The TC74HC126AF is a high-speed CMOS quad bus buffer gate with 3-state outputs, manufactured using silicon gate C2MOS technology. This device is designed for high-speed data transmission and bus interface applications. Each of the four buffers has an independent Output Enable (OE) input. When OE is low, the buffer is enabled and transmits the input signal to the output. When OE is high, the output is disabled and presents a high-impedance state, allowing multiple devices to share the same bus without contention.

Applications

• Bus transceivers
• Memory interface
• Data multiplexing
• Address decoding
• Logic level shifting

Features

• High-speed operation: tpd = 7 ns (typ.) at VCC = 5V
• Low power dissipation: ICC = 1 μA (max) at Ta = 25°C
• Three-state outputs for bus interfacing
• Independent output enable inputs
• High noise immunity: VNIH = VNIL = 28% VCC (min)
• Output drive capability: 10 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 4 mA (min)
• Balanced propagation delays: tPLH ≈ tPHL
• Wide operating voltage range: VCC = 2V to 6V

Benefits

• Enables high-speed data transmission on bus systems.
• Reduces power consumption, extending battery life in portable applications.
• Facilitates sharing a common bus between multiple devices without conflicts.
• Provides flexible control over data flow with independent output enables.
• Enhances system reliability by preventing false triggering due to noise.
• Allows driving a large number of loads without signal degradation.
• Maintains signal integrity across the outputs.
• Minimizes timing skew, improving system performance.
• Offers versatile power supply options.

Additional Details

The TC74HC126AF is supplied in a SOP14 (Small Outline Package) package. The operating temperature range is -40°C to 85°C. It is designed to be pin-compatible with standard TTL logic devices. The input pins are equipped with protection circuits against static discharge to ensure device reliability during handling and assembly. The 3-state output configuration is crucial for enabling multiple devices to be connected to a shared bus, allowing for efficient data transfer in complex digital systems.