MAX6955

2-Wire Interfaced, 2.7V to 5.5V

LED Display Driver with I/O

Expander and Key Scan

Maxim Integrated | 33

www.maximintegrated.com

*

7-segment digits can be replaced by directly controlled discrete LEDs according to settings in decode mode register (Table 11).

**

The highlighted row is used in Typical Operating Circuit 1 for display digits 2 and 3.

CONFIGURATION

CHOICE

Common-Cathode

Drive: Digit Type

00

a1

a1

1a

a1

a1

1a

a

a

a1

1a

a

01

a2

a2

—

a2

a2

—

—

—

a2

—

—

02

CC2

—

CC2

CC2

CC2

CC2

—

CC2

—

—

CC2

03

—

CC3

CC3

CC3

—

—

CC3

—

CC3

CC3

CC3

04

b

b

1b

b

b

1b

b

b

b

1b

b

05

c

c

1c

c

c

1c

c

c

c

1c

c

06

d1

d1

1d

d1

d1

1d

d

d

d1

1d

d

07

d2

d2

1dp

d2

d2

1dp

—

—

d2

1dp

—

08

e

e

1e

e

e

1e

e

e

e

1e

e

09

f

f

1f

f

f

1f

f

f

f

1f

f

010

g1

g1

1g

g1

g1

1g

g1

g1

g1

1g

g1

011

g2

g2

2a

g2

g2

2a

g2

g2

g2

2a

g2

012

h

h

2b

h

h

2b

h

h

h

2b

h

013

i

i

2c

i

i

2c

i

i

i

2c

i

014

j

j

2d

j

j

2d

j

j

j

2d

k

015

k

k

2e

k

k

2e

k

k

k

2e

l

016

l

l

2f

l

l

2f

l

l

l

2f

l

017

m

m

2g

m

m

2g

m

m

m

2g

m

018

dp

dp

2dp

dp

dp

2dp

dp

dp

dp

2dp

dp

ADDRESS

CODE (HEX)

0x0C

D7

D6

See Table 41.

D5

D4

See Table 40.

D3

01

0

1

D2

0

0

1

1

D1

D0

See Table 38.

Table 39. Slot 2 Configuration