MAX7310 Maxim, MAX7310 Datasheet - Page 5

• Manufacturer Part Number: MAX7310
• Description: The MAX7310 provides 8-bit parallel input/output port expansion for SMBus™-compatible and I²C-compatible applications
• Manufacturer: Maxim

Figure 1. MAX7310 Block Diagram
The MAX7310 general-purpose input/output (GPIO)
peripheral provides up to eight I/O ports, controlled
through an I
MAX7310 consists of an input port register, an output
_______________________________________________________________________________________________________
TSSOP/
QSOP
9–14
15
16
—
1
2
3
4
5
6
7
8
PIN
2
C-compatible serial interface. The
2-Wire-Interfaced 8-Bit I/O Port Expander
THIN
QFN
7–12
PAD
15
16
13
14
1
2
3
4
5
6
Detailed Description
I/O2–I/O7
Exposed
RESET
RESET
NAME
GND
SDA
SDA
AD0
AD1
AD2
AD0
AD1
AD2
SCL
SCL
I/O0
I/O1
pad
V+
V+
N
Serial Clock Line
Serial Data Line
Address Input 0
Address Input 1
Address Input 2
Input/Output Port 0 (Open Drain)
Input/Output Port 1
Supply Ground
Input/Output Port 2—Input/Output Port 7
External Reset (Active Low). Pull RESET low to configure I/O pins as inputs. Set RESET
high for normal operation.
Supply Voltage. Bypass with a 0.047µF capacitor to GND.
Exposed Pad on Package Underside. Connect to GND.
POWER-ON
FILTER
INPUT
RESET
CONTROL
SMBus
GND
port register, a polarity inversion register, a configura-
tion register, and a bus timeout register. An active-low
reset input sets the eight I/O lines as inputs. Three
slave ID address select pins (AD0, AD1, and AD2)
choose one of 56 slave ID addresses (Figure 1).
WRITE PULSE
READ PULSE
MAX7310
8 BIT
OUTPUT
INPUT/
PORTS
FUNCTION
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
with Reset
Pin Description
5