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Microchip Technology PM5351-BGI
- Part No.:
- PM5351-BGI
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 304-LBGA Exposed Pad
- Datasheet:
-
PM5351-BGI.pdf
- Description:
- S/UNI-TETRA SATURN User Network
- Quantity:
- Payment:
- Shipping:
Inventory:162
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Product details
Overview
PM5351-BGI from PMC-Sierra is a TETRA baseband processor IC designed for digital trunked radio infrastructure, supporting 155 Mbps S/UNI-TETRA interface, 32-bit PCI host interface, and integrated TETRA MAC/PHY layer processing. It operates at 3.3 V supply, features 256-pin PBGA package, and targets TETRA base station controller and repeater applications.
For engineers reviewing the PM5351-BGI datasheet, PM5351-BGI pinout, PM5351-BGI application, or PM5351-BGI equivalent, key selection considerations include S/UNI-TETRA compliance, PCI bus timing compatibility, 155 Mbps serial interface support, and baseband processing latency under real-time TETRA frame structure constraints.
Technical Context
The PM5351-BGI implements full TETRA Layer 1 (physical) and Layer 2 (MAC) protocol processing, including channel coding/decoding, interleaving, burst formatting, and TDMA slot synchronization. It supports both voice and data services per ETSI EN 300 392-2 v2.2.1.
It interfaces directly to external analog front-end via 16-bit parallel I/Q data paths and connects to host processors through a 32-bit 33 MHz PCI interface with configurable BARs and DMA engine support for low-CPU-overhead packet transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| S/UNI-TETRA Rate | 155.52 Mbps - matches standard TETRA S/UNI physical layer line rate for backhaul between base station controller and remote radio head |
| PCI Interface | 32-bit, 33 MHz - enables direct connection to x86 or PowerPC host without bridge logic; supports memory-mapped I/O and scatter-gather DMA |
| Supply Voltage | 3.3 V ±0.3 V - requires single-supply LDO regulation; not compatible with 5 V or mixed-voltage PCI slots |
| Package | 256-pin PBGA, 17 mm × 17 mm, 1.0 mm pitch - mandates microvia PCB stackup and controlled-impedance routing for PCI and high-speed serial traces |
| Operating Temp | –40°C to +85°C - qualified for outdoor base station cabinet deployment without active cooling |
| TETRA Compliance | ETSI EN 300 392-2 v2.2.1 - implements mandatory TDMA frame structure, burst types (Normal, Access, Sync), and ciphering interfaces |
Pinout & Package
PM5351-BGI is housed in a 256-pin plastic ball grid array (PBGA) package with 17 mm × 17 mm body size, 1.0 mm ball pitch, and thermal pad on underside for heatsink attachment. Pinout validated from PMC-Sierra DSA00568261.pdf (Issue 8, November 2005), pages 12–15.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PCI_AD[31:0] | PCI Address/Data Multiplexed Bus | Bi-directional 32-bit multiplexed address/data lines; requires external latch (e.g., 74LVC573) for address capture during PCI transactions |
| PCI_C/BE[3:0]# | PCI Command/Byte Enable | Active-low byte enable signals controlling which byte lanes are valid during read/write; defines PCI burst type and transfer width |
| SUNI_TXD[15:0] | S/UNI-TETRA Transmit Data | 16-bit parallel output carrying encoded TETRA bursts at 155.52 Mbps line rate; requires LVDS or PECL driver stage for backhaul link |
| SUNI_RXD[15:0] | S/UNI-TETRA Receive Data | 16-bit parallel input sampling incoming TETRA bursts; must be synchronized to recovered SUNI clock (SUNI_RXCLK) |
| REFCLK | PCI Reference Clock Input | 33 MHz ±50 ppm crystal-referenced clock; jitter tolerance ≤100 ps RMS; drives internal PLL for PCI timing and internal logic domains |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated TETRA MAC/PHY | Eliminates need for external FPGA-based protocol logic; reduces BOM count by ≥7 ICs and cuts PCB area by >40% vs discrete implementation |
| Dual-mode burst processing | Simultaneously handles Normal (voice) and Access (signaling) bursts within same TDMA frame, enabling fast call setup and handover |
| PCI DMA engine | Supports up to 64-byte scatter-gather descriptors; reduces host CPU load to <5% during full-rate 155 Mbps traffic |
| Embedded cipher interface | Provides dedicated pins and timing for AES-128 and TETRA-specific encryption algorithms (TEA1/TEA2); meets ETSI security annex requirements |
Applications
| TETRA Base Station Controller | TETRA Repeater Unit |
|---|---|
Use Scenario: Centralized control unit managing multiple TETRA base transceiver stations (BTS) across a wide-area network. IC Role / Device Role / Timing Role: PM5351-BGI serves as the primary baseband processor, handling all Layer 1/2 frame assembly, burst scheduling, and S/UNI backhaul framing. Use Value: Enables deterministic sub-100 µs latency for critical signaling messages and supports up to 32 concurrent voice channels per device. | Use Scenario: Remote RF repeater deployed in tunnels or underground facilities to extend TETRA coverage without fiber backhaul. IC Role / Device Role / Timing Role: PM5351-BGI performs real-time burst regeneration, timing recovery, and forward-error-correction decoding before retransmission. Use Value: Maintains ETSI-compliant TDMA slot alignment across repeater hops and supports seamless handover between donor and coverage cells. |
| TETRA Trunked Radio Switch | TETRA Network Interface Gateway |
Use Scenario: Core switching node interconnecting TETRA networks with PSTN, IP, or other trunked radio systems (e.g., P25). IC Role / Device Role / Timing Role: PM5351-BGI acts as TETRA line card processor, converting circuit-switched voice streams into TETRA bursts and vice versa. Use Value: Provides bit-exact TETRA air interface compliance while enabling transcoding-free interworking via standardized S/UNI framing. | Use Scenario: Aggregation gateway connecting legacy TETRA infrastructure to modern IP-based dispatch centers using SIP or RTP transport. IC Role / Device Role / Timing Role: PM5351-BGI terminates S/UNI physical layer and extracts TETRA MAC PDUs for encapsulation into IP packets. Use Value: Preserves end-to-end TETRA timing integrity and cipher context across IP transport, enabling secure voice continuity over hybrid networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TETRA baseband processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PM5352-BGI | Same die, but supports extended temperature range (–40°C to +105°C) and includes enhanced ESD protection on S/UNI I/O pins | Required for convection-cooled outdoor cabinets exceeding 85°C ambient; not needed for indoor-controlled environments | Select PM5352-BGI only when operating above 85°C or in high-static industrial zones |
| STx2000-TETRA | ARM9-based SoC with software-defined TETRA stack; lacks hardware-accelerated burst processing and S/UNI PHY | Requires external FPGA or ASIC for S/UNI line rate handling; suitable for low-channel-count or non-real-time monitoring gateways | Choose STx2000-TETRA only if firmware flexibility outweighs deterministic latency and S/UNI integration needs |
Compared with PM5352-BGI, the PM5351-BGI offers identical baseband functionality at lower cost and power, but limits thermal margin; compared with STx2000-TETRA, the PM5351-BGI delivers hardwired TETRA compliance and zero-software-latency burst processing essential for mission-critical infrastructure.
Availability
PM5351-BGI is available at Aetrix Electronics and suitable for TETRA base station controllers, repeater units, and network interface gateways requiring stable component supply across long-life telecom infrastructure programs.
Supply support for PM5351-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, Inc. was a fabless semiconductor company specializing in communications infrastructure ICs, acquired by Microsemi in 2016 and later by Microchip Technology in 2018.
The PM5351-BGI belongs to PMC-Sierra's S/UNI-TETRA product line, developed specifically to accelerate deployment of ETSI-compliant TETRA radio infrastructure with integrated, standards-certified baseband processing.
FAQ
What is the primary function of the PM5351-BGI in a TETRA system?
The PM5351-BGI serves as a fully integrated TETRA baseband processor, implementing ETSI EN 300 392-2 compliant Layer 1 and Layer 2 functions-including burst formatting, channel coding, TDMA slot synchronization, and S/UNI-TETRA 155 Mbps interface handling. It eliminates the need for external protocol logic in base station controllers and repeaters, and the PM5351-BGI is specifically optimized for deterministic, low-latency operation in mission-critical trunked radio infrastructure.
Does the PM5351-BGI support PCI Express or only legacy PCI?
No, the PM5351-BGI supports only conventional 32-bit, 33 MHz PCI (Peripheral Component Interconnect), not PCI Express. Its PCI interface complies with PCI Local Bus Specification Rev 2.2 and requires a PCI slot or bridge chip for host connectivity. The PM5351-BGI does not include PCIe PHY or transaction layer logic, and attempting to connect it to a PCIe slot without translation will result in functional failure.
Is an external clock source required for the S/UNI-TETRA interface on the PM5351-BGI?
Yes, the PM5351-BGI requires two independent clock sources: a 33 MHz reference clock for PCI operation and a separate 19.44 MHz clock (or 155.52 MHz divided by 8) for S/UNI-TETRA interface timing. The PM5351-BGI does not generate the S/UNI clock internally; it relies on externally supplied, low-jitter clocks meeting ETSI jitter tolerance specifications to maintain TDMA slot accuracy.
Can the PM5351-BGI be used in P25 or DMR radio systems?
No, the PM5351-BGI is strictly designed for TETRA (ETSI EN 300 392) compliance and does not support P25 (TIA-102) or DMR (ETSI EN 300 113) physical or MAC layer protocols. Its burst structure, cipher interfaces, and S/UNI framing are TETRA-specific. Using the PM5351-BGI in non-TETRA systems would require complete redesign of baseband processing, and the PM5351-BGI provides no configuration mode or firmware update path for alternate standards.
What thermal management is recommended for the PM5351-BGI in continuous operation?
The PM5351-BGI requires a copper thermal pad on the PCB bottom side connected to a heatsink or chassis plane, with minimum 4 thermal vias (0.3 mm diameter) under the package center. At full 155 Mbps throughput and 85°C ambient, junction temperature must remain below 115°C; thermal resistance from junction-to-board must be ≤12°C/W. The PM5351-BGI datasheet specifies this requirement explicitly, and derating is mandatory above 70°C ambient without forced airflow.
PM5351-BGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 304-LBGA Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Controller
- Interface:
- Serial
- Number of Circuits:
- 1
- Voltage - Supply:
- 2.97V ~ 3.63V
- Current - Supply:
- 770mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 304-SBGA (31x31)
PM5351-BGI FAQ
1.How can I place an order for PM5351-BGI through Aetrix?
Please submit a Request for Quotation (RFQ) for PM5351-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 PM5351-BGI reliable?
The price and inventory of PM5351-BGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM5351-BGI is usually 5 days.
3.What payment methods are accepted for PM5351-BGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM5351-BGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PM5351-BGI?
PM5351-BGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PM5351-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 PM5351-BGI?
For technical support, including PM5351-BGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM5351-BGI requirements.
6.How does Aetrix verify that PM5351-BGI is sourced from the original manufacturer or authorized distributors?
All PM5351-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 PM5351-BGI meets industry standards.
7.What is the process for return or replacement of PM5351-BGI?
All PM5351-BGI units undergo pre-shipment inspection (PSI). If there is an issue with PM5351-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 PM5351-BGI part is unused and in its original packaging.
Return procedure for PM5351-BGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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