LTC4255

15

4255f

APPLICATIO S I FOR ATIO

Figure 13. Relay Driver Output

4255 F13

DRIVE

CIRCUITRY

RELAY

18V

3V TO 12V

DGND

PACKAGE DESCRIPTIO

Relay Drivers

The four relay drivers have an open collector NPN

transistor with the ability to sink 50mA to within 0.3V of

DGND (Figure 13).

An 18V Zener diode connected to DGND is provided to

protect against the inductive kickback of the coil when the

NPN transistor is turned off.

G Package

28-Lead Plastic SSOP (5.3mm)

(Reference LTC DWG # 05-08-1640)

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

G28 SSOP 0802

0.09 – 0.25

(.0035 – .010)

0

° – 8°

0.55 – 0.95

(.022 – .037)

5.00 – 5.60**

(.197 – .221)

7.40 – 8.20

(.291 – .323)

12 3

4

5

6 7 8

9 10 11 12

14

13

9.90 – 10.50*

(.390 – .413)

25

26

22 21 20 19 18 17 16 15

23

24

27

28

2.0

(.079)

0.05

(.002)

0.65

(.0256)

BSC

0.22 – 0.38

(.009 – .015)

MILLIMETERS

(INCHES)

DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED .152mm (.006") PER SIDE

DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE

*

**

NOTE:

1. CONTROLLING DIMENSION: MILLIMETERS

2. DIMENSIONS ARE IN

3. DRAWING NOT TO SCALE

0.42

±0.03

0.65 BSC

5.3 – 5.7

7.8 – 8.2

RECOMMENDED SOLDER PAD LAYOUT

1.25

±0.12