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54LS109

Dual Positive Edge-Triggered J-K Flip-Flop with Preset, Clear, and Complementary Outputs

Partnumber Manufacturer Quantity Availability
54LS109 28 In Stock

Description and Introduction

Dual Positive Edge-Triggered J-K Flip-Flop with Preset, Clear, and Complementary Outputs The 54LS109 is a dual J-K positive-edge-triggered flip-flop integrated circuit manufactured by Texas Instruments. It is part of the 54LS series, which is designed for military and aerospace applications, offering a wider temperature range and higher reliability compared to the commercial 74LS series. Key specifications include:

- **Supply Voltage (VCC):** 4.5V to 5.5V
- **Operating Temperature Range:** -55°C to +125°C
- **Input High Voltage (VIH):** 2V (min)
- **Input Low Voltage (VIL):** 0.8V (max)
- **Output High Voltage (VOH):** 2.7V (min) at IOH = -400µA
- **Output Low Voltage (VOL):** 0.5V (max) at IOL = 8mA
- **Propagation Delay (tPLH, tPHL):** Typically 20ns
- **Power Dissipation:** Typically 20mW per flip-flop
- **Package:** Available in ceramic dual-in-line (DIP) packages

The 54LS109 features separate J and K inputs, clock (CLK) inputs, and direct set (SET) and reset (CLR) inputs, making it suitable for various sequential logic applications.

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