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SN74LS398DW датащи(PDF) 1 Page - Motorola, Inc |
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SN74LS398DW датащи(HTML) 1 Page - Motorola, Inc |
1 / 6 page 5-557 FAST AND LS TTL DATA QUAD 2-PORT REGISTER The SN54 / 74LS398 and SN54 / 74LS399 are Quad 2-Port Registers. They are the logical equivalent of a quad 2-input multiplexer followed by a quad 4-bit edge-triggered register. A Common Select input selects between two 4-bit in- put ports (data sources). The selected data is transferred to the output register on the LOW-to-HIGH transition of the Clock input. The SN54/ 74LS398 fea- tures both Q and Q inputs, while the SN54 / 74LS399 has only Q outputs. • Select From Two Data Sources • Fully Positive Edge-Triggered Operation • Both True and Complemented Outputs on SN54/74LS398 • Input Clamp Diodes Limit High-Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) 18 17 16 15 14 13 1 2 3 4 5 6 7 20 19 8 VCC S Qd Qd Iod I1d I0c I1c Qc Qa Qa I0a I1a I1b I0b Qb 9 10 Qb GND 12 11 Qc CP VCC = PIN 20 GND = PIN 10 SN54 / 74LS398 14 13 12 11 10 9 1 2 3 4 5 6 7 16 15 8 VCC S Qd I0d I1d I1c Qc I0c CP Qa I0a I1a I1b I0b Qb GND VCC = PIN 16 GND = PIN 8 SN54 / 74LS399 PIN NAMES LOADING (Note a) HIGH LOW S Common Select Input 0.5 U.L. 0.25 U.L. CP Clock (Active HIGH Going Edge) Input 0.5 U.L. 0.25 U.L. I0a – I0d Data Inputs From Source 0 0.5 U.L. 0.25 U.L. I1a – I0d Data Inputs From Source 1 0.5 U.L. 0.25 U.L. Qa – Qd Register True Outputs (Note b) 10 U.L. 5 (2.5) U.L. Qa – Qd Register Complementary Outputs (Note b) 10 U.L. 5 (2.5) U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges. SN54/74LS398 SN54/74LS399 QUAD 2-PORT REGISTER LOW POWER SCHOTTKY ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC SN74LSXXXD SOIC J SUFFIX CERAMIC CASE 620-09 N SUFFIX PLASTIC CASE 648-08 16 1 16 1 16 1 D SUFFIX SOIC CASE 751B-03 20 1 J SUFFIX CERAMIC CASE 732-03 20 1 N SUFFIX PLASTIC CASE 738-03 20 1 DW SUFFIX SOIC CASE 751D-03 |
Аналогичный номер детали - SN74LS398DW |
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Аналогичное описание - SN74LS398DW |
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