This document describes the IDT octal bidirectional transceiver product series, which are built using advanced dual metal CMOS technology. These products are designed for asynchronous two-way communication between data buses. They have transmit/receive input to determine the data flow direction, and output enable input to disable both A and B ports. The series features low power consumption, true TTL input and output compatibility, etc.
The FAST CMOS octal bidirectional transceiver family from Integrated Device Technology (IDT) offers high‑drive, low‑leakage, TTL‑compatible I/O for asynchronous two‑way data bus communication. Models FCT245T, FCT2245T, FCT640T and FCT645T differ in output polarity and drive capability, with the 2245T providing balanced‑drive outputs with built‑in current limiting.
Key features include low input/output leakage (≤1 µA), CMOS power levels, true TTL compatibility, and availability in radiation‑tolerant and radiation‑enhanced versions. The devices are qualified for both commercial (0 °C to +70 °C) and military (‑55 °C to +125 °C) temperature ranges and are offered in a variety of packages such as DIP, SOIC, SSOP, QSOP, CERPACK and LCC.
| Input leakage current | ≤1 µA (max) |
|---|---|
| Output high voltage (typical) | 3.3 V |
| Output low voltage (typical) | 0.3 V |
| High‑drive output current | -15 mA I_OH, 64 mA I_OL |
| Commercial temperature range | 0 °C to +70 °C |
| Supply voltage (commercial) | 5.0 V ± 5 % |
| Package options | DIP, SOIC, SSOP, QSOP, CERPACK, LCC |
The maximum input and output leakage current is ≤1 µA.
They are available in DIP, SOIC, SSOP, QSOP, CERPACK and LCC packages.
Typical V_OH is 3.3 V and typical V_OL is 0.3 V.