74LVCH16T245ZQLR

74LVCH16T245ZQLR is a Texas Instruments 16‑bit bidirectional bus transceiver with 3‑state outputs. It lets you connect two separate buses (A and B) and transfer data in either direction under control of a common DIR pin, with an output-enable (OE) to tri-state the outputs. This makes it useful for bus sharing, level shifting between voltage domains, and isolating peripherals on a data bus.
Key points:
- 16 data lines (two 8/16-bit sides) with a single DIR input and an OE input.
- When OE is low, the selected direction drives the bus; when OE is high, both sides are high‑impedance.
- LVCH family = low-voltage CMOS with fast speeds and often inputs tolerant to different logic levels; supports level shifting between domains with different Vcc supplies (depending on exact variant).
- CH in the family name typically indicates bus-hold on inputs for noise immunity.
ZQLR is the packaging/ordering suffix (e.g., tape-and-reel, RoHS-compliant lead-free variant). For exact electrical specs, timing, and recommended operating voltages, consult the SN74LVCH16T245 datasheet.

Key features of 74LVCH16T245ZQLR:
- 16‑bit bidirectional bus transceiver with 3‑state outputs
- Two 8‑bit sections (A and B) with independent direction and enable controls
- Noninverting data path; data can flow in either direction (A↔B) per DIR control
- 3-state outputs allow high‑impedance bus sharing
- Low‑voltage CMOS (LV) technology: Vcc = 1.65 V to 3.6 V
- Bus-hold on data inputs to stabilize lines when not driven
- TTL/CMOS input compatibility; robust ESD protection
- Low static power; high‑speed operation
- RoHS-compliant Pb‑free package (ZQLR) in a 20‑pin package
(Concise, product‑level summary suitable for quick reference.)

Package: 20‑pin VSSOP (leadless) package, RoHS compliant, Tape & Reel (suffix ZQLR indicates this packaging).

- Pin count: 40 pins (in standard packages such as TSSOP/SOIC-40; packaging can vary).
- Function: 16-bit bidirectional bus transceiver with 3-state outputs. Data can pass between A[15:0] and B[15:0] under control of DIR (direction) and OE (output enable). VCC and GND are included.

- Manufacturer: Texas Instruments (TI)
- What kind of company: TI is an American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing integrated circuits.

Typical application areas for the 74LVCH16T245ZQLR:
- 16-bit bidirectional bus transceiver with 3-state outputs for buffering/isolation between devices (CPU/memory/peripherals)
- Level shifting between 3.3V and 5V domains
- Bus isolation in backplanes, expansion cards, and shared buses
- Data-path multiplexing/demultiplexing and I/O expansion for MCUs/SoCs
- Signal integrity improvement in mixed-voltage, high-speed bus interconnects

Equivalent parts are other vendors’ 16‑bit bidirectional bus transceivers with 3‑state outputs. Direct cross‑refs (16‑bit) are typically labeled 16245 in the LVC/LVCH family, e.g., NXP/Nexperia 74LVC16245 (and similar LVCH/ALVC variants by Toshiba/Trenas), or two 8‑bit parts (e.g., TI SN74LVC245 or NXP 74LVC245) in parallel to satisfy 16 bits. Check voltage range and packaging to ensure drop‑in compatibility.