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TVS Diode Arrays

SP720

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

+VBE diode threshold above V+ (Pin 16) or a -VBE diode threshold

below V- (Pin 8). From an IN input, a clamp to V+ is activated if a tran-

sient pulse causes the input to be increased to a voltage level greater

than one VBE above V+. A similar clamp to V- is activated if a negative

pulse, one VBE less than V-, is applied to an IN input. Standard ESD

Human Body Model (HBM) Capability is:

Features

• ESD Interface Capability for HBM Standards

- MIL STD 3015.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15kV

- IEC 61000-4-2, Direct Discharge,

Single Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4kV (Level 2)

Two Inputs in Parallel . . . . . . . . . . . . . . . . . . . . . . . . 8kV (Level 4)

- IEC 61000-4-2, Air Discharge . . . . . . . . . . . . . . . . . 15kV (Level 4)

• High Peak Current Capability

- IEC 61000-4-5 (8/20µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3A

- Single Pulse, 100µs Pulse Width. . . . . . . . . . . . . . . . . . . . . . . ±2A

- Single Pulse, 4µs 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 Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3pF (Typ)

• An Array of 14 SCR/Diode Pairs

Applications

• Microprocessor/Logic Input Protection

• Data Bus Protection

• Analog Device Input Protection

• Voltage Clamp

Functional Block Diagram

Refer to Figure 1 and Table 1 for further detail. Refer to Application Note

AN9304 and AN9612 for additional information.

Ordering Information

HBM STANDARD

MODE

R

C

ESD (V)

IEC 61000-4-2

Air

330Ω

150pF

>15kV

Direct

330Ω

150pF

>4kV

Direct, Dual Pins

330Ω

150pF

>8kV

MIL-STD-3015.7

Direct, In-circuit

1.5kΩ

100pF

>15kV

PART NO.

TEMP. RANGE

PACKAGE

PKG.

Min.

Order

NO.

SP720AP

-40 to 105

16 Ld PDIP

E16.3

1500

1970

2500

SP720AB

-40 to 105

16 Ld SOIC

M16.15

SP720ABT

-40 to 105

16 Ld SOIC

Tape and Reel

M16.15

Pinout

SP720 (PDIP, SOIC)

TOP VIEW

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

IN

IN

IN

IN

IN

IN

V-

IN

V+

IN

IN

IN

IN

IN

IN

IN

V+ 16

1

8

2

3 - 7

9 - 15

IN

IN

IN

V-

Electronic Protection Array for ESD and Overvoltage Protection