74VHC244TTR Datasheet PDF - ST Microelectronics

DESCRIPTION

●The 74VHC244 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 output enable 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 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.

●All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.

●■ HIGH SPEED: tPD = 3.9 ns (TYP.) at VCC = 5V

●■ LOW POWER DISSIPATION:

●   ICC = 4 µA (MAX.) at TA=25°C

●■ HIGH NOISE IMMUNITY:

●   VNIH = VNIL = 28% VCC (MIN.)

●■ POWER DOWN PROTECTION ON INPUTS

●■ SYMMETRICAL OUTPUT IMPEDANCE:

●   |IOH| = IOL = 8 mA (MIN)

●■ BALANCED PROPAGATION DELAYS:

●   tPLH = tPHL

●■ OPERATING VOLTAGE RANGE:

●   VCC(OPR) = 2V to 5.5V

●■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244

●■ IMPROVED LATCH-UP IMMUNITY

●■ LOW NOISE: VOLP = 0.9V (MAX.)