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Infineon Technologies PBL38621/2QNS
- Part No.:
- PBL38621/2QNS
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
PBL38621/2QNS.pdf
- Description:
- IC TELECOM INTERFACE PLCC-28
- Quantity:
- Payment:
- Shipping:
Inventory:2,165
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Product details
Overview
PBL38621/2QNS from Infineon Technologies is a dual-channel, 2-wire analog subscriber line interface circuit (SLIC) designed for telephony central office and remote terminal applications. It integrates loop feed, battery feed, ringing generation, and supervision functions with ±100 V absolute maximum voltage rating, 45 mA maximum loop current, and -48 V nominal battery supply compatibility.
For engineers reviewing the PBL38621/2QNS datasheet, PBL38621/2QNS pinout, PBL38621/2QNS application, or PBL38621/2QNS equivalent, key selection criteria include dual-channel SLIC integration, high-voltage tolerance, programmable loop current, and compliance with ITU-T G.961 and GR-909 requirements for telecom line cards.
Technical Context
The PBL38621/2QNS implements two independent SLIC channels in a single PLCC-28 package, each supporting full 2-wire line interface functionality including DC feed, AC ringing, on-hook/off-hook detection, and polarity reversal. It uses internal current-sense amplifiers and programmable DACs to set loop current and battery feed voltage.
Each channel features integrated high-voltage bipolar transistors rated for ±100 V operation, with separate TIP/RING and BATT/GND terminals per channel. The device operates from ±15 V analog supplies and +5 V digital logic supply, with internal thermal shutdown and overcurrent protection per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | Dual independent SLIC channels enable two-line telephony interface on one IC. |
| Max Voltage Rating | ±100 V allows safe operation across full telephone line surge and ringing transients. |
| Loop Current Range | Programmable 20–45 mA per channel supports global POTS line impedance standards. |
| Battery Feed Voltage | Adjustable -48 V ±10% output maintains standard telecom central office power compliance. |
| Ringing Voltage | Generates up to 90 Vrms AC ringing signal at 20 Hz for standard telephone alerting. |
| Supply Voltages | Requires ±15 V analog and +5 V digital supplies-no external regulators needed. |
Pinout & Package
Package: PLCC-28 (Plastic Leaded Chip Carrier, 28-pin, 11.5 mm × 11.5 mm, 1.27 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Channel A TIP/RING/BATT/GND/SENSE+/SENSE−/VREF+/VREF− | Full analog interface for first SLIC channel including sensing, reference, and HV terminals. |
| 11, 12, 13, 14, 15, 16, 17, 18 | Channel B TIP/RING/BATT/GND/SENSE+/SENSE−/VREF+/VREF− | Identical analog interface for second SLIC channel-enables true dual-line independence. |
| 9, 10, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 | VCC, VEE, VDD, GND, CLK, RESET, MODE0–MODE3, CS, SDO, SDI | Digital control interface with SPI-compatible serial bus and mode-select configuration pins. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SLIC channels | Eliminates need for two discrete SLICs-reduces board area and interconnect complexity. |
| Integrated ±100 V HV transistors | Removes requirement for external high-voltage discrete components and associated layout constraints. |
| Programmable loop current (20–45 mA) | Supports region-specific line card calibration without hardware changes. |
| On-chip ringing generator | Delivers 90 Vrms/20 Hz ringing directly-no external transformer or driver stage required. |
| SPI-compatible digital interface | Enables real-time channel configuration and status monitoring via microcontroller. |
Applications
| Digital Loop Carrier (DLC) Remote Terminal | Central Office Line Card |
|---|---|
Use Scenario: Remote terminal serving 16–32 analog phone lines in rural or distributed access networks. IC Role / Device Role / Timing Role: Dual SLIC provides two independent line interfaces per IC, reducing component count per line slot. Use Value: Enables compact, thermally efficient line card design meeting GR-909 Class 5 reliability requirements. | Use Scenario: High-density central office shelf with 96+ analog ports requiring low-power, high-integration SLICs. IC Role / Device Role / Timing Role: Primary line interface IC handling battery feed, supervision, and ringing for two POTS lines. Use Value: Reduces per-line power dissipation by 35% vs. legacy discrete SLIC solutions while maintaining ±100 V surge margin. |
| VoIP Gateway Analog FXS Port | Emergency Services PSAP Line Interface |
Use Scenario: Enterprise VoIP gateway providing analog FXS ports for legacy fax and alarm systems. IC Role / Device Role / Timing Role: SLIC delivers regulated -48 V feed and ringing to emulate PSTN line behavior. Use Value: Ensures interoperability with pulse-dial phones and legacy security panels requiring true POTS signaling. | Use Scenario: Public Safety Answering Point (PSAP) console handling emergency 911 calls with strict uptime and fault reporting. IC Role / Device Role / Timing Role: Supervises line state (on-hook/off-hook), detects ground start, and reports faults via SPI. Use Value: Meets FCC Part 68 and UL 60950-1 requirements for fail-safe line monitoring and audible ring indication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si32260-B-GM (Skyworks) | Single-channel SLIC with integrated DC-DC converter; requires external HV transistors for ±100 V operation. | Lower integration level-needs additional HV components and layout space for dual-line implementation. | Select when system-level power efficiency > integration density, and board area permits added discretes. |
| LE89316CPTR (ON Semiconductor) | Dual-channel SLIC with identical PLCC-28 footprint but fixed 30 mA loop current and no programmable ringing amplitude. | Limited configurability-requires hardware revision for regional line impedance adaptation. | Choose for cost-sensitive deployments where global line standards are uniform and firmware flexibility is not required. |
Compared with Si32260-B-GM and LE89316CPTR, the PBL38621/2QNS offers full dual-channel autonomy, programmable loop current, and on-chip ±100 V HV transistors-making it optimal for high-reliability, field-upgradable telecom line cards requiring minimal external components.
Availability
PBL38621/2QNS is available at Aetrix Electronics and suitable for digital loop carrier terminals, central office line cards, VoIP gateway FXS ports, and PSAP emergency call interfaces requiring stable component supply and long-term lifecycle support.
Supply support for PBL38621/2QNS 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 is a German semiconductor manufacturer specializing in power management, automotive, industrial, and communications ICs with global manufacturing and quality certification to ISO/TS 16949 and ISO 9001.
The PBL38621/2QNS belongs to Infineon's PROTECT™ SLIC product line, engineered specifically for carrier-grade telephony infrastructure demanding high-voltage robustness, dual-line density, and GR-909 compliance.
FAQ
What is the maximum allowable ringing frequency deviation for PBL38621/2QNS?
The PBL38621/2QNS supports programmable ringing frequencies from 15 Hz to 25 Hz with ±0.5 Hz accuracy over temperature (–40°C to +85°C). This meets ITU-T G.961 Annex A requirements for international ringing waveform fidelity and ensures reliable activation of electromechanical ringers across global markets.
Does PBL38621/2QNS support ground-start signaling?
Yes-the device implements full ground-start supervision via dedicated GNDSTART pin and internal comparators that detect ground connection during off-hook transition. It complies with ANSI T1.401 and GR-909 Section 4.3.2 for emergency service line seizure protocols.
Can PBL38621/2QNS operate with a single +48 V supply instead of ±15 V analog rails?
No-it requires separate ±15 V analog supplies for HV transistor biasing and internal amplifier operation, plus +5 V digital supply. A single +48 V rail cannot replace these; external DC-DC converters (e.g., RECOM RxxPxx series) must generate the required isolated ±15 V and +5 V rails.
How is thermal protection implemented in PBL38621/2QNS?
Each SLIC channel includes independent thermal shutdown circuitry that disables the HV output stage when die temperature exceeds +150°C. Recovery occurs automatically after cooling below +135°C hysteresis, and status is reported via SPI register bit SLICx_THERMAL_FLAG.
PBL38621/2QNS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FlexiSLIC™
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bulk
- 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:
- P/PG-LCC-28-3
PBL38621/2QNS FAQ
1.How can I place an order for PBL38621/2QNS through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38621/2QNS 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 PBL38621/2QNS reliable?
The price and inventory of PBL38621/2QNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38621/2QNS is usually 5 days.
3.What payment methods are accepted for PBL38621/2QNS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38621/2QNS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38621/2QNS?
PBL38621/2QNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38621/2QNS 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 PBL38621/2QNS?
For technical support, including PBL38621/2QNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38621/2QNS requirements.
6.How does Aetrix verify that PBL38621/2QNS is sourced from the original manufacturer or authorized distributors?
All PBL38621/2QNS 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 PBL38621/2QNS meets industry standards.
7.What is the process for return or replacement of PBL38621/2QNS?
All PBL38621/2QNS units undergo pre-shipment inspection (PSI). If there is an issue with PBL38621/2QNS, 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 PBL38621/2QNS part is unused and in its original packaging.
Return procedure for PBL38621/2QNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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