PI49FCT3803LEX vs SI53321-B-GQ

Part Number	PI49FCT3803LEX	SI53321-B-GQ
Category	Clock/Timing - Clock Buffers, Drivers	Clock/Timing - Clock Buffers, Drivers
Manufacturer	Diodes Incorporated	Skyworks Solutions Inc.
Description	IC CLK BUFFER 1:7 156MHZ 16TSSOP	IC BUFFER 1:10 LVPECL 32ELQFP
Package	Tape & Reel (TR)	Tube
Series	49FCT	-
Type	Fanout Buffer (Distribution)	Fanout Buffer (Distribution), Multiplexer
Voltage - Supply	3V ~ 3.6V	2.375V ~ 3.63V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	16-TSSOP (0.173\", 4.40mm Width)	32-LQFP Exposed Pad
Supplier Device Package	16-TSSOP	32-LQFP (7x7)
Output	CMOS, TTL	LVPECL
Frequency - Max	156 MHz	1.25 GHz
Number of Circuits	1	1
Input	CMOS, TTL	CML, HCSL, LVCMOS, LVDS, LVPECL
Ratio - Input:Output	1:7	2:10
Differential - Input:Output	No/No	Yes/Yes

1. What is the difference between a clock buffer and a clock driver?

The main function of a clock buffer is to distribute clock signals, while a clock driver is used to enhance signal strength to drive higher loads. Buffer is usually used for branching and synchronizing multiple clock signals, while driver is used to increase signal transmission distance and load capacity.
2. How can clock buffers reduce jitter?

High quality clock buffers are typically designed with low jitter characteristics to ensure phase consistency of output signals and reduce phase noise during transmission. This is crucial for high-precision clock allocation, such as in communication and data transmission applications.
3. Does the clock driver support differential signals?

Yes, many clock drivers support differential signaling, such as LVDS, CML, and HCSL, which can provide higher anti-interference capabilities, especially in high-speed signal transmission applications.
4. How to evaluate the performance of clock drivers?

When evaluating clock drivers, several key parameters need to be considered:

Driving capability (load capacity)

Output signal integrity

Phase noise and jitter

Power noise suppression

Power supply voltage range and power consumption