74LVTH2245MTCX

Series:	74LVTH
Packaging:	Tape & Reel (TR)
Part Status:	Active
Logic Type:	Transceiver, Non-Inverting
Number of Elements:	1
Number of Bits per Element:	8
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	32mA, 64mA; 12mA, 12mA
Voltage - Supply:	2.7 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	74LVTH2245

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Introduction

74LVTH2245MTCX is an 8-bit differential bus transceiver with direction control used in digital systems that transfer data in a single direction. The device is part of the 74LVTH family of logic circuits, and is categorised under Logic - Buffers, Drivers, Receivers, Transceivers. It is most suitable for applications such as address and data buses in high-speed systems, clock tree buffering and general purpose buffering.

Overview

The 74LVTH2245MTCX transceiver is designed to handle true and complementary bidirectional data on a per-word basis. It buffers the data received on the A bus, and transmits them on the B bus when the direction pin (dir) is enabled. When direction pin (dir) is high, data can flow from port B to port A. When direction pin (dir) is low, data flows from port A to port B. The bidirectional data path is organized as 8-bits of latched data, with an optional 8-bit mask register. Each bit of the mask register can be used to program a byte-wide masking function, allowing single byte or multi byte data transfers to occur.The 74LVTH2245MTCX device combines high speed performance with low power dissipation and wide supply voltage range (1.65 V to 3.6 V). The device operates on both Live Insertion and Live Extraction techniques, which offers flexibility and reduces system fragmentation costs.

Working Principle

The 74LVTH2245MTCX device operates as a multiplexer, taking the data from each of its A and B ports, depending on the logic level at the direction pin (dir). If the logic level at direction pin (dir) is high, data from port B is transmitted to port A. If the logic level at direction pin (dir) is low, data from port A is transmitted to port B. The device also includes an optional 8-bit mask register, which can be programmed to enable single byte or multi-byte data transfers.To enable data flow from port B to port A, the direction pin (dir) must be set low. This enables the transceiver’s A bus to transmit data to the B bus. After the data has been received on the B bus, it is persisted and the A bus is ready to accept the next data transmission.To enable data flow from port A to port B, the direction pin (dir) must be set high. This allows the transceiver’s B bus to transmit data to the A bus. The data is then persisted on the A bus and the B bus is ready to accept the next data transmission.The transceiver\'s mask register can be programmed to enable single byte or multi-byte data transfers. The mask register is used to select bytes along the bidirectional path that are to be transformed or bypassed. This eliminates the need for external byte-wide masking, simplifying the design of the downstream circuitry.

Application Field

The 74LVTH2245MTCX device is well suited for a range of applications where data must be transferred in both directions. This includes address and data buses in high-speed systems, clock tree buffering and buffering in general-purpose applications.In systems requiring the transfer of multiple bytes between multiple memory banks, the 74LVTH2245MTCX device can be used in conjunction with byte masking logic to selectively choose one byte from a larger data stream. This enables the device to quickly transfer data from one memory bank to another without the need for external logic. The 74LVTH2245MTCX device also has a built-in low-power sleep mode, making it ideal for applications where power consumption must be kept to a minimum, such as mobile and embedded systems.

Conclusion

The 74LVTH2245MTCX device is a robust, multi-functional 8-bit differential bus transceiver with direction control. It is an ideal solution for address and data

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