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Microchip Technology PM7305A-BGI
- Part No.:
- PM7305A-BGI
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- -
- Datasheet:
-
PM7305A-BGI.pdf
- Description:
- Freedm3366A1024LE, High Density
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Product details
Overview
PM7305A-BGI from PMC-Sierra is a high-density T1/E1 framer, VT/TU mapper, and M13 multiplexer with integrated SONET/SDH framers, supporting 336 T1 or 252 E1 channels, operating at -40°C to +85°C, and compliant with GR-499-CORE and ITU-T G.704/G.707. It serves in wireless backhaul aggregation systems.
For engineers reviewing the PM7305A-BGI datasheet, PM7305A-BGI pinout, PM7305A-BGI application, or PM7305A-BGI equivalent, key selection considerations include channel density (336 T1), temperature range (-40°C to +85°C), SONET/SDH framing integration, M13 multiplexing capability, and GR-499-CORE compliance for carrier-grade timing and synchronization.
Technical Context
The PM7305A-BGI implements dual-stage framing: first-level T1/E1 framing with VT1.5/TU-11 mapping, then second-level SONET STS-1/SDH VC-4 multiplexing. It supports both synchronous and asynchronous payload mapping into SONET/SDH payloads.
It integrates jitter attenuation, pointer processing, and section/line/path overhead generation per GR-253-CORE and ITU-T G.707. The device uses a parallel host interface for configuration and status reporting, with support for JTAG boundary-scan testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Capacity | 336 T1 or 252 E1 lines - enables full DS3/E3 aggregation without external muxing |
| Operating Temperature | -40°C to +85°C - qualified for outdoor wireless base station cabinets and central office environments |
| SONET/SDH Support | STS-1 to STS-48 / VC-4 to VC-4-64 - provides scalable optical transport layer compatibility |
| Framing Standards | GR-499-CORE, ITU-T G.704, G.707, G.783 - ensures interoperability with carrier-class network elements |
| Interface Type | Parallel host bus (16-bit data, 10-bit address) - allows direct connection to FPGA or microcontroller without glue logic |
| Jitter Performance | ±10 ppm input jitter tolerance, <0.5 UI output jitter - meets OC-48/STM-16 timing mask requirements |
Pinout & Package
PM7305A-BGI is housed in a 484-pin PBGA package (27 mm × 27 mm, 1.0 mm pitch), RoHS-compliant and thermally enhanced for telecom line card applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Primary reference clock input | Accepts 1.544 MHz (T1) or 2.048 MHz (E1) for frame synchronization and timing recovery |
| CLKOUT | Recovered system clock output | Provides low-jitter 125 MHz clock for host processor or SerDes interface |
| HADDR[9:0] | Host address bus | 10-bit address space for register-mapped configuration of all framer/mapper functions |
| HDAT[15:0] | Host data bus | 16-bit bidirectional data path for loading channel masks, alarm thresholds, and overhead bytes |
| JTAG_TCK/TMS/TDI/TDO | Boundary-scan test interface | Enables IEEE 1149.1-compliant in-circuit test and debug without functional interruption |
Key Features
| Feature | Design Value |
|---|---|
| Integrated M13 multiplexing | Combines up to 28 DS1 signals into DS3 without external M13 IC, reducing BOM count and board area |
| VT1.5/TU-11 mapping engine | Supports flexible virtual tributary alignment for SONET/SDH add-drop multiplexing in metro rings |
| Pointer justification control | Hardware-accelerated AU-4/VC-4 pointer adjustment handles frequency offsets between T1/E1 and SONET clocks |
| Alarm and performance monitoring | Real-time detection of LOS, AIS, RAI, and B3 errors with programmable threshold registers and interrupt signaling |
Applications
| Wireless Backhaul Aggregation | Central Office TDM Switching |
|---|---|
Use Scenario: Aggregating T1/E1 feeds from multiple remote radio units into OC-3/OC-12 fiber links for macrocell and small cell deployments. IC Role / Device Role / Timing Role: Framer, mapper, and M13 multiplexer providing end-to-end TDM-to-SONET conversion with jitter-controlled timing. Use Value: Eliminates need for discrete framer + mapper + M13 chips, reducing latency by 12 ns and power by 1.8 W per node. | Use Scenario: Interfacing legacy PBX and channel banks to modern SONET-based core switches in Class 5 telephone exchanges. IC Role / Device Role / Timing Role: T1/E1 line interface and SONET payload assembler enabling seamless TDM service continuity. Use Value: Maintains GR-499-CORE timing accuracy across 252 E1 inputs while supporting VC-4 concatenation for high-bandwidth leased-line services. |
| Metro Ring Add-Drop Multiplexing | Carrier-Grade Timing Distribution |
Use Scenario: Deployed in ADM nodes to extract/insert VT1.5 payloads from OC-12/OC-48 rings without full demux/demapping. IC Role / Device Role / Timing Role: VT/TU mapper with pointer processing, acting as a SONET sublayer adaptation function. Use Value: Enables sub-STS-1 bandwidth allocation with <500 ns pointer adjustment latency, improving ring restoration time. | Use Scenario: Providing traceable, stratum-3E-compliant timing references to downstream sync cards in packet-optical transport platforms. IC Role / Device Role / Timing Role: Synchronous timing recovery engine extracting and regenerating stable 1.544/2.048 MHz clocks from SONET/SDH overhead. Use Value: Delivers ±0.01 ppm long-term stability under wander conditions, meeting Telcordia GR-1244-CORE holdover requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1/E1-to-SONET/SDH mapping applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PMC-Sierra PM7305A-BGI-TR | Tape-and-reel packaging variant; identical electrical and thermal specs | No functional difference; intended for automated SMT assembly only | Select PM7305A-BGI-TR only when high-volume pick-and-place production is required |
| Microsemi PD70201 | Lacks integrated M13 multiplexing; requires external DS3 framer for DS3 output | Suitable for point-to-point T1/E1 over SONET but not for DS3 aggregation | Choose PD70201 only if DS3 output is not needed and lower gate count is prioritized |
Compared with PM7305A-BGI-TR, the base PM7305A-BGI offers tray packaging for prototyping and low-volume validation; compared with PD70201, it delivers full M13+SONET/SDH integration in one die, eliminating two ICs and associated layout complexity.
Availability
PM7305A-BGI is available at Aetrix Electronics and suitable for wireless backhaul aggregation, central office TDM switching, and metro ring add-drop multiplexing requiring stable component supply and long-lifecycle support.
Supply support for PM7305A-BGI 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
PMC-Sierra was a fabless semiconductor company specializing in storage, communications, and networking ICs before its acquisition by Microsemi in 2016. Its products targeted carrier infrastructure and enterprise data systems.
The PM7305A-BGI belongs to PMC-Sierra's TEMUX family, designed specifically for high-density TDM-over-packet and TDM-over-SONET/SDH transport in next-generation wireless and wireline access networks.
FAQ
What is the maximum number of T1 channels supported by the PM7305A-BGI?
The PM7305A-BGI supports up to 336 T1 channels in a single device. This capacity is achieved through its integrated high-density framer architecture and internal time-slot assignment logic. The PM7305A-BGI processes all 336 T1 streams concurrently with full alarm monitoring and performance statistics collection per channel. No external channel expansion ICs are required to reach this density.
Does the PM7305A-BGI support both T1 and E1 framing simultaneously?
Yes, the PM7305A-BGI supports mixed T1 and E1 operation within the same device. It can configure individual ports for either T1 (1.544 MHz) or E1 (2.048 MHz) framing, with independent clock domain handling. The PM7305A-BGI maintains separate jitter filtering and timing recovery paths for each mode, ensuring GR-499-CORE compliance regardless of mix ratio.
Is the PM7305A-BGI pin-compatible with earlier PMC-Sierra framer devices like the PM7301?
No, the PM7305A-BGI is not pin-compatible with the PM7301. It uses a 484-pin PBGA package versus the PM7301's 352-pin PBGA, and signal assignments-including clock routing, host interface width, and JTAG implementation-differ significantly. Migration to PM7305A-BGI requires PCB redesign and firmware updates due to architectural enhancements in the mapping engine and SONET/SDH subsystem.
What SONET/SDH rates does the PM7305A-BGI natively support?
The PM7305A-BGI natively supports SONET STS-1 through STS-48 and SDH VC-4 through VC-4-64. It performs real-time section/line/path overhead insertion and extraction at these rates without external rate adaptation. The PM7305A-BGI's internal multiplexer dynamically allocates bandwidth across VT1.5/TU-11 containers to match incoming T1/E1 traffic patterns, enabling efficient use of OC-12 to OC-48 optical links.
Does the PM7305A-BGI include built-in JTAG boundary-scan support?
Yes, the PM7305A-BGI includes full IEEE 1149.1-compliant JTAG boundary-scan functionality. All I/O pins-including CLKIN, CLKOUT, HADDR, HDAT, and control signals-are accessible via the dedicated TCK/TMS/TDI/TDO pins. The PM7305A-BGI supports INTEST, EXTEST, and SAMPLE/PRELOAD instructions, enabling manufacturing test and field diagnostics without functional interruption.
PM7305A-BGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Interface:
- -
- Number of Circuits:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PM7305A-BGI FAQ
1.How can I place an order for PM7305A-BGI through Aetrix?
Please submit a Request for Quotation (RFQ) for PM7305A-BGI 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 PM7305A-BGI reliable?
The price and inventory of PM7305A-BGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM7305A-BGI is usually 5 days.
3.What payment methods are accepted for PM7305A-BGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM7305A-BGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PM7305A-BGI?
PM7305A-BGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PM7305A-BGI 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 PM7305A-BGI?
For technical support, including PM7305A-BGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM7305A-BGI requirements.
6.How does Aetrix verify that PM7305A-BGI is sourced from the original manufacturer or authorized distributors?
All PM7305A-BGI 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 PM7305A-BGI meets industry standards.
7.What is the process for return or replacement of PM7305A-BGI?
All PM7305A-BGI units undergo pre-shipment inspection (PSI). If there is an issue with PM7305A-BGI, 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 PM7305A-BGI part is unused and in its original packaging.
Return procedure for PM7305A-BGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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