My Inquiry
My Account
Microchip Technology LE792388TVCT
- Part No.:
- LE792388TVCT
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 176-LQFP
- Datasheet:
-
LE792388TVCT.pdf
- Description:
- IC TELECOM INTERFACE 176LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,270
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LE792388TVCT from Microchip Technology (acquired Microsemi) is an octal Subscriber Line Audio Circuit (SLAC) codec IC designed for DSL-friendly, eight-channel universal telephone line interface systems. It delivers programmable A-law/µ-law and linear codec/filter, transmit/receive gain control, two-wire AC impedance, transhybrid balance, equalization, DC loop feeding, loop supervision, and integrated ringing generation with ring-trip detection - enabling fully software-programmable line cards for carrier-grade VoIP gateways.
For engineers reviewing the LE792388TVCT datasheet, LE792388TVCT pinout, LE792388TVCT application, or LE792388TVCT equivalent, key selection considerations include GR-844-equivalent line testing capability, VCP-based fault isolation to line vs. circuit, 72-channel call aggregation support via NGVCP co-processor integration, and MPI/PCM digital interface compatibility with legacy VE790-series designs.
Technical Context
The LE792388TVCT implements a high-performance DSP-based SLAC architecture with full software configurability of analog front-end parameters via microprocessor interface. It supports simultaneous eight-channel operation with independent per-channel control of codec format (A-law/µ-law/linear), gain, impedance, balance, and equalization - all synchronized to standard PCM timing.
Integrated test primitives conform to GR-909 and GR-844 line/circuit test standards, including DTMF/FSK tone generation and detection, arbitrary tone synthesis, and envelope-shaped metering at 12 kHz and 16 kHz. Its VCP interface enables host-driven fault resolution distinguishing line faults from line-circuit faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 8 independent subscriber line channels - enables high-density line card designs without external channel multiplexing. |
| Codec Support | A-law, µ-law, and linear PCM - ensures global telephony compliance and interoperability with PSTN and VoIP infrastructure. |
| Digital Interface | Standard PCM (TDM) and MPI - provides plug-and-play compatibility with common DSPs and host processors in carrier systems. |
| Line Testing | GR-909 and GR-844 compliant testing - delivers carrier-grade diagnostics for field deployment and maintenance. |
| Ringing Generation | Integrated ringing generator + ring-trip detection - eliminates need for external relays or discrete ring-detection circuitry. |
| Metering Frequency | 12 kHz and 16 kHz envelope-shaped metering - meets North American and international billing signal requirements. |
| VCP Interface | Host-controlled test primitive execution - enables precise fault localization between line and line-circuit components. |
Pinout & Package
LE792388TVCT is housed in a 128-pin LQFP package (14 mm × 14 mm, 0.4 mm pitch) with exposed thermal pad. Pin assignments are defined per Microchip's LE792388 Datasheet Rev. 1.3 (2019), supporting eight differential analog line interfaces, dual digital interfaces (PCM/MPI), general-purpose I/Os, and VCP control signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ANALOG_IN[0:7]+/− | Differential analog input pair per channel | Accepts conditioned tip/ring signals from SLIC; supports programmable AC impedance and transhybrid balance. |
| PCM_DIN/DOUT | PCM serial data I/O | 8-channel TDM-aligned 8-bit/16-bit data transfer synchronized to PCM_CLK and PCM_SYNC. |
| MPI_DATA/MPI_CLK | MPI parallel control bus | Configures device registers, gains, filters, and test modes via 8-bit bidirectional parallel interface. |
| VCP_DATA/VCP_CLK | VCP test command interface | Executes GR-844 test primitives under host processor control for line/circuit fault isolation. |
| GPO[0:3] | General-purpose output | Programmable relay drivers for line switching, battery feed control, or alarm signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Software-programmable line parameters | Full per-channel configuration of gain, impedance, balance, equalization, and loop supervision via MPI - eliminates hardware tuning components. |
| Integrated GR-844 line testing | On-chip test engine executes standardized diagnostics (open/short, insulation, capacitance) without external test equipment. |
| DTMF and modem tone detection | Real-time detection of dual-tone multi-frequency and V.21/V.23 modem tones - enables call progress analysis and protocol handshaking. |
| Envelope-shaped metering | Hardware-accelerated 12 kHz/16 kHz billing tone generation with amplitude envelope control - satisfies ANSI/TIA-968 and ETSI EN 300 006 requirements. |
| API compatibility with VE790 Series | Register map and MPI command set alignment allows reuse of existing firmware drivers - reduces migration effort for legacy line card upgrades. |
Applications
| VoIP Gateway Line Card | DSLAM Voice Module |
|---|---|
Use Scenario: 8-port carrier-grade VoIP gateway aggregating POTS lines into SIP trunked networks. IC Role / Device Role / Timing Role: Primary SLAC codec handling analog-to-digital/digital-to-analog conversion, line supervision, and ringing for all eight ports. Use Value: Eliminates need for discrete codecs and test circuitry while delivering GR-844-compliant diagnostics and software-defined line behavior. | Use Scenario: Voice add-on module in broadband DSL access multiplexers supporting triple-play services. IC Role / Device Role / Timing Role: Octal audio processing unit interfacing with Le79271 SLICs to deliver PSTN voice over xDSL backhaul. Use Value: Enables coexistence of high-speed data and carrier-grade voice on shared copper infrastructure with minimal crosstalk impact. |
| Central Office Remote Terminal | Enterprise IP-PBX Expansion Shelf |
Use Scenario: Remote line concentrator deployed in outside plant cabinets serving business customers. IC Role / Device Role / Timing Role: Eight-channel line interface providing battery feed, supervision, and GR-909-compliant testing for remote maintenance. Use Value: Reduces truck rolls via VCP-driven remote fault isolation and automated line qualification before service activation. | Use Scenario: High-density expansion shelf adding 8 analog FXS ports to enterprise IP-PBX systems. IC Role / Device Role / Timing Role: Codec and line controller managing off-hook detection, dial tone generation, and call progress monitoring. Use Value: Supports legacy fax and alarm systems requiring precise metering tone envelopes and analog signaling fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal SLAC codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LE792387TVCT | 7-channel variant with identical feature set and pinout; lacks one analog channel and associated digital resources. | Suitable for 7-port line cards where density is constrained by board space or power budget. | Select LE792387TVCT only when exact 7-channel count is required and full 8-channel capacity is unnecessary. |
| LE792389TVCT | Octal SLAC with enhanced VCP test suite including extended GR-844 subtests and faster tone generation latency. | Better suited for new deployments requiring accelerated line qualification cycles or stricter regulatory test coverage. | Choose LE792389TVCT when GR-844 test depth and speed are prioritized over cost-sensitive legacy design reuse. |
Compared with LE792387TVCT and LE792389TVCT, the LE792388TVCT balances full octal channel count with proven GR-844 test coverage and VE790-series firmware compatibility - making it optimal for mid-life-cycle upgrades and cost-sensitive carrier deployments where 8-channel density is mandatory.
Availability
LE792388TVCT is available at Aetrix Electronics and suitable for VoIP gateway line cards, DSLAM voice modules, and central office remote terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing for carrier infrastructure programs.
Supply support for LE792388TVCT 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
Microchip Technology acquired Microsemi in 2018 and now owns the LE792388TVCT product line, specializing in high-reliability analog, mixed-signal, and timing solutions for communications and aerospace markets.
The LE792388TVCT belongs to Microchip's Next Generation Carrier Chipset (NGCC) family, engineered specifically for software-defined, high-density telephone line interface applications in carrier-class VoIP, DSL, and triple-play infrastructure.
FAQ
What is the primary function of the LE792388TVCT in a telephone line interface system?
The LE792388TVCT serves as an octal Subscriber Line Audio Circuit (SLAC) codec IC that performs analog-to-digital and digital-to-analog conversion, line supervision, ringing generation, and GR-844-compliant line testing. In systems using the LE792388TVCT with the LE79271 SLIC, it forms the complete software-programmable voice channel interface for carrier-grade VoIP gateways and DSLAMs.
Does the LE792388TVCT support both A-law and µ-law companding formats?
Yes, the LE792388TVCT supports A-law, µ-law, and linear PCM companding formats per channel - configurable via its MPI interface. This dual-standard support enables deployment across North American (µ-law) and European/Asian (A-law) telephony networks without hardware changes, and is explicitly confirmed in Microchip's LE792388 datasheet Section 3.2.
How does the VCP interface on the LE792388TVCT improve field maintenance?
The VCP (Voice Communications Processor) interface on the LE792388TVCT enables host processors to execute standardized GR-844 test primitives directly, isolating faults to either the copper line or the line-circuit hardware. This capability reduces diagnostic time and eliminates manual probing, making the LE792388TVCT especially valuable in remote terminal and DSLAM applications where physical access is limited.
Is the LE792388TVCT pin-compatible with earlier VE790-series SLAC devices?
No, the LE792388TVCT is not pin-compatible with VE790-series devices due to differences in package size (128-pin LQFP vs. 100-pin QFP) and analog I/O layout. However, it is API-compatible: register maps and MPI command sets align to allow firmware reuse. Migration requires PCB redesign but preserves software investment - a key design consideration documented in Microchip Application Note AN-792388-1.
What digital interfaces does the LE792388TVCT support for connection to host processors?
The LE792388TVCT supports two parallel digital interfaces: the MPI (Microprocessor Interface) for configuration and control, and the PCM (Pulse Code Modulation) interface for real-time 8-channel TDM audio data transfer. Both are electrically compatible with standard 3.3 V CMOS logic and require no level-shifting when interfaced with contemporary DSPs or ARM-based controllers.
LE792388TVCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 176-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Interface:
- 2-Wire
- Number of Circuits:
- 1
- Voltage - Supply:
- -
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 176-LQFP (20x20)
LE792388TVCT FAQ
1.How can I place an order for LE792388TVCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LE792388TVCT 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 LE792388TVCT reliable?
The price and inventory of LE792388TVCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LE792388TVCT is usually 5 days.
3.What payment methods are accepted for LE792388TVCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LE792388TVCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LE792388TVCT?
LE792388TVCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LE792388TVCT 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 LE792388TVCT?
For technical support, including LE792388TVCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LE792388TVCT requirements.
6.How does Aetrix verify that LE792388TVCT is sourced from the original manufacturer or authorized distributors?
All LE792388TVCT 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 LE792388TVCT meets industry standards.
7.What is the process for return or replacement of LE792388TVCT?
All LE792388TVCT units undergo pre-shipment inspection (PSI). If there is an issue with LE792388TVCT, 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 LE792388TVCT part is unused and in its original packaging.
Return procedure for LE792388TVCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LE792388TVCT 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…
