The DP84240 and DP84244 are octal TRI-STATE drivers designed for heavy capacitive load applications such as fast data buffers or as memory address drivers. The DP84240 is an inverting driver which is pin-compatible with both the 74S240 and AM2965. The DP84244 is a non-inverting driver which is pin-compatible with the 74S244 and AM2966. These parts are fabricated using an oxide isolation process for much faster speeds and are specified for 250 pF and 500 pF load capacitances. TRI-STATE is a registered trademark of National Semiconductor Corp.
The DP84240 and DP84244 are octal TRI-STATE MOS drivers designed for heavy capacitive loads (250 pF and 500 pF). DP84240 is an inverting driver compatible with the 748240 and AM2965, while DP84244 is a non‑inverting driver compatible with the 748244 and AM2966. Both devices feature low static and dynamic input capacitance and symmetric rise/fall times.
The datasheet lists absolute maximum ratings, electrical characteristics such as supply voltage (4.5‑5.5 V), input and output voltage levels, propagation delays, and drive currents. It also includes switching test circuits, typical switching waveforms, power‑dissipation curves, and physical dimensions for the J‑type (J20A) and N‑type (N20A) 20‑lead dual‑in‑line packages. A life‑support policy disclaimer is provided at the end.
| Supply Voltage (Voc) | 4.5 V – 5.5 V |
|---|---|
| Logical “1” Input Voltage (V_IN) | 2.0 V (typ) |
| Drive Current (Typical) | 100 – 150 mA |
| Power Dissipation (Cavity Package) | 1150 mW |
The devices operate with a supply voltage between 4.5 V and 5.5 V.