742 series TTL IC's with integrated 25R resistors: 742xxx 7425xxx
Fast bus driver TTL IC's with integrated 25R series resistors for for damping when driving large capacitive loads. Most also have center GND and VCC pins for reducing ground bounce.
+---+--+---+ /1OE |1 +--+ 20| VCC 1A1 |2 19| /2OE /2Y4 |3 18| /1Y1 1A2 |4 17| 2A4 /2Y3 |5 742 16| /1Y2 1A3 |6 240 15| 2A3 /2Y2 |7 14| /1Y3 1A4 |8 13| 2A2 /2Y1 |9 12| /1Y4 GND |10 11| 2A1 +----------+
+---+--+---+ /1OE |1 +--+ 20| VCC 1A4 |2 19| 2OE 2Y1 |3 18| 1Y1 1A3 |4 17| 2A4 2Y2 |5 742 16| 1Y2 1A2 |6 241 15| 2A3 2Y3 |7 14| 1Y3 1A1 |8 13| 2A2 2Y4 |9 12| 1Y4 GND |10 11| 2A1 +----------+
+---+--+---+ /1OE |1 +--+ 20| VCC 1A1 |2 19| /2OE 2Y4 |3 18| 1Y1 1A2 |4 17| 2A4 2Y3 |5 742 16| 1Y2 1A3 |6 244 15| 2A3 2Y2 |7 14| 1Y3 1A4 |8 13| 2A2 2Y1 |9 12| 1Y4 GND |10 11| 2A1 +----------+
+---+--+---+ +---+---*---+---+ DIR |1 +--+ 20| VCC |/EN|DIR| A | B | A0 |2 19| /EN +===+===*===+===+ A1 |3 18| B0 | 1 | X | Z | Z | A2 |4 17| B1 | 0 | 0 | B | Z | A3 |5 742 16| B2 | 0 | 1 | Z | A | A4 |6 245 15| B3 +---+---*---+---+ A5 |7 14| B4 A6 |8 13| B5 A7 |9 12| B6 GND |10 11| B7 +----------+
+---+--+---+ A1 |1 +--+ 28| A6 A2 |2 27| A7 A3 |3 26| A8 A4 |4 25| A9 A5 |5 24| A10 /OE1 |6 23| A11 VCC |7 742 22| GND GND |8 410 21| GND /OE2 |9 20| Y11 Y5 |10 19| Y10 Y4 |11 18| Y9 Y3 |12 17| Y8 Y2 |13 16| Y7 Y1 |14 15| Y6 +----------+
+---+--+---+ A1 |1 +--+ 28| A6 A2 |2 27| A7 A3 |3 26| A8 A4 |4 25| A9 A5 |5 24| A10 /OE1 |6 23| A11 VCC |7 742 22| GND GND |8 411 21| GND /OE2 |9 20|/Y11 /Y5 |10 19|/Y10 /Y4 |11 18|/Y9 /Y3 |12 17|/Y8 /Y2 |13 16|/Y7 /Y1 |14 15|/Y6 +----------+
+---+--+---+ +---+---+---*---+ /OE |1 +--+ 20| VCC |/OE|CLK| D | Q | D1 |2 19| Q1 +===+===+===*===+ D2 |3 18| Q2 | 1 | X | X | Z | D3 |4 17| Q3 | 0 | / | 0 | 0 | D4 |5 742 16| Q4 | 0 | / | 1 | 1 | D5 |6 574 15| Q5 | 0 |!/ | X | - | D6 |7 14| Q6 +---+---+---*---+ D7 |8 13| Q7 D8 |9 12| Q8 GND |10 11| CLK +----------+
+---+--+---+ /OE1 |1 +--+ 24| VCC A1 |2 23| Y1 A2 |3 22| Y2 A3 |4 21| Y3 A4 |5 20| Y4 A5 |6 742 19| Y5 A6 |7 827 18| Y6 A7 |8 17| Y7 A8 |9 16| Y8 A9 |10 15| Y9 A10 |11 14| Y10 GND |12 13| /OE2 +----------+
+---+--+---+ /OE1 |1 +--+ 24| VCC A1 |2 23| /Y1 A2 |3 22| /Y2 A3 |4 21| /Y3 A4 |5 20| /Y4 A5 |6 742 19| /Y5 A6 |7 828 18| /Y6 A7 |8 17| /Y7 A8 |9 16| /Y8 A9 |10 15| /Y9 A10 |11 14| /Y10 GND |12 13| /OE2 +----------+
+---+--+---+ B8 |1 +--+ 24| VCC B7 |2 23| A8 B6 |3 22| A7 B5 |4 21| A6 B4 |5 20| A5 B3 |6 742 19| A4 B2 |7 952 18| A3 B1 |8 17| A2 /OEAB |9 16| A1 CLKAB |10 15| /OEBA /CEAB |11 14| CLKBA GND |12 13| /CEBA +----------+
+---+--+---+ B8 |1 +--+ 24| VCC B7 |2 23| A8 B6 |3 22| A7 B5 |4 21| A6 B4 |5 20| A5 B3 |6 742 19| A4 B2 |7 953 18| A3 B1 |8 17| A2 /OEAB |9 16| A1 CLKAB |10 15| /OEBA /CEAB |11 14| CLKBA GND |12 13| /CEBA +----------+
+---+--+---+ /1Y1 |1 +--+ 24| /1OE GND |2 23| 1A1 /1Y2 |3 22| 1A2 /1Y3 |4 21| VCC GND |5 20| 1A3 /1Y4 |6 7425 19| 1A4 /2Y1 |7 240 18| 2A1 GND |8 17| 2A2 /2Y2 |9 16| VCC /2Y3 |10 15| 2A3 GND |11 14| 2A4 /2Y4 |12 13| /2OE +----------+
+---+--+---+ 1Y1 |1 +--+ 24| /1OE GND |2 23| 1A1 1Y2 |3 22| 1A2 1Y3 |4 21| VCC GND |5 20| 1A3 1Y4 |6 7425 19| 1A4 2Y1 |7 240 18| 2A1 GND |8 17| 2A2 2Y2 |9 16| VCC 2Y3 |10 15| 2A3 GND |11 14| 2A4 2Y4 |12 13| /2OE +----------+
+---+--+---+ +---+---*---+---+ A1 |1 +--+ 24| DIR |/EN|DIR| A | B | GND |2 23| B1 +===+===*===+===+ A2 |3 22| B2 | 1 | X | Z | Z | A3 |4 21| VCC | 0 | 0 | B | Z | GND |5 20| B3 | 0 | 1 | Z | A | A4 |6 7425 19| B4 +---+---*---+---+ A5 |7 245 18| B5 GND |8 17| B6 A6 |9 16| VCC A7 |10 15| B7 GND |11 14| B8 A8 |12 13| /EN +----------+
+---+--+---+ A1 |1 +--+ 24| DIR GND |2 23| B1 A2 |3 22| B2 A3 |4 21| VCC GND |5 20| B3 A4 |6 7425 19| B4 A5 |7 642 18| B5 GND |8 17| B6 A6 |9 16| VCC A7 |10 15| B7 GND |11 14| B8 A8 |12 13| /OE +----------+
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