SN74LS126ADR

The SN74LS126ADR is TI’s quad buffer/line driver with 3-state outputs in the 74LS family. It contains four non‑inverting buffers; each buffer has an independent output‑enable input so its output can be placed in a high‑impedance state for bus sharing. It operates from a 5 V supply and uses TTL-compatible inputs (low‑power Schottky TTL).
Package suffix ADR indicates a specific TI package variant (check datasheet for exact package type (DIP/SOIC) and temperature range). Typical use cases include buffering data/address lines, driving buses, or interfacing microprocessors to memory or peripherals where multiple devices must share a line.
Key points:
- 4 buffers with 4 independent enables
- 3-state outputs
- 5 V supply, TTL-compatible inputs
- Suitable for bus buffering and line driving
Pinout (14‑pin package) roughly: four data inputs, four outputs, and four enable inputs (exact pin names depend on package variant; consult the datasheet for details).

Equivalent parts (same quad 3-state buffer function):
- TI SN74LS126N (or SN74LS126ADR)
- MC74LS126 (Motorola/ON Semiconductor)
- MM74LS126 (AMD)
- M74LS126 (Mitsubishi)
- μPD74LS126 / uPD74LS126 (NEC/Renesas)
- TC74LS126AP (Toshiba)
Note: all are cross-reference equivalents of the SN74LS126 family.

SN74LS126ADR features (concise):
- Quad buffer/line driver with 3-state (tri‑state) outputs
- 4 noninverting buffers
- Output enable controls provide high-impedance state when disabled
- TTL-compatible LS logic; operates from Vcc = 4.75–5.25 V
- 14-pin DIP package (SN74LS126ADR)
- Suitable as bus drivers or line drivers in TTL-compatible systems
Note: For exact propagation delays, drive specs, and fan-out, consult the TI datasheet.

- Pin count: 14 pins (14-pin package, e.g., DIP/SOIC).
- Function: Quad buffer/line driver with 3-state (tri-state) outputs. Four buffers with enable controls to tristate the outputs for bus sharing.

- Manufacturer: Texas Instruments Incorporated (TI).
- What kind of company: TI is an American multinational company that designs and manufactures semiconductors and integrated circuits, headquartered in Dallas, Texas.

SN74LS126ADR is a quad buffer/line driver with 3-state outputs. Typical applications:
- Buffering/driving digital signals on data or address buses in microprocessor/microcontroller systems
- Sharing a single bus among multiple devices by tri-stating outputs when not selected
- Interfacing TTL logic to peripheral memories and I/O chips
- Signal isolation and fan-out improvement
- Gating/multiplexing signals with enables for selective routing
- Level-compatible buffering to route signals with reduced loading on the originating driver

A 14-pin surface-mount Small Outline Integrated Circuit (SOIC) package.