DM74AS245

DM74AS245 Octal Bus Transceiver with 3-STATE Outputs October 1986 Revised February 2000 DM74AS245 Octal Bus Transceiver with 3-STATE Outputs General Description This advanced Schottky device contains 8 pairs of 3-STATE logic elements configured as octal bus transceivers. These circuits are designed for use in memory, microprocessor systems and in asynchronous bidirectional data buses. Two way communication between buses is controlled by the (DIR) input. Data transmits either from the A bus to the B bus or from the B bus to the A bus. Both the driver and receiver outputs can be disabled via the (G) enable input which causes outputs to enter the high impedance mode so that the buses are effectively isolated. Features s Advanced oxide-isolated, ion-implanted Schottky TTL process s Non-inverting logic output s 3-STATE outputs independently controlled on A and B buses s Low output impedance to drive terminated transmission lines to 133Ω s Switching response specified into 500Ω/50 pF s Specified to interface with CMOS at VOH = VCC − 2V s PNP inputs reduce input loading s Switching specifications guaranteed over full temperature and VCC range Ordering Code: Order Number DM74AS245WM DM74AS245SJ DM74AS245N Package Number M20B M20D N20A 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 Devices also available...