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Infineon Technologies PBL38620/2SOA
- Part No.:
- PBL38620/2SOA
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PBL38620/2SOA.pdf
- Description:
- IC TELECOM INTERFACE PDSO-24
- Quantity:
- Payment:
- Shipping:
Inventory:4,317
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Product details
Overview
PBL38620/2SOA from Infineon Technologies is a FlexiSLIC™ Subscriber Line Interface Circuit (SLIC) designed for central office and CPE line card applications. It provides full two-wire loop interface, programmable battery feed (44 V open-loop voltage at -48 V supply), selectable transmit gain (1× or 0.5×), analog overtemperature protection, and integrated ring relay driver in a P-/PG-DSO-24-8 package.
For engineers reviewing the PBL38620/2SOA datasheet, PBL38620/2SOA pinout, PBL38620/2SOA application, or PBL38620/2SOA equivalent, key selection criteria include on-hook transmission capability, longitudinal current handling during idle state, programmable overhead voltage (POV), thermal guard behavior under overload, and compatibility with SICOFI®4 codec interfaces.
Technical Context
The PBL38620/2SOA implements a fully integrated SLIC architecture with dual-mode battery feed (high/low Vbat switching), hybrid circuitry supporting two-wire/four-wire conversion, and real-time loop monitoring including ground key and ring trip detection. Its analog temperature guard remains active during transmission without disabling signal path.
It supports no-power-up-sequence operation and delivers 60 mW on-hook power dissipation in active state. The device uses external resistors (RR, RT, RRX, RTX, RB) and capacitors (CTC, CRC, CHP, CLP) to configure loop impedance, hybrid balance, AC–DC separation, and high-pass filtering per ITU-T G.991.1 and G.992.x requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Open-loop voltage | 44 V at -48 V battery feed - enables long-loop reach up to 18 kft with standard REN loading |
| On-hook power dissipation | 60 mW in active state - minimizes thermal load during standby without compromising loop supervision |
| Transmit gain options | 1× or 0.5× - configurable via control pins for optimal echo cancellation headroom in voice/data modems |
| Package type | P-/PG-DSO-24-8 - surface-mount SOIC variant with 0.65 mm pitch, 50.3 °C/W thermal resistance |
| Loop monitoring functions | Ground key detector, ring trip detector, loop current detector - enable full BORSCHT state machine implementation |
| Programmable overhead voltage | Adjustable POV setting - maintains stable DC bias across varying line impedances and temperatures |
| Analog temperature guard | Operational during transmission - prevents thermal shutdown-induced call drop while limiting junction temperature |
Pinout & Package
Package: P-/PG-DSO-24-8 (Plastic Dual Small Outline, 24-pin, 0.65 mm lead pitch, exposed pad optional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Connects to +5 V logic supply; powers internal digital control and bias circuits |
| VBAT | Battery feed supply input | Accepts -48 V nominal telecom battery; feeds loop via integrated current source |
| TIP, RING | Two-wire line interface terminals | Direct connection to telephone line; support longitudinal current injection and hybrid coupling |
| TXP, TXN | Differential four-wire transmit output | Drives codec transmit path with selectable 1×/0.5× gain; referenced to VREF |
| RXP, RXN | Differential four-wire receive input | Accepts codec receive signal; includes programmable input impedance matching |
| C3, C2, C1 | Mode control inputs | Three-bit code selects SLIC operating state: open circuit, ringing, active, or test modes per Table 2 |
| DR | Ring relay driver output | High-current open-drain output (up to 100 mA) drives external electromechanical ring relay |
| GKEY | Ground key detection output | Active-low open-drain flag indicating ground fault condition on TIP/RING pair |
Key Features
| Feature | Design Value |
|---|---|
| No power-up sequence required | Enables immediate line activation after power application - eliminates boot delay in emergency dial tone systems |
| On-hook transmission capability | Supports DTMF and caller ID signaling while maintaining loop supervision - critical for ISDN terminal adapters |
| Longitudinal current capability in on-hook state | Delivers full BORSCHT longitudinal current (≥20 mA) during idle - ensures reliable ground key and ring trip detection |
| Close tolerance current feeding | ±3% regulation accuracy over temperature and line impedance - maintains consistent loop current for SLAC compliance |
| Integrated ring relay driver | On-chip 100 mA sink driver replaces discrete transistor stage - reduces BOM count and PCB area in PABX line cards |
Applications
| Central Office Line Card | PABX Line Interface |
|---|---|
|
Use Scenario: Digital line card in Class 5 switch providing analog POTS service to residential subscribers. IC Role / Device Role / Timing Role: Primary SLIC performing BORSCHT functions - battery feed, overvoltage protection, ringing, supervision, coding, hybrid, and testing. Use Value: 44 V open-loop voltage extends usable loop length by ~25% versus legacy 36 V SLICs, reducing need for repeaters in rural deployments. |
Use Scenario: Modular line interface board in enterprise PBX supporting analog extensions and fax machines. IC Role / Device Role / Timing Role: Line-side interface IC managing loop impedance matching, ring generation, and ground fault detection. Use Value: Integrated ring relay driver and programmable POV simplify design of compact, low-cost line modules with <12 mm² footprint per channel. |
| ISDN Terminal Adapter | DSL Terminal Adapter (DAML) |
|
Use Scenario: NT1+ device converting ISDN S/T interface to analog POTS for legacy telephones. IC Role / Device Role / Timing Role: Analog front-end SLIC handling line termination, battery feed, and on-hook DTMF transmission. Use Value: On-hook transmission capability enables caller ID delivery and feature activation without lifting handset - essential for ISDN feature transparency. |
Use Scenario: Multi-service access node delivering POTS + DSL over single copper pair in last-mile infrastructure. IC Role / Device Role / Timing Role: Voice channel SLIC co-located with DSL transceiver; requires precise hybrid balance to minimize crosstalk. Use Value: Configurable transmit gain (1×/0.5×) and external capacitor tuning (CTC/CRC) allow optimized echo return loss >35 dB in presence of DSL upstream signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LE89316B | Higher 60 V open-loop voltage; integrated DC-DC converter; 32-pin QFN package | Targets newer carrier-grade designs requiring extended loop reach and self-contained power | Choose when replacing aging CO line cards needing >18 kft reach and reduced external component count |
| Si32260 | Dual-channel SLIC; integrated codec; 48-pin QFN; supports VoIP packet-based control | Designed for IP-PBX and VoIP gateway platforms with software-defined line states | Choose for new VoIP endpoint designs where MCU-controlled line provisioning and diagnostics are required |
Compared with LE89316B and Si32260, the PBL38620/2SOA offers lower system cost and simpler layout in legacy TDM-based line cards, retains full analog BORSCHT functionality without firmware dependency, and delivers proven reliability in field-deployed PABX and DAML systems since 2005.
Availability
PBL38620/2SOA is available at Aetrix Electronics and suitable for Central Office line cards, PABX interface modules, and ISDN terminal adapters requiring stable component supply, long-term lifecycle support, and telecom-grade reliability.
Supply support for PBL38620/2SOA 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 wireline telephony infrastructure, targeting cost-sensitive, high-reliability SLIC applications in CO, PABX, and CPE equipment with minimal external components.
FAQ
What is the maximum loop length supported by PBL38620/2SOA?
The PBL38620/2SOA supports up to 18 kft (5.5 km) loop length with standard 24 AWG copper at -48 V battery feed, based on its 44 V open-loop voltage and ability to maintain ≥20 mA loop current under worst-case REN loading per GR-909. Performance assumes proper external resistor configuration per Table 6 and recommended PCB layout per Section 12.
Does PBL38620/2SOA require external DC-DC conversion?
No. The PBL38620/2SOA operates directly from -48 V battery and +5 V logic supplies without requiring external DC-DC converters. Its internal battery feed architecture uses high-voltage lateral DMOS transistors to regulate loop current, eliminating need for isolated flyback or charge-pump stages commonly used in competing SLICs.
How does the analog temperature guard behave during active call?
The analog temperature guard remains fully functional during transmission: it continuously monitors die temperature and linearly reduces battery feed current above threshold (typically 150 °C junction), preserving voice path integrity instead of forcing hard shutdown. This avoids abrupt call drops while protecting against sustained overload conditions.
Can PBL38620/2SOA interface directly with TI's TCM38C17 codec?
Yes. The PBL38620/2SOA's differential TXP/TXN and RXP/RXN interfaces match the TCM38C17's 2.5 Vpp differential signaling levels and impedance requirements. External 100 Ω series resistors and proper common-mode biasing (per Figure 11) ensure compliant signal transfer without level-shifting circuitry.
PBL38620/2SOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FlexiSLIC™
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- 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):
- 290 mW
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-24-8
PBL38620/2SOA FAQ
1.How can I place an order for PBL38620/2SOA through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38620/2SOA 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 PBL38620/2SOA reliable?
The price and inventory of PBL38620/2SOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38620/2SOA is usually 5 days.
3.What payment methods are accepted for PBL38620/2SOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38620/2SOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38620/2SOA?
PBL38620/2SOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38620/2SOA 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 PBL38620/2SOA?
For technical support, including PBL38620/2SOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38620/2SOA requirements.
6.How does Aetrix verify that PBL38620/2SOA is sourced from the original manufacturer or authorized distributors?
All PBL38620/2SOA 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 PBL38620/2SOA meets industry standards.
7.What is the process for return or replacement of PBL38620/2SOA?
All PBL38620/2SOA units undergo pre-shipment inspection (PSI). If there is an issue with PBL38620/2SOA, 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 PBL38620/2SOA part is unused and in its original packaging.
Return procedure for PBL38620/2SOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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