Overview
The 74HC126D is a high-speed CMOS quad bus buffer/line driver produced by Toshiba Semiconductor and Storage. This integrated circuit is fabricated using silicon gate C2MOS technology, which enables high-speed operation similar to LSTTL while maintaining the low power dissipation characteristic of CMOS devices. The 74HC126D features 3-state outputs controlled by the output enable inputs, allowing the outputs to be placed in a high-impedance state when the control input is set low. This component is designed to provide reliable and efficient signal buffering and driving in various digital circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.0 to 6.0 | V |
| Propagation Delay (tpd) | 10 ns (typ.) at VCC = 6.0 V | ns |
| Quiescent Supply Current (ICC) | 4.0 µA (max) at Ta = 25 °C | µA |
| Output Drive Capability | ± 7.8 mA | mA |
| Maximum Frequency (fmax) | 36 MHz | MHz |
| Operating Temperature Range | -40 to +125 °C | °C |
| Package Type | SOIC14 (SOT108-1) | |
| Logic Switching Levels | CMOS levels |
Key Features
- High speed operation with a propagation delay of 10 ns (typ.) at VCC = 6.0 V.
- Low power dissipation with a quiescent supply current of 4.0 µA (max) at Ta = 25 °C.
- Wide operating voltage range from 2.0 V to 6.0 V.
- 3-state outputs controlled by the output enable inputs (nOE), allowing the outputs to be placed in a high-impedance state when nOE is low.
- Inputs equipped with protection circuits against static discharge or transient excess voltage.
- High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
- Compliance with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
Applications
The 74HC126D is suitable for a variety of digital circuit applications where high-speed signal buffering and driving are required. These include:
- Computer systems and peripherals.
- Telecommunication equipment.
- Industrial control systems.
- Automotive electronics.
- Consumer electronics requiring reliable and efficient signal handling.
Q & A
- What is the primary function of the 74HC126D?
The primary function of the 74HC126D is to act as a quad bus buffer/line driver with 3-state outputs. - What is the operating voltage range of the 74HC126D?
The operating voltage range is from 2.0 V to 6.0 V. - How is the high-impedance state controlled in the 74HC126D?
The high-impedance state is controlled by the output enable inputs (nOE); a LOW on nOE causes the outputs to assume a high-impedance OFF-state. - What is the typical propagation delay of the 74HC126D at VCC = 6.0 V?
The typical propagation delay is 10 ns. - What are the logic switching levels for the 74HC126D?
The logic switching levels are CMOS levels. - What is the maximum frequency (fmax) of the 74HC126D?
The maximum frequency is 36 MHz. - What type of package is the 74HC126D available in?
The 74HC126D is available in an SOIC14 (SOT108-1) package. - Does the 74HC126D have protection against static discharge?
Yes, the inputs are equipped with protection circuits against static discharge or transient excess voltage. - What are the operating temperature ranges for the 74HC126D?
The operating temperature range is from -40 to +125 °C. - Is the 74HC126D compliant with any specific standards?
Yes, it complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
