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WCH CH9121A product image
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WCH CH9121ARoHS

Manufacturer
WCHAsian Brands
MPN
CH9121A
LCSC Part #
C42435783
Packaging
LQFP-64M(10x10)
Customer #
Key Attributes
Network serial port transparent transmission chip
Datasheetpdf iconWCH CH9121A
In-Stock: 607
607 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
1+$ 4.2469$ 4.25
10+$ 3.6409$ 36.41
30+$ 3.2796$ 98.39
160+$ 2.915$ 466.40
480+$ 2.7465$ 1318.32
960+$ 2.6703$ 2563.49
Standard Packaging160/Full Tray
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Power Over Ethernet (PoE) Controllers
ManufacturerWCH
PackagingLQFP-64M(10x10)
FeaturesPower-on reset;Programmable LED indication
Ethernet Speed Standards10BASE-T;100BASE-TX
Integrated PHYYes
Voltage - Supply1.8V;2.5V;3.3V
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging160
Sales UnitPiece

Introduction

AI Translation

CH9121 is a network serial transparent transmission chip integrating a 10/100M Ethernet MAC and PHY transceiver, fully compliant with IEEE 802.3. Its built-in TCP/IP stack enables bidirectional transparent transmission between network packets and serial data. The chip supports four operating modes — TCP Client, TCP Server, UDP Client, and UDP Server — with a maximum serial baud rate of 10Mbps. Parameters can be easily configured via host PC software or serial commands.

Features

AI Translation
  • Integrated Ethernet MAC and PHY transceiver
  • Supports 10/100M, full-duplex/half-duplex auto-negotiation, IEEE802.3 compliant
  • Supports MDI/MDIX auto-crossover
  • I/O pins support 3.3V, 2.5V, 1.8V power supply, compatible with MCUs of various voltage standards
  • Built-in network port pull-up resistors and crystal oscillator matching capacitors, simplifying external circuitry
  • Built-in TCP/IP protocol stack, supports IPv4, ARP, ICMP, IGMP, UDP, TCP
  • Supports DHCP for automatic IP address acquisition and DNS domain name access
  • Operating modes: TCP Client, TCP Server, UDP Client, UDP Server
  • Supports two independent UART ports with independent transparent transmission
  • UART baud rate: 300bps ~ 10Mbps
  • Network parameters (operating mode, port, IP, etc.) configurable via PC software or serial commands
  • UART supports full-duplex and half-duplex communication, supports RS485 automatic TX/RX switching
  • LED status indicators for link and activity states
  • Provides virtual COM port software for PC
  • Supports keep-alive mechanism
  • Available in TSSOP20 and LQFP64M lead-free packages