74HCT112DB,118

Overview

The Nexperia 74HCT112DB,118 is a dual negative-edge triggered JK flip-flop with asynchronous set and reset inputs. It operates within a supply voltage range of 2V to 6V for the HC series, while the HCT variant specifies 4.5V to 5.5V. The device features complementary Q and nQ outputs and includes Schmitt-trigger action on the clock input for noise tolerance. Packaged in a 16-SSOP surface-mount format, it supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Dual negative-edge triggered JK flip-flops with individual J and K inputs
• Asynchronous active LOW set and reset inputs independent of clock
• Schmitt-trigger clock input for improved noise immunity
• Complementary Q and nQ outputs

Applications

• Digital data storage and shift register construction
• Frequency division and counting circuits
• State machine implementation in control logic
• Timing pulse generation and synchronization

Procurement Notes

Verify the specific suffix against official Nexperia documentation to confirm package type and tape/reel specifications. Confirm that the HCT logic level compatibility matches the target system voltage requirements. Check current production status as part numbers may undergo lifecycle changes or obsolescence notifications without immediate public announcement.

Selection Notes

Select this component when dual JK functionality with asynchronous control is required in a compact surface-mount package. Ensure the system voltage aligns with the HCT specification range. Consider the Schmitt-trigger clock input if the application involves slow-rise-time signals or noisy environments requiring enhanced signal integrity.

Part Context

This part belongs to the Nexperia 74HCT family, which provides TTL-compatible logic levels in CMOS technology. The 74HCT112 specifically offers two independent JK flip-flops in a single package, facilitating complex sequential logic designs. It is designed for general-purpose digital applications requiring reliable state retention and controlled transitions.

Replacement Considerations

CD74HC112M96 (Texas Instruments)

FAQ

Are the set and reset inputs synchronous or asynchronous?

The set and reset inputs are asynchronous and active LOW, meaning they operate independently of the clock signal.

What is the function of the Schmitt trigger on the clock input?

The Schmitt trigger action makes the circuit highly tolerant to slower clock rise and fall times, improving noise immunity.