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Infineon Technologies PBL38650/2QNA
- Part No.:
- PBL38650/2QNA
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
PBL38650/2QNA.pdf
- Description:
- IC TELECOM INTERFACE PLCC-28
- Quantity:
- Payment:
- Shipping:
Inventory:1,753
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Product details
Overview
PBL38650/2QNA from Infineon Technologies is a FlexiSLIC™ Subscriber Line Interface Circuit (SLIC) designed for analog telephony line interface in voice-over-DSL, VoIP gateways, and IP-PBX systems. It provides programmable two-wire signal headroom (2.2 Vrms), selectable transmit gain (0.5× or 0.25×), 43 V open-loop voltage at −48 V battery feed, on-hook transmission capability, and analog overtemperature protection with continued operation during thermal guard activation.
For engineers reviewing the PBL38650/2QNA datasheet, PBL38650/2QNA pinout, PBL38650/2QNA application, or PBL38650/2QNA equivalent, key selection criteria include programmable overhead voltage (POV), longitudinal balance (>60 dB), loop current detection, ground key/tip open state monitoring, and compatibility with SICOFI®4 codec interfaces in multi-channel SLIC designs.
Technical Context
The PBL38650/2QNA integrates full-duplex hybrid functionality with programmable two-wire to four-wire gain (−3.5 dB or −9.5 dB), four-wire to two-wire gain (−3.5 dB or −9.5 dB), and four-wire to four-wire gain (0 dB). Its battery feed circuit delivers constant loop voltage up to 43 V open-loop while tracking VBAT and maintaining ≤5 mA leakage tolerance.
It implements analog temperature guard with active transmission retention, supports polarity reversal and ring trip detection, and features no power-up sequence requirement. Control logic uses three-state inputs (C3/C2/C1) to select eight operating states including ringing, active, tip open, and ground key detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Two-wire signal headroom | Programmable to 2.2 Vrms - enables precise metering compliance in analog line testing and supervision circuits. |
| Open-loop voltage | 43 V at −48 V battery feed - ensures sufficient line driving margin for long-loop (>5 km) POTS line conditions. |
| Longitudinal balance | >60 dB - suppresses common-mode noise and improves echo cancellation performance in hybrid circuits. |
| On-hook power dissipation | 70 mW in active state - minimizes thermal load during standby while retaining full monitoring capability. |
| Transmit gain options | 0.5× or 0.25× - selectable via external resistor configuration to match codec input sensitivity and line impedance. |
| Loop current detection | Integrated analog comparator - enables real-time off-hook detection without external sensing components. |
| Thermal protection | Analog overtemperature guard with continued transmission - avoids call drop during thermal stress events. |
Pinout & Package
Package: P-/PG-SSOP-24-1 (Plastic Shrink Small Outline Package), 24-pin, 0.635 mm pitch, body size 8.2 mm × 5.3 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Connects to +5 V rail; powers internal bias and control logic. |
| GND | Ground reference | Common return for analog and digital sections; requires low-inductance layout. |
| TIPX | Two-wire TIP output | Drives TIP line with programmable headroom; connects to transformer center-tap or line interface network. |
| RINGX | Two-wire RING output | Drives RING line with matched amplitude and phase to TIPX for balanced line drive. |
| VTRO | Two-wire receive output | Delivers received analog signal to codec; includes programmable gain and DC offset compensation. |
| VTXO | Four-wire transmit output | Accepts codec transmit signal; feeds hybrid circuit with configurable gain and AC coupling path. |
| C3, C2, C1 | State control inputs | Three-bit binary selects SLIC operating mode (e.g., ringing = 001, active = 011). |
| RSN | Current sense feedback | Monitors loop current via external resistor; enables closed-loop battery feed regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable overhead voltage (POV) | Adjustable via external resistor divider to set VTRO headroom precisely for metering accuracy. |
| No power-up sequence required | Enables immediate line interface readiness after power application-critical for fast-boot VoIP gateways. |
| Constant loop voltage regulation | Maintains stable line voltage across leakage currents up to 5 mA, supporting degraded line conditions. |
| Ground key and tip open detection | Dedicated analog comparators provide reliable supervision signals without MCU polling overhead. |
| High/low battery automatic switching | Seamlessly transitions between primary and backup battery sources without interrupting service. |
Applications
| Voice-over-DSL Gateways | IP-PBX Systems |
|---|---|
|
Use Scenario: Multi-line residential gateway connecting POTS phones to DSL broadband infrastructure. IC Role / Device Role / Timing Role: SLIC providing line feed, hybrid, supervision, and codec interface for each analog port. Use Value: Enables simultaneous on-hook transmission and loop monitoring-reducing need for separate supervisory ICs and lowering BOM count. |
Use Scenario: Rack-mounted enterprise IP-PBX supporting 24–48 analog extensions with centralized battery backup. IC Role / Device Role / Timing Role: Primary line interface IC handling battery feed, ringing generation, and polarity reversal per channel. Use Value: Programmable POV and selectable gain allow calibration across diverse handset impedances and cable lengths without hardware change. |
| VoIP Analog Telephony Adapters (ATA) | Remote Access Concentrators |
|
Use Scenario: Single-port ATA converting PSTN lines to SIP endpoints in remote office deployments. IC Role / Device Role / Timing Role: Full-function SLIC managing line state, ring detection, and analog signal conditioning. Use Value: Analog overtemperature guard permits uninterrupted voice calls during sustained high-temperature operation in unventilated enclosures. |
Use Scenario: Carrier-grade concentrator aggregating 120+ analog lines into DSLAM backhaul. IC Role / Device Role / Timing Role: High-reliability SLIC with longitudinal balance >60 dB and close-tolerance current feeding. Use Value: Maintains echo return loss (ERL) compliance across all channels under varying temperature and aging conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si3217x (Skyworks) | Digital-configurable via SPI; higher integration (integrated DC-DC); no analog temperature guard with active transmission. | Requires firmware initialization; better suited for software-defined line card architectures. | Select when digital configurability and integrated power conversion outweigh need for analog thermal resilience. |
| LE89316 (ON Semiconductor) | Fixed 2.0 Vrms headroom; lower open-loop voltage (38 V); lacks tip open state detection. | Targeted at cost-sensitive single-line devices with shorter loop requirements. | Select only for short-loop (<3 km), non-critical thermal environments where reduced feature set is acceptable. |
Compared with Si3217x and LE89316, the PBL38650/2QNA uniquely combines analog thermal guard with live transmission, programmable POV for metrology-grade headroom, and dedicated tip open/ground key supervision-making it optimal for carrier-grade VoIP gateways requiring zero-interruption line monitoring.
Availability
PBL38650/2QNA is available at Aetrix Electronics and suitable for voice-over-DSL gateways, IP-PBX systems, and VoIP analog telephony adapters requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.
Supply support for PBL38650/2QNA 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, industrial, and communications ICs, with global R&D and manufacturing infrastructure.
The FlexiSLIC™ product line was developed specifically for high-reliability analog telephony line interface in carrier-class VoIP infrastructure, emphasizing programmability, thermal resilience, and supervision accuracy over legacy SLIC constraints.
FAQ
What is the purpose of the POV (Programmable Overhead Voltage) function?
The POV function sets the peak-to-peak headroom on the VTRO output to ensure accurate 2.2 Vrms metering compliance. It is configured using an external resistor divider on the POV pin and directly determines the maximum undistorted analog receive signal level delivered to the codec, critical for regulatory testing and line qualification.
Does the PBL38650/2QNA require external DC-DC conversion for battery feed?
No. The PBL38650/2QNA uses an internal linear battery feed architecture that accepts −48 V input and regulates loop voltage without requiring external DC-DC converters. It tracks VBAT to maintain constant loop voltage up to 43 V open-loop, simplifying power design in multi-SLIC line cards.
How does the analog temperature guard differ from digital thermal shutdown?
The analog temperature guard reduces bias current gradually above threshold while maintaining full SLIC functionality-including on-hook transmission and supervision-unlike digital shutdown which halts operation entirely. This preserves call continuity during transient thermal events in enclosed chassis environments.
Can the PBL38650/2QNA operate with a −60 V battery supply?
No. Absolute maximum rating specifies −52 V for VBAT. Operation at −60 V exceeds safe limits and risks permanent damage to the internal battery feed transistors. Design must limit input to −48 V ±10% (−43.2 V to −52.8 V) per datasheet Section 3.1.
PBL38650/2QNA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FlexiSLIC™
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Subscriber Line Interface Concept (SLIC)
- Interface:
- -
- Number of Circuits:
- 1
- Voltage - Supply:
- 5V
- Current - Supply:
- 2.8mA
- Power (Watts):
- 730 mW
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- P/PG-LCC-28-3
PBL38650/2QNA FAQ
1.How can I place an order for PBL38650/2QNA through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38650/2QNA 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 PBL38650/2QNA reliable?
The price and inventory of PBL38650/2QNA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38650/2QNA is usually 5 days.
3.What payment methods are accepted for PBL38650/2QNA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38650/2QNA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38650/2QNA?
PBL38650/2QNA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38650/2QNA 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 PBL38650/2QNA?
For technical support, including PBL38650/2QNA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38650/2QNA requirements.
6.How does Aetrix verify that PBL38650/2QNA is sourced from the original manufacturer or authorized distributors?
All PBL38650/2QNA 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 PBL38650/2QNA meets industry standards.
7.What is the process for return or replacement of PBL38650/2QNA?
All PBL38650/2QNA units undergo pre-shipment inspection (PSI). If there is an issue with PBL38650/2QNA, 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 PBL38650/2QNA part is unused and in its original packaging.
Return procedure for PBL38650/2QNA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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