2:1:9 TTL Clock Driver, 28 LEAD PLCC, 37-TUBE
28-Pin PLCC Clock Multiplexer, 9 Outputs, TTL, 4.75-5.25V, -0 to 85°C
Single-Ended Clock Buffer, 5V, 7.2ns Propagation Delay, PLCC-28
28-Pin Quad Clock Driver, 5V, 5.25V, 4.75V, 85°C, 0°C, S-PQCC-J28