scope:

This document establishes the requirements and test procedures for the procurement of an electronic digital multiplexer module.

The following electrical parameters reflect the 0° to 60°C and −55° to 100°C end-of-life limits from table II.

Name Miltiplexer Family Digital Key code KDC Size 1A Weight 35 grams maximum Environment Class I or class II, as specified in MIL-STD-1389 Class I Class II Unit Failure rate 0.181 0.522 Failures/10⁶ hours maximum Power dissipation 825 max 825 max mW Supply voltage 5.0 ±10 5.0 ±10 Vdc Input voltage Low level −0.5 min, 0.8 max −0.5 min, 0.8 max V High level 2.0 min, V_CC max 2.0 min, V_CC max V

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Class I Class II Unit Input current Low level (V_IL = 0.0 V) −0.1 min, −1.73 max −0.1 min, −1.73 max mA (V_IL = 0.4 V) −0.1 min, −1.6 max −0.1 min, −1.6 max mA High level (V_IH = 2.4 V) 0 min, 40 max 0 min, 40 max µA (V_IH = 5.5 V) 0 min, 1.0 max 0 min, 1.0 max mA Output voltage Low level (I_OL = 16 mA) 0.0 min, 0.4 max 0.0 min, 0.4 max V High level (I_OH = −800 µA) 2.4 min, 4.5 max 2.4 min, 4.5 max V Output drive current Low level (V_OL = 0.4 V) 16 max 16 max mA High level (V_OH = 2.4 V) −800 max −800 max µA Propagation delay time t_PLH Select input to Y output C_L = 50 pF 6 min, 49 max 6 min, 58 max ns C_L = 150 pF 6 min, 59 max 6 min, 68 max ns Enable input to Y output C_L = 50 pF 3 min, 33 max 3 min, 37 max ns C_L = 150 pF 3 min, 43 max 3 min, 47 max ns Data input to Y output C_L = 50 pF 3 min, 35 max 3 min, 39 max ns C_L = 150 pF 3 min, 45 max 3 min, 49 max ns t_PHL Select input to Y output C_L = 50 pF 6 min, 41 max 6 min, 43 max ns C_L = 150 pF 6 min, 51 max 6 min, 53 max ns Enable input to Y output C_L = 50 pF 3 min, 39 max 3 min, 44 max ns C_L = 150 pF 3 min, 49 max 3 min, 54 max ns Data input to Y output C_L = 50 pF 3 min, 25 max 3 min, 27 max ns C_L = 150 pF 3 min, 35 max 3 min, 37 max ns

This module contains two quad and one dual two input multiplexers. Each multiplexer receives two input data lines (DU, D1), an enable input ([E bar]), and a select input (S). The data is transferred to the output (Y) when the input enable ([E bar]) is low. Input DO is selected when the select input (S) is low.

Each multiplexer has the input to output relationship of table I for positive logic. TABLE I. Input to output relationship for each multiplexer.

Enable Select Inputs Output input ------------------------------------------- E S D0 D1 Y H X X X L L H X L L L H X H H L L L X L L L H X H 1/ H = high-voltage level. 2/ L = low-voltage level. 3/ X = don't care.

Paralleling of outputs is not permissible.

The module has the following characteristics.

When connected in the worst case mode of operation (all but one gate switching simultaneously from a high level to a low level) the KDC module could exhibit substantial crosstalk. When the quiet output is a low level, there may be as much as a 1,000 mV positive going spike coincident with the negative edge of the switching output.

Circuits 5 through 10 can induce as much as 400 mV of noise onto any circuit 1 through 4 output. Circuits 1 through 4, 9, and 10 can induce as much as 400 mV of noise onto any circuit 5 through 8 output. Circuits 1 through 8 can induce as much as 400 mV of noise onto any circuit 9 and 10 output.