CH9121
Identity
- Manufacturer: WCH(南京沁恒)
- Model / MPN: CH9121
- LCSC: C87389
- Category: ethernet-serial-gateway
- Description: CH9121 network serial transparent-transmission chip; 3.3V; 10BASE-T/100BASE-TX; 10Mbit/s/100Mbit/s
- Source: EasyEDA/JLC verified common component seed
- Project designators: Not project-specific
- Project quantity per board: Not project-specific
Capabilities
- uart: interface
- ethernet: interface
Package And Footprint
- Package / footprint name: LQFP-64M(10x10)
- Pin count: Unknown
- EasyEDA symbol UUID: 4c8952e67cf24659b255dfb28400b3f3
- EasyEDA footprint UUID: 6aaddb138b3c4de991ad231a075d4644
- EasyEDA device UUID: e3ad1c17d3c94282b9a5cac3523ff3b0
- EasyEDA library UUID: 0819f05c4eef4c71ace90d822a990e87
Power And Operating Modes
- Active current: Not characterized in seed; extract active current from datasheet tables.
- Sleep / standby current: Not characterized in seed; extract sleep/standby current from datasheet tables.
- Supply rails: EasyEDA property: 3.3V.
- Notes: Seed values are search hints only. Verify power modes, rail limits, startup requirements, and reference design passives from the datasheet.
Procurement Classification
- JLC class: Extended Part
- JLC note / assembly basis: EasyEDA/JLC verified common connectivity, positioning, and RF interface seed
- Assembly status: jlc_extended
- Price-break table: Not captured in seed. Store only timestamped price-break snapshots when intentionally refreshed.
- Live stock: intentionally not stored as durable selection data; refresh externally before ordering.
Datasheet And Links
- Datasheet / product URL: https://item.szlcsc.com/datasheet/CH9121/88567.html
- Product URL: https://item.szlcsc.com/datasheet/CH9121/88567.html
- Datasheet-derived notes: Not extracted yet. Use PDF extraction to fill power modes, absolute maximums, pin functions, package variants, and reference design requirements.
Selection Notes
- Good for: reuse when package, electrical ratings, footprint, and assembly class match the project constraints
- Avoid when: Not captured yet.
- Known layout constraints: Verify package land pattern, decoupling requirements, thermal pad, RF keepouts, crystal routing, and boot straps from the datasheet.
- Equivalent search hints: match category
ethernet-serial-gateway, interfaces uart, ethernet, packageLQFP-64M(10x10), and EasyEDA footprint UUID6aaddb138b3c4de991ad231a075d4644.
Search Keywords
seed:common-connectivity-positioning, source:easyeda-bridge, iot, common-pcb, ch9121, ethernet-uart, serial-to-ethernet, wch, ethernet-serial-gateway, lqfp-64m-10x10, jlc-extended, uart, ethernet, jlc_extended, jlc-note:easyeda-jlc-verified-common-connectivity-positioning-and-rf-interface-seed, power