IDT74FCT3807AQI

Series:	74FCT
Packaging:	Tube
Part Status:	Obsolete
Type:	Fanout Buffer (Distribution)
Number of Circuits:	1
Ratio - Input:Output:	1:10
Differential - Input:Output:	No/No
Input:	LVTTL
Output:	CMOS, TTL
Frequency - Max:	100MHz
Voltage - Supply:	3 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	20-SSOP (0.154", 3.90mm Width)
Supplier Device Package:	20-QSOP
Base Part Number:	IDT74FCT3807

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Introduction

The IDT74FCT3807AQI is a high-speed, low-jitter clock fanout buffer which is developed by IDT. It is one of the device family which provides application-specific clock solutions. This device has a unique architecture which allows high performance output with extremely low jitter operation.

Application Field

The IDT74FCT3807AQI can be used in the field of clock and timing for the purpose of clock buffering, driving and synchronizing. It can be used to clock distribution system without external components in the 72,74 and 111-pin packages for all types of clock signals. It is designed especially for high-speed clock (data) network applications including communications, peripheral, memory and logic interfaces.

Working Principle

The IDT74FCT3807AQI utilizes a unique design technique to resist the effect of on-die and crossbar switch capacitance. This technique works to reduce the clock jitter associated with high speed clocks external to the IC. Each of the four individual 1:4 buffered outputs is capable of driving up to seven series terminated devices, depending on the impedance of the devices being driven. The device features an active pull-up output driver on each of the four output buffers. The active pull-up driver provides improved output to drive capacitive loads with data rates up to 400 Mbps.The IDT74FCT3807AQI utilizes a variable-input-level sense-and-control technique to adapt to different input clock levels. This technique is used to improve the accuracy of skew values across all the outputs of the device.Furthermore, the device has an open drain output configuration on its extra input buffer, which allows for asynchronous source synchronization. This feature enables the clock to be phase-shifted in increments of 2 nanoseconds.

Conclusion

The IDT74FCT3807AQI is a high performance, low-jitter clock fanout buffer developed by IDT. It is tailored specifically for high speed clock (data) networks applications, including communications, peripheral, memory and logic interfaces. This device has a unique architecture which allows high performance output with extremely low jitter operation. It features an active pull-up output driver and an open drain output that enables asynchronous source synchronization. This clock buffer is highly suitable for clock distribution, buffering, driving, and synchronization purposes.

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