Texas Instruments ESD321DPYR - Semicone IC Supplier

Mfr	Texas Instruments
Device Type	1-Channel Uni-directional TVS ESD Diode
Number of Channels	1
IO Capacitance (Typical)	0.9 pF
DC Breakdown Voltage (Min)	4.5 V
Working Voltage	3.6 V
Reverse Leakage Current (Typical)	0.1 nA @ 3.6 V bias
Reverse Leakage Current (Max)	50 nA
Clamping Voltage	6.8 V (Typ)
Dynamic Resistance	0.13 Ω
Contact Discharge	±30 kV
Air-Gap Discharge	±30 kV
Operating Temperature	-40°C to +125°C
Package	2-X1SON
Mounting Type	Surface Mount
Compliance	RoHS Compliant

The ESD321DPYR is a high-performance uni-directional ESD protection diode manufactured by Texas Instruments, featuring ±30kV contact and air-gap discharge protection that exceeds IEC 61000-4-2 Level 4 requirements in an ultra-compact industry-standard 0402 (DFN1006P2) package. This single-channel TVS diode delivers exceptional low-capacitance performance of just 0.9pF typical, combined with an extremely low clamping voltage of 6.8V at 16A TLP and dynamic resistance of only 0.13Ω, making it ideal for protecting high-speed data interfaces without compromising signal integrity. The device features a 3.6V reverse standoff voltage with 4.5V minimum DC breakdown voltage, and provides IEC 61000-4-4 EFT protection at 80A (5/50ns) alongside IEC 61000-4-5 surge protection rated at 6A (8/20μs).
Applications
The ESD321DPYR serves critical ESD protection functions across diverse electronic systems and interface types. In consumer electronics including wearables, smartphones, tablets, laptops, and desktop computers, it protects USB 2.0/1.1 ports, GPIO lines, and audio interfaces from damaging electrostatic discharge events during user interaction. Industrial and service robots utilize this device for protecting Ethernet 10/100/1000 Mbps communication interfaces and pushbutton controls in harsh electromagnetic environments. Set-top boxes, DVR/NVR systems, TVs, monitors, and EPOS (electronic point of sale) equipment employ this diode for safeguarding HDMI connectors, Ethernet ports, and other user-accessible interfaces. Additionally, any application requiring protection of high-speed data lines where signal integrity must be preserved alongside robust ESD protection benefits from the ultra-low capacitance and flat-clamping characteristics of this component.
FAQ
Q: What is the significance of the 6.8V clamping voltage at 16A TLP specification?
A:The 16A TLP current corresponds to an 8kV IEC contact discharge event, and the 6.8V clamping voltage represents the maximum voltage the protected IC experiences during this stress, which is substantially lower than conventional TVS diodes that typically clamp at 10-30V under similar conditions, dramatically improving downstream IC survival rates.
Alternative ESD Diode Models
● TPD1E1B04DPYR: This TI alternative offers even lower 0.5pF capacitance with 5.5V reverse standoff voltage and 15kV contact protection in the same compact DFN1006 package, optimized for protecting USB 2.0 and other high-speed interfaces requiring minimal capacitive loading.
● Nexperia PESD3V3L1BA: This bidirectional ESD protection diode provides 500W peak pulse power with 26V clamping voltage and 0.09μA leakage current in SOT-23 package, offering bidirectional protection capability for applications requiring protection against both positive and negative transients.
● Littelfuse SP1002: This TVS diode array provides low-capacitance ESD protection specifically designed for high-speed interfaces, offering robust protection in a compact package with characteristics suitable for USB and HDMI port protection applications.