SN74LS112AN

Flip Flops Overview

The SN74LS112AN is a dual J-K flip-flop from the Texas Instruments 74LS series, housed in a 16-pin PDIP package. It features negative edge triggering with complementary outputs and independent preset (/PRE) and clear (/CLR) inputs that override other states. The device operates within a supply voltage range of 4.75 V to 5.25 V, supporting a maximum clock frequency of 45 MHz. Propagation delay is specified at 20 ns under standard conditions (5 V, 15 pF load). Output drive capabilities include -400 µA for high-level and 8 mA for low-level currents. It functions reliably across an operating temperature range of 0°C to +70°C.

Flip Flops Feature Summary

• Dual negative edge-triggered J-K flip-flops with complementary outputs
• Independent active-low preset and clear inputs for direct state control
• TTL-compatible input and output logic levels

Flip Flops Applications

• Parallel data storage and shift register configurations
• Frequency division and counter circuits
• State machine implementation in digital systems

Flip Flops Procurement Notes

Verify the manufacturer part number SN74LS112AN against official Texas Instruments documentation to confirm the specific LS logic family and PDIP-16 through-hole package. Ensure compatibility with 5V TTL logic requirements and check for RoHS compliance status as indicated in current product specifications. Confirm availability of datasheets for accurate pinout and electrical parameter validation before integration.

Flip Flops Selection Notes

Select this component when designing circuits requiring dual J-K flip-flops with asynchronous preset and clear functions in a through-hole format. It is suitable for applications needing negative edge triggering and TTL compatibility. Consider alternative packages like SOIC or SOT if surface-mount technology is required, or different logic families such as HC or ALS for varying speed and power constraints.

Flip Flops Part Context

This component belongs to the Texas Instruments 74LS112A series, which provides dual J-K flip-flops. The 'N' suffix denotes the PDIP-16 plastic DIP package variant. It is part of the broader 74xx logic family, specifically designed for Low-power Schottky (LS) applications, offering a balance between speed and power consumption compared to standard TTL devices.

Flip Flops Replacement Considerations

SN74LS112AD (SOIC-16 package)

Flip Flops FAQ

How do the preset and clear inputs function?

The /PRE and /CLR inputs are active-low and asynchronous. Applying a low signal to either input immediately sets or resets the respective Q and /Q outputs, overriding the J, K, and clock inputs.

What is the trigger mechanism for this flip-flop?

The SN74LS112AN uses negative edge triggering. The state of the flip-flop changes based on the J and K inputs only at the falling edge of the clock pulse.