74VHCV244FT中文資料東芝數(shù)據(jù)手冊(cè)PDF規(guī)格書

Functional Description

? Octal Schmitt Bus Buffer

74VHCV240FT: Inverted, 3-State Outputs

74VHCV244FT: Non-Inverted, 3-State Outputs

General

The 74VHCV240FT and 74VHCV244FT are advanced high speed CMOS OCTAL BUS BUFFERs fabricated with

silicon gate C2MOS technology.

They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS

low power dissipation.

The 74VHCV240FT is an inverting 3-state buffer having two active-low output enables. The 74VHCV244FT is

a non-inverting 3-state buffer, and has two active-low output enables.

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

An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply

voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up.

This circuit prevents device destruction due to mismatched supply and input voltages.

Features

(1) AEC-Q100 (Rev. H) (Note 1)

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

(3) High speed: tpd = 3.9 ns (typ.) at VCC = 5.0 V

(4) Low power dissipation: ICC = 2.0 μA (max) at Ta = 25 

(5) Wide operating voltage range: VCC(opr) = 1.8 V to 5.5 V

(6) Output current: |IOH|/IOL = 16 mA (min)(VCC = 4.5 V)

(7) Power-down protection provided on all inputs.

(8) Pin and function compatible with the 74 series (74AC/HC/AHC/LV etc.) 240 or 244 type.