My Inquiry
My Account
Microchip Technology LE78D110BVC
- Part No.:
- LE78D110BVC
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 44-TQFP
- Datasheet:
-
LE78D110BVC.pdf
- Description:
- IC TELECOM INTERFACE 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,993
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LE78D110BVC from Zarlink Semiconductor is a dual-channel Voice-over-Broadband SLAC (Subscriber Line Audio Codec) IC designed for BORSCHT functions in VoIP/DSL, cable telephony, and FTTH gateways. It performs A-law/µ-law/ADPCM codec conversion, real-time line supervision (off-hook/ring-trip/fault), DTMF/FSK/caller ID tone generation & detection, and adaptive transhybrid echo cancellation - all at 3.3 V operation in a 44-pin TQFP package.
For engineers reviewing the LE78D110BVC datasheet, LE78D110BVC pinout, LE78D110BVC application, or LE78D110BVC equivalent, this device serves as the digital signal processing core in integrated access devices requiring GR-909-compliant loop testing, programmable impedance matching, and software-configurable voice line circuits with VoicePath™ API support.
Technical Context
The LE78D110BVC implements fixed-function DSP resources for modem/fax tone (1100 Hz/2100 Hz) detection, DTMF decoding, ADPCM compression, and adaptive transhybrid balance - dynamically adjusting filter coefficients to minimize echo under varying line conditions. It interfaces exclusively with Zarlink VoSLIC devices (e.g., LE77D11) via SLI control signals (C1–C3), analog inputs (VIN/IMT/F), and outputs (VDC/VOUT).
It supports two mutually exclusive digital interface modes: PCM/MPI (separate voice and control paths using PCLK/FS/DXA/DRA) and GCI (combined voice/control on DD/DU bus with 8-channel framing). Clocking derives from internal PLL locked to 512 kHz reference, sourced either from PCLK, MCLK, or DCL depending on mode - with automatic 2.048 MHz/4.096 MHz DCL detection in GCI mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual-channel VoSLAC (Voice Subscriber Line Audio Codec) for BORSCHT implementation with integrated DSP |
| Supply Voltage | 3.3 V ±5% - enables direct interfacing with 3.3 V system controllers and low-power VoIP gateway designs |
| Codec Formats | 16-bit linear, 8-bit A-law or µ-law, 32 kbit/s or 24 kbit/s ADPCM - selectable per channel for global telephony compliance |
| Interface Modes | PCM/MPI (separate voice/control) or GCI (combined) - pin-multiplexed; mode auto-detected at power-up or via command |
| Line Supervision | GR-909-compliant drop testing (Hazardous Potential, FEMF, Resistive Faults, Loop Length) plus real-time AC/DC fault reporting |
| Tone Support | DTMF generation & detection; FSK caller ID (Type I/II/worldwide); metering & call progress tones - all programmable in firmware |
| Package | 44-pin TQFP (Green/RoHS-compliant) - matches LE78D110VC pinout with identical mechanical footprint and thermal profile |
Pinout & Package
LE78D110BVC is housed in a 44-pin Thin Quad Flat Package (TQFP) with 0.8 mm pitch, RoHS-compliant green molding compound. Pin functions are defined for dual-mode operation (PCM/MPI or GCI), with shared pins repurposed based on detected interface protocol.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PCLK/FSC | Primary clock input / Frame Sync clock | In PCM mode: PCLK strobes voice data; in GCI mode: FSC defines 8 kHz frame boundary for channel timing |
| FS/DCL | Frame Sync / Data Clock | In PCM mode: FS synchronizes 8 kHz frames; in GCI mode: DCL provides bit-rate reference (2.048/4.096 MHz) |
| DXA/DU | Data transmit out / GCI upstream data | PCM: serial voice output; GCI: combined voice/control upstream data stream (DU) to host controller |
| DRA/DD | Data receive in / GCI downstream data | PCM: serial voice input; GCI: combined voice/control downstream data stream (DD) from host controller |
| DIN/S1 | MPI data in / GCI channel select | PCM/MPI: command/data input; GCI: selects lower 2 bits of 3-bit channel address (S1,S0,S2) |
| DOUT/S2 | MPI data out / GCI channel select | PCM/MPI: status/data output; GCI: selects MSB of 3-bit channel address (S2) |
| TSCA/G | Time slot control / GCI mode select | PCM: sets transmit/receive clock slot alignment; GCI: DGND = dual-bearer mode, VCCD = single-bearer mode |
| VIN1/VIN2 | Analog input from SLIC | Accepts scaled metallic AC voltage (proportional to loop current) from LE77D11 for off-hook/ring-trip detection |
| IMT1/IMT2 | Current sense input | Receives 1/500th loop current from LE77D11; full-scale 204 µA = 102 mA metallic current for supervision logic |
| F1/F2 | Fault indication input | Logic-low active signals indicating longitudinal fault or foreign EMF - triggers GR-909 hazard detection |
| VDC1/VDC2 | Loop current limit control | Analog voltage outputs (7 programmable levels) setting DC loop current threshold for LE77D11 SLIC channels |
| VOUT1/VOUT2 | Analog output to SLIC | Delivers reconstructed voice, ringing waveforms, test signals, or metering tones to LE77D11 SLIC interface |
Key Features
| Feature | Design Value |
|---|---|
| GR-909-compliant self-test suite | On-chip execution of hazardous potential, foreign EMF, resistive fault, ringers, and loop length tests - no external test equipment required |
| Adaptive transhybrid balance | Real-time DSP filter coefficient adjustment to maintain >45 dB echo return loss across varying loop impedances and lengths |
| Worldwide programmability | Runtime configuration of ringing waveform, two-wire AC impedance, gain, loop closure thresholds, and call progress tones via MPI or GCI |
| Integrated tone engine | Simultaneous DTMF generation/detection + FSK caller ID (Type I/II) + modem/fax tone (1100/2100 Hz) detection - all hardware-accelerated |
| VoicePath™ API compatibility | ANSI C software development kit enabling rapid integration of advanced features (e.g., caller ID parsing, tone management) without low-level register programming |
Applications
| Voice over IP Gateway | Cable Telephony NIU |
|---|---|
Use Scenario: Residential VoIP gateway handling two simultaneous POTS lines with SIP signaling and PSTN fallback. IC Role / Device Role / Timing Role: LE78D110BVC performs dual-channel codec conversion, line supervision, and GR-909-compliant loop testing while interfacing with LE77D11 VoSLIC for analog line driving. Use Value: Eliminates discrete supervisory circuitry and external tone generators, reducing BOM count by 12 components and enabling single-chip BORSCHT for cost-sensitive broadband CPE. |
Use Scenario: Cable network interface unit providing telephony service over HFC infrastructure with DOCSIS 3.0 backhaul. IC Role / Device Role / Timing Role: LE78D110BVC executes real-time DTMF detection, caller ID decoding, and adaptive echo cancellation synchronized to 8 kHz PCM frames from cable modem MAC layer. Use Value: Supports Type II caller ID delivery and 2100 Hz fax tone detection required for North American cable telephony certification - validated per SCTE-152. |
| Fiber-to-the-Home Terminal | Smart Residential Gateway |
Use Scenario: FTTH optical network terminal delivering voice, data, and IPTV with integrated battery backup for emergency calling. IC Role / Device Role / Timing Role: LE78D110BVC manages dual-line loop supervision during AC power loss using LE77D11's switching regulator support, maintaining GR-909 fault detection integrity. Use Value: Enables uninterrupted line testing and off-hook detection during brownout conditions - critical for E911 compliance in battery-backed ONTs. |
Use Scenario: Multi-service home gateway combining Wi-Fi 6, USB 3.0, and dual-line VoIP with smart home integration (Zigbee/Thread). IC Role / Device Role / Timing Role: LE78D110BVC provides programmable two-wire AC impedance matching and transhybrid balance optimized for variable DSL line lengths (2000 ft, 26 AWG). Use Value: Achieves >42 dB sidetone suppression and <−65 dBm noise floor across 300–3400 Hz band - meeting ITU-T G.168 echo cancellation requirements for residential use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voice line codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LE78D110VC | Identical functionality and pinout; differs only in RoHS compliance - LE78D110BVC uses green package per Directive 2002/95/EC, LE78D110VC does not specify RoHS status | Both support identical VoIP/cable/FTTH applications; LE78D110BVC required for EU market shipments post-RoHS enforcement | Select LE78D110BVC for new designs targeting CE-marked products; LE78D110VC remains viable for legacy industrial deployments without RoHS mandates |
| Si3217x Series (e.g., Si32176) | Single-channel device with integrated SLIC; requires two units for dual-line operation; supports IEEE 1588 PTP timing but lacks GR-909 self-test automation | Better suited for space-constrained single-line designs; lacks native GR-909 drop test reporting and requires external microcontroller for fault interpretation | Choose Si32176 when board area is critical and GR-909 automated pass/fail reporting is not required; LE78D110BVC preferred where regulatory test traceability is mandatory |
Compared with LE78D110VC, LE78D110BVC adds documented RoHS compliance without functional change; versus Si32176, it delivers integrated dual-channel VoSLAC with hardware-accelerated GR-909 testing - reducing firmware development effort and external component count by 30% in certified VoIP gateway designs.
Availability
LE78D110BVC is available at Aetrix Electronics and suitable for Voice over IP gateways, cable telephony NIUs, and fiber-to-the-home terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for LE78D110BVC 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
Zarlink Semiconductor was a fabless provider specializing in mixed-signal ICs for communications infrastructure, acquired by Microsemi in 2011 and later integrated into Microchip Technology. Its voice chipset portfolio enabled early VoIP and broadband telephony adoption.
The LE78D110BVC belongs to the VE770 series VoSLAC product line, engineered specifically for software-configurable, dual-line BORSCHT implementation in integrated access devices - emphasizing reduced system cost, minimal external components, and regulatory test automation.
FAQ
What is the primary function of the LE78D110BVC in a VoIP gateway design?
The LE78D110BVC serves as the digital signal processing core for dual-line BORSCHT functions - performing A-law/µ-law/ADPCM codec conversion, real-time line supervision (off-hook/ring-trip/fault), DTMF/FSK detection, and adaptive echo cancellation. It interfaces directly with Zarlink VoSLIC devices like LE77D11 to form a complete voice line circuit, eliminating need for discrete tone generators or external test circuitry in LE78D110BVC-based designs.
Does the LE78D110BVC require an external microcontroller to operate?
Yes, the LE78D110BVC requires an external microcontroller for initialization, configuration, and runtime control via its Microprocessor Interface (MPI) or General Circuit Interface (GCI). It does not contain embedded firmware or boot ROM; all programmable parameters (e.g., ringing waveform, impedance, gain) are loaded at startup using VoicePath™ API commands sent over MPI or GCI - making the microcontroller essential for LE78D110BVC operation.
How does the LE78D110BVC support GR-909 compliance?
The LE78D110BVC implements hardware-accelerated GR-909 drop testing including Hazardous Potential, Foreign Electromotive Force, Resistive Faults, Ringers Test, and Loop Length measurement - with automatic pass/fail reporting. These tests execute autonomously using internal ADCs and comparators, requiring no external test equipment. Results are accessible via MPI/GCI registers, enabling LE78D110BVC-based systems to meet Telcordia GR-909 certification requirements without additional test hardware.
What are the supported digital interface modes for the LE78D110BVC?
The LE78D110BVC supports two mutually exclusive digital interface modes: PCM/MPI (separate voice and control paths using PCLK/FS/DXA/DRA pins) and GCI (combined voice/control on DD/DU bus with 8-channel framing). Mode selection is automatic at power-up based on clock detection - 48+ DCL cycles between FSC edges triggers GCI entry; MPI command sequence forces reversion to PCM/MPI. Both modes are fully supported in LE78D110BVC operation.
Is the LE78D110BVC pin-compatible with other devices in the LE78D11 family?
Yes, the LE78D110BVC is pin-compatible with LE78D110VC - sharing identical 44-pin TQFP footprint, pin assignments, and electrical characteristics. The sole difference is RoHS-compliant green packaging in LE78D110BVC per Directive 2002/95/EC, while LE78D110VC documentation does not specify RoHS status. No PCB layout changes are needed when migrating from LE78D110VC to LE78D110BVC.
LE78D110BVC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Voice Over IP Processor
- Interface:
- PCM
- Number of Circuits:
- 1
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TQFP (10x10)
LE78D110BVC FAQ
1.How can I place an order for LE78D110BVC through Aetrix?
Please submit a Request for Quotation (RFQ) for LE78D110BVC 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 LE78D110BVC reliable?
The price and inventory of LE78D110BVC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LE78D110BVC is usually 5 days.
3.What payment methods are accepted for LE78D110BVC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LE78D110BVC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LE78D110BVC?
LE78D110BVC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LE78D110BVC 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 LE78D110BVC?
For technical support, including LE78D110BVC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LE78D110BVC requirements.
6.How does Aetrix verify that LE78D110BVC is sourced from the original manufacturer or authorized distributors?
All LE78D110BVC 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 LE78D110BVC meets industry standards.
7.What is the process for return or replacement of LE78D110BVC?
All LE78D110BVC units undergo pre-shipment inspection (PSI). If there is an issue with LE78D110BVC, 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 LE78D110BVC part is unused and in its original packaging.
Return procedure for LE78D110BVC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LE78D110BVC Tags
-
LMC567CMX/NOPB
Texas Instruments
-
LM567CMX/NOPB
Texas Instruments
-
LM567CM/NOPB
Texas Instruments
-
VSC8531XMW-02
Microchip Technology
-
VSC8531XMW-05
Microchip Technology
-
GPY115C0VI
MaxLinear, Inc.
-
SI32185-A-FMR
Skyworks Solutions Inc.
-
VSC8541XMV-05
Microchip Technology
-
SI32178-B-FM1R
Skyworks Solutions Inc.
-
GPY215C0VI
MaxLinear, Inc.
-
CPC7514ZTR
Littelfuse Inc.
-
VSC8502XML-03
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
