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Microchip Technology LE9622RQCT
- Part No.:
- LE9622RQCT
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 53-VFQFN Exposed Pad
- Datasheet:
-
LE9622RQCT.pdf
- Description:
- IC TELECOM INTERFACE 53QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LE9622RQCT from Microsemi is a dual-channel Subscriber Line Interface Circuit (SLIC) implementing full BORSCHT functionality for VoIP FXS applications. It delivers 60 Vrms ringing into 5 REN using patented Shared Buck-Boost Automatic Battery Switch (BBABS) and supports 70 Vrms ringing via Multi-Line Inverting Boost ABS, with programmable PCM/SPI interface voltage (1.8V/2.5V/3.3V) and wideband/narrowband codec operation.
For engineers reviewing the LE9622RQCT datasheet, LE9622RQCT pinout, LE9622RQCT application, or LE9622RQCT equivalent, this device is selected for multi-channel enterprise gateways, DSL/cable eMTAs, and FTTx SFUs requiring programmable DC feed, adaptive ringing, transhybrid balancing, and VeriVoice-certified loop diagnostics per Telcordia GR-909-CORE.
Technical Context
The LE9622RQCT integrates two independent SLIC channels with fully programmable AC/DC line parameters-including impedance synthesis, frequency response correction, and gain adjustment-enabling compliance with global telephony standards. Its dual switching regulator architecture supports both BBABS (up to 60 Vrms) and Multi-Line Inverting Boost ABS (up to 70 Vrms), each optimized for energy efficiency and RoHS-compliant broadband equipment.
Control is implemented via configurable PCM or SPI interfaces, with time-slot assignment and host processor voltage compatibility across 1.8V, 2.5V, and 3.3V logic families. Voice signal processing includes wideband clarity, A-law/µ-law coding, and real-time subscriber line testing using VeriVoice Professional software aligned with TIA-1063 and Telcordia GR-909-CORE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual independent FXS lines with full BORSCHT functionality |
| Ringing Voltage (BBABS) | 60 Vrms into 5 REN load; enables low-power, energy-efficient ringing per Code of Conduct |
| Ringing Voltage (ABS) | 70 Vrms into 5 REN load; supports higher-voltage legacy line conditions |
| Interface | Programmable PCM or SPI; supports 1.8V/2.5V/3.3V SoC I/O voltage levels |
| Codec Modes | Narrowband (G.711 A-law/µ-law) and wideband (G.722) operation with programmable bandwidth |
| Regulator Topology | Dual topology: Shared Buck-Boost ABS + Multi-Line Inverting Boost ABS |
| Compliance | Telcordia GR-909-CORE and TIA-1063 subscriber loop test support via VeriVoice suite |
Pinout & Package
LE9622RQCT is housed in a 53-pin QFN package (7 mm × 7 mm, 0.4 mm pitch), RoHS-compliant and thermally optimized for high-density voice gateway PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TIPD1, RINGD1 | Channel 1 differential line drivers | High-voltage analog outputs driving tip/ring of first FXS line |
| TIPD2, RINGD2 | Channel 2 differential line drivers | High-voltage analog outputs driving tip/ring of second FXS line |
| DIN, DOUT, DCLK, CS, INT | SPI interface signals | Enable register-level configuration and status reporting with interrupt-driven supervision |
| FS, PCLK, DXA, DRA | PCM interface signals | Support time-division multiplexed voice data transfer at standard TDM rates |
| VBL1, VBL2 | Battery voltage inputs | Accept boosted or buck-boost derived battery rails for each channel's line driver stage |
| IHL1, IHL2 | Hook-switch current sense | Analog current monitoring for on-hook/off-hook detection on each line |
Key Features
| Feature | Design Value |
|---|---|
| Patented BBABS topology | Reduces power consumption and heat dissipation during ringing while maintaining 60 Vrms output |
| Multi-Line Inverting Boost ABS | Enables 70 Vrms ringing without external boost converters, simplifying BOM for long-loop deployments |
| Programmable impedance synthesis | Allows dynamic matching to diverse loop lengths and cable types without hardware changes |
| VeriVoice Professional integration | Provides factory-ready, standards-compliant loop diagnostics including ring trip, hook detection, and metering pulse validation |
| Wideband voice path (G.722) | Delivers 50–7000 Hz audio bandwidth for HD voice clarity in modern VoIP deployments |
Applications
| DSL Residential Gateways | Cable eMTAs |
|---|---|
Use Scenario: Integrated voice service in single-family broadband gateways with 2 FXS ports. IC Role / Device Role / Timing Role: Dual-channel SLIC providing BORSCHT functions, ringing generation, and loop supervision. Use Value: Enables carrier-grade voice service with Telcordia-compliant diagnostics and 70 Vrms ringing for long-loop support. | Use Scenario: Embedded multimedia terminal adapter delivering VoIP over HFC networks. IC Role / Device Role / Timing Role: Programmable FXS interface handling DC feed, signaling, and wideband voice encoding. Use Value: Supports simultaneous narrowband (G.711) and wideband (G.722) codecs for flexible service tiering. |
| PON Single Family Units (SFUs) | Fiber to the Premise (FTTx) |
Use Scenario: GPON/EPON endpoint delivering voice service in fiber-fed homes. IC Role / Device Role / Timing Role: Low-power dual SLIC managing battery switching, ringing, and subscriber line testing. Use Value: Meets energy consumption Code of Conduct requirements while supporting 60 Vrms BBABS ringing. | Use Scenario: Central office or remote node voice termination for FTTH/FTTB deployments. IC Role / Device Role / Timing Role: High-reliability SLIC with dual regulator topologies for varying line impedances and loop lengths. Use Value: Field-proven VeriVoice Manufacturing Test Package (VVMT) ensures production-line yield and consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si32260-A-GM | Single-channel SLIC with integrated DC-DC; no BBABS topology; max 65 Vrms ringing | Requires two devices for dual-FXS; lacks VeriVoice-certified diagnostics stack | Preferred where board space allows discrete channel scaling and lower ringing voltage suffices |
| LE9641RQCT | Quad-channel SLIC in same 53-pin QFN; shares BBABS/ABS architecture and VeriVoice support | Higher port density; identical software ecosystem but larger thermal footprint per channel | Optimal for 4-port enterprise gateways needing footprint reuse and unified firmware maintenance |
Compared with Si32260-A-GM and LE9641RQCT, the LE9622RQCT uniquely balances dual-channel integration, 70 Vrms ABS capability, and embedded VeriVoice diagnostics-making it optimal for cost-sensitive 2-port broadband gateways requiring field-deployable loop test compliance.
Availability
LE9622RQCT is available at Aetrix Electronics and suitable for DSL residential gateways, cable eMTAs, and PON SFUs requiring stable component supply, long-lifecycle support, and RoHS-compliant voice interface solutions.
Supply support for LE9622RQCT 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
Microsemi Corporation (now part of Microchip Technology) is a semiconductor company specializing in high-reliability analog and mixed-signal ICs for communications, aerospace, defense, and industrial markets.
The LE9622RQCT belongs to the miSLIC™ Series of programmable SLICs, designed specifically for cost-optimized, energy-efficient VoIP gateway platforms requiring full BORSCHT functionality and standards-compliant subscriber line testing.
FAQ
What is the maximum ringing voltage supported by the LE9622RQCT?
The LE9622RQCT supports two distinct ringing topologies: up to 60 Vrms using the patented Shared Buck-Boost Automatic Battery Switch (BBABS), and up to 70 Vrms using the Multi-Line Inverting Boost Automatic Battery Switch (ABS). Both are validated into a 5 REN load and enable compliance with regional telephony requirements for long-loop deployments. The LE9622RQCT allows runtime selection between these modes via SPI or PCM configuration.
Does the LE9622RQCT support wideband voice operation?
Yes, the LE9622RQCT supports wideband (HD) voice operation in G.722 codec mode, delivering 50–7000 Hz audio bandwidth with low distortion and programmable frequency response correction. This capability is implemented in the integrated Voice Signal Processor and complements narrowband G.711 A-law/µ-law operation-all configurable via the VoicePath SDK and VP-API-II software framework included with the LE9622RQCT.
How does the LE9622RQCT handle subscriber line diagnostics?
The LE9622RQCT integrates comprehensive subscriber line diagnostics through VeriVoice Professional Test Suite software, enabling automated testing per Telcordia GR-909-CORE and TIA-1063 standards. Functions include ring trip detection, switch hook monitoring, metering pulse validation, and loop resistance measurement-all executed without external test equipment. The LE9622RQCT provides dedicated ADC channels and digital supervision logic to support these features directly in firmware.
What interface options does the LE9622RQCT offer for host processor communication?
The LE9622RQCT offers dual host interface options: a time-division multiplexed PCM interface compatible with standard TDM buses, and a 4-wire SPI interface supporting Mode 3 timing. Both interfaces are voltage-programmable for 1.8V, 2.5V, or 3.3V logic levels, allowing seamless integration with diverse SoCs and DSPs. Configuration registers, line state control, and diagnostic results are accessible via either interface, with SPI preferred for initialization and PCM for real-time voice data transfer.
Is the LE9622RQCT pin-compatible with other devices in the miSLIC™ family?
No, the LE9622RQCT is not pin-compatible with other miSLIC™ devices such as the LE9641RQCT (quad-channel) or LE9632RQCT (single-channel), despite sharing the same 53-pin QFN package footprint. Pin assignments for line drivers, regulators, and interface signals differ significantly across the family to accommodate channel count and feature set variations. Board layout must be designed specifically for the LE9622RQCT, referencing its official pinout diagram (Figure 36 in the preliminary datasheet).
LE9622RQCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- miSLIC™
- Package/Case:
- 53-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Subscriber Line Interface Concept (SLIC)
- Interface:
- PCM, SPI
- Number of Circuits:
- 1
- Voltage - Supply:
- 1.8V, 2.5V, 3.3V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 53-QFN (7x7)
LE9622RQCT FAQ
1.How can I place an order for LE9622RQCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LE9622RQCT 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 LE9622RQCT reliable?
The price and inventory of LE9622RQCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LE9622RQCT is usually 5 days.
3.What payment methods are accepted for LE9622RQCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LE9622RQCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LE9622RQCT?
LE9622RQCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LE9622RQCT 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 LE9622RQCT?
For technical support, including LE9622RQCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LE9622RQCT requirements.
6.How does Aetrix verify that LE9622RQCT is sourced from the original manufacturer or authorized distributors?
All LE9622RQCT 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 LE9622RQCT meets industry standards.
7.What is the process for return or replacement of LE9622RQCT?
All LE9622RQCT units undergo pre-shipment inspection (PSI). If there is an issue with LE9622RQCT, 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 LE9622RQCT part is unused and in its original packaging.
Return procedure for LE9622RQCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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