8264

The 8264 is a kind of 3-inpu, 4-bit multiplexer, which is a gating array whose function is analogous to that of a 4-pole, 3-position switch. Four bits of digtal data are selected from one of three inputs. A 2-bit channel-selection code determines which input is to be active.The data complement input controls the conditional complement circuit at the multiplexer output to effect either inverting or non-inverting data flow.

The 8264 used bare connector outputs for expansion of input terms. 8264 may be expanded by connecting its outputs to the outputs of another 8264. Provision is made for use of a 3-bit code to determine which multiplexer is selected; thus, eight multiplexers may be commoned to effect a 4-pole, 24-position switch.

Then is about the DC electrical characteristics of 8264: (1)IOH, output high current: 200A max at VCC=4.75V, VOUT=2.0 V; (2)VOL, output low voltage: 0.4 V max at VCC=4.75 V, IOL=16 mA; (3)IIL, input low current: -1.6 mA max when VCC=5.25 V, VIN=4.5 V at pins An, Bn, Cn, OE, DC; -3.2 mA when VCC=5.25 V, VIN=4.5 V at pins S0, S1; (4)IIH, input high current: 40 A max when VCC=5.25 V, VIN=4.5 V at pins An, Bn, Cn, OE, DC; 80 A when VCC=5.25 V, VIN=4.5 V at pins S0, S1; (5)ICC, supply current: 90.4 mA at VCC=5.25 V.