具有三态输出八路总线缓冲器（非反相） OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED
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:
VCCOPR = 2V to 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244
■ IMPROVED LATCH-UP IMMUNITY
■ LOW NOISE: VOLP = 0.9V MAX.