Inhaltsverzeichnis
74_257 - Multiplexer
Quad 2-Input Multiplexer (3-State)
The 74F257A is a quad 2-input multiplexer with 3-STATE outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (non-inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.
Pinbelegung / Pinout
im Amiga
| Typ | Commo-Nr. | C= Bezeichnung | C= Info | Form | Editors Info | |
|---|---|---|---|---|---|---|
| A | 315033-01 | XXX IC 74LS257 * | =901521-57 | |||
| B | 380227-58 | IC 74 HCT 257 | A-SIDECAR | |||
| C | 390091-01 | IC 74 F 257 | AMIGA-2000 | |||
| D | 391495-01 | IC 74 F 257 SMD | A-4000 | So-16 | ||
| E | 901521-57 | IC 74 LS 257 N | (7708)* | |||
| F | 901525-28 | IC 74 S 257 |
| Alternativ-Typ : | xx (lt. Commodore ? ) |
|---|
| Vorkommen | Anzahl | Typ | Position | Bemerkung |
|---|---|---|---|---|
| Axx | 1 | ? | U, | - |
| A3640 | 1 | D | U212, | - |
Downloads / Links
- Quelle
- Datenblatt
- 74F257 von Fairchild (36kB)
- 74F257 von Texas Instruments (78kB)
- interne Links: Einkaufshinweise und Logic-Gatter