Quad 3.3V bus buffer with 3-state outputs
The Texas Instruments SN74LVTH125IPWREP is a quad non-inverting buffer from the 74LVTH series, each channel providing a single-bit buffer with independent 3-state output control. It operates from a 2.7 V to 3.6 V supply, making it a direct fit for 3.3 V logic buses in mixed-voltage systems. The device delivers 32 mA source and 64 mA sink output current, enough to drive heavily loaded backplane traces or multiple CMOS inputs without external line drivers. Rated for the industrial temperature range of -40°C to 85°C, it suits outdoor telecom cabinets, factory-floor PLC I/O modules, and motor-drive control boards where ambient heat is a factor.
Output drive and bus-matching
The 32 mA / 64 mA output drive is notably higher than many 3.3 V logic families (e.g., LVC typically sources 24 mA). That extra headroom means the SN74LVTH125IPWREP can hold a 50 pF bus trace at full logic levels without edge-rate degradation, which matters when the trace runs across a backplane or through a ribbon cable. The 3-state outputs let multiple buffers share a common data line — each channel's output-enable pin (active-low) puts the output into high-impedance when deasserted, so you can wire-OR several devices on a single bus without contention.
Package and footprint
Housed in a 14-lead TSSOP (4.40 mm body width), the device occupies about half the board area of a traditional SOIC-14. The 0.65 mm pin pitch demands careful soldering — a standard hot-air reflow profile for lead-free solder (peak 260°C, ramp rate ≤3°C/s) works well. MSL is not specified in the listing, but TI typically rates 74LVTH TSSOP packages at MSL 1; still, if the reel's moisture-barrier bag has been open more than 72 hours, a 24-hour bake at 125°C before reflow is cheap insurance.
Sourcing and lifecycle
It is ROHS3 compliant. The part is available through independent distribution and is quoted to order against an RFQ — current pricing and stock levels are confirmed at quote time. For a pin-compatible quad buffer, stick with this exact order code.