DM74ALS1240A Datasheet | Fairchild Semiconductor

Description These octal 3-STATE bus drivers are designed to provide the designer with flexibility in implementing a bus interface with memory, microprocessor, or munication systems, and are low power dissipation versions of the DM74ALS240A and DM74ALS241A. The output 3-STATE gating control is organized into two separate groups of four buffers. The DM74ALS1240A control inputs symmetrically enable the respective outputs when set logic LOW. The 3STATE 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. Features s Advanced oxide-isolated, ion-implanted Schottky TTL process s Switching response specified into 500Ω and 50 p F load s Switching response specifications guaranteed over full temperature and VCC supply range s PNP input design reduces input loading s Low power dissipation version s Low level drive current: 74ALS = 16 m A Ordering Code: Order Number DM74ALS1240AWM Package Number M20B Package Description 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 Logic Diagram Function Table Input G L L H A L H X Output Y H L Z H = HIGH Level Logic State L = LOW Level Logic State X = Don't Care (Either LOW or HIGH Level Logic State) Z = High Impedance (OFF) State © 2000 Fairchild Semiconductor Corporation DS006261 .fairchildsemi. Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Voltage Applied to Disabled Output Operating Free Air Temperature Range Storage Temperature Range Typical θJA N Package M Package 60.5°C/W 78.0°C/W 7V 7V 5.5V 0°C to +70°C - 65°C to +150°C Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these...