The FT245BL is the lead free version of the 2nd generation of FTDI’s popular USB FIFO I.C. This device not only adds extra functionality to its FT8U245AM predecessor and reduces external component count, but also maintains a high degree of pin compatibility with the original, making it easy to upgrade or cost reduce existing designs as well as increasing the potential for using the device in new application areas.
The FT245BL is FTDI's lead‑free, second‑generation USB‑FIFO IC that provides a bi‑directional parallel interface with full USB protocol handling on‑chip. It adds new functionality over the FT8U245AM, maintains pin compatibility, and supports both USB 1.1 and USB 2.0.
The document describes hardware features, block diagrams, pin‑out tables, signal descriptions, and revision history. It also lists electrical specifications, supported drivers, and application areas such as MCU/FPGA interfacing, USB instrumentation, and audio/video data transfer.
| Maximum data transfer rate (D2XX drivers) | 1 MB/s |
|---|---|
| Maximum data transfer rate (VCP drivers) | 300 KB/s |
| Transmit FIFO buffer size | 384 bytes |
| Receive FIFO buffer size | 128 bytes |
| Supply voltage range | 4.35 V to 5.25 V |
| Package type | 32‑lead LQFP (lead‑free, RoHS compliant) |
| USB compatibility | USB 1.1 and USB 2.0 |
| Clock multiplier | 6 MHz – 48 MHz PLL |
| Integrated 3.3 V regulator | Provides 3.3 V for USB I/O |
| Suspend current (typical) | < 100 µA |
Using FTDI’s D2XX drivers the device can transfer up to 1 MB per second, while the VCP drivers support up to 300 KB per second.
The FT245BL operates from a single supply voltage between 4.35 V and 5.25 V.
The transmit FIFO buffer holds 384 bytes and the receive FIFO buffer holds 128 bytes.
Yes, the device is compatible with both USB 1.1 and USB 2.0 specifications.