MM54C240 and MM74C240 are eight-channel buffers and line drivers with TRI-STATE outputs, specially designed for driving capacitive loads such as bus systems.
These octal buffers and line drivers are monolithic CMOS integrated circuits with TRI‑STATE outputs, designed to drive highly capacitive loads and provide both inverting and non‑inverting functions. They feature a wide supply voltage range, high noise immunity, low power consumption, and TTL‑compatible inputs.
The document lists absolute maximum ratings, DC and AC electrical characteristics, propagation delays, output drive capabilities, truth tables, typical performance graphs, test circuits, and physical dimensions for both ceramic dual‑in‑line (J) and molded dual‑in‑line (N) packages.
| Supply voltage range | 3 V to 15 V |
|---|---|
| Typical propagation delay (MM74C244, 10 V, 50 pF) | 25 ns |
| Input high voltage (5 V supply) | 3.5 V |
| Input low voltage (5 V supply) | 1.5 V |
| Output source current (P‑Channel) | 30 mA |
| Output sink current (N‑Channel) | 20 mA |
Typical propagation delay is 25 ns for the MM74C244 at 10 V with a 50 pF load.
The input high voltage must be at least 3.5 V when VCC is 5 V.