Board-level fit for a single-gate inverter with open drain
The TC7SZ05F,LJ(CT is a single-channel inverter from Toshiba's TC7SZ series, with an open-drain output stage — the output pulls low through an internal FET but floats high, so an external pull-up resistor sets the logic-high voltage independent of VCC. This makes it useful for level translation or wired-OR bus interfaces where multiple outputs share a common pull-up. The single input means it occupies one gate position on the board, useful when you need exactly one inverter rather than a quad package.
What the 32 mA sink and 4.3 ns delay mean on the bench
The output sinks 32 mA when low — that is the current the open-drain FET can pull through the load. For a 5V rail with a 1 kΩ pull-up to 5V, the sink current is 5 mA, well within the 32 mA ceiling. The high-side output current is listed as "-", meaning the open-drain FET does not source current; the pull-up resistor supplies the high-level current. Maximum propagation delay is 4.3 ns at 5V with a 50 pF load. This sets the data-rate ceiling: a 4.3 ns delay limits the toggle frequency to roughly 115 MHz in a single-gate path, but in practice the rise time set by the pull-up resistor and load capacitance will dominate. With a 1 kΩ pull-up and 50 pF load, the RC time constant is 50 ns — the pull-up resistor, not the gate, becomes the speed bottleneck. Quiescent current is 2 µA maximum — the gate draws negligible supply current when the output is not switching. This matters for battery-powered or always-on circuits where every microamp counts.
Package and board integration: SOT-753 (SMV)
Housed in an SC-74A / SOT-753 package, supplier device package SMV. The pinout is: pin 1 (NC), pin 2 (GND), pin 3 (IN), pin 4 (OUT), pin 5 (VCC). The open-drain output on pin 4 means the pull-up resistor connects externally between pin 4 and VCC. The CT option is suited for prototype or low-volume builds where you don't want to buy a full reel.
Operating temperature and compliance
This covers most indoor and outdoor equipment that is not under-hood automotive or downhole.