital:: 3V ~ 3.6V

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 64-QFP (14x14)

SAA7327H/T/M2B,557 FAQ

1.How can I place an order for SAA7327H/T/M2B,557 through Aetrix?

Please submit a Request for Quotation (RFQ) for SAA7327H/T/M2B,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 SAA7327H/T/M2B,557 reliable?

The price and inventory of SAA7327H/T/M2B,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAA7327H/T/M2B,557 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAA7327H/T/M2B,557 transactions.

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4.How is shipping managed for SAA7327H/T/M2B,557?

SAA7327H/T/M2B,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SAA7327H/T/M2B,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 SAA7327H/T/M2B,557?

For technical support, including SAA7327H/T/M2B,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAA7327H/T/M2B,557 requirements.

6.How does Aetrix verify that SAA7327H/T/M2B,557 is sourced from the original manufacturer or authorized distributors?

All SAA7327H/T/M2B,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 SAA7327H/T/M2B,557 meets industry standards.

7.What is the process for return or replacement of SAA7327H/T/M2B,557?

All SAA7327H/T/M2B,557 units undergo pre-shipment inspection (PSI). If there is an issue with SAA7327H/T/M2B,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 SAA7327H/T/M2B,557 part is unused and in its original packaging.

Return procedure for SAA7327H/T/M2B,557:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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