74AC646

74AC646 74ACT646 Octal Transceiver/Register with 3-STATE Outputs November 1988 Revised December 1998 74AC646 74ACT646 Octal Transceiver/Register with 3-STATE Outputs General Description The AC/ACT646 consist of registered bus transceiver circuits, with outputs, D-type flip-flops and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage registers. Data on the A or B bus will be loaded into the respective registers on the LOW-to-HIGH transition of the appropriate clock pin (CPAB or CPBA). The four fundamental data handling functions available are illustrated in Figure 1, Figure 2, Figure 3, and Figure 4. Features s Independent registers for A and B buses s Multiplexed real-time and stored data transfers s 3-STATE outputs s 300 mil dual-in-line package s Outputs source/sink 24 mA s ACT646 has TTL compatible inputs Ordering Code: Order Number 74AC646SC 74AC646SPC 74ACT646SPC Package Number M24B N24C N24C Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300” Wide 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300” Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols www.DataSheet4U.com Connection Diagram Pin Assignment for DIP and SOIC IEEE/IEC Pin Descriptions Pin Names A0–A7 B0–B7 CPAB, CPBA SAB, SBA G DIR FACT™ ...