DESCRIPTION
●The 74VHCT244A is an advanced high-speed CMOS OCTAL BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. G enable input governs four BUS BUFFERs.
●This device is designed to be used with 3 state memory address drivers, etc.
●Power down protection is provided on all inputs and outputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V since all inputs are equipped with TTL threshold.
●All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
●■ HIGH SPEED: tPD = 5.4 ns (TYP.) at VCC = 5V
●■ LOW POWER DISSIPATION:
● ICC = 4 µA (MAX.) at TA=25°C
●■ COMPATIBLE WITH TTL OUTPUTS:
● VIH = 2V (MIN.), VIL = 0.8V (MAX)
●■ POWER DOWN PROTECTION ON INPUTS & OUTPUTS
●■ SYMMETRICAL OUTPUT IMPEDANCE:
● |IOH| = IOL = 8 mA (MIN)
●■ BALANCED PROPAGATION DELAYS:
● tPLH = tPHL
●■ OPERATING VOLTAGE RANGE:
● VCC(OPR) = 4.5V to 5.5V
●■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244
●■ IMPROVED LATCH-UP IMMUNITY
●■ LOW NOISE: VOLP = 0.9V (MAX.)
