SN74AHC245集成電路（IC）的緩沖器驅(qū)動(dòng)器接收器收發(fā)器規(guī)格書(shū)PDF中文資料

SN74AHC245屬于集成電路（IC）的緩沖器驅(qū)動(dòng)器接收器收發(fā)器。由德州儀器制造生產(chǎn)的SN74AHC245緩沖器，驅(qū)動(dòng)器，接收器，收發(fā)器邏輯緩沖器、驅(qū)動(dòng)器、接收器和收發(fā)器允許隔離對(duì)某個(gè)電路的邏輯信號(hào)的訪問(wèn)，以用于另一電路。緩沖器將其輸入信號(hào)（不變或反相）傳遞到其輸出，并可能用于清除弱信號(hào)或驅(qū)動(dòng)負(fù)載。在布爾邏輯仿真器中，緩沖器主要用于增加傳播延遲。邏輯接收器和收發(fā)器允許在數(shù)據(jù)總線之間進(jìn)行隔離通信。

1 Features

? AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: –40°C to +125°C,

TA

– Device HBM ESD Classification Level 2

– Device CDM ESD Classifcation Level C6

? Operating range 2 V to 5.5 V VCC

? Latch-Up Performance Exceeds 250 mA Per JESD

17

2 Applications

? Enable or disable a digital signal

? Hold a signal during controller reset

? Debounce a switch

3 Description

The SN74AHC245-Q1 octal bus transceiver

is designed for asynchronous two-way

communication between data buses. The controlfunction

implementation minimizes external timing

requirements. This device allows data transmission

from the A bus to the B bus or from the B bus

to the A bus, depending on the logic level at the

direction-control (DIR) input. The output-enable (OE)

input can be used to disable the device so that the

buses effectively are isolated.

To ensure the high-impedance state during power up

or power down, OE should be tied to VCC through

a pullup resistor; the minimum value of the resistor

is determined by the current-sinking capability of the

driver.