CP2104

Part: CP2104-F03-GMR — Silicon Labs

Type: Single-Chip USB-to-UART Bridge Controller

Description: USB 2.0 full-speed USB-to-UART bridge with integrated transceiver, oscillator, 1024-byte OTP ROM and 3.45 V on-chip regulator, supporting baud rates from 300 bps to 2 Mbps in a 4x4 mm QFN-24 package.

Operating Conditions:

• Supply voltage (VDD): 3.0–3.6 V; VIO: 1.8 V to VDD
• Operating temperature: -40 to +85 °C
• Regulator input (REGIN): 3.0–5.25 V; USB bus powered: 4.0–5.25 V

Absolute Maximum Ratings:

• Max supply voltage (VDD or VIO with respect to GND): 4.2 V
• Max total current through VDD, VIO and GND: 500 mA
• Max output current sunk by RST or any I/O pin: 100 mA
• Ambient temperature under bias: -55 to 125 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Supply current, normal operation (VREG enabled): 17.0 mA typ, 18.5 mA max
• Supply current, suspended (VREG enabled): 100 μA typ, 200 μA max
• USB pull-up supply current: 200 μA typ, 228 μA max
• Voltage regulator output (1–100 mA load): 3.3 V min, 3.45 V typ, 3.6 V max
• Regulator maximum supply current: 100 mA, including the CP2104's own supply current
• Regulator bias current: 120 μA max
• I/O output high voltage: VIO - 0.1 V min at IOH = -10 μA
• I/O output low voltage: 0.1 V max at IOL = 10 μA; 0.4 V max at IOL = 8.5 mA
• Input high voltage: 0.7 x VIO min; input low voltage: 0.6 V max
• Minimum RST low time for system reset: 15 μs
• UART baud rate: 300 bps to 2 Mbps; 576-byte RX and 576-byte TX buffers

Features:

• Integrated USB transceiver with no external resistors required
• Integrated clock with no external crystal required
• 1024-byte one-time programmable ROM for customizing USB VID, PID, strings, serial number and GPIO configuration
• On-chip power-on reset circuit
• USB 2.0 compliant, full-speed (12 Mbps), with USB Suspend support
• Full modem handshaking signals; hardware or X-On/X-Off flow control
• Data formats: 5–8 data bits, odd/even/mark/space/no parity, 1/1.5/2 stop bits
• Four GPIO signals for status and control
• RS-485 mode with bus transceiver control
• Configurable I/O voltage from 1.8 V to VDD via the VIO pin, or up to 5 V with an external pull-up
• Royalty-free Virtual COM Port drivers (Windows, Mac OS-X, Linux) and USBXpress drivers

Applications:

• Upgrade of RS-232 legacy devices to USB
• Upgrade of RS-485 legacy devices to USB
• Cellular phone USB interface cable
• PDA USB interface cable
• USB to RS-232 serial adapter

Package:

• RoHS-compliant 24-pin QFN (4x4 mm)

• Upgrade of RS-232 legacy devices to USB
• Upgrade of RS-485 legacy devices to USB
• Cellular phone USB interface cable
• PDA USB interface cable
• USB to RS-232 serial adapter

VDD = 3.0 to 3.6 V, -40 to +85 °C unless otherwise specified.

1. If the device is connected to the USB bus, the USB Pull-up Current should be added to the supply current for total supply current.

2. The USB Pull-up supply current values are calculated values based on USB specifications.

Note: Stresses above those listed may cause permanent damage to the device. This is a stress rating only, and functional operation of the devices at or exceeding the conditions in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.