DM74ALS240A

DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver

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DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver

May 2007

DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Features
Advanced low power oxide-isolated ion-implanted

General Description
These octal 3-STATE bus drivers are designed to provide the designer with flexibility in implementing a bus interface with memory, microprocessor, or communication systems. The output 3-STATE gating control is organized into two separate groups of four buffers. The DM74ALS240A control inputs symmetrically enable the respective outputs when set logic LOW, while the DM74ALS241A has complementary enable gating. The 3-STATE circuitry contains a feature that maintains the buffer outputs in 3-STATE (high impedance state) during power supply ramp-up or ramp-down. This eliminates bus glitching problems that arise during power-up and power-down.

Schottky TTL process Functional and pin compatible with the DM74LS counterpart Improved switching performance with less power dissipation compared with the DM74LS counterpart Switching response specified into 500 and 50pF load Switching response specifications guaranteed over full temperature and VCC supply range PNP input design reduces input loading Low level drive current: 74ALS 24mA

Ordering Information
Order Number
DM74ALS240AWM DM74ALS240ASJ DM74ALS240AN DM74ALS241AWM

Package Number
M20B M20D N20A M20B

Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.

Connection Diagram
DM74ALS240A DM74ALS241A

1986 Fairchild Semiconductor Corporation DM74ALS240A, DM74ALS241A Rev. 1.2

www.fairchildsemi.com