四路总线缓冲器（三态） QUAD BUS BUFFERS 3-STATE
DESCRIPTION
The 74VHC125 is an advanced high-speed CMOS QUAD BUS BUFFERS fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.
The device requires the 3-STATE control input G to be set high to place the output in to the high impedance state.
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 = 3.8ns 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 = 8mA MIN
■ BALANCED PROPAGATION DELAYS:
tPLH = tPHL
■ OPERATING VOLTAGE RANGE:
VCCOPR = 2V to 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 125
■ IMPROVED LATCH-UP IMMUNITY
■ LOW NOISE: VOLP = 0.8V MAX.