CD74AC257 Datasheet | Texas Instruments

Features Description - ’AC257, ’ACT257- - . . . Non-Inverting Outputs - CD74ACT258 - - - . . . . Inverting Outputs - Buffered Inputs - Typical Propagation Delay - 4.4ns at VCC = 5V, TA = 25o C, CL = 50p F - Exceeds 2k V ESD Protection MIL-STD-883, Method 3015 - SCR-Latchup-Resistant CMOS Process and Circuit Design - Speed of Bipolar FAST™/AS/S with Significantly Reduced Power Consumption The ’AC257, ’ACT257 and CD74ACT258 are quad 2-input multiplexers with three-state outputs that utilize Advanced CMOS Logic technology. Each of these devices selects four bits of data from two sources under the control of a mon Select input (S). The Output Enable (OE) is active LOW. When OE is HIGH, all of the outputs (Y or Y) are in the highimpedance state regardless of all other input conditions. Moving data from two groups of registers to four mon output buses is a mon use of the ’AC257, ’ACT257, and CD74ACT258. The state of the Select input determines the particular register from which the data es. The ’AC257, ’ACT257 and CD74ACT258 can also be used as function generators. - Balanced Propagation Delays - AC Types Feature 1.5V to 5.5V Operation and Balanced Noise Immunity at 30% of the Supply - ±24m A Output Drive Current - Fanout to 15 FAST™ ICs Drives 50Ω Transmission Lines Pinout CD54AC257, CD54ACT257 (CERDIP) CD74AC257, CD74ACT257, CD74ACT258 (PDIP, SOIC) TOP VIEW ACT258 S 1I0 1I1 1Y 2I0 2I1 2Y GND AC/ACT257 S1 1I0 2 1I1 3 1Y 4 2I0 5 2I1 6 2Y 7 GND 8 AC/ACT257 16 VCC 15 OE ACT258 VCC OE 14 4I0 4I0 13 4I1 4I1 12 4Y 4Y 11 3I0 3I0 10...