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DM74AS245SJ Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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DM74AS245SJ Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 5 page © 2000 Fairchild Semiconductor Corporation DS006299 www.fairchildsemi.com 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 transceiv- ers. These circuits are designed for use in memory, micro- processor systems and in asynchronous bidirectional data buses. Two way communication between buses is con- trolled 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 imped- ance 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 133 Ω s Switching response specified into 500 Ω/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: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Order Number Package Number Package Description DM74AS245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide DM74AS245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74AS245N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Control Inputs Operation G DIR L L B Data to A Bus L H A Data to B Bus H X Hi-Z |
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