PM5991B-FEI - DIGI-G4 OTN Processor (No Encryption) | Microchip
Référence : PM5991B-FEI ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $179.32 | $179,32 |
| 10 | $165.5 | $1 655,00 |
| 100 | $148 | $14 800,00 |
| 250 | $134.5 | $33 625,00 |
| 500 | $122.8 | $61 400,00 |
PM5991B-FEI Présentation
An OTN processor is a specialized Application-Specific Integrated Circuit (ASIC) that performs the digital-layer functions of an optical transport network, including ODU/OTU frame mapping, multiplexing, switching, and forward-error-correction (FEC) processing. Within the system hierarchy it sits between the optical line-side transponder and the packet fabric, falling under the broader categories of Network Processor -> Communication ASIC -> Application-Specific Microcontroller -> Integrated Circuit. The DIGI-G4 family is Microchip's fourth-generation silicon in this category, replacing earlier DIGI-G3 devices in OTN line-card and muxponder designs.
Key features include 1932-ball BGA packaging, a commercial operating temperature range of 0 C to 125 C (TJ), and integration of OTN framing, switching and FEC functions on a single die. The 'FEI' suffix identifies the no-encryption (non-encrypted) software build, distinguishing it from the encryption-enabled PM5990 DIGI-G4 part number. The 'B' revision marks a second-silicon revision of the base PM5991 design, providing bug fixes and incremental feature updates over the earlier 'A' revision.
The PM5991B-FEI is engineered to deliver deterministic OTN switching throughput with hardware-accelerated ODUflex, ODUFlexE, and packet-over-OTN processing, supporting line rates commonly used in OTU2/OTU3/OTU4-class optical transport. Its high pin-count BGA package provides the high-speed SerDes and parallel fabric interfaces required by 100G/200G/400G optical line cards.
Typical applications include WDM/ROADM line cards, packet-optical transport systems (P-OTPs/P-OTNs), OTN muxponder/ transponder cards, and hyperscale data-center interconnect equipment. The wide integration reduces BOM count by replacing several discrete framers, mappers, and switch fabrics.
When designing with the PM5991B-FEI, ensure the PCB supports the 1932-ball BGA land pattern with matched-impedance routing for high-speed SerDes, and verify thermal management to keep junction temperature within the 0 C to 125 C operating range. Reference the manufacturer hardware reference design and PCB layout guide for stack-up and SerDes routing.
This page synthesizes distributor stock, lifecycle, and pricing data, drop-in same-family alternatives, and practical design notes beyond what is found on the manufacturer product page.
Alternatives de remplacement direct pour PM5991B-FEI — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PM5990B-FEI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PM5991A-FEI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PM5990A-FEI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PM5991B-FEI-R
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PM5991B-FEI Valeurs maximales et caractéristiques électriques
| Product Family | DIGI-G4 OTN Processor |
| Part Variant | No encryption (FEI build) |
| Silicon Revision | B (second revision) |
| Fonction | OTN Mapper / Network Processor |
| Catégorie | Application Specific Microcontroller / Network Processor |
| Core | Microchip DIGI-G4 OTN processing core |
| Boîtier | 1932-BBGA |
| Nombre de broches | 1932 |
| Type de montage | Surface Mount (BGA) |
| Température de jonction en fonctionnement | 0 C to +125 C (TJ) |
| Encryption Support | No (non-encrypted build) |
| Target Applications | OTN switching, P-OTN/POTP, WDM/ROADM, hyperscale DCI |
| Generation | Fourth-generation (DIGI-G4) |
Guide de configuration des broches du PM5991B-FEI 1932-bbga
Configuration des broches du PM5991B-FEI (boîtier 1932-bbga). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour PM5991B-FEI.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
PM5991B-FEI convient pour 6 applications: OTN Switching Line Cards, Packet-Optical Transport (P-OTN / POTP), WDM / ROADM Line Equipment, Hyperscale Data-Center Interconnect (DCI), OTN Muxponder / Transponder Cards, OTN Cross-Connect / Add-Drop Multiplexers.
OTN Switching Line Cards
The PM5991B-FEI's hardware-accelerated ODU/ODUflex/ODUFlexE mapping and FEC make it the natural choice for core OTN switch line cards that must terminate and re-originate OTU2/OTU3/OTU4-class traffic. Placed between the optical line-side transponder and the packet fabric, the device performs ODU cross-connect, tributary grooming, and hitless protection switching without software round-trips. Compared with a discrete framer-plus-FPGA implementation, the integrated DIGI-G4 reduces BOM count, power, and PCB area while supporting the deterministic throughput that OTN SLA contracts require.
Recommandé
Packet-Optical Transport (P-OTN / POTP)
The PM5991B-FEI is purpose-built for packet-optical transport platforms (P-OTPs/P-OTNs) that converge OTN and packet services on a single line card. Its integrated OTN mapper, packet-aware ODUflex support, and high-speed SerDes fabric ports let a single device terminate MPLS-TP, Carrier Ethernet, and OTN traffic while mapping them into OTU containers. The non-encrypted FEI build suits P-OTN deployments where MACsec/OTNsec is handled by an adjacent PHY/encryptor rather than inside the mapper ASIC.
Recommandé
WDM / ROADM Line Equipment
Wavelength Division Multiplexing (WDM) and Reconfigurable Optical Add-Drop Multiplexer (ROADM) platforms rely on a high-integration OTN processor to map client services onto DWDM wavelengths, and the PM5991B-FEI delivers that function on a single die. Its hardware FEC, integrated OTN framer, and fabric ports handle the wavelength-side OTU termination while the device feeds downstream optical channel monitors and amplifiers. The 1932-BBGA's high SerDes lane count matches the multi-wavelength I/O required by ROADM add/drop cards.
Recommandé
Hyperscale Data-Center Interconnect (DCI)
Hyperscale DCI platforms use 100G/200G/400G coherent optics that need a high-throughput OTN processor to map Ethernet and OTN traffic onto the optical channel. The PM5991B-FEI's hardware FEC, integrated framer, and high-speed fabric ports are sized for DCI's deterministic line-rate requirements, while the 1932-BBGA's parallel fabric links support the cross-connect density of multi-rack DCI pods. Choosing the FEI (no-encryption) variant keeps per-unit cost low for DCI fabrics that terminate encryption in the leaf-spine switch.
Recommandé
OTN Muxponder / Transponder Cards
Muxponder and transponder cards aggregate multiple client signals (10G/25G/100G Ethernet, Fibre Channel, OTU) onto a single higher-rate OTU wavelength, and the PM5991B-FEI provides the OTN mapping, multiplexing, and FEC in a single device. Its hardware ODU multiplexer and tributary ports handle client aggregation without an external mapper, reducing the muxponder's BOM and power. The B-silicon revision brings incremental interoperability fixes that benefit multi-vendor muxponder deployments.
Recommandé
OTN Cross-Connect / Add-Drop Multiplexers
Digital cross-connect and add-drop multiplexer systems need an OTN processor that can groom, add, drop, and pass-through OTN tributaries at line rate, and the PM5991B-FEI delivers those functions in hardware. Its integrated ODU cross-connect fabric and hitless protection switching support the carrier-grade availability targets of OTN cross-connects, while the 1932-BBGA's high pin count exposes enough fabric ports for non-blocking tributary switching. The non-encrypted FEI build suits cross-connects where encryption is applied upstream.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PM5991B-FEI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PM5990B-FEI | PM5991A-FEI | PM5990A-FEI |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 1932-BBGA | 1932-BBGA | 1932-BBGA | 1932-BBGA |
| Product Family | DIGI-G4 OTN Processor | DIGI-G4 OTN Processor | DIGI-G4 OTN Processor | DIGI-G4 OTN Processor |
| Silicon Revision | B | B | A | A |
| Encryption Support | No (FEI no-encryption build) | Yes (FEI encryption-enabled build) | No (FEI no-encryption build) | Yes (FEI encryption-enabled build) |
| Function | OTN Mapper / Network Processor | OTN Mapper / Network Processor | OTN Mapper / Network Processor | OTN Mapper / Network Processor |
| Operating Junction Temperature | 0 C to +125 C (TJ) | 0 C to +125 C (TJ) | 0 C to +125 C (TJ) | 0 C to +125 C (TJ) |
| Target Applications | OTN switching, P-OTN, WDM/ROADM, DCI | OTN switching, P-OTN, WDM/ROADM, DCI (secured) | OTN switching, P-OTN, WDM/ROADM, DCI | OTN switching, P-OTN, WDM/ROADM, DCI (secured) |
| Drop-in Compatibility | Reference part | Yes - same 1932-BBGA footprint, encryption differs | Yes - same 1932-BBGA footprint, silicon rev differs | Yes - same 1932-BBGA footprint, encryption + silicon rev differ |
Principaux différenciateurs
- Fourth-generation DIGI-G4 silicon vs older DIGI-G3 (vs PM8597B-FEI)
- Non-encrypted build reduces cost and export-control paperwork (vs PM5990B-FEI)
- B-silicon revision with incremental bug fixes and feature updates (vs PM5991A-FEI)
Notes de conception
Estimated: routing the 1932-BBGA package requires a high-layer-count PCB (typically 12+ layers) with matched-impedance SerDes traces, length-matched differential pairs, and a continuous ground reference plane under the high-speed lanes. Reference Microchip's DIGI-G4 hardware reference manual for stack-up, via pattern, and SerDes lane grouping. A single BGA break-out mistake compounds significantly. Use buried vias and a 1.0 mm or finer BGA pitch BGA fanout strategy.
Estimated: at full OTN switching load the PM5991B-FEI can dissipate multi-watt power in the 1932-BBGA, so junction temperature must stay below 125 C. Use a thermal via array under the BGA thermal balls, ample PCB copper pour, and adequate chassis airflow. Cross-check actual dissipation against the Microchip power-estimation tool, and derate for altitude and inlet-air temperature per system requirements.
Do not confuse the PM5991B-FEI (no encryption, B-silicon) with the PM5990B-FEI (encryption enabled) or the PM5991A-FEI (A-silicon). All three share the same 1932-BBGA footprint, but firmware/security-configuration and silicon-revision errata differ. Verify the exact Microchip order code on the shipping label before board bring-up, and confirm with the Microchip product page that the FEI no-encryption build matches your design's security posture.
Place the PM5991B-FEI close to the optical line-side transponder and the packet fabric device to minimize SerDes channel loss; place its reference clock and PLL supply-filter components within the manufacturer's recommended distance, and isolate high-speed SerDes return currents from low-speed management I/O. Reference the Microchip DIGI-G4 hardware reference design for the recommended decoupling network and clock-tree topology.
Informations de conformité
RoHS, REACH, lead-free and halogen-free status not present in the verified web snippets; compliance should be confirmed against the Microchip product page or PM5991 datasheet. AEC-Q100 is not applicable - this is an OTN processor, not an automotive-grade part. Export-control paperwork may apply to the encryption-enabled PM5990 sibling; the FEI no-encryption build of PM5991B-FEI generally avoids the encryption-related export-control category.
