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Infineon Technologies PBL38640/2QNA
- Part No.:
- PBL38640/2QNA
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
PBL38640/2QNA.pdf
- Description:
- IC TELECOM INTERFACE PLCC-28
- Quantity:
- Payment:
- Shipping:
Inventory:3,307
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Product details
Overview
PBL38640/2QNA from Infineon Technologies is a FlexiSLIC™ Subscriber Line Interface Circuit (SLIC) designed for analog telephony line interface in voice-over-DSL, VoIP gateways, and ISDN terminal adapters. It delivers 43 V open-loop voltage at -48 V battery feed, supports programmable overhead voltage (POV), provides selectable transmit gain (1× or 0.5×), and operates across -40 °C to +85 °C ambient temperature.
For engineers reviewing the PBL38640/2QNA datasheet, PBL38640/2QNA pinout, PBL38640/2QNA application, or PBL38640/2QNA equivalent, key selection criteria include on-hook transmission capability, longitudinal balance >60 dB, automatic high/low battery switching, loop current detection, and analog overtemperature protection with continued transmission.
Technical Context
The PBL38640/2QNA integrates full two-wire/four-wire hybrid functionality with configurable gain paths, enabling simultaneous transmit/receive signal separation without external transformers. Its battery feed circuit maintains constant loop voltage up to 5 mA leakage current (RLeak >10 kΩ @ -48 V) and tracks Vbat dynamically.
Control logic implements eight SLIC operating states-including ringing, active polarity reversal, tip open, and ground key detection-via three digital inputs (C3/C2/C1). Analog temperature guard allows uninterrupted transmission during thermal overload, unlike shutdown-based protection schemes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Open-loop voltage | 43 V at -48 V battery feed - enables reliable line driving over long loops with standard central office voltage. |
| On-hook power dissipation | 65 mW in active state - minimizes thermal load during standby, supporting dense multi-channel designs. |
| Longitudinal balance | >60 dB - ensures effective common-mode rejection for noise immunity in noisy telecom environments. |
| Transmit gain select | 1× or 0.5× - allows flexible signal level matching to codec input ranges without external attenuation. |
| Ambient temperature range | -40 °C to +85 °C - supports deployment in uncontrolled industrial and outdoor telecom enclosures. |
| Loop current detection | Integrated analog detector - enables real-time supervision of line seizure, off-hook, and short-circuit conditions. |
| Programmable POV | Analog-adjustable overhead voltage - permits fine-tuning of headroom for varying line impedance and cable loss profiles. |
Pinout & Package
Package: P-/PG-SSOP-24-1 (Plastic Shrink Small Outline Package), 24-pin, 0.635 mm pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TIPX | Two-wire tip output | Drives TIP line with programmable headroom; supports on-hook transmission and ring trip detection. |
| RINGX | Two-wire ring output | Drives RING line; pairs with TIPX for balanced loop feed and polarity reversal control. |
| VTRX | Four-wire transmit input | Accepts codec-generated transmit signal; gain selectable via internal configuration. |
| VRRX | Four-wire receive output | Delivers hybrid-separated receive signal to codec; includes longitudinal balance optimization. |
| C3, C2, C1 | State control inputs | Three-bit binary code selects among 8 SLIC operating modes (e.g., ringing, active, tip open). |
| RSN | Current sense resistor terminal | Connects to external sense resistor for precise loop current monitoring and feedback. |
| VPOR | Programmable overhead reference | Analog input setting POV level; determines headroom margin for linear operation under load. |
| GND | Analog ground | Dedicated low-noise return path for SLIC core; isolated from digital and power grounds per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| No power-up sequence required | Enables immediate line activation after power application-eliminates boot delay and simplifies system reset design. |
| Automatic high/low battery switching | Seamlessly transitions between primary (-48 V) and backup battery sources without line interruption or state loss. |
| Analog overtemperature protection | Reduces bias current while maintaining signal path integrity-avoids hard shutdown and call drop during thermal stress. |
| Line voltage measurement capability | Provides direct analog access to loop voltage for diagnostics, fault logging, and adaptive line conditioning. |
| Ground key and ring trip detection | Integrated comparators identify ground faults and ringing signal presence-reduces need for external supervision ICs. |
Applications
| Voice-over-DSL Gateways | VoIP Residential Gateways |
|---|---|
Use Scenario: DSLAM-integrated voice gateway serving multiple analog phones over shared copper pair. IC Role / Device Role / Timing Role: SLIC providing battery feed, loop supervision, hybrid coupling, and on-hook transmission for POTS line emulation. Use Value: 43 V open-loop voltage and >60 dB longitudinal balance ensure interoperability with legacy PSTN infrastructure and noise resilience in bundled cable environments. |
Use Scenario: Home gateway connecting analog handsets to SIP-based VoIP service via integrated codec interface. IC Role / Device Role / Timing Role: Line interface managing tip/ring drive, polarity reversal, ground key detection, and programmable POV for variable line lengths. Use Value: Selectable 1×/0.5× transmit gain matches dynamic range of low-voltage codecs; analog temperature guard prevents call drops during sustained operation. |
| ISDN Terminal Adapters | Multi-line Business VoIP Systems |
Use Scenario: BRI S/T interface adapter converting ISDN signals to analog POTS lines for fax machines and alarm panels. IC Role / Device Role / Timing Role: SLIC handling loop current detection, ring trip, and tip open state to emulate mechanical switchhook behavior. Use Value: Integrated tip open state with ring ground detector replaces discrete relay+sensor circuits-reducing BOM count and PCB area. |
Use Scenario: 4–8 port VoIP PBX supporting concurrent analog extensions with centralized power management. IC Role / Device Role / Timing Role: High-efficiency SLIC delivering 65 mW on-hook dissipation and automatic battery switching for redundant power architecture. Use Value: Constant loop voltage regulation for line leakage <5 mA ensures stable off-hook detection across aging or corroded wiring in commercial buildings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LE89316B | Higher on-hook dissipation (120 mW); requires external thermal sensor; no analog POV adjustment. | Targeted at higher-density carrier-grade systems with forced-air cooling; lacks on-hook transmission mode. | Select when absolute thermal headroom exceeds 85 °C ambient and external supervisory MCU is available for state sequencing. |
| Si3226x | Digital-configurable POV and gain; integrated dc-dc converter; SPI interface; 32-pin QFN package. | Designed for software-defined line cards with firmware-based state management and dynamic parameter tuning. | Prefer for new designs requiring remote calibration, multi-vendor interoperability, or compact footprint with integrated power conversion. |
Compared with LE89316B and Si3226x, the PBL38640/2QNA offers analog-programmable headroom, zero-power-up-sequence operation, and lower on-hook dissipation-making it optimal for cost-sensitive, thermally constrained, or legacy-compatible analog telephony interfaces where deterministic analog control is prioritized over digital configurability.
Availability
PBL38640/2QNA is available at Aetrix Electronics and suitable for voice-over-DSL gateways, VoIP residential gateways, and ISDN terminal adapters requiring stable component supply, long-lifecycle support, and consistent electrical performance across temperature extremes.
Supply support for PBL38640/2QNA 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, and communications ICs, with global manufacturing and R&D centers.
The FlexiSLIC™ product line was developed specifically for analog telephony line interface in broadband access equipment, emphasizing robustness, low power, and seamless integration with legacy PSTN infrastructure.
FAQ
What is the purpose of the VPOR pin on the PBL38640/2QNA?
The VPOR pin accepts an analog voltage (0.5–2.5 V) that sets the programmable overhead voltage (POV) level, directly determining headroom margin for linear operation under varying line impedances. This enables precise adjustment of signal swing without changing external components, supporting deployment across diverse loop lengths and cable gauges.
Does the PBL38640/2QNA support true on-hook transmission?
Yes-the device supports simultaneous on-hook transmission by maintaining active hybrid function and codec interface while drawing only 65 mW. This allows diagnostic tone injection, line testing, or remote firmware updates without lifting the handset or disrupting line supervision states.
How does the analog overtemperature protection differ from digital thermal shutdown?
Unlike digital shutdown, the PBL38640/2QNA's analog overtemperature protection reduces internal bias current progressively while preserving signal path continuity. This avoids abrupt call termination and enables graceful degradation-maintaining basic line supervision and audio pass-through during thermal overload.
Can the PBL38640/2QNA operate without an external microcontroller?
Yes-it functions autonomously using only three digital control inputs (C3/C2/C1) to select among eight predefined SLIC states. No firmware, clock, or serial interface is required, making it suitable for fixed-function hardware designs with minimal control logic.
PBL38640/2QNA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FlexiSLIC™
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
PBL38640/2QNA FAQ
1.How can I place an order for PBL38640/2QNA through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38640/2QNA 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 PBL38640/2QNA reliable?
The price and inventory of PBL38640/2QNA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38640/2QNA is usually 5 days.
3.What payment methods are accepted for PBL38640/2QNA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38640/2QNA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38640/2QNA?
PBL38640/2QNA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38640/2QNA 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 PBL38640/2QNA?
For technical support, including PBL38640/2QNA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38640/2QNA requirements.
6.How does Aetrix verify that PBL38640/2QNA is sourced from the original manufacturer or authorized distributors?
All PBL38640/2QNA 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 PBL38640/2QNA meets industry standards.
7.What is the process for return or replacement of PBL38640/2QNA?
All PBL38640/2QNA units undergo pre-shipment inspection (PSI). If there is an issue with PBL38640/2QNA, 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 PBL38640/2QNA part is unused and in its original packaging.
Return procedure for PBL38640/2QNA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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