M74HC7240B1R中文资料意法半导体数据手册PDF规格书

DESCRIPTION

The M54/74HC7240, HC7241andHC7244 are high speed CMOS OCTAL BUS BUFFERs fabricated in silicon gate C2MOS technology.

They have the same high speed performance of LSTTL combined with true CMOS low power consumption.

The designer has a choise of select combination of inverting and non-inverting outputs, symmetrical G (active low output control) input, and complementary G and G inputs. Each control input governs four BUS BUFFERs.

The HC7240, HC7241 and HC7244 have the same pin configuration and function as the HC240, HC241 and HC244 and they have a hysteresis characteristics with each input so can be used as a line receiver, etc.

All inputs are equipped with protection circuits against static discharge and transient excess voltage.

■ HIGH SPEED tPD = 15 ns (TYP.) at VCC = 5V

■ LOW POWER DISSIPATION ICC = 4 µA (MAX.) at TA = 25 °C

■ HIGH NOISE IMMUNITY VH = 1.1 V(TYP.) at VCC = 5V

■ OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS

■ SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 6 mA (MIN)

■ BALANCED PROPAGATION DELAYS tPLH = tPHL

■ WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2V to 6V

■ PIN AND FUNCTION COMPATIBLE WITH 54/74LS240/241/244