Part # 54ABT16500 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: 54ABT16500 18-Bit Universal Bus Transceivers with TRI-STATE® Outputs

Part Details:

54ABT16500 July 1998 54ABT1650018-Bit Universal Bus Transceivers with TRI-STATE® 18-Bit OutputsGeneral Description To ensure the high-impedance state during power up orpower down, OE should be tied to GND through a pulldown Universal These 18-bit universal bus transceivers combine D-type resistor; the minimum value of the resistor is determined by latches and D-type flip-flops to allow data flow in transparent, the current-sourcing capability of the driver. latched, and clocked modes. Data flow in each direction is controlled by output-enable Features (OEAB and OEBA), latch-enable (LEAB and LEBA), andclock (CLKAB and CLKBA) inputs. For A-to-B data flow, the n Combines D-Type latches and D-Type flip-flops for operation in transparent, latched, or clocked mode device operates in the transparent mode when LEAB is high. Bus When LEAB is low, the A data is latched if CLKAB is held at n Flow-through architecture optimizes PCB layout a high or low logic level. If LEAB is low, the A bus data is n Guaranteed latch-up protection stored in the latch/flip-flop on the high-to-low transition of n High impedance glitch free bus loading during entire T CLKAB. Output-enable OEAB is active-high. When OEAB is power up and power down cycle ransceivers high, the outputs are active. When OEAB is low, the outputs n Non-destructive hot insertion capability are in the high-impedance state. n Standard Microcircuit Drawing (SMD) 5962-9687001 Data flow for B to A is similar to that of A to B but uses OEBA,LEBA, and CLKBA. The output enables are complementary(OEAB is active high and OEBA is active low). Ordering Code with Military Package Package Description Number TRI-ST 54ABT16500W-QML WA56A 56-Lead Cerpack ATEOutputs TRI-STATE® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS100225 Connection Diagram Pin Assignment for Cerpack 54ABT16500 DS100225-1 Function Table (Note 1)

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