XL74LS279 – Quad S-R Latch – Xinluda
The Xinluda XL74LS279 is a quad set-reset (S-R) latch built on 74LS low-power Schottky TTL logic, housed in a 16-pin SOP-16 package. Available for RFQ through Pacific Component Xchange.
The XL74LS279 from Xinluda is a quad set-reset (S-R) latch belonging to the 74LS low-power Schottky TTL logic family. It integrates four independent S-R latches into a single 16-pin, 300-mil SOP-16 package, making it a compact building block for level-triggered storage, debounce circuits, and simple state-holding applications. A low pulse on an S input sets the corresponding Q output high; a low pulse on the R input resets that output low.
As a function-compatible equivalent to the industry-standard 74LS279, the XL74LS279 is widely used where a small, reliable latch array is needed alongside microcontrollers and other TTL/CMOS logic. Pacific Component Xchange stocks and sources this Xinluda part for engineers and buyers who need it on short notice.
Key Features
- Four independent set-reset (S-R) latches in one package
- 74LS low-power Schottky TTL logic family
- Operating supply voltage: 4.75 V to 5.25 V
- Operating temperature range: 0 °C to +70 °C
- Output low current (IOL): 8 mA
- Output high current (IOH): -0.4 mA
- Typical low-to-high propagation delay (tPLH): 22 ns
- 16-pin SOP-16 (300-mil) surface-mount package
Applications
- Level-triggered data latching and storage
- Switch debounce and signal conditioning
- Simple state-holding and flag registers
- Microcontroller and TTL/CMOS logic interfacing
- Legacy and industrial control board repair/replacement
Why Source XL74LS279 from Pacific Component Xchange
The XL74LS279 is a niche, hard-to-find logic IC with limited authorized-distributor availability. Pacific Component Xchange specializes in sourcing exactly these kinds of scarce and obsolete logic and power-management components. We offer authenticity verification, global shipping, and responsive quoting so you can keep production and repair lines moving. Request a quote (RFQ) today and our team will confirm availability, lead time, and pricing for your required quantity.
Additional Information
| Manufacturer | Xinluda (XINLUDA) |
|---|---|
| Component Type | Quad S-R Latch (Logic IC) |
| Logic Family | 74LS Low-Power Schottky TTL |
| Number of Channels (Latches) | 4 |
| Supply Voltage (Vcc) | 4.75 V to 5.25 V |
| Output Current (IOL) | 8 mA |
| Output Current (IOH) | -0.4 mA |
| Propagation Delay (tPLH, typ) | 22 ns |
| Operating Temperature | 0 °C to +70 °C |
| Package | SOP-16 (300-mil) |
| Part Status | Active |
| Availability | Available |
