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54F646BSCQB 数据表(PDF) 1 Page - National Semiconductor (TI) |
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54F646BSCQB 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page TLF9580 December 1994 54F74F646 74F646B 54F74F648 Octal TransceiverRegister with TRI-STATE Outputs General Description These devices consist of bus transceiver circuits with TRI- STATE D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes to a high logic level Control G and direction pins are provid- ed to control the transceiver function In the transceiver mode data present at the high impedance port may be stored in either the A or the B register or in both The select controls can multiplex stored and real-time (transparent mode) data The direction control determines which bus will receive data when the enable control G is Active LOW In the isolation mode (control G HIGH) A data may be stored in the B register andor B data may be stored in the A regis- ter Features Y Independent registers for A and B buses Y Multiplexed real-time and stored data Y ’F648 has inverting data paths Y ’F646’F646B have non-inverting data paths Y ’F646B is a faster version of the ’F646 Y TRI-STATE outputs Y 300 mil slim DIP Y Guaranteed 4000V minimum ESD protection Commercial Military Package Package Description Number 74F646SPC N24C 24-Lead (0300 Wide) Molded Dual-In-Line 54F646DM (Note 2) J24F 24-Lead (0300 Wide) Ceramic Dual-In-Line 74F646SC (Note 1) M24B 24-Lead (0300 Wide) Molded Small Outline JEDEC 74F646MSA (Note 1) MSA24 24-Lead Molded Shrink Small Outline EIAJ Type II 54F646FM (Note 2) W24C 24-Lead Cerpack 54F646LM (Note 2) E28A 28-Lead Ceramic Leadless Chip Carrier Type C 74F646BSPC N24C 24-Lead (0300 Wide) Molded Dual-In-Line 74F646BSC (Note 1) M24B 24-Lead (0300 Wide) Molded Small Outline JEDEC 74F648SPC N24C 24-Lead (0300 Wide) Molded Dual-In-Line 54F648SDM (Note 2) J24F 24-Lead (0300 Wide) Ceramic Dual-In-Line 74F648SC (Note 1) M24B 24-Lead (0300 Wide) Molded Small Outline JEDEC 54F648FM (Note 2) W24C 24-Lead Cerpack 54F648LM (Note 2) E28A 24-Lead Ceramic Leadless Chip Carrier Type C Note 1 Devices also available in 13 reel Use suffix e SCX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB Logic Symbols ’F646’F646B TLF9580 – 1 ’F648 TLF9580 – 7 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation RRD-B30M75Printed in U S A |
类似零件编号 - 54F646BSCQB |
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类似说明 - 54F646BSCQB |
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