MC74VHCT126A Series

Quad Bus Buffer, 3-State, TTL Level

Catalog

Quad Bus Buffer, 3-State, TTL Level

Part	Number of Bits per Element	Package / Case [x]	Package / Case [y]	Package / Case	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Logic Type	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Number of Elements	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Supplier Device Package
ON Semiconductor MC74VHCT126ADR2G	1	0.154 in	3.9 mm	14-SOIC	4.5 V	5.5 V	Surface Mount	Buffer Non-Inverting	8 mA	8 mA	4	85 °C	-40 °C	3-State
ON Semiconductor MC74VHCT126AMELG	1	0.209 "	5.3 mm	14-SOIC	4.5 V	5.5 V	Surface Mount	Buffer Non-Inverting	8 mA	8 mA	4	85 °C	-40 °C	3-State	SOEIAJ-14

Catalog

Quad Bus Buffer, 3-State, TTL Level

Key Features

• High Speed: tPD= 3.8ns (Typ) at VCC= 5V

• Low Power Dissipation: ICC= 4mA (Max) at TA= 25°C

• TTL-Compatible Inputs: VIL= 0.8V; VIH= 2.0V

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Designed for 2V to 5.5V Operating Range

• Low Noise: VOLP= 0.8V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300mA

• ESD Performance: HBM > 2000V; Machine Model > 200V

• Chip Complexity: 72 FETs or 18 Equivalent Gates

• Pb-Free Packages are Available

Description

The MC74VHCT126A is a high speed CMOS quad bus buffer fabricated with silicon gate CMOS technology. It achieves noninverting high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation.The MC74VHCT126A requires the 3-state control input (OE) to be set Low to place the output into high impedance.The VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3V to 5.0V, because it has full 5V CMOS level output swings.The VHCT126A input structures provide protection when voltages between 0V and 5.5V are applied, regardless of the supply voltage. The output structures also provide protection when VCC= 0V. These input and output structures help prevent device destruction caused by supply voltage - input/output voltage mismatch, battery backup, hot insertion, etc.The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. The inputs tolerate voltages up to 7V, allowing the interface of 5V systems to 3V systems.