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Lantiq PBL38640/2SOA
- Part No.:
- PBL38640/2SOA
- Manufacturer:
- Lantiq
- Category:
- Telecom
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PBL38640/2SOA.pdf
- Description:
- FLEXISLIC SUBSCRIBER LINE INTERF
- Quantity:
- Payment:
- Shipping:
Inventory:5,696
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Product details
Overview
PBL38640/2SOA 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 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 PBL38640/2SOA datasheet, PBL38640/2SOA pinout, PBL38640/2SOA application, or PBL38640/2SOA equivalent, key selection criteria include on-hook transmission capability, longitudinal balance >60 dB, automatic high/low battery switching, analog overtemperature protection with continued transmission, and SSOP-24 package compatibility with legacy telephony PCB layouts.
Technical Context
The PBL38640/2SOA integrates full two-wire loop feed, hybrid function, codec receive interface, and relay driver in a single IC. It implements analog-based battery feed control with close-tolerance current regulation and programmable signal headroom via POV configuration, enabling stable operation under varying line leakage conditions (RLeak > 10 kΩ).
Its SLIC operating states-including open circuit, ringing, active, tip open, and polarity reversal-are controlled by three digital inputs (C3/C2/C1). The device features analog temperature guard that permits continued transmission during thermal events, and includes dedicated detectors for ground key, ring trip, and loop current monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Open-loop voltage | 43 V at -48 V battery feed - ensures sufficient headroom for long-loop (>5 km) analog line operation |
| On-hook power dissipation | 65 mW in active state - enables low-thermal-footprint deployment in dense gateway chassis |
| Longitudinal balance | >60 dB - minimizes common-mode noise coupling into four-wire codec path |
| Operating temperature | -40 °C to +85 °C - supports industrial-grade deployment in uncontrolled telecom environments |
| Transmit gain options | 1× or 0.5× - allows flexible matching to line impedance and codec sensitivity requirements |
| Package type | P-/PG-SSOP-24-1 - 0.65 mm pitch, surface-mount, footprint-compatible with legacy P-SSOP-24 designs |
| Loop current tolerance | Close-tolerance feeding - maintains constant loop voltage for line leakage < 5 mA (RLeak > 10 kΩ) |
Pinout & Package
PBL38640/2SOA is housed in a 24-pin Plastic Shrink Small Outline Package (P-/PG-SSOP-24-1), with 0.65 mm lead pitch and exposed thermal pad for enhanced thermal performance in high-density telephony modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT | Battery supply input | Accepts -48 V nominal feed; supports automatic high/low battery switching |
| TIPX / RINGX | Two-wire line interface outputs | Drive analog telephone line with programmable headroom and longitudinal balance >60 dB |
| VTRX | Four-wire transmit output | Delivers codec-sourced audio to hybrid circuitry with selectable 1×/0.5× gain |
| VRRX | Four-wire receive input | Accepts hybrid output for codec digitization; includes AC–DC separation via CHP capacitor |
| C3/C2/C1 | State control inputs | Three-bit binary encoding of SLIC operating mode (e.g., ringing = 001, active = 011) |
| RSN | Current sense resistor terminal | Connects external precision resistor for closed-loop loop current regulation |
| TEMP | Analog temperature monitor output | Provides voltage proportional to die temperature for system-level thermal management |
Key Features
| Feature | Design Value |
|---|---|
| No power-up sequence required | Enables immediate line activation after power application-critical for fast-boot VoIP gateways |
| Analog overtemperature protection | Permits continued transmission during thermal events without hard shutdown or reset |
| Programmable signal headroom (POV) | Adjusts transmit headroom dynamically to maintain SNR across varying line impedances |
| Ground key and ring trip detection | Supports call progress monitoring and supervisory signaling without external comparators |
| Tip open state with ring ground detector | Enables reliable off-hook detection and line seizure in multi-line shared-line configurations |
Applications
| Voice-over-DSL Gateways | IP-PBX Systems |
|---|---|
|
Use Scenario: Integrated analog line interface in residential VoDSL gateways connecting PSTN lines to DSL broadband backhaul. IC Role / Device Role / Timing Role: SLIC providing battery feed, hybrid function, and codec interface for two-wire to four-wire conversion. Use Value: 43 V open-loop voltage and >60 dB longitudinal balance ensure robust voice quality over long copper loops up to 5 km. |
Use Scenario: Multi-line analog trunk interface in enterprise IP-PBX units supporting legacy fax and alarm systems. IC Role / Device Role / Timing Role: Line interface managing loop supervision, polarity reversal, and ground key detection for call setup/teardown. Use Value: Tip open state and ring trip detection enable accurate off-hook/on-hook state tracking without external sensing circuitry. |
| VoIP Adapters | Telecom Test Equipment |
|
Use Scenario: Single-port analog telephone adapter (ATA) converting POTS devices to SIP-based VoIP networks. IC Role / Device Role / Timing Role: SLIC delivering regulated -48 V feed, programmable transmit gain, and on-hook transmission for silent monitoring. Use Value: 65 mW on-hook power dissipation reduces thermal load in fanless, compact enclosures. |
Use Scenario: Programmable line simulator in telecom test platforms emulating loop length, impedance, and fault conditions. IC Role / Device Role / Timing Role: Precision-controlled SLIC used to generate calibrated line voltages and currents for compliance validation. Use Value: Close-tolerance current feeding and programmable POV allow repeatable, traceable line condition generation per ITU-T K.20/K.21 standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LE89316B | Integrated DC-DC converter for battery generation; requires no external -48 V supply | Suitable for AC-powered VoIP adapters where centralized battery feed is unavailable | Select when system lacks -48 V infrastructure but requires same SLIC functionality |
| Si3050 | Digital-configurable SLIC with SPI interface; higher integration of codec and DTMF generator | Targeted at highly integrated single-chip VoIP solutions requiring software-defined line states | Select when firmware control of all SLIC parameters and embedded DTMF are required |
Compared with LE89316B and Si3050, the PBL38640/2SOA offers analog simplicity, deterministic timing, and minimal external component count-ideal for cost-sensitive, high-reliability analog line interfaces where fixed-function operation and thermal resilience are prioritized over configurability.
Availability
PBL38640/2SOA is available at Aetrix Electronics and suitable for voice-over-DSL gateways, IP-PBX systems, and VoIP adapters requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.
Supply support for PBL38640/2SOA 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 R&D and manufacturing infrastructure.
The FlexiSLIC™ product line was developed specifically for carrier-grade and enterprise telephony line interface applications, emphasizing analog precision, thermal robustness, and interoperability with legacy SICOFI® and VINETIC® codecs.
FAQ
What is the maximum loop length supported by PBL38640/2SOA?
The PBL38640/2SOA supports loop lengths up to 5 km with standard 24 AWG twisted-pair cable, based on its 43 V open-loop voltage at -48 V feed and ability to maintain constant loop voltage for line leakage < 5 mA (RLeak > 10 kΩ). Performance beyond this depends on actual line impedance and termination.
Does PBL38640/2SOA require external components for battery feed regulation?
Yes - it requires an external precision current-sense resistor (RSN) for closed-loop loop current regulation, and external resistors (RR, RT, RRX, RTX, RB) to configure battery feed characteristics, hybrid balance, and gain settings as specified in Table 6 of the datasheet.
Can PBL38640/2SOA operate without a microcontroller interface?
Yes - it uses three hardwired digital control inputs (C3/C2/C1) to select among seven predefined SLIC operating states (e.g., ringing, active, tip open), eliminating the need for SPI/I²C or firmware intervention in basic deployments.
Is PBL38640/2SOA RoHS-compliant?
The PBL38640/2SOA was released in April 2005, predating full RoHS enforcement; Infineon's official documentation confirms RoHS-5 compliance (lead exemption for high-melting-temperature solder alloys), with Pb-free versions (e.g., PBL38640/2SOA-1) introduced later under separate part numbering.
PBL38640/2SOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Lantiq
- Series:
- FlexiSLIC™
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- PG-DSO-24
PBL38640/2SOA FAQ
1.How can I place an order for PBL38640/2SOA through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38640/2SOA 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 PBL38640/2SOA reliable?
The price and inventory of PBL38640/2SOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38640/2SOA is usually 5 days.
3.What payment methods are accepted for PBL38640/2SOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38640/2SOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38640/2SOA?
PBL38640/2SOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38640/2SOA 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 PBL38640/2SOA?
For technical support, including PBL38640/2SOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38640/2SOA requirements.
6.How does Aetrix verify that PBL38640/2SOA is sourced from the original manufacturer or authorized distributors?
All PBL38640/2SOA 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 PBL38640/2SOA meets industry standards.
7.What is the process for return or replacement of PBL38640/2SOA?
All PBL38640/2SOA units undergo pre-shipment inspection (PSI). If there is an issue with PBL38640/2SOA, 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 PBL38640/2SOA part is unused and in its original packaging.
Return procedure for PBL38640/2SOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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