SN74BCT25244NSRG4

Series:	74BCT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Logic Type:	Buffer, Non-Inverting
Number of Elements:	2
Number of Bits per Element:	4
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	80mA, 188mA
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	24-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	24-SO
Base Part Number:	74BCT25244

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Introduction

The SN74BCT25244NSRG4 is a four-channel noninverting buffer circuit designed and manufactured by Texas Instruments (TI). As part of the Texas Instruments buffering solutions, it is a versatile, low-power device designed to isolate data and control signals.

Application field

The SN74BCT25244NSRG4 is a general-purpose buffer offered in the noninverting configuration. It is typically used in digital logic circuits and communications equipment, and board level applications such as clocks and data buses. It can be used for signal isolation and noise reduction, where buffering multiple inputs and/or outputs is required.

Part Features

The SN74BCT25244NSRG4 features four noninverting buffer channels. It operates from a single 2.7 V to 5.5 V supply voltage, with a 4.5 V maximum peak-to-peak signal swing. It has low quiescent current draw at 2.8 mA (maximum). It also features Enable/Disable and tri-state outputs allowing current reduction to zero. It has high speed performance, with a maximum propagation delay of 8.2 ns (typical).

Working Principle

The SN74BCT25244NSRG4 operates as a noninverting buffer with a gain of 1, and serves as a signal transmission device. It has four outputs, each driven by a closely matched input signal. The circuit is designed to accept TTL and CMOS inputs and can support a wide range of input voltages on each buffer channel. When an input signal is applied to an input on the SN74BCT25244NSRG4, it is transferred without inversion to the corresponding output.

Circuit Description

The SN74BCT25244NSRG4 consists of four independent noninverting buffers constructed on a monolithic CMOS integrated circuit. It consists of four input buffers, four output buffers, and two output enable/disable circuits. Each output buffer features a pair of 2-input NAND gates and a 2-input NAND gate with a pull-up resistor to drive the noninverting output buffer. The input pins of each buffer feature Schmitt trigger action to provide switching hysteresis and reduce noise sensitivity. The Enable/Disable circuit consists of two 2-input NOR gates and an inverter. When the Enable is high and the Disable is low, all outputs are enabled. When the Disable is high, the outputs are disabled regardless of the Enable state. The tri-state buffers feature TTL compatibility, allowing the output to be 3-stated and the input logic voltage to become irrelevant. This provides additional power savings and the ability to use the circuit with multiplexers.

Conclusion

The SN74BCT25244NSRG4 from Texas Instruments is a four-channel noninverting buffer circuit with low quiescent current draw and high speed performance. It is designed for use in digital logic circuits, communications equipment, and board level applications for signal isolation and noise reduction. It has an Enable/Disable and tri-state output, allowing increased power savings and compatibility with other devices.

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