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NXP Semiconductors MC14LC5480DW
- Part No.:
- MC14LC5480DW
- Manufacturer:
- NXP Semiconductors
- Category:
- CODECS
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC14LC5480DW.pdf
- Description:
- IC CODEC-FILTER PCM 5V 20-SOIC W
- Quantity:
- Payment:
- Shipping:
Inventory:1,695
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Product details
Overview
MC14LC5480DW from Freescale Semiconductor is a single-supply, 20-pin SOG-packaged PCM codec-filter IC performing voice digitization and reconstruction with pin-selectable μ-law or A-law companding, on-chip 200 Hz–3.4 kHz band-pass (transmit) and 3.4 kHz low-pass (receive) filtering, and integrated 1.575 V precision reference voltage - used in telephony line interface cards and ISDN terminal adapters.
For engineers reviewing the MC14LC5480DW datasheet, MC14LC5480DW pinout, MC14LC5480DW application, or MC14LC5480DW equivalent, key selection factors include its differential analog signal path, 5 V single-supply operation, 15 mW typical power dissipation, support for Long/Short Frame Sync, IDL, and GCI digital interfaces, and compatibility with Motorola/Freescale telecom transceivers including MC145472 and MC145422.
Technical Context
The MC14LC5480DW implements a fully differential analog signal chain: transmit path begins with an FET-input op-amp (TI+/TI− → TG), feeds into active R-C pre-filtering, then a differential switched-capacitor band-pass filter (200 Hz–3.4 kHz), followed by a differential compressing ADC; receive path uses a differential DAC, sinX/X-compensated 3.4 kHz switched-capacitor low-pass filter, active R-C post-filtering, and push-pull 300 Ω power drivers (PO+/PO−).
Digital timing is flexible: MCLK accepts 256 kHz to 4.096 MHz and auto-prescales to generate internal 256 kHz sequencing; FST/FSR accept 8 kHz frame sync in Long/Short Frame Sync modes; BCLKR logic level selects IDL (BCLKR = 1) or GCI (BCLKR = 0) interface mode, enabling dual-B-channel ISDN support without external mode configuration logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | Single 5 V - eliminates need for dual ±5 V supplies and simplifies system power architecture. |
| Power Dissipation | 15 mW typical, 0.01 mW in power-down - enables low-heat generation in dense line-card layouts. |
| Analog Bandwidth | Transmit: 200 Hz–3.4 kHz band-pass; Receive: 3.4 kHz low-pass - meets ITU-T G.711 voiceband requirements with no external filters. |
| Companding Law | PIN-selectable μ-law (Pin 16 = VDD) or A-law (Pin 16 = VSS) - supports global telephony standards without firmware change. |
| Digital Interface Modes | Long Frame Sync, Short Frame Sync, IDL, GCI - interoperates with legacy TDM switches and ISDN U/S/T-interface transceivers. |
| Reference Voltage | On-chip 1.575 V precision bandgap - ensures stable ADC/DAC performance across temperature and supply variation. |
| Output Drive | PO+/PO− push-pull, 300 Ω load, 6.3 Vpp - directly drives telephone hybrid circuits without external amplifiers. |
Pinout & Package
MC14LC5480DW is housed in a 20-pin Small Outline Package (SOG), case 751D, with 0.3 inch body width and standard SOIC-compatible footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (6) | Positive Power Supply | 5 V main supply; requires 0.1 µF ceramic decoupling to VSS for noise suppression. |
| VSS (15) | Negative Power Supply | Ground reference (0 V); all digital logic and analog ground return. |
| VAG (20) | Analog Ground Output | Regulated 2.4 V mid-supply reference; all internal analog circuitry referenced to this node. |
| Mu/A (16) | Companding Law Select | Logic-high = μ-law; logic-low = A-law - configures both encoder compression and decoder expansion. |
| PDI (10) | Power-Down Input | Logic-low forces full chip shutdown: all outputs (RO±, PO±, DT, TG, VAG) go high-impedance; 0.01 mW standby. |
| TI+ (19), TI− (18) | Transmit Analog Inputs | FET-input op-amp terminals; support differential or single-ended input with level-shifting via VAG reference. |
| TG (17) | Transmit Gain Output | Op-amp output feeding transmit filter; capable of driving 2 kΩ; becomes high-Z when TI+/TI− tied to VDD. |
| RO+ (1), RO− (2) | Receive Analog Outputs | Differential outputs from smoothing filter; drive 2 kΩ to VAG; 1.575 V peak amplitude. |
| PI (3), PO− (4), PO+ (5) | Power Amplifier Interface | Inverting op-amp gain stage (PI→PO−) with PO+ as inverted output; forms 300 Ω push-pull driver pair. |
| MCLK (11) | Master Clock Input | Accepts 256 kHz–4.096 MHz; auto-scales internally to 256 kHz for ADC/DAC/filter timing. |
| FST (14), FSR (7) | Frame Sync Inputs | 8 kHz sync signals; FST controls DT output enable; FSR selects B1/B2 channel in IDL/GCI mode. |
| BCLKT (12), BCLKR (9) | Bit Clock Inputs | BCLKT clocks transmit data; BCLKR logic level selects IDL (high) or GCI (low) interface mode. |
| DT (13), DR (8) | Digital Data I/O | DT: 8-bit serial PCM output synchronized to FST/BCLKT; DR: 8-bit serial PCM input synchronized to FSR/BCLKR. |
Key Features
| Feature | Design Value |
|---|---|
| Fully-differential analog design | Doubles effective input dynamic range vs. single-ended; rejects common-mode supply noise and improves PSRR. |
| On-chip transmit/receive filters | Eliminates 8 external RC/LC components - reduces BOM count, board area, and calibration effort. |
| Pin-selectable μ-law/A-law | Hardware-configured companding avoids software overhead and ensures deterministic real-time behavior. |
| Integrated 1.575 V reference | Stable, temperature-compensated voltage source shared by ADC and DAC - ensures consistent gain and distortion performance. |
| 300 Ω push-pull power drivers | Direct interface to telephone line hybrids; adjustable gain via external PI/PO− resistors - no external driver stage required. |
Applications
| Telecom Line Card | ISDN Terminal Adapter |
|---|---|
Use Scenario: Embedded in central office or remote terminal line cards handling 24–30 simultaneous analog POTS lines. IC Role / Device Role / Timing Role: Performs A/D and D/A conversion, anti-aliasing and reconstruction filtering, and μ-law companding per channel - core voiceband signal conditioning block. Use Value: Enables compact, low-power, single-chip voice channel implementation meeting GR-905 and ITU-T G.711 compliance without external filters or references. | Use Scenario: Integrated into S/T-interface ISDN terminal equipment (TE) for BRI U-interface termination. IC Role / Device Role / Timing Role: Acts as PCM interface between ISDN controller (e.g., MC145474) and analog line side - handles B-channel PCM framing in IDL/GCI mode. Use Value: Supports dual-B-channel operation via FSR pin selection and maintains timing alignment with MC145472/MC145422 transceivers. |
| VoIP Gateway FXS Port | Digital PBX Interface |
Use Scenario: Used in VoIP gateways to convert analog PSTN lines to IP-based voice streams via DSP or VoIP processor. IC Role / Device Role / Timing Role: Provides standardized G.711-compliant PCM data stream synchronized to DSP's TDM bus using Long/Short Frame Sync. Use Value: Delivers 30 dB SNR and < −40 dB THD+N over 40 dB dynamic range - ensures carrier-grade voice quality at minimal processing latency. | Use Scenario: Installed in enterprise digital PBX systems connecting analog extensions to time-division multiplexed backplane. IC Role / Device Role / Timing Role: Serves as channelized codec for 8–16 port analog station interface modules - operates in synchronous TDM environment with shared MCLK and frame sync. Use Value: Single 5 V supply and 15 mW dissipation allow high-density port packing; pin compatibility with MC145480 simplifies legacy upgrade paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCM codec-filter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC145480P | Pin-for-pin compatible DIP variant; identical electrical specs but plastic DIP (case 738) instead of SOG. | Preferred for through-hole prototyping or legacy DIP-based designs; same timing, filtering, and companding functionality. | Select MC145480P only when DIP package and manual assembly are required; MC14LC5480DW offers superior thermal performance and board density. |
| MC14LC5480SD | SSOP-20 variant (case 940C); identical die and functionality; smaller footprint than SOG but tighter pitch (0.65 mm). | Suitable for space-constrained surface-mount designs where SOG lead spacing is insufficient. | Choose MC14LC5480SD for miniaturized telecom modules; verify reflow profile compatibility due to SSOP thermal mass. |
Compared with MC145480P and MC14LC5480SD, the MC14LC5480DW provides identical analog/digital performance and pinout in a thermally enhanced SOG package optimized for automated SMT assembly and improved power dissipation in multi-channel line cards.
Availability
MC14LC5480DW is available at Aetrix Electronics and suitable for telecom line cards, ISDN terminal adapters, VoIP gateway FXS ports, and digital PBX analog interface modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MC14LC5480DW 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
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in automotive, industrial, and communications ICs with strong heritage in telephony and networking silicon.
The MC14LC5480DW belongs to Freescale's legacy telecom codec portfolio, designed specifically for carrier-grade voice digitization in POTS, ISDN, and early VoIP infrastructure - emphasizing integration, low power, and global companding standard compliance.
FAQ
What is the primary function of the MC14LC5480DW in a telephony system?
The MC14LC5480DW serves as a complete PCM codec-filter IC that performs analog-to-digital and digital-to-analog conversion of voiceband signals (200 Hz–3.4 kHz), applies μ-law or A-law companding, and integrates transmit band-pass and receive low-pass filtering - eliminating the need for external op-amps, filters, or voltage references in telephony line interface designs.
Does the MC14LC5480DW require external passive components for basic operation?
No, the MC14LC5480DW requires only three external capacitors for decoupling: 0.1 µF between VDD and VSS, and 0.01–0.1 µF between VAG and VSS. All critical analog functions - including anti-aliasing, reconstruction, and reference generation - are implemented on-die, making the MC14LC5480DW a true single-chip voiceband solution.
How does the MC14LC5480DW handle power-down, and what happens to its outputs?
The MC14LC5480DW supports two power-down methods: asserting logic-low on PDI (Pin 10), or holding both FST and FSR low for several 8 kHz frames. In either case, RO+, RO−, PO+, PO−, TG, DT, and VAG enter high-impedance states, reducing power dissipation to 0.01 mW - a critical feature for energy-efficient line cards with dynamic channel activation.
Can the MC14LC5480DW interface directly with ISDN S/T-interface transceivers like the MC145474?
Yes, the MC14LC5480DW is explicitly designed for interoperability with Freescale's telecom transceiver family. When configured in IDL mode (BCLKR = 1), it accepts 8 kHz frame sync and 2.048 MHz bit clock from MC145474/MC145422, providing seamless B-channel PCM data exchange - confirmed in Freescale's application documentation and pin compatibility matrices.
What is the significance of the VAG (Pin 20) output, and how must it be used?
VAG (Pin 20) is a regulated 2.4 V analog ground reference that serves as the common-mode bias point for all internal analog circuitry in the MC14LC5480DW. It must be decoupled to VSS with a 0.01–0.1 µF ceramic capacitor. All analog inputs (TI+/TI−) and outputs (RO+/RO−, PO+/PO−) are referenced to VAG - improper decoupling or routing causes increased noise and distortion in the MC14LC5480DW's voiceband performance.
MC14LC5480DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- PCM, Filter
- Data Interface:
- PCM Audio Interface
- Resolution (Bits):
- 13 b
- Number of ADCs / DACs:
- 1 / 1
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MC14LC5480DW FAQ
1.How can I place an order for MC14LC5480DW through Aetrix?
Please submit a Request for Quotation (RFQ) for MC14LC5480DW 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 MC14LC5480DW reliable?
The price and inventory of MC14LC5480DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC14LC5480DW is usually 5 days.
3.What payment methods are accepted for MC14LC5480DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC14LC5480DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC14LC5480DW?
MC14LC5480DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC14LC5480DW 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 MC14LC5480DW?
For technical support, including MC14LC5480DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC14LC5480DW requirements.
6.How does Aetrix verify that MC14LC5480DW is sourced from the original manufacturer or authorized distributors?
All MC14LC5480DW 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 MC14LC5480DW meets industry standards.
7.What is the process for return or replacement of MC14LC5480DW?
All MC14LC5480DW units undergo pre-shipment inspection (PSI). If there is an issue with MC14LC5480DW, 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 MC14LC5480DW part is unused and in its original packaging.
Return procedure for MC14LC5480DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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