BCM5321MIPB - 24-Port 10/100 + 2-Port GbE L2+ Switch | Broadcom
부품 번호: BCM5321MIPB ✓ 활성BCM5321MIPB 개요
An Ethernet switch is a networking semiconductor that receives frames on multiple ports and forwards them toward their destinations using Layer 2 addresses. A managed L2+ switch adds configuration and status functions beyond basic frame forwarding. In the product hierarchy, BCM5321MIPB is an Ethernet switch, a Layer 2 network interface controller, an interface IC, and ultimately an integrated circuit designed for communications equipment.
The principal feature is its mixed-speed port arrangement. Twenty-four 10/100 ports support legacy 100BASE-TX endpoints and existing Fast Ethernet infrastructure, while the two 1 GbE ports provide higher-bandwidth uplinks. Consolidating these functions can reduce the number of separate switching devices required in access, industrial, and embedded network systems. The manufacturer description identifies the BCM5321 family as a single-chip L2+ managed switch rather than a general-purpose host processor interface.
The 400-pin BGA package provides a high pin count suitable for the device's extensive Ethernet and management connections. Its physical package is a ball grid array in the BGA-400 family, intended for surface-mount assembly. Because the verified data does not provide the individual ball assignments, electrical limits, clocking details, memory configuration, or management interfaces, designers should obtain the official manufacturer datasheet before defining the PCB footprint, power architecture, or pin-level circuit.
Typical applications include industrial Ethernet switches, network-interface equipment, embedded communications platforms, and access systems that combine many Fast Ethernet endpoints with one or two Gigabit uplinks. In these systems, the 24-port Fast Ethernet section can connect local devices while the two Gigabit ports can connect an upstream backbone or management network. The practical benefit is fewer discrete switching blocks and a compact mixed-speed Ethernet interface.
The primary design consideration is footprint verification. A 400-pin BGA requires exact ball mapping, escape routing, layer-count planning, and assembly-process confirmation from the manufacturer datasheet. Power-supply sequencing, high-speed copper characteristics, thermal performance, and magnetics integration also require device-specific guidance rather than assumptions based only on the distributor description.
This page consolidates the verified Broadcom product description, distributor listings, package information, sourcing context, application guidance, and drop-in replacement assessment. It also separates confirmed BCM5321MIPB attributes from unavailable technical data so procurement and hardware teams can identify what must be confirmed from the manufacturer datasheet before committing to a design.
드롭인 대체품: BCM5321MIPB — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청BCM5321MIPB 최대 정격 & 전기적 특성
| Product Type | Single-chip L2+ managed Ethernet switch |
| Manufacturer | Broadcom Limited |
| Total Port Count | 26 ports |
| Fast Ethernet Port Count | 24 ports |
| Fast Ethernet Port Speed | 10/100 Mb/s |
| Gigabit Ethernet Port Count | 2 ports |
| Gigabit Ethernet Port Speed | 1 Gb/s |
| Network Layer | Layer 2 plus (L2+) |
| Switch Architecture | Single-chip |
| Package Type | BGA |
| Package Pin Count | 400 pins |
| 실장 유형 | Surface mount |
| Device Category | Interface controller / Ethernet IC |
BCM5321MIPB 400 pins 핀 구성 가이드
BCM5321MIPB(400 pins 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: BCM5321MIPB.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
BCM5321MIPB 적합 용도: 6 애플리케이션s: Industrial Ethernet Access Switch, Embedded Communications Gateway, Industrial Router Uplink, Network Appliance with Mixed-Speed Ports, Ethernet Test and Measurement Equipment, Managed Network Interface Card.
Industrial Ethernet Access Switch
The BCM5321MIPB fits industrial access equipment that must connect numerous 100 Mb/s field endpoints while providing higher-speed links toward plant infrastructure. Its 24 10/100 ports can serve sensors, programmable controllers, operator panels, and other Ethernet equipment, while the two 1 Gb/s ports provide Gigabit uplinks. The single-chip L2+ managed-switch architecture can reduce the number of separate switching blocks in a compact controller. Because the verified data does not specify operating temperature, isolation, surge performance, or PHY integration, an industrial design must confirm those requirements from Broadcom documentation. The mixed-speed arrangement is the principal fit, but production use also depends on exact package mapping, power sequencing, thermal analysis, and qualification for the deployment environment.
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Embedded Communications Gateway
The BCM5321MIPB can support embedded communications gateways that aggregate legacy 10/100 Mb/s devices and forward selected traffic through Gigabit links. Its 24 Fast Ethernet ports provide attachment capacity for local interfaces, while the 2 Gigabit ports can connect a processor module, backplane, or upstream network. The single-chip L2+ implementation is useful where the gateway requires managed Layer 2 behavior without a separate switch for every port group. Verification must cover the undocumented management interface, buffering, clocking, and host connectivity. Board designers should also obtain the exact BGA ball map and thermal data before routing the design.
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Industrial Router Uplink
The BCM5321MIPB is a candidate for industrial routers requiring multiple downstream Fast Ethernet connections and two dedicated Gigabit uplinks. Twenty-four 10/100 ports can connect local controllers, sensors, or service interfaces, while the two 1 Gb/s ports support aggregation toward backbone equipment. This arrangement can simplify a router chassis that otherwise needs multiple switching components. Actual implementation depends on features not present in the verified listing, including packet-buffer capacity, QoS, spanning-tree behavior, management protocols, and internal interfaces. Engineers should validate those functions in the official datasheet and confirm whether the target product needs integrated or external Ethernet PHYs.
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Network Appliance with Mixed-Speed Ports
The BCM5321MIPB suits network appliances that retain numerous 10/100 Mb/s client ports while providing newer 1 Gb/s connectivity for internal services or uplink traffic. Its 26-port mixed-speed arrangement allows a single switching device to replace separate Fast Ethernet and Gigabit switching blocks. This can simplify board partitioning while retaining managed Layer 2 functions. The verified information does not cover MAC capacity, buffering, latency, PHY implementation, or regulatory performance, so those specifications remain selection gates. A production implementation must also use the exact manufacturer package drawing and assembly land pattern for the 400-pin BGA.
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Ethernet Test and Measurement Equipment
The BCM5321MIPB can fit test and measurement instruments that require numerous 100 Mb/s device interfaces plus Gigabit links to a host or capture system. The 24 Fast Ethernet ports can organize multiple devices under test, while the 2 Gigabit ports can provide higher-throughput data movement. The managed L2+ feature set may support controlled topology and traffic forwarding in laboratory equipment. However, the supplied source does not state forwarding latency, MAC-table behavior, packet-buffer size, timestamp support, or diagnostic features. Those characteristics must be checked against the official BCM5321 documentation. The 400-pin BGA also demands careful thermal, escape-routing, and assembly planning.
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Managed Network Interface Card
The BCM5321MIPB is applicable to managed network-interface cards that need broad Fast Ethernet endpoint support and two Gigabit backplane or host links. The 24 10/100 ports can connect downstream equipment, and the 1 Gb/s ports can provide a high-speed internal connection to a host processor or switching fabric. Its single-chip managed L2+ organization can support dedicated line-card architectures. The available evidence does not confirm PCI, SPI, parallel-host, SerDes, or other management connections, so interface selection remains open. Before schematic capture, obtain the manufacturer pinout, supported clocking, power rails, PHY requirements, and package dimensions directly from Broadcom.
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추천 제품 요약
엔지니어링 참조 데이터: BCM5321MIPB — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Product Type | Single-chip L2+ managed Ethernet switch |
| Brand | Broadcom |
| Package | 400-pin BGA |
| Total Ethernet Ports | 26 ports |
| Fast Ethernet Ports | 24 ports at 10/100 Mb/s |
| Gigabit Ethernet Ports | 2 ports at 1 Gb/s |
| Switching Architecture | Single-chip |
| Network Layer | L2+ |
주요 차별점
- Mixed-speed port integration (vs No verified drop-in alternative)
- High-density integrated switching (vs No verified drop-in alternative)
- Management-focused Layer 2 positioning (vs No verified drop-in alternative)
- Compact network-interface architecture (vs No verified drop-in alternative)
설계 노트
Do not begin PCB layout from the confirmed 400-pin BGA description alone. Obtain the official package drawing, ball map, exposed-pad information, and recommended PCB land pattern from Broadcom. A 400-pin BGA requires deliberate escape routing and likely multiple signal layers; the verified source does not establish whether a thermal pad is present, so pad and via design must remain provisional until manufacturer documentation is available.
Plan the power tree only after confirming the BCM5321MIPB supply rails, current limits, sequencing, and power-good behavior from the official datasheet. The verified listing confirms the Ethernet configuration and package but does not provide voltage values or dissipation data. Do not infer analog, digital, and I/O rail requirements from the port counts because PHY and SerDes termination architectures can materially affect supply current and layout isolation.
Evaluate junction temperature using the exact manufacturer power and thermal-resistance data. The 400-pin BGA can offer substantial copper-contact area, but that does not establish safe dissipation for this specific device. Estimate total switching and I/O dissipation only after supply voltages, PHY configuration, and port activity are known. The current verified data contains no thermal resistance or maximum power ratings, so early thermal design should use conservative assumptions and update them from the datasheet.
Do not treat BCM5321MKPB as a drop-in replacement merely because it appears in the same BCM5321-family search result. Ordering suffixes can indicate package, temperature, or production differences, and the verified data does not supply its ball map or electrical details. A valid replacement requires an exact manufacturer comparison covering package, balls, power, port count, management features, qualification, and lifecycle. Any PCB substitution without that evidence risks an incompatible assembly or function.
규정 준수 정보
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the Broadcom brand.
