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Infineon Technologies PBL38630/2QNT
- Part No.:
- PBL38630/2QNT
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
PBL38630/2QNT.pdf
- Description:
- IC TELECOM INTERFACE PLCC-28
- Quantity:
- Payment:
- Shipping:
Inventory:2,710
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Product details
Overview
PBL38630/2QNT from Infineon Technologies is a FlexiSLIC Subscriber Line Interface Circuit (SLIC) designed for central office line cards and digital loop carriers. It provides bidirectional two-wire interface to telephone lines, supports -48 V battery feed, delivers 43 V open-loop voltage, enables selectable transmit gain (1× or 0.5×), and integrates analog overtemperature protection with ring relay driver functionality - deployed in telecom infrastructure requiring stable on-hook transmission and longitudinal balance >60 dB.
For engineers reviewing the PBL38630/2QNT datasheet, PBL38630/2QNT pinout, PBL38630/2QNT application, or PBL38630/2QNT equivalent, key selection criteria include programmable overhead voltage (POV), loop current regulation tolerance, thermal guard behavior during active transmission, and compatibility with SICOFI®4 codec interfaces in CO/DLC systems.
Technical Context
The PBL38630/2QNT implements a fully integrated SLIC architecture with dual-mode battery feed (high/low Vbat switching), programmable signal headroom control via POV, and hybrid circuitry enabling two-wire/four-wire conversion. Its analog temperature guard remains functional during transmission without disabling signal path.
It operates across -40 °C to +85 °C ambient, supports no power-up sequence requirement, and maintains constant loop voltage for line leakage <5 mA (RLeak >10 kΩ at -48 V). The device uses internal bias current for RSN terminal and features integrated ring relay driver with TTL-compatible control inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | -40 °C to +85 °C ambient - ensures reliability in uncontrolled central office environments |
| Open-Loop Voltage | 43 V @ -48 V battery feed - sustains voice-grade loop closure over long copper pairs |
| Transmit Gain | Selectable 1× or 0.5× - adjusts signal level for hybrid loss compensation in different line impedances |
| Longitudinal Balance | >60 dB - suppresses common-mode noise coupling into four-wire receive path |
| On-Hook Power Dissipation | 65 mW in active state - minimizes thermal load during standby without compromising monitoring functions |
| Loop Current Regulation | Close tolerance feeding - maintains stable DC loop current despite line resistance variation |
| POV Range | Programmable overhead voltage - sets headroom margin for analog signal swing under varying battery conditions |
Pinout & Package
Package: P-/PG-LCC-28-3 (Plastic Leaded Chip Carrier, 28-pin, gull-wing leads, body size 11.5 mm × 11.5 mm, 1.27 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT | Battery supply input | Accepts -48 V nominal feed; supports automatic high/low battery switching |
| VTXO | Four-wire transmit output | Drives codec-side transmit path; gain configurable via external resistor network |
| VTRX | Two-wire line interface | Connects directly to telephone line pair; handles bidirectional AC/DC signaling |
| RSN | Current sense feedback | Provides internal bias current for loop current regulation and monitoring |
| C1, C2 | Mode control inputs | TTL-compatible; define operating state (open circuit, ringing, active) |
| RR | Ring relay driver output | Directly drives electromechanical ring relay; integrated driver eliminates external transistor |
Key Features
| Feature | Design Value |
|---|---|
| No power-up sequence required | Enables immediate line activation after power application - simplifies system boot timing |
| Analog overtemperature protection | Permits continued transmission while limiting junction temperature - avoids hard shutdown during overload |
| Integrated ring relay driver | Eliminates need for external driver transistor and associated biasing components |
| On-hook transmission capability | Supports line testing and diagnostics without lifting loop - critical for remote maintenance |
| Long loop battery feed tracking | Maintains maximum line voltage across varying loop resistance - extends reach beyond 10 km |
Applications
| Central Office Line Card | Digital Loop Carrier (DLC) |
|---|---|
Use Scenario: Provides line interface for PSTN subscriber lines in Class 5 central office switches. IC Role / Device Role / Timing Role: SLIC performs battery feed, loop supervision, ringing generation, and two/four-wire conversion. Use Value: Enables reliable off-hook detection, longitudinal noise rejection >60 dB, and 43 V open-loop voltage for long-loop support. |
Use Scenario: Used in remote DLC terminals serving business parks or rural exchanges. IC Role / Device Role / Timing Role: Acts as line interface between digital backplane and analog local loops. Use Value: Programmable POV and selectable gain adapt to variable cable lengths and loading conditions. |
| Remote Terminal Unit | DSLAM Line Card |
Use Scenario: Installed in street cabinet RTUs delivering POTS service alongside DSL. IC Role / Device Role / Timing Role: Manages legacy voice line interface while coexisting with broadband data paths. Use Value: On-hook transmission allows line integrity testing without disrupting DSL sync. |
Use Scenario: Embedded in multi-service DSLAM line cards supporting voice+data aggregation. IC Role / Device Role / Timing Role: Provides analog line termination independent of ADSL/VDSL PHY layer. Use Value: Integrated ring relay driver reduces component count and PCB footprint per line. |
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 power dissipation (120 mW); requires external ring driver; no analog thermal guard | Lacks integrated ring relay and thermal guard during transmission - needs additional protection circuitry | Preferred where higher loop current stability is prioritized over integration density |
| SLIC2802 | SSOP-24 package only; fixed 1× transmit gain; no POV programming; lower open-loop voltage (38 V) | Not suitable for long-loop (>8 km) or variable-battery environments requiring headroom tuning | Selected when cost-sensitive designs accept reduced flexibility and reach |
Compared with LE89316B and SLIC2802, the PBL38630/2QNT offers superior integration (ring driver + thermal guard), programmable headroom, and extended loop reach - making it optimal for space-constrained, thermally demanding CO/DLC deployments where design-in longevity matters.
Availability
PBL38630/2QNT is available at Aetrix Electronics and suitable for Central Office Line Cards, Digital Loop Carriers (DLC), and Remote Terminal Units requiring stable component supply, long-term lifecycle support, and qualified industrial temperature operation.
Supply support for PBL38630/2QNT 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 targets wireline telecom infrastructure, delivering highly integrated, thermally robust SLIC solutions optimized for central office, DLC, and multi-service access platforms.
FAQ
What is the function of the RSN pin on PBL38630/2QNT?
The RSN pin provides internal bias current for loop current sensing and regulation. It connects to an external sense resistor to close the feedback loop for precise DC loop current control, enabling stable feeding across varying line resistances up to 2.5 kΩ while maintaining constant voltage under leakage conditions.
Does PBL38630/2QNT require an external ring relay driver?
No. The PBL38630/2QNT integrates a dedicated ring relay driver on-chip (RR pin), capable of directly driving standard electromechanical ring relays without external transistors or biasing components - reducing BOM count and layout complexity in line card designs.
How does the analog overtemperature protection behave during transmission?
The analog overtemperature protection remains active during transmission and limits junction temperature by throttling power without interrupting the signal path. Unlike digital thermal shutdown, it permits continuous voice or test signal flow while preventing thermal runaway - critical for uninterrupted line monitoring.
What package variant does PBL38630/2QNT use, and why is it significant?
PBL38630/2QNT uses the P-/PG-LCC-28-3 package: a 28-pin plastic leaded chip carrier with gull-wing leads. This package offers superior thermal performance (lower θJA) versus SSOP/DSO variants, improved mechanical robustness in vibration-prone telecom cabinets, and better solder joint reliability for high-volume wave-soldered line cards.
PBL38630/2QNT 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
PBL38630/2QNT FAQ
1.How can I place an order for PBL38630/2QNT through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38630/2QNT 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 PBL38630/2QNT reliable?
The price and inventory of PBL38630/2QNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38630/2QNT is usually 5 days.
3.What payment methods are accepted for PBL38630/2QNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38630/2QNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38630/2QNT?
PBL38630/2QNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38630/2QNT 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 PBL38630/2QNT?
For technical support, including PBL38630/2QNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38630/2QNT requirements.
6.How does Aetrix verify that PBL38630/2QNT is sourced from the original manufacturer or authorized distributors?
All PBL38630/2QNT 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 PBL38630/2QNT meets industry standards.
7.What is the process for return or replacement of PBL38630/2QNT?
All PBL38630/2QNT units undergo pre-shipment inspection (PSI). If there is an issue with PBL38630/2QNT, 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 PBL38630/2QNT part is unused and in its original packaging.
Return procedure for PBL38630/2QNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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