M74HCT74B1R

Max Propagation Delay @ V, Max CL:	33ns @ 4.5V, 50pF
Base Part Number:	74HCT74
Package / Case:	14-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 125°C (TA)
Input Capacitance:	5pF
Current - Quiescent (Iq):	2µA
Voltage - Supply:	4.5 V ~ 5.5 V
Current - Output High, Low:	4mA, 4mA
Trigger Type:	Positive Edge
Series:	74HCT
Clock Frequency:	48MHz
Number of Bits per Element:	1
Number of Elements:	2
Output Type:	Differential
Type:	D-Type
Function:	Set(Preset) and Reset
Part Status:	Obsolete
Packaging:	Tube

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The M74HCT74B1R is part of the serial bi-directional universal shift register family of the M74HC_HCT74.. This type of integrated circuit is classified as a logic - flip flop. The purpose of the M74HCT74B1R is to take two or more clock signals and be used as a shift register, synchronization bus, AD/DA converter, or a memory bank switch. The unit is designed to work with a voltage between 2V and 6V and is compatible with both TTL (Transistor-Transistor-Logic) and CMOS (Complementary Metal-Oxide Semiconductor) logic devices. The M74HCT74B1R has two modes of operation; it can be used as a single master clock, with the external clock signal providing the timing; or it can be used with two clocks, where the external clock signal is used as the data input while the internal clock is used as the control signal. In the dual clock mode the M74HCT74B1R is the only device that provides complete synchronization between the two clocks, which is why it is often used in memory banks or AD/DA converters. In both modes of operation, the M74HCT74B1R has an input terminal that is connected to the external clock signal and an output terminal that is connected to the internal clock. The external clock signal is divided down by the internal clock and the output is timed accordingly. The basic working principle of the M74HCT74B1R is simple. When there is a difference between the two clock signals, the output of the M74HCT74B1R is adjusted to maintain synchronization. In the single clock mode, when the external clock signal is high, the output goes low and when the external clock signal is low, the output goes high. In the dual clock mode, when the external clock signal is high, the output goes low and when the external clock signal is low, the output goes high and in between the two clock edges the output either goes high or low depending on when the internal clock signal changes state. The M74HCT74B1R is useful in a variety of applications such as memory banks, synchronous buses, AD/DA converters, and shift registers. The M74HCT74B1R is also useful for noise reduction in synchronous logic designs, as it can be used to reduce the power consumption by synchronizing the two clock signals. In conclusion, the M74HCT74B1R is a versatile and reliable integrated circuit that can be used in many applications. It is able to maintain synchronization between two clock signals and is useful for noise reduction in synchronous logic designs. With its low power consumption and wide range of supported logic devices, the M74HCT74B1R is an ideal choice for a variety of applications.

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