MAX6955

2-Wire Interfaced, 2.7V to 5.5V

LED Display Driver with I/O

Expander and Key Scan

Maxim Integrated | 35

www.maximintegrated.com

*

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

**

The highlighted row is used in Typical Operating Circuit 1 for display digits 6 and 7.

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

bb

1b

bb

1b

b

b

b

1b

b

03

cc

1c

cc

1c

c

c

c

1c

c

04

d1

d1

1d

d1

d1

1d

d

d

d1

1d

d

05

d2

d2

1dp

d2

d2

1dp

—

—

d2

1dp

—

06

CC6

—

CC6

CC6

CC6

CC6

—

CC6

—

—

CC6

07

—

CC7

CC7

CC7

—

—

CC7

—

CC7

CC7

CC7

08

ee

1e

ee

1e

e

e

e

1e

e

09

ff

1f

ff

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

hh

2b

hh

2b

h

h

h

2b

h

013

ii

2c

ii

2c

i

i

i

2c

i

014

jj

2d

jj

2d

j

j

j

2d

k

015

kk

2e

kk

2e

k

k

k

2e

l

016

ll

2f

ll

2f

l

l

l

2f

l

017

mm

2g

mm

2g

m

m

m

2g

m

018

dp

dp

2dp

dp

dp

2dp

dp

dp

dp

2dp

dp

ADDRESS

CODE (HEX)

0x0C

D7

01

0

1

D6

0

0

1

1

D5

D4

See Table 40.

D3

D2

See Table 39.

D1

D0

See Table 38.

Table 41. Slot 4 Configuration