MAX7316 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX7316
Maxim Integrated
MAX7316 Datasheet PDF : 24 Pages
| |||
10-Port I/O Expander with LED Intensity
Control, Interrupt, and Hot-Insertion Protection
PIN
QSOP
1
2
QFN
15
16
3
4–7, 9–12
8
13
14
15
16
—
1
2–5, 7–10
6
11
12
13
14
PAD
Pin Description
NAME
FUNCTION
BLINK
Input Port Configurable as Blink Control or General-Purpose Input
RST
Reset Input. Active low clears the 2-wire interface and puts the device in the
same condition as power-up reset.
AD0
Address Input. Sets device slave address. Connect to either GND, V+, SCL,
or SDA to give four logic combinations. See Table 1.
P0–P7
GND
Input/Output Ports. P0–P7 are open-drain I/Os rated at 5.5V, 50mA.
Ground. Do not sink more than 190mA into the GND pin.
INT/O8
SCL
SDA
Output Port. Open-drain output rated at 7V, 50mA. Configurable as interrupt
output or general-purpose output.
I2C-Compatible Serial Clock Input
I2C-Compatible Serial Data I/O
V+
Positive Supply Voltage. Bypass V+ to GND with a 0.047µF ceramic
capacitor.
Exposed pad Exposed Pad on Package Underside. Connect to GND.
DATA FROM
SHIFT REGISTER
DATA FROM
SHIFT REGISTER
WRITE
CONFIGURATION
PULSE
CONFIGURATION
REGISTER
DQ
FF
CK Q
OUTPUT
PORT
REGISTER
DQ
FF
WRITE PULSE
CK Q
READ PULSE
Figure 1. Simplified Schematic of I/O Ports
INPUT PORT
REGISTER
DQ
FF
CK Q
OUTPUT PORT
REGISTER DATA
I/O PIN
Q2
GND
INPUT PORT
REGISTER DATA
TO INT
Functional Overview
The MAX7316 is a general-purpose input/output (GPIO)
peripheral that provides eight I/O ports, P0–P7, con-
trolled through an I2C-compatible serial interface. A 9th
output-only port, INT/O8, can be configured as an inter-
rupt output or as a general-purpose output port. All out-
put ports sink loads up to 50mA connected to external
supplies up to 5.5V, independent of the MAX7316’s
supply voltage. The MAX7316 is rated for a ground cur-
rent of 190mA, allowing all nine outputs to sink 20mA at
the same time. Figure 1 shows the output structure of
the MAX7316. The ports default to inputs on power-up.
6 _______________________________________________________________________________________
Share Link: