MAX7318AWG-T Maxim Integrated, MAX7318AWG-T Datasheet - Page 11

• Manufacturer Part Number: MAX7318AWG-T
• Description: Interface - I/O Expanders 16-Bit I/O Port Expander
• Manufacturer: Maxim Integrated
• Series: MAX7318r

Specifications of MAX7318AWG-T

• Maximum Operating Frequency: 400 KHz
• Operating Supply Voltage: 2 V to 5.5 V
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-24 Wide
• Output Current: 43 mA
• Power Dissipation: 1667 mW

The output port registers (Table 3) set the outgoing
logic levels of the I/Os defined as outputs by the
respective configuration register. Reads from the output
port registers reflect the value that is in the flip-flop con-
trolling the output selection, not the actual I/O value.
The polarity inversion registers (Table 4) enable polarity
inversion of pins defined as inputs by the respective
port configuration registers. Set the bit in the polarity
inversion register to invert the corresponding port pin’s
polarity. Clear the bit in the polarity inversion register to
retain the corresponding port pin’s original polarity.
The configuration registers (Table 5) configure the
directions of the I/O pins. Set the bit in the respective
configuration register to enable the corresponding port
as an input. Clear the bit in the configuration register to
enable the corresponding port as an output.
Table 2. Registers 0x00, 0x01—Input Port Registers
Table 3. Registers 0x02, 0x03—Output Port Registers
Table 4. Registers 0x04, 0x05—Polarity Inversion Registers
Table 5. Registers 0x06, 0x07—Configuration Registers
Power-up default
Power-up default
Power-up default
BIT
BIT
BIT
BIT
2-Wire-Interfaced, 16-Bit, I/O Port Expander
with Interrupt and Hot-Insertion Protection
______________________________________________________________________________________
I/O15
I/O15
I15
O15
I/O7
I/O7
I7
O7
1
0
1
Polarity Inversion Registers
Configuration Registers
Output Port Registers
I/O14
I/O14
I14
O14
I/O6
I/O6
I6
O6
1
0
1
I/O13
I/O13
O13
I/O5
I13
I/O5
O5
I5
1
0
1
I/O12
I/O12
O12
I/O4
I/O4
I12
O4
I4
1
0
1
The MAX7318 goes into standby when the I
idle. Standby supply current is typically 5.4µA.
The I/O ports I/O0–I/O15, interrupt output INT, and serial
interface SDA, SCL, AD0–2 remain high impedance with
up to 6V asserted on them when the MAX7318 is pow-
ered down (V+ = 0V). The MAX7318 can therefore be
used in hot-swap applications. Note that each I/O’s
100kΩ pullup effectively becomes a 100kΩ pulldown
when the MAX7318 is powered down.
The MAX7318 operates from a supply voltage of 2V to
5.5V. Bypass the power supply to GND with a 0.047µF
capacitor as close to the device as possible. For the
QFN version, connect the exposed pad to GND.
I/O11
I/O11
O11
I/O3
I/O3
I11
O3
I3
1
0
1
Applications Information
Power-Supply Consideration
I/O10
I/O10
O10
I/O2
I/O2
I10
O2
I2
1
0
1
I/O1
I/O9
I/O1
I/O9
O1
O9
I1
I9
1
0
1
Hot Insertion
Standby
2
C bus is
I/O0
I/O8
I/O0
I/O8
O0
O8
I0
I8
1
0
1
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