SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS

SDAS214C - DECEMBER 1982 - REVISED AUGUST 1995

features

• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
• pnp Inputs Reduce dc Loading
• Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

description

These octal buffers/drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. When these devices are used with the ´ALS241, ´AS241A, ´ALS244, and ´AS244A, the circuit designer has a choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE\) inputs, and complementary OE and inputs. These devices feature high fan-out and improved fan-in.

The -1 version of SN74ALS240A is identical to the standard version, except that the recommended maximum I_OL for the -1 version is 48 mA. There is no -1 version of the SN54ALS240A.

The SN54ALS240A and SN54AS240A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS240A and SN74AS240A are characterized for operation from 0°C to 70°C.