The TC74AC74MTCX is a Dual D-Type Positive Edge-Triggered Flip-Flop manufactured by Fairchild/ON Semiconductor. This device contains two independent D-type flip-flops with individual set (SD) and reset (RD) direct inputs, and common clock (CP) and data (D) inputs. Information at the D input is transferred to the Q output on the positive-going edge of the clock pulse. The set and reset inputs are active low and operate independently of the clock.

Applications

• Registers
• Counters
• Control Circuits
• Shift Registers
• Memory Storage

Features

• High Speed: tPD = 6.5 ns (typ) at VCC = 5V
• Low Power Dissipation: ICC = 4 μA (max) at TA = 25°C
• High Noise Immunity: VNIH = VNIL = 30% VCC
• Output Drive Capability: 15 LSTTL Loads
• Symmetrical Output Impedance: |IOH| = IOL = 24 mA (min)
• Balanced Propagation Delays: tPLH ≈ tPHL
• Operating Voltage Range: VCC = 2V to 6V

Benefits

• Improved System Performance: High speed operation allows for faster data processing and overall system performance.
• Reduced Power Consumption: Low power dissipation minimizes energy usage, extending battery life in portable devices.
• Enhanced Noise Immunity: High noise immunity ensures reliable operation even in noisy environments, preventing false triggering.
• Increased Output Drive Capability: Can drive multiple loads without signal degradation, simplifying interface design.
• Simplified System Design: Symmetrical output impedance reduces signal reflections and improves signal integrity.
• Flexible Operating Voltage: Operates over a wide voltage range, providing versatility in system design.
• Direct Set and Reset: Asynchronous set and reset inputs allow for immediate initialization or clearing of the flip-flop, independent of the clock.

Additional Details

The TC74AC74MTCX is characterized for operation from -40°C to +85°C. The device is available in a small outline integrated circuit (SOIC) package, making it suitable for surface mount applications. The asynchronous set and reset inputs override the clock and data inputs, providing a means to independently control the outputs. When both set and reset are low, the outputs are forced to a forbidden state. Simultaneous transitions of both the set and reset inputs are not allowed.

The device is designed to be pin-compatible with the industry-standard 74AC74, offering a convenient upgrade path for existing designs. It offers improved performance characteristics, such as higher speed and lower power consumption, compared to older logic families.