The IDT octal bidirectional transceivers are fast CMOS devices with performance equivalent to FAST speed and drive. There are three different versions, with speeds 25% or 40% faster than FAST. They are compatible with TTL input/output levels and CMOS output levels. The devices have an IOL of 64mA (commercial) and 48mA (military), and maximum input current of 5µA. The products comply with MIL-STD-883 Class B and DESC standards. They meet or exceed JEDEC Standard 18 specifications.
The FAST CMOS octal bidirectional transceivers from Integrated Device Technology provide high‑speed, low‑power data bus interfacing. Variants include non‑inverting (245, 645) and inverting (640) options, with features such as 64 mA commercial output current, 5 µA input leakage, and radiation‑tolerant versions.
The datasheet lists absolute maximum ratings, DC electrical characteristics, power‑supply behavior, and switching timing for commercial (0 °C to +70 °C) and military (‑55 °C to +125 °C) temperature ranges, along with pin configurations, test circuits, and ordering information.
| Output current (IOL) | 64 mA commercial, 48 mA military |
|---|---|
| Input current leakage | 5 µA max |
| Commercial operating temperature | 0 °C to +70 °C |
| Military operating temperature | ‑55 °C to +125 °C |
The devices can source up to 64 mA in the commercial version and 48 mA in the military version.
The transmit/receive (T/R) input determines whether data moves from port A to B or from B to A.