To determine whether an ESD diode can be used as a substitute, the following points should be considered: 

Is VRWM close? 

2. Is the anti-static performance close to...? 

3. Is VBR close? 

4. Is IPP close? 

5. Are CJ and I close?

Application: 

LMULC1545CLV is mainly used for electrostatic protection of high-speed differential signal lines, such as HDMI 1.3, HDMI 1.4, HDMI 2.0, USB 2.0, USB 3.0, USB 3.1, Type C, SATA and eSATA, Thunderbolt, DisplayPort, V-by-On, etc. high-speed data interfaces. It is packaged as DFN2510-10. 

The package pins are as follows. 

The LMULC1545CLV package and internal circuitry are the same as those of the AZ176S-04F. Moreover, the parameters such as VRWM, VBR, IPP, CJ, ESD (air, contact) are almost identical. Therefore, it can completely replace the AZ176S-04F. 

PCB wire connection：

PCB布线：

One LMULC1545CLV chip can be used for 4 channels of high-speed differential ESD protection. The PCB wiring is used to connect each line to (pin 1 to 8, pin 2 to pin 7, pin 3 to pin 6, pin 4 to pin 5). For example, Pin 1 enters and exits Pin 8. The PCB layout connects pin 1 and pin 8 together. The same is true for the lines connected at pins 2, 3, and 4. Please note that there is no internal connection between pins 1 to 8. An external connection line must be used for the connection. The intermediate connection of GDN line should use a large ground instead of two independent grounds.。

Shanghai Leiditech offers multiple models that can be used in combination with Amazing to serve as a P2P alternative. The following table presents a partial list of ESD diodes that Lebao has compiled for substitution.。

序号	雷卯型号	晶焱型号	Package	印字	VRWM (V)	CIN (pF)
1	ESD3321C	AZ5C23-01B	CSP0402P2U	L	3.3	7
2	ESD0521C	AZ5C25-01B	CSP0402P2U	L	5	14
3	ESD0721C	AZ4A07-01B	CSP0603P2Y	J	7	50
4	ESD2421C	AZ4A21-01B	CSP0603P2Y	K	21	15
5	ESD3321C	AZ5A83-01B	CSP0603P2Y	5	3.3	52.5
6	ESD0521CH	AZ5A85-01B	CSP0603P2Y	3	5	31
7	ULC0521C	AZ5B75-01B	CSP0603P2Y	F	5	0.1
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