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NXP Semiconductors MC14LC5480DWR2
- Part No.:
- MC14LC5480DWR2
- Manufacturer:
- NXP Semiconductors
- Category:
- CODECS
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC14LC5480DWR2.pdf
- Description:
- IC CODEC PCM FILTER 13B 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
MC14LC5480DWR2 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 (Tx) and 3.4 kHz low-pass (Rx) filters, and integrated 1.575 V precision reference voltage - used in telephony line interface cards and ISDN terminal adapters.
For engineers reviewing the MC14LC5480DWR2 datasheet, MC14LC5480DWR2 pinout, MC14LC5480DWR2 application, or MC14LC5480DWR2 equivalent, key selection criteria include differential analog signal processing, 5 V single-supply operation, 15 mW typical power dissipation, μ/A-law selectability via Pin 16, and compatibility with IDL/GCI/Long/Short Frame Sync digital interfaces.
Technical Context
The MC14LC5480DWR2 implements fully-differential analog signal paths from TI+/TI– through TG to switched-capacitor filtering and compression ADC, enabling 42 dB dynamic range with 6-bit effective resolution across seven chords. Its transmit path includes active R-C pre-filtering and a 5-pole differential switched-capacitor band-pass filter centered at 200–3400 Hz.
The receive path uses a differential D/A converter followed by sinX/X-compensated 3400 Hz low-pass filtering, active R-C post-filtering, and push-pull 300 Ω power drivers (PO+/PO–) with external gain adjustment via PI. Power-down is supported via PDI (Pin 10) or dual-frame-sync hold (FST+FSR low), placing RO+/RO–, PO+/PO–, DT, TG, and VAG in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | Single 5 V (VDD = +5 V, VSS = 0 V); enables simplified power design without dual supplies |
| Power Dissipation | 15 mW typical active; 0.01 mW in power-down mode - supports energy-sensitive telecom line cards |
| Companding Law | Pin-selectable μ-law (Pin 16 = VDD) or A-law (Pin 16 = VSS); ensures regional compliance (North America/Japan vs. Europe) |
| Analog Bandwidth | Transmit: 200 Hz–3.4 kHz band-pass; Receive: 3.4 kHz low-pass - meets ITU-T G.711 voiceband requirements |
| Reference Voltage | On-chip 1.575 V precision bandgap reference - eliminates need for external voltage reference component |
| Digital Interface Modes | Supports Long Frame Sync, Short Frame Sync, IDL (BCLKR = 1), and GCI (BCLKR = 0) - interoperates with Motorola telecom transceivers (e.g., MC145474, MC145422) |
| Output Drive | PO+/PO– push-pull outputs drive 300 Ω load to ±1.575 V (6.3 VPP) referenced to VAG - directly interfaces with telephone hybrid circuits |
Pinout & Package
MC14LC5480DWR2 is housed in a 20-pin SOG (Small Outline Gull-wing) package per Case 751D, with gull-wing leads, 0.025" pitch, and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TI+, TI– (Pins 19, 18) | Transmit analog input differential pair | Accept single-ended or differential voice signals; referenced to VAG (2.4 V); enable level-shifting from VSS-referenced sources |
| TG (Pin 17) | Transmit gain amplifier output | Drives 2 kΩ load; becomes high-impedance when TI+/TI– tied to VDD - allows direct injection into transmit filter |
| RO+, RO– (Pins 1, 2) | Receive analog output differential pair | Deliver filtered DAC output; drive 2 kΩ to VAG or 4 kΩ differentially; high-impedance in power-down |
| PO+, PO– (Pins 5, 4) | Push-pull power amplifier outputs | Drive 300 Ω load to ±1.575 V (6.3 VPP); gain adjustable via PI (Pin 3) and external resistors |
| MCLK (Pin 11) | Master clock input | Accepts 256 kHz–4.096 MHz; auto-prescales to generate internal 256 kHz sequencing clock - independent of data interface mode |
| FST, FSR (Pins 14, 7) | Frame sync inputs (Tx/Rx) | Control PCM word timing; dual-low condition triggers automatic power-down - eliminates need for external control logic |
| BCLKT, BCLKR (Pins 12, 9) | Bit clock inputs (Tx/Rx) | BCLKR logic level selects IDL (high) or GCI (low); BCLKT controls Tx data rate and Rx rate in ISDN modes |
| DT, DR (Pins 13, 8) | PCM data I/O (Tx/Rx) | High-impedance except during active data transfer; DT remains tri-stated ≥2 FST cycles after power-up |
| PDI (Pin 10) | Power-down input | Logic 0 forces full chip shutdown - all analog outputs, VAG, and DT go high-Z; restores function on logic 1 with FST present |
| Mu/A (Pin 16) | Companding law select | Direct hardware configuration: VDD = μ-law, VSS = A-law - no firmware or register programming required |
Key Features
| Feature | Design Value |
|---|---|
| Fully-differential analog signal path | Doubles allowable input amplitude vs. single-ended designs and rejects common-mode supply noise - improves PSRR by >60 dB |
| Integrated transmit/receive filters | On-chip 200 Hz–3.4 kHz band-pass (Tx) and 3.4 kHz low-pass (Rx) eliminate 6–8 external passive components per channel |
| Pin-selectable μ-law/A-law | No software configuration needed; hardware-selectable companding satisfies regional telephony standards without re-spinning PCB |
| On-chip 1.575 V precision reference | Bandgap-based, temperature- and supply-stable reference shared by ADC/DAC - removes external reference IC and associated decoupling |
| 300 Ω push-pull power drivers | PO+/PO– deliver ±1.575 V into 300 Ω load (6.3 VPP) - directly drives telephone line hybrids without external amplifiers |
| Multi-mode digital interface | Hardware-compatible with Long/Short Frame Sync, IDL, and GCI - enables reuse across legacy TDM switches and ISDN terminal equipment |
Applications
| Telephony Line Interface Card (LIC) | ISDN Terminal Adapter (TA) |
|---|---|
Use Scenario: Digitizing analog POTS line signals for connection to digital PBX or VoIP gateway. IC Role / Device Role / Timing Role: Performs A-law/μ-law PCM encoding/decoding, anti-aliasing and reconstruction filtering, and line-driver amplification - acts as the analog front-end bridge between copper loop and digital switch fabric. Use Value: Eliminates need for discrete op-amps, external filters, and voltage references; reduces BOM count by ≥12 components while meeting ITU-T G.711 performance. | Use Scenario: Enabling S/T-interface connectivity for ISDN BRI devices such as routers or fax gateways. IC Role / Device Role / Timing Role: Provides synchronized 64 kbps B-channel PCM conversion in IDL or GCI mode, interfacing with MC145474 U-interface transceivers and SLICs like MC3419. Use Value: Hardware-selectable timing modes and pin-compatible replacement for MC145480 allow drop-in upgrade in existing ISDN TA designs. |
| Digital Set-Top Box Audio Codec | Legacy Telecom Equipment Retrofit |
Use Scenario: Adding PSTN fallback audio path in cable or satellite STBs requiring analog telephony support. IC Role / Device Role / Timing Role: Converts bidirectional voice between internal digital audio bus (e.g., I²S or PCM highway) and external RJ-11 line - operates in synchronous Long Frame Sync mode with host SoC. Use Value: Single 5 V supply and 15 mW dissipation minimize thermal impact in space-constrained enclosures; VAG-referenced outputs simplify coupling to transformerless line interfaces. | Use Scenario: Replacing obsolete MC145480 in field-deployed central office line cards or multiplexers. IC Role / Device Role / Timing Role: Pin-for-pin functional replacement with identical SOG footprint, identical pin functions, and enhanced noise immunity due to differential architecture. Use Value: Enables lifecycle continuity without PCB redesign; maintains full compatibility with existing control logic, clock trees, and firmware. |
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 | Predecessor in DIP package; lacks differential analog design, higher noise floor, no on-chip reference - requires external 1.575 V reference | Same μ/A-law functionality and timing modes but limited to legacy through-hole assembly; not suitable for new SMT designs | Select MC14LC5480DWR2 for new designs requiring lower noise, reduced component count, and SOG packaging. |
| TP3067CP | CMOS PCM codec with μ-law only; no A-law support; uses external reference; no integrated power drivers - requires external op-amps for line driving | Compatible with Long/Short Frame Sync only; no IDL/GCI support - unsuitable for ISDN applications | Choose MC14LC5480DWR2 when A-law compliance, ISDN interface support, or integrated 300 Ω drivers are required. |
Compared with MC145480P and TP3067CP, the MC14LC5480DWR2 delivers superior noise performance via full differential analog design, eliminates external reference dependency, and provides native ISDN interface support - making it the optimal choice for new telecom front-end designs requiring regulatory compliance and layout efficiency.
Availability
MC14LC5480DWR2 is available at Aetrix Electronics and suitable for telephony line interface cards, ISDN terminal adapters, and digital set-top box audio subsystems requiring stable component supply and long-term industrial availability.
Supply support for MC14LC5480DWR2 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 embedded processing, analog, and mixed-signal solutions for automotive, industrial, and communications markets.
The MC14LC5480DWR2 belongs to Freescale's legacy telecom analog front-end product line, designed specifically for voiceband digitization in carrier-grade and enterprise telephony systems compliant with ITU-T G.711.
FAQ
What is the primary function of the MC14LC5480DWR2 in a telephony system?
The MC14LC5480DWR2 serves as a complete PCM codec-filter IC that digitizes analog voice signals (via μ-law or A-law companding ADC) and reconstructs them (via DAC), while integrating transmit band-pass (200 Hz–3.4 kHz) and receive low-pass (3.4 kHz) filters, on-chip 1.575 V reference, and 300 Ω push-pull line drivers - eliminating the need for 10+ discrete analog components in traditional LIC designs.
Does the MC14LC5480DWR2 require an external voltage reference?
No. The MC14LC5480DWR2 integrates a precision 1.575 V bandgap voltage reference shared by both its ADC and DAC sections. This eliminates the need for an external reference IC, reduces PCB area, and improves temperature stability - a key differentiator from alternatives like TP3067CP which require external reference circuitry.
How does the MC14LC5480DWR2 support both μ-law and A-law companding?
The MC14LC5480DWR2 supports μ-law and A-law companding via hardware pin selection: connecting Pin 16 (Mu/A) to VDD selects μ-law (used in North America and Japan), while connecting it to VSS selects A-law (used in Europe). This eliminates firmware configuration and ensures deterministic, glitch-free mode switching - critical for carrier-grade telephony equipment certification.
What digital interface modes does the MC14LC5480DWR2 support, and how are they selected?
The MC14LC5480DWR2 supports four digital interface modes: Long Frame Sync, Short Frame Sync, IDL (Interchip Digital Link), and GCI. IDL mode is selected by holding BCLKR (Pin 9) high for ≥2 FST rising edges; GCI mode is selected by holding BCLKR low. Frame sync polarity and bit clock alignment are automatically detected - no register writes or initialization sequence required.
Can the MC14LC5480DWR2 be used as a direct replacement for the MC145480?
Yes - the MC14LC5480DWR2 is explicitly documented as a pin-for-pin replacement for the MC145480. It retains identical pinout, electrical timing, and functional behavior while adding improvements including fully-differential analog design, integrated 1.575 V reference, and lower power dissipation (15 mW vs. ~25 mW), making it suitable for drop-in upgrades in legacy designs.
MC14LC5480DWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
MC14LC5480DWR2 FAQ
1.How can I place an order for MC14LC5480DWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC14LC5480DWR2 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 MC14LC5480DWR2 reliable?
The price and inventory of MC14LC5480DWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC14LC5480DWR2 is usually 5 days.
3.What payment methods are accepted for MC14LC5480DWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC14LC5480DWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC14LC5480DWR2?
MC14LC5480DWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC14LC5480DWR2 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 MC14LC5480DWR2?
For technical support, including MC14LC5480DWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC14LC5480DWR2 requirements.
6.How does Aetrix verify that MC14LC5480DWR2 is sourced from the original manufacturer or authorized distributors?
All MC14LC5480DWR2 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 MC14LC5480DWR2 meets industry standards.
7.What is the process for return or replacement of MC14LC5480DWR2?
All MC14LC5480DWR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC14LC5480DWR2, 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 MC14LC5480DWR2 part is unused and in its original packaging.
Return procedure for MC14LC5480DWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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