MC74HC245ADTG

Series:	74HC
Packaging:	Tube
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:	7.8mA, 7.8mA
Voltage - Supply:	2 V ~ 6 V
Operating Temperature:	-55°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	74HC245

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Logic - Buffers, Drivers, Receivers, Transceivers The MC74HC245ADTG is an 8-channel bus transceiver which can be used to buffer or drive a system’s sets of logical signals and is typically used in applications such as system interconnects and memory buses.It operates in two modes: Normal Mode, in which the driver and receiver are enabled, and High Impedance Mode, in which the receiver is disabled and the driver is placed in a high impedance state. The rise and fall times are controlled to minimize propagation delays. This is done by setting the input voltage threshold such that the best performance is achieved with minimal loading on the bus.In applications such as memory buses, the MC74HC245ADTG provides better data integrity compared to other similar transceivers. This is because the receiver is designed to latch data only when the output of the driver stabilizes, preventing noise from affecting the receiver–Figure 1.Figure 1: High Noise Immunity CircuitThe MC74HC245ADTG is a 3-state device, meaning it has three logic states: HIGH, LOW, and HIZ (high-impedance). In HIGH state, the device passes an output logic 1 signal to the output. In LOW state, the device passes an output logic 0 signal. In HIZ (high impedance) state, the output acts as an open circuit and does not affect the signal on the bus. It is important to note that signal transmission propagation is slow in the HIZ state, so the device must be used with caution in high-speed systems.The MC74HC245ADTG is manufactured using integrated circuit technology. It has a wide operating temperature range of -40°C to +85°C. It has an ESD protection of 8-kV HBM (human body model). The bus transceiver is available in a 20-pin dual-in-line package with a 0.30-inch pitch. The device is RoHS-compliant and is UL Recognized and CECC Certified.The MC74HC245ADTG is ideal for use in systems where fast switching, low power consumption, and noise immunity are critical. It is well-suited for memory interconnects, microcontroller-based systems, and automotive applications. The device has a Pin-to-Pin Bus SWAP feature which allows the user to swap the bus pins, meaning the output and input pins can be swapped with one another, making it ideal for systems requiring a “cross-over” connection.The MC74HC245ADTG is a very versatile transceiver that can be used in a wide range of applications. It is a perfect solution for applications where fast logic levels need to be driven and have a longer bus length and where data integrity is critical.

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