Philips 74HCT258
The 74HC/HCT258 are high-speed Si-gate CMOS devices and are pin compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. The 74HC/HCT258 have four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (S).| Part No. | 74HCT258 |
|---|---|
| Datasheet | 74HCT258 Download |
| Manufacturer |  Philips |
| Description | Quad 2-input multiplexer |
| Buy | Stock & Price |
FEATURES
● Inverting data path● 3-state outputs interface directly with system bus
● Output capability: bus driver
● ICC category: MSI.
GENERAL DESCRIPTION
7A. The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and the data inputs from source 1 (1I1 to 4I1) are selected when S is HIGH. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns. 1Y = OE × ( 1I 1 × S + 1I 0 × S ) 2Y = OE × ( 2I 1 × S + 2I 0 × S ) 3Y = OE × ( 3I 1 × S + 3I 0 × S ) 4Y = OE × ( 4I 1 × S + 4I 0 × S ) 74HC/HCT258 Data appears at the outputs (1Y to 4Y) in inverted form from the select inputs. The ‘258’ is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S. The outputs are forced to a high impedance OFF-state when OE is HIGH. The logic equations for the outputs are: The ‘258’ is identical to the ‘257’ but has inverting outputs. TYPICAL SYMBOL tPHL/tPLH PARAMETER propagation delay nI0, nI1 to nY S to nY CI CPD Notes 1.
