MAX7313ATG+T Datasheet MAX7313ATG+T, MAX7313ATG+, MAX7313AEG+ | P22-P24

MAX7313

16-Port I/O Expander with LED Intensity

Control, Interrupt, and Hot-Insertion Protection

22 ______________________________________________________________________________________

Table 14. Output Intensity Registers

ADDRESS

CODE

(HEX)

D7 D6 D5 D4 D3 D2 D1 D0

MSB LSB MSB

LSB

OUTPUTS P1, P0 INTENSITY

R/W

OUTPUT P1 INTENSITY OUTPUT P0 INTENSITY

Write output P1, P0 intensity

Read back output P1, P0 intensity

P1I3 P1I2 P1I1 P1I0 P0I3 P0I2 P0I1

P0I0

Output P1 intensity duty cycle is 1/16

—

0000————

Output P1 intensity duty cycle is 2/16

—

0001————

Output P1 intensity duty cycle is 3/16

—

0010————

—

————————

Output P1 intensity duty cycle is 14/16

—

1101————

Output P1 intensity duty cycle is 15/16

—

1110————

Output P1 intensity duty cycle is 16/16

(static logic level, no PWM)

—

1111————

Output P0 intensity duty cycle is 1/16

—

———— 0 0 0 0

Output P0 intensity duty cycle is 2/16

—

———— 0 0 0 1

Output P0 intensity duty cycle is 3/16

—

———— 0 0 1 0

—

————————

Output P0 intensity duty cycle is 14/16

—

———— 1 1 0 1

Output P0 intensity duty cycle is 15/16

—

———— 1 1 1 0

Output P0 intensity duty cycle is 16/16

(static logic level, no PWM)

—

0X10

———— 1 1 1 1

MSB LSB MSB

LSB

OUTPUTS P3, P2 INTENSITY

OUTPUT P3 INTENSITY OUTPUT P2 INTENSITY

Write output P3, P2 intensity

Read back output P3, P2 intensity

0x11

P3I3 P3I2 P3I1 P3I0 P2I3 P2I2 P2I1

P2I0

MSB LSB MSB

LSB

OUTPUTS P5, P4 INTENSITY

OUTPUT P5 INTENSITY OUTPUT P4 INTENSITY

Write output P5, P4 intensity

Read back output P5, P4 intensity

0x12

P5I3 P5I2 P5I1 P5I0 P4I3 P4I2 P4I1

P4I0

MSB LSB MSB

LSB

OUTPUTS P7, P6 INTENSITY

OUTPUT P7 INTENSITY OUTPUT P6 INTENSITY

Write output P7, P6 intensity

Read back output P7, P6 intensity

0x13

P7I3 P7I2 P7I1 P7I0 P6I3 P6I2 P6I1

P6I0

MAX7313

16-Port I/O Expander with LED Intensity

Control, Interrupt, and Hot-Insertion Protection

______________________________________________________________________________________ 23

Table 14. Output Intensity Registers (continued)

ADDRESS

CODE

(HEX)

D7 D6 D5 D4 D3 D2 D1 D0

MSB LSB MSB

LSB

OUTPUTS P9, P8 INTENSITY

R/W

OUTPUT P9 INTENSITY OUTPUT P8 INTENSITY

Write output P9, P8 intensity

Read back output P9, P8 intensity

0x14

P9I3 P9I2 P911 P9I0 P8I3 P812 P811

P810

MSB LSB MSB

LSB

OUTPUTS P11, P10 INTENSITY

OUTPUT P11 INTENSITY OUTPUT P10 INTENSITY

Write output P11, P10 intensity

Read back output P11, P10 intensity

0x15

P11I3 P11I2 P11I1 P11I0 P10I3 P10I2 P10I1

P10I0

MSB LSB MSB

LSB

OUTPUTS 13, P12 INTENSITY

OUTPUT P13 INTENSITY OUTPUT P12 INTENSITY

Write output P13, P12 intensity

Read back output P13, P12 intensity

0x16

P13I3 P13I2 P13I1 P13I0 P12I3 P12I2 P12I1

P12I0

MSB LSB MSB

LSB

OUTPUTS P15, P14 INTENSITY

OUTPUT P15 INTENSITY OUTPUT P14 INTENSITY

Write output P15, P14intensity

Read back output P15, P14 intensity

0x17

P15I3 P15I2 P15I1 P15I0 P14I3 P14I2 P14I1

P14I0

OUTPUT O16 INTENSITY See master, O16 intensity register (Table 13).

Table 15. MAX7311, PCA9535, and PCA9555 Register Compatibility

MAX7311,

PCA9535,

PCA9555

ADDRESS MAX7313 IMPLEMENTATION

MAX7311, PCA9535,

PCA9555

IMPLEMENTATION

COMMENTS

Inputs P15–P0 0x00, 0x01 Inputs registers Implemented Same functionality

Outputs P15–P0 0x02, 0x03 Blink phase 0 registers Implemented Same functionality

Polarity inversion 0x04, 0x05

Not implemented; register writes are

ignored; register reads return 0x00

Implemented;

power-up default is

0x00

If polarity inversion feature

is unused, MAX7313

defaults to correct state

Configuration 0x06, 0x07 Ports configuration registers Not implemented Same functionality

No registers 0x0B, 0x0C Blink phase 1 registers Not implemented

No register 0x0E Master, O16 intensity register Not implemented

No register 0x0F Configuration register Not implemented

No registers 0x10–0x17 Outputs intensity registers Not implemented

Power-up default disables

the blink and intensity

(PWM) features

MAX7313

Driving Load Currents Higher than 50mA

The MAX7313 can be used to drive loads drawing more

than 50mA, like relays and high-current white LEDs, by

paralleling outputs. Use at least one output per 50mA of

load current; for example, a 5V 330mW relay draws

66mA and needs two paralleled outputs to drive it.

Ensure that the paralleled outputs chosen are controlled

by the same blink phase register, i.e., select outputs

from the P0 through P7 range, or the P8 through P15

range. This way, the paralleled outputs are turned on

and off together. Do not use output O16 as part of a

load-sharing design. O16 cannot be switched at the

same time as any of the other outputs because it is con-

trolled by a different register.

The MAX7313 must be protected from the negative

voltage transient generated when switching off induc-

tive loads, such as relays, by connecting a reverse-

biased diode across the inductive load (Figure 18). The

peak current through the diode is the inductive load’s

operating current.

Power-Supply Considerations

The MAX7313 operates with a power-supply voltage of

2V to 3.6V. Bypass the power supply to GND with at

least 0.047µF as close to the device as possible.

For the QFN version, connect the underside exposed

pad to GND.

16-Port I/O Expander with LED Intensity

Control, Interrupt, and Hot-Insertion Protection

24 ______________________________________________________________________________________

Figure 18. Diode-Protected Switching Inductive Load

MAX7313

P10

V+

2V TO 3.6V

µC

SDA

SCL

SDA

I/O

AD0

P11

P12

P13

P14

P15

SCL

GND

AD2

AD1

0.047µF

INT/O16

BAS16

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P26

MAX7313ATG+T

Mfr. #:

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Manufacturer:

Maxim Integrated

Description:

Interface - I/O Expanders 16-Bit I/O Port Expander

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MAX7313ATG+T

MAX7313ATG+T

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