74F258A Datasheet | Philips Semiconductors

FEATURES - Multifunction capability - Non-inverting data path - 3-State outputs - See 74F257A for non-inverting version DESCRIPTION The 74F258A has four identical 2-input multiplexers with 3-State outputs which select 4 bits of data from two sources under control of a mon Select (S) input. The I0n inputs are selected when the Select input is Low and the I1n inputs are selected when the Select input is High. Data appears at the outputs in inverted form. The 74F258A is the logical implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic level supplied to the Select input. Outputs are forced to a High impedance ‘‘off” state when the Output Enable input (OE) is High. All but one device must be in the High impedance state to avoid currents that would exceed the maximum ratings if outputs are tied together. Design of the output signals must ensure that there is no overlap when outputs of 3-State devices are tied together. PIN CONFIGURATION S I0a I1a Ya I0b I1b Yb GND 1 2 3 4 5 6 7 8 16 VCC 15 OE 14 I0d 13 I1d 12 Yd 11 I0c 10 I1c 9 Yc SF00815 TYPE 74F258A TYPICAL PROPAGATION DELAY 3.5ns TYPICAL SUPPLY CURRENT (TOTAL) 14m A ORDERING INFORMATION ORDER CODE DESCRIPTION MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F258AN N74F258AD PKG. DWG. # SOT38-4 SOT109-1 16-pin plastic DIP 16-pin plastic SO INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS I0n, I1n S OE Ya - Yd Data inputs mon select input Output Enable input (active Low) Data outputs DESCRIPTION 74F(U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 150/40 LOAD VALUE HIGH/LOW 20µA/0.6m A 20µA/0.6m A 20µA/0.6m A 3.0m A/24m A NOTE: One (1.0) FAST Unit Load is defined as: 20µA in the High state and 0.6m A in the Low state. LOGIC SYMBOL 2 3 5 6 11 10 14 13 LOGIC SYMBOL (IEEE/IEC) 15 I0a I1a I0b I1b I0c I1c I0d I1d 1 EN G1 1 15 S OE 2 3 5 6 Ya Yb Yc Yd 10 11 13 1 1 7 9 VCC=Pin 16 GND=Pin...