Texas Instruments 74AHCT series, SN74AHCT158PW, Type Multiplexer, Circuit 4 x 2:1, Single Supply 4.5V ~ 5.5V, -40°C ~ 85°C, 16-TSSOP Surface Mount, Tube.
| Parameter | Value |
|---|---|
| Type | Multiplexer |
| Series | 74AHCT |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Voltage supply source | Single Supply |
| Current - output high, low | 8mA, 8mA |
| Operating temperature | -40°C ~ 85°C |
| Circuit | 4 x 2:1 |
| Package | Tube |
| Case | 16-TSSOP (0.173\", 4.40mm Width) |
| Independent circuits | 1 |
The SN74AHCT158PW is a single 4 x 2:1 multiplexer from the 74AHCT family. It selects one of two 4-bit input buses onto a single 4-bit output bus based on a common select line.
The 74AHCT family is a mature logic series with broad distribution — this part is not exotic.
It is a 4 x 2:1 multiplexer — it selects one of two 4-bit input buses and routes it to a single 4-bit output bus, controlled by a common select input. The single independent circuit handles all four channels together.
It operates from a single 4.5V to 5.5V supply. This is a 5V-only logic part; it does not run on 3.3V rails.
Both are 4 x 2:1 multiplexers in similar pinouts, but the 74AHCT family has tighter input thresholds optimized for TTL-compatible levels, while 74HC uses CMOS thresholds. In a 5V system with TTL drive, the AHCT version may switch more cleanly. Verify the input voltage thresholds against your driving logic before substituting.