CY74FCT245TSOC

Series:	74FCT
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:	32mA, 64mA
Voltage - Supply:	4.75 V ~ 5.25 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOIC
Base Part Number:	74FCT245

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Introduction

CY74FCT245TSOC is an 8-bit non-inverting universal bus transceiver and register with 3-state outputs. It is a member of the high speed FCT family. The CY74FCT245TSOC is designed to operate at 3.3V providing minimum power consumption and improved data rate performance. The device is designed to meet or exceed all of the AC electrical and timing requirements of the current ANSI/IEEE Std. 1284-1994 parallel port specification.

Application field

The CY74FCT245TSOC provides bus expansion and data transfer in a wide range of applications including, but not limited to, microcontroller/peripheral interface, memory/memory cards, and time-dependent microcomputer systems. It is suitable for use in applications that require a high speed interface such as DMA and data transfer circuits.

Working Principle

The CY74FCT245TSOC is an 8-bit non-inverting universal bus transceiver and register, with 3-state outputs. A single control input is used to control the direction of data flow as data is either loaded from the data inputs to the register (outputs) or shifted from the register (outputs) to the data outputs. The 3-state outputs can be used to isolate the register from the bus.The device contains two 8-bit registers, a control register and an output register, each with an associated 8-bit bus. Data is transferred on the rising edge of the clock (CP) input. All eight data bits of the control register can be assigned to any of the eight data outputs. Each output can store the logic value entered into the respective control register bit.The block diagram below shows the operation of the CY74FCT245TSOC. When the write signal (WR) is low, data is loaded from the data inputs to the control register and latched on the rising edge of CP. Data is shifted from the control register to the output register on the rising edge of CP and is simultaneously read from the output register and placed on the data outputs. When the write signal is high, data is read from the data inputs, latched in the output register, and shifted in the opposite direction with the data outputs being loaded with the contents of the output register.

Conclusion

In conclusion, the CY74FCT245TSOC is an 8-bit non-inverting universal bus transceiver and register with 3-state outputs, designed to operate at 3.3V. It is used in a wide range of applications, including microcontroller/peripheral interface, memory/memory cards and time-dependent microcomputer systems. It is suitable for use in applications that require a high speed interface such as DMA and data transfer circuits. The device is designed to meet or exceed all of the AC electrical and timing requirements of the current ANSI/IEEE Std. 1284-1994 parallel port specification.

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