CP2102

Part: Silicon Labs CP2102/CP2109

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

Description: Highly-integrated USB-to-UART Bridge Controller with USB 2.0 full-speed, up to 921.6 kbps UART, integrated transceiver, oscillator, and programmable ROM, in a 5x5 mm QFN-28 package.

Operating Conditions:

• Supply voltage: 3.0–3.6 V (VDD)
• Operating temperature: -40 to +85 °C
• Max UART baud rate: 921600 bps
• USB speed: Full-speed (12 Mbps)

Absolute Maximum Ratings:

• Max supply voltage: 4.2 V (VDD)
• Max continuous current: 500 mA (through VDD and GND)
• Max junction/storage temperature: 150 °C

Key Specs:

• UART Baud Rate (Max): 921600 bps
• CP2102 VDD Output Voltage: 3.0–3.6 V (Typ 3.3 V) @ 1 to 100 mA
• CP2109 VDD Output Voltage: 3.3–3.6 V (Typ 3.45 V) @ 1 to 100 mA
• CP2102 Normal Supply Current: 20 mA (Typ), 26 mA (Max) @ V REG Enabled
• CP2109 Normal Supply Current: 17 mA (Typ), 23 mA (Max) @ V REG Enabled
• USB Full-Speed Output Rise Time: 4 ns (Min), 20 ns (Max)
• USB Full-Speed Output Fall Time: 4 ns (Min), 20 ns (Max)
• USB Pull-up Resistance (Full Speed D+): 1.425–1.575 kΩ

Features:

• Integrated USB transceiver; no external resistors required
• Internal 1024-byte programmable ROM for vendor ID, product ID, serial number, power descriptor, release number, and product description strings
• Integrated clock; no external crystal required
• On-chip power-on reset circuit
• On-chip voltage regulator (3.3 V output for CP2102, 3.45 V output for CP2109)
• USB Specification 2.0 compliant; full-speed (12 Mbps)
• UART data bits: 5, 6, 7, and 8
• UART stop bits: 1, 1.5, and 2
• UART parity: odd, even, mark, space, no parity
• 576 Byte receive buffer; 640 byte transmit buffer
• Hardware or X-On/X-Off handshaking supported

Applications:

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

Package:

• 28-pin QFN (5x5 mm)

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

Table 2. Absolute Maximum Ratings

Note: Stresses above those listed may cause permanent device damage. 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.

Table 2. Absolute Maximum Ratings

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

1. The USB Pull-up supply current values are calculated values based on USB specifications. USB Pull-up supply current is current flowing from V DD to GND through USB pull-down/pull-up resistors on D+ and D-.
2. Thermal resistance assumes a multi-layer PCB with any exposed pad soldered to a PCB pad.
3. USB Pull-up current should be added for total supply current. Normal and suspended supply current is current flowing into V REGIN . Normal and suspended supply current is guaranteed by characterization.