MM74HC240

Features:

Typical propagation delay: 12 ns
3-STATE outputs for connection to system buses
Wide power supply range: 26V
Low quiescent supply current: 80 A (74 Series)
Output current: 6 mA


Specifications

Supply Voltage (V_CC) ........................................ −0.5 to +7.0V
DC Input Voltage (V_IN) ...................................... −1.5 to V_CC +1.5V
DC Output Voltage (V_OUT) ................................. −0.5 to V_CC +0.5V
Clamp Diode Current (I_IK, I_OK) .......................... ±20 mA
DC Output Current, per pin (I_OUT) ..................... ±35 mA
DC VCC or GND Current, per pin (I_CC).................  ±70 mA
Storage Temperature Range (T_STG) ................... −65°C to +150°C
Power Dissipation (P_D)
  (Note 3) 600 mW
  S.O. Package only ............................................ 500 mW
Lead Temperature (T_L)
  (Soldering 10 seconds) .................................... 260°C

Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Note 2: unless otherwise specified all voltages are referenced to ground.
Note 3: Power Dissipation temperature derating - plastic "N" package: − 12 mW/°C from 65°C to 85°C.


Description

The MM74HC240 3-STATE buffer utilizes advanced silicon- gate CMOS technology. It possesses high drive current outputs which enable high speed operation even when driving large bus capacitances. These circuits of MM74HC240 achieve speeds comparable to low power Schottky devices, while retaining the advantage of CMOS circuitry, i.e., high noise immunity and low power consumption. It has a fanout of 15 LS-TTL equivalent inputs.

The MM74HC240 is an inverting buffer and has two active LOW enables (1G and 2G). Each enable independently controls 4 buffers.

All inputs of MM74HC240 are protected from damage due to static discharge by diodes to V_CC and ground.