|   | 74HC21DR | Dual 4-input AND gate | SOIC-14 | NXP Semiconductors |  |  | 
								
									
										|   | 74HC237N | 3-to-8 line decoder, demultiplexer with address latches | DIP-16 | NXP Semiconductors |  |  | 
								
									
										|   | 74HC257D | Quad 2-input multiplexer; 3-state | SOIC-16 | NXP Semiconductors |  |  | 
								
									
										|   | 74HC257D | Quad 2-input multiplexer; 3-state | SOIC-16 | NXP Semiconductors |  |  | 
								
									
										|   | 74HC257DB | Quad 2-input multiplexer; 3-state | SSOP-16 | NXP Semiconductors |  |  | 
								
									
										|   | 74HC257DB | Quad 2-input multiplexer; 3-state | SSOP-16 | NXP Semiconductors |  |  |