USB50803C(-A) – USB50824C(-A)
Bidirectional Low Capacitance
This USB50803C(-A) – USB50824C(-A) family of Transient Voltage Suppressor (TVS) arrays
comes in an SO-8 package and can provide protection to 2 bidirectional data or interface lines. It is
designed for use in applications where very low capacitance protection is required at the board
level from voltage transients caused by electrostatic discharge (ESD) as defined in IEC 61000-4-2,
electrical fast transients (EFT) per IEC 61000-4-4 and secondary effects of lightning.
Using the schematic on the last page, pins 1 & 2 are tied together for the first protected line,
and pins 7 & 8 are tied together to ground. The same would occur for a second protected line
where pins 3 & 4 tied together and pins 5 & 6 tied together to the ground. These connections may
be switched in polarity since the electrical features are the same in each anti -parallel (opposite
facing) leg when the pins are tied together in this manner for bidirectional protection. Th e device
with an “-A” suffix is opposite in polarity for each pin-to-pin leg (see schematics). This provides no
functional difference for bidirectional TVS protection with the noted pins tied together as described
above. But the difference is significant if each leg is being used separately for unidirectional
These TVS arrays have a peak power rating of 500 watts for an 8/20 sec pulse. This array is
suitable for protection of sensitive circuitry such as TTL, CMOS DRAM’s, SRAM’s, HCMOS, HSIC
microprocessors, Universal Serial Bus (USB) and I/O transceivers.
USB50803 – USB50824
Important: For the latest information, visit our website http://www.microsemi.com.
• Provides electrically isolated protection for up to 2 bidirectional lines .
• Surge protection per IEC 61000-4-2 and IEC 61000-4-4.
• UL 94V-0 flammability classification.
• Ultra low capacitance; 3 pF per line pair.
• Ultra low leakage current.
• RoHS compliant versions available.
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
Tel: 1-800-446-1158 or
Fax: (978) 689-0803
APPLICATIONS / BENEFITS
• EIA-RS485 data rates: 5 Mbs
• 10/100/1000 Base T Ethernet.
• USB data rate: 900 Mbs
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
Junction and Storage Temp erature
Peak Pulse Power @ 8/20 s (see figure 1)
Impulse Repetition Rate
Capacitance (f = 1 MHz) @ 0 V
Solder Temperature @ 10 s
TJ and TSTG
-55 to +150
RF01092-1, Rev. C (11/24/20)
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