1.Functional Description 

• Octal Bus Buffer

74HC240D: INVERTED, 3-STATE OUTPUTS

74HC244D: NON-INVERTED, 3-STATE OUTPUTS

2. General

 The 74HC240D and 74HC244D are high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate C

2MOS

technology.

 They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power

dissipation.

 The 74HC240D is an inverting 3-state buffer and the 74HC244D are non-inverting 3-state buffers having two

active-low output enables.

 These devices are designed to be used with 3-state memory address drivers, etc.

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

3. Features

(1) Wide operating temperature range: Topr = -40 to 125

� (Note 1)

(2) High speed: tpd = 10 ns (typ.) at VCC = 6.0 V

(3) Low power dissipation: ICC = 4.0

µA (max) at T

a = 25

�

(4) Balanced propagation delays: tPLH

≈ tPHL

(5) Wide operating voltage range: VCC(opr) = 2.0 V to 6.0 V

Note1 1:Operating Range spec of Topr = -40

� to 125

� is applicable only for the products which manufactured after

July 2020.