SN74ALS540NSR.A中文资料德州仪器数据手册PDF规格书

3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

pnp Inputs Reduce dc Loading

Data Flowthrough Pinout (All Inputs on

Opposite Side From Outputs)

description

These octal buffers and line drivers are designed

to have the performance of the popular

SN54ALS240A/SN74ALS240A series and, at

the same time, offer a pinout with inputs and

outputs on opposite sides of the package. This

arrangement greatly facilitates printed circuit

board layout.

The 3-state control gate is a 2-input NOR gate

such that, if either output-enable (OE1 or OE2)

input is high, all eight outputs are in the

high-impedance state.

The SN74ALS540 provides inverted data. The

’ALS541 provide true data at the outputs.

The -1 versions of SN74ALS540 and

SN74ALS541 are identical to the standard

versions, except that the recommended

maximum IOL is increased to 48 mA. There is no

-1 version of the SN54ALS541.