SP720
Data Sheet
January 1998
File Number
2791.10
Electronic Protection Array for ESD and
Over-Voltage Protection
[ /Title
(SP720
)
/Sub-
ject
(Elec-
tronic
Protec-
tion
Array
for
ESD
and
Over-
Volt-
age
Protec-
tion)
/Autho
r ()
/Key-
words
(TVS,
Tran-
sient
Sup-
pres-
sion,
Protec-
tion,
ESD,
IEC,
EMC,
Elec-
tro-
magnet
ic
Com-
The SP720 is an array of SCR/Diode bipolar structures for
ESD and over-voltage protection to sensitive input circuits.
The SP720 has 2 protection SCR/Diode device structures
per input. A total of 14 available inputs can be used to
protect up to 14 external signal or bus lines. Over-voltage
protection is from the IN (pins 1-7 and 9-15) to V+ or V-. The
SCR structures are designed for fast triggering at a
threshold of one +V
BE
diode threshold above V+ (Pin 16) or
a -V
BE
diode threshold below V- (Pin 8). From an IN input, a
clamp to V+ is activated if a transient pulse causes the input
to be increased to a voltage level greater than one V
BE
above V+. A similar clamp to V- is activated if a negative
pulse, one V
BE
less than V-, is applied to an IN input.
Standard ESD Human Body Model (HBM) Capability is:
HBM STANDARD
IEC 1000-4-2
Air
Direct
Direct, Dual Pins
MIL-STD-3015.7
Direct, In-circuit
MODE
R
330
Ω
330
Ω
330
Ω
1.5k
Ω
C
150pF
150pF
150pF
100pF
ESD (V)
>15kV
>4kV
>8kV
>15kV
Features
• ESD Interface Capability for HBM Standards
- MIL STD 3015.7 . . . . . . . . . . . . . . . . . . . . . . . . . . .15kV
- IEC 1000-4-2, Direct Discharge,
Single Input. . . . . . . . . . . . . . . . . . . . . . . . 4kV (Level 2)
Two Inputs in Parallel . . . . . . . . . . . . . . . . 8kV (Level 4)
- IEC 1000-4-2, Air Discharge. . . . . . . . . . 15kV (Level 4)
• High Peak Current Capability
- IEC 1000-4-5 (8/20
µ
s) . . . . . . . . . . . . . . . . . . . . . .
±
3A
- Single Pulse, 100
µ
s Pulse Width . . . . . . . . . . . . . .
±
2A
- Single Pulse, 4
µ
s Pulse Width . . . . . . . . . . . . . . . .
±
5A
• Designed to Provide Over-Voltage Protection
- Single-Ended Voltage Range to . . . . . . . . . . . . . . .+30V
- Differential Voltage Range to . . . . . . . . . . . . . . . .
±
15V
• Fast Switching . . . . . . . . . . . . . . . . . . . . . . . 2ns Risetime
• Low Input Leakages . . . . . . . . . . . . . . . 1nA at 25
o
C (Typ)
• Low Input Capacitance. . . . . . . . . . . . . . . . . . . . 3pF (Typ)
• An Array of 14 SCR/Diode Pairs
• Operating Temperature Range . . . . . . . . . -40
o
C to 105
o
C
Refer to Figure 1 and Table 1 for further detail. Refer to
Application Note AN9304 and AN9612 for additional
information.
Applications
• Microprocessor/Logic Input Protection
• Data Bus Protection
• Analog Device Input Protection
Ordering Information
PART NO.
SP720AP
SP720AB
SP720ABT
TEMP. RANGE
(
o
C)
-40 to 105
-40 to 105
-40 to 105
PACKAGE
16 Ld PDIP
16 Ld SOIC
16 Ld SOIC
Tape and Reel
PKG.
NO.
E16.3
M16.15
M16.15
• Voltage Clamp
Functional Block Diagram
V+ 16
Pinout
SP720 (PDIP, SOIC)
TOP VIEW
IN
IN
IN
IN
IN
IN
IN
V-
1
2
3
4
5
6
7
8
16 V+
15 IN
14 IN
13 IN
12 IN
11 IN
10 IN
9 IN
V-
8
IN
IN
1
2
3-7
9 - 15
IN
6-3
NOTE: The design of the SP720 SCR/Diode ESD Protection Arrays is covered by Littelfuse patent
4567500.
1-800-999-9445 or 1-847-824-1188
|
Copyright
©
Littelfuse, Inc. 1998
HARRIS [ HARRIS CORPORATION ]
