SN65220, SN65240, SN75240
SINGLE AND DUAL UNIVERSAL SERIAL BUS PORT
TRANSIENT SUPPRESSORS
SLLS266C – FEBRUARY 1997 – REVISED MARCH 2000
D
D
D
D
D
D
Design to Protect Submicron 3-V or 5-V
Silicon from Noise Transients
Applicable to Two High- or Low-Speed
Universal Serial Bus (USB) Host, Hub, or
Peripheral Ports
Port ESD Protection Capability Exceeds:
– 15-kV Human Body Model
– 2-kV Machine Model
Low Current Leakage . . . 1
µA
Max
Stand-Off Voltage . . . 6.0 V Min
Low Capacitance . . . 35 pF Typ
SN65220
(Marked
as
SADI)
DBV PACKAGE
(TOP VIEW)
NC
GND
NC
1
2
3
6
5
4
GND
C
GND
GND
D
B
A
SN65240, SN75240
(Marked
as
A65240 or A75240)
P OR PW PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
A
GND
B
GND
NC – No internal connection
schematic
A or C
description
The SN65220 is a single transient voltage
suppressor and the SN75240 and SN65240 are
dual transient voltage suppressors designed to
provide additional electrical noise transient
protection to two USB ports. Any cabled I/O can
be subjected to electrical noise transients from
various sources. These noise transients can
cause damage to the USB transceiver and/or the
USB ASIC if they are of sufficient magnitude and
duration. The USB ports are typically implement-
ed in 3-V or 5-V digital CMOS with very limited
ESD protection. The SN65220, SN75240, and
SN65240 can significantly increase the port ESD
protection level and reduce the risk of damage to
the large and expensive circuits of the USB port.
The SN75240 is characterized for operation from
0°C to 70°C. The SN65220 and SN65240 are
characterized for operation from –40°C to 85°C.
IEC1000-4-2 ESD performance is measured at
the system level and system design influences the
results of these tests. A high compliance level may
be attained with proper system design.
IEC1000-4-2 Compliance Test Levels
IEC1000-4-2
IEC1000 4 2
COMPLIANCE
LEVEL
1
2
3
4
MAXIMUM TEST VOLTAGE
CONTACT
DISCHARGE
(kV)
2
4
6
8
AIR
DISCHARGE
(kV)
2
4
8
15
–5
GND
B or D
(One Suppressor Shown)
NOTE A: All four GND terminals should be connected to ground.
CURRENT
vs
VOLTAGE
7.5
5
2.5
Current – A
0
–2.5
–7.5
–10
–30
–20
–10
0
10
20
30
40
Voltage – V
NOTE A: Typical current versus voltage curve was derived
using the IEC 1.2/50-µs surge waveform.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
©
2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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