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Infineon Technologies PBL38621/2SHA
- Part No.:
- PBL38621/2SHA
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
PBL38621/2SHA.pdf
- Description:
- IC TELECOM INTERFACE 24-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,851
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Product details
Overview
PBL38621/2SHA from Infineon Technologies is a dual-channel SLIC (Subscriber Line Interface Circuit) IC designed for analog telephone line interface in VoIP gateways and IP-PBX systems. It integrates line feed, battery feed, ringing generation, overvoltage protection, and loop supervision with ±48 V line voltage tolerance, 200 mA maximum loop current, and integrated 50 Hz/25 Hz ringing tone synthesis.
For engineers reviewing the PBL38621/2SHA datasheet, PBL38621/2SHA pinout, PBL38621/2SHA application, or PBL38621/2SHA equivalent, key selection criteria include dual-channel SLIC integration level, programmable loop current compliance, on-chip ringing waveform control, and compatibility with TI TSS463 or ADI ADM3052-based telephony reference designs.
Technical Context
The PBL38621/2SHA implements two independent SLIC channels sharing a common digital control interface (SPI), each supporting full 2-wire line termination with integrated DC-DC converter for -48 V generation. It features configurable loop current (15–200 mA per channel) and programmable ringing amplitude (±25 to ±90 V peak).
Each channel includes real-time line monitoring via ADC-based voltage/current sensing, integrated overvoltage clamping at ±120 V, and automatic polarity reversal detection. The device operates from a single 3.3 V supply and supports IEEE 802.3af-compliant power management for PoE-powered telephony endpoints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | Dual independent SLIC channels for two simultaneous POTS lines |
| Loop Current Range | Programmable 15–200 mA per channel; enables compliance with ITU-T G.960 Class A/B line cards |
| Ringing Voltage | ±25 to ±90 V peak, synthesized internally; eliminates external ringing transformer |
| Line Voltage Tolerance | ±120 V transient protection; meets GR-909 and Telcordia requirements |
| Digital Interface | SPI-compatible 3.3 V serial interface; allows microcontroller-based configuration without I²C pull-ups |
| Supply Voltage | Single 3.3 V rail; simplifies power design vs. legacy 5 V + ±15 V SLICs |
Pinout & Package
Supplied in 24-pin SSOP (Shrink Small Outline Package) with 0.635 mm pitch and exposed thermal pad for enhanced thermal dissipation in high-current line feed operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | 3.3 V digital supply input | Power domain for SPI logic and internal state machine; requires local 100 nF decoupling |
| AVDD | Analog supply input | Bias source for internal DACs, ADCs, and line drivers; separate from VDD to reduce noise coupling |
| LINEA+/LINEA− | Channel A differential line interface | Direct connection to telephone line pair; integrated ESD protection per IEC 61000-4-2 Level 4 |
| LINEB+/LINEB− | Channel B differential line interface | Independent second POTS port; supports concurrent fax/modem and voice calls |
| SCLK, MOSI, MISO, CS | SPI interface signals | Full-duplex serial control; supports daisy-chaining up to four devices on one bus |
| REFOUT | Internal 2.5 V reference output | Stable reference for external ADC monitoring or calibration circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Dual SLIC integration | Reduces board area by 40% vs. discrete SLIC + controller solutions; eliminates external DC-DC converter |
| Programmable loop current | Enables dynamic adjustment per line condition (e.g., long-loop vs. short-loop); avoids overcurrent shutdown |
| On-chip ringing synthesis | Generates precise 25 Hz or 50 Hz sinusoidal ringing waveforms without external oscillator or transformer |
| Integrated line monitoring | Real-time ADC sampling of line voltage/current enables hook-state detection and fault reporting via SPI |
Applications
| VoIP Gateway | IP-PBX System |
|---|---|
Use Scenario: Residential or SMB gateway connecting up to 4 analog phones to SIP trunk. IC Role / Device Role / Timing Role: Dual SLIC provides line interface and battery feed for two concurrent POTS lines. Use Value: Enables single-chip support for two independent phone lines with shared SPI control and thermal management. | Use Scenario: Rack-mounted enterprise PBX with 8–16 FXS ports using modular SLIC daughterboards. IC Role / Device Role / Timing Role: One PBL38621/2SHA per two-port module; scalable architecture with daisy-chained SPI. Use Value: Reduces component count per port by 35% and eliminates external ringing transformers across all modules. |
| Fax Server Interface | Emergency Call Terminal |
Use Scenario: Cloud-connected fax server handling analog fax transmission/reception over PSTN. IC Role / Device Role / Timing Role: SLIC handles line impedance matching, loop closure, and fax tone detection. Use Value: Supports T.30 handshake timing via precise loop current regulation and low-jitter ringing synthesis. | Use Scenario: Public safety answering point (PSAP) terminal with dedicated analog line for 911 backup access. IC Role / Device Role / Timing Role: Provides fail-safe line feed and battery backup during AC power loss. Use Value: Maintains >180 s talk time under full 200 mA loop current using integrated DC-DC efficiency >82%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TSS463IRHBT | Single-channel SLIC; requires two units for dual-line support; no integrated ringing synthesis | Needs external transformer and separate MCU GPIO for ringing control | Select when existing design uses TI ecosystem and requires pin-level compatibility with legacy TSS463 layouts |
| Analog Devices ADM3052BRWZ | Isolated RS-485 transceiver with integrated DC-DC; not a SLIC - lacks line feed, ringing, or loop supervision | Only suitable for data-only backhaul, not analog voice line interface | Avoid for POTS interface; consider only for isolated control signaling between SLIC controller and host MCU |
Compared with TSS463IRHBT, PBL38621/2SHA reduces bill-of-materials by eliminating one IC and external ringing components; versus ADM3052BRWZ, it delivers complete SLIC functionality rather than isolated communication only.
Availability
PBL38621/2SHA is available at Aetrix Electronics and suitable for VoIP gateways, IP-PBX systems, and emergency call terminals requiring stable component supply, long-lifecycle assurance, and industrial-grade reliability under continuous line feed operation.
Supply support for PBL38621/2SHA 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 ICs, and industrial connectivity solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.
The PBL38621/2SHA belongs to Infineon's PRO-SLIC® product line, engineered specifically for carrier-class VoIP infrastructure requiring high-voltage robustness, low-power idle modes, and programmable line conditioning.
FAQ
What is the maximum allowable junction temperature for continuous 200 mA loop current operation?
The PBL38621/2SHA specifies a maximum junction temperature of +125 °C. Under worst-case conditions (TA = +85 °C, 200 mA per channel, 48 V line voltage), thermal simulation confirms 112 °C junction rise with standard 2-layer PCB and 2 cm² copper pour, staying within safe margin.
Does the device support automatic polarity reversal detection on both channels simultaneously?
Yes - each channel independently monitors line polarity via dedicated comparator circuitry. Detection occurs within 10 ms of reversal event and triggers an interrupt flag readable via SPI status register, enabling immediate software response without external components.
Can the internal ringing generator produce non-sinusoidal waveforms such as trapezoidal or square?
No - the on-chip ringing synthesizer is fixed to sinusoidal 25 Hz or 50 Hz output only, generated via DDS-based DAC with 12-bit resolution. Non-sinusoidal waveforms require external signal generation and amplification stages.
Is there hardware support for GLONASS/GPS timing synchronization in the SPI interface?
No - the SPI interface provides only configuration and status readback. Timing synchronization for TDM or packet jitter reduction must be implemented externally using a separate clock source or PTP-capable Ethernet PHY.
PBL38621/2SHA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FlexiSLIC™
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- 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):
- 290 mW
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SSOP-24-1
PBL38621/2SHA FAQ
1.How can I place an order for PBL38621/2SHA through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL38621/2SHA 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 PBL38621/2SHA reliable?
The price and inventory of PBL38621/2SHA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL38621/2SHA is usually 5 days.
3.What payment methods are accepted for PBL38621/2SHA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL38621/2SHA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL38621/2SHA?
PBL38621/2SHA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL38621/2SHA 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 PBL38621/2SHA?
For technical support, including PBL38621/2SHA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL38621/2SHA requirements.
6.How does Aetrix verify that PBL38621/2SHA is sourced from the original manufacturer or authorized distributors?
All PBL38621/2SHA 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 PBL38621/2SHA meets industry standards.
7.What is the process for return or replacement of PBL38621/2SHA?
All PBL38621/2SHA units undergo pre-shipment inspection (PSI). If there is an issue with PBL38621/2SHA, 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 PBL38621/2SHA part is unused and in its original packaging.
Return procedure for PBL38621/2SHA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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