SN74ALS620A屬于集成電路（IC）的緩沖器驅(qū)動器接收器收發(fā)器。由美國德州儀器公司制造生產(chǎn)的SN74ALS620A緩沖器，驅(qū)動器，接收器，收發(fā)器邏輯緩沖器、驅(qū)動器、接收器和收發(fā)器允許隔離對某個電路的邏輯信號的訪問，以用于另一電路。緩沖器將其輸入信號（不變或反相）傳遞到其輸出，并可能用于清除弱信號或驅(qū)動負載。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)總線之間進行隔離通信。

Local Bus-Latch Capability

Choice of True or Inverting Logic

Package Options Include Plastic

Small-Outline (DW) Packages and Standard

Plastic (N) 300-mil DIPs

description

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The

control-function implementation allows for maximum flexibility in timing.

These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending

upon the logic levels at the output-enable (OEAB and OEBA) inputs.

The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable

configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA.

Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA are enabled and

all other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total)

remain at their last states. The 8-bit codes appearing on the two sets of buses are identical for the

SN74ALS621A, SN74ALS623A, and SN74AS623 or complementary for the SN74ALS620A.

The -1 versions of the SN74ALS620A and SN74ALS621A are identical to the standard versions, except that

the recommended maximum IOL is increased to 48 mA in the -1 versions.

The SN74ALS620A, SN74ALS621A, SN74ALS623A, and SN74AS623 are characterized for operation from

0°C to 70°C.