MAX7320 Maxim, MAX7320 Datasheet

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MAX7320

Manufacturer Part Number
MAX7320
Description
The MAX7320 2-wire serial-interfaced peripheral features eight push-pull outputs with selectable power-up logic states
Manufacturer
Maxim
Datasheet

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The MAX7320 2-wire serial-interfaced peripheral fea-
tures eight push-pull outputs with selectable power-up
logic states.
The +5.5V tolerant RST input clears the serial interface,
terminating any I
MAX7320.
The MAX7320 uses two address inputs with four-level
logic to allow 16 I
address also determines the power-up state level for
the outputs in groups of four ports.
The MAX7320 supports hot insertion. The serial inter-
face SDA, SCL, AD0, AD2, and RST remain high
impedance in power-down (V+ = 0V) with up to +6V
asserted on them.
The MAX7320 is one device in a family of pin-compatible
port expanders with a choice of input ports, open-drain
I/O ports, and push-pull output ports (see Table 1).
The MAX7320 is available in 16-pin QSOP and 16-pin
TQFN packages, and is specified over the automotive
temperature range (-40°C to +125°C).
19-3879; Rev 0; 10/05
*Second source to PCF8574.
**Second source to PCF8574A.
† Pa
lC
S.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
I
Cell Phones/PDAs
Satellite Radios
Notebooks
2
MAX7319
MAX7320
MAX7321
MAX7322
MAX7323
MAX7328*
MAX7329**
C Port Expander with Eight Push-Pull Outputs
PART
________________________________________________________________ Maxim Integrated Products
2
C
2
C slave addresses. The slave
communication to or from the
General Description
INPUTS
Up to 8
Up to 4
Up to 8
8
4
Automotive
RAID
Servers
Applications
INTERRUPT MASK
Yes
Yes
♦ 400kHz, +5.5V-Tolerant I
♦ +1.71V to +5.5V Operating Voltage
♦ Eight Push-Pull Output Ports with Selectable
♦ RST Clears the Serial Interface, Terminating Any
♦ AD0 and AD2 Inputs Select from 16 Slave
♦ Low 0.6µA (typ) Standby Current
♦ -40°C to +125°C Temperature Range
+Denotes lead-free package.
Pin Configurations, Typical Application Circuit, and
Functional Diagram appear at end of data sheet.
MAX7320AEE+
MAX7320ATE+
Power-Up Logic States
Serial Transaction to or from the MAX7320
Addresses
OPEN-DRAIN OUTPUTS
PART
Up to 8
Up to 4
Up to 8
-40°C to
-40°C to
RANGE
+125°C
+125°C
TEMP
Ordering Information
PIN-
PACKAGE
16 QSOP
16 TQFN
3mm x 3mm
x 0.8mm
2
C Serial Interface
Selector Guide
PUSH-PULL OUTPUTS
MARK
TOP
ADB
Features
8
4
4
T1633-4
CODE
E16-4
PKG
1

Related parts for MAX7320

MAX7320 Summary of contents

Page 1

... SDA, SCL, AD0, AD2, and RST remain high impedance in power-down (V+ = 0V) with up to +6V asserted on them. The MAX7320 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1). The MAX7320 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40° ...

Page 2

... Total GND Current ...........................................................100mA Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

I C Port Expander with Eight Push-Pull Outputs PORT AND TIMING CHARACTERISTICS (V+ = +1.71V to +5.5V -40°C to +125°C, unless otherwise noted. Typical values are +3.3V PARAMETER SYMBOL Port Output Data ...

Page 4

I C Port Expander with Eight Push-Pull Outputs (T = +25°C, unless otherwise noted.) A STANDBY CURRENT vs. TEMPERATURE 2.0 1.8 1.6 1.4 1.2 1 +3. +2.5V 0.8 0.6 0.4 0.2 0 -40 -25 -10 ...

Page 5

... The MAX7328 and MAX7329 are second sources to the PCF8574 and PCF8574A. The MAX7324–MAX7327 family consists of four pin- compatible, 16-port expanders that integrate the func- tions of the MAX7320 and one of either the MAX7319, MAX7321, MAX7322, or MAX7323. Table 1. MAX7319–MAX7329 Family Comparison 2 I ...

Page 6

... All ports power up as inputs (or logic-high outputs). Any port can be used as an input by setting the open-drain output to logic-high. Software equivalent to a MAX7320 plus a MAX7321. Software equivalent to a MAX7320 plus a MAX7319. Software equivalent to a MAX7320 plus a MAX7322. Software equivalent to a MAX7320 plus a MAX7323 DATA WRITE I C DATA READ < ...

Page 7

... Slave Address and Power-Up Default Logic States Address inputs AD0 and AD2 determine the MAX7320 slave address and set the power-up output logic states. Power-up logic states are set in groups of four (see Table 3). The MAX7320 uses a different range of slave _______________________________________________________________________________________ ...

Page 8

... I C transmission (to any device, not necessarily the MAX7320). Write one byte to the MAX7320 to set all output port states simultaneously. The MAX7320 operates as a slave that sends and 2 receives data through interface ...

Page 9

... The MAX7320 acknowledges the slave address, and samples the logic state of the output ports during the acknowledge bit. The master can read one or more bytes from the MAX7320 and then issue a STOP condition (Figure 6). The MAX7320 transmits the _______________________________________________________________________________________ ...

Page 10

... S = START CONDITION SHADED = SLAVE TRANSMISSION P = STOP CONDITION N = NOT ACKNOWLEDGE Figure 6. Reading the MAX7320 SCL SLAVE ADDRESS S SDA START CONDITION DATA OUT FROM PORT Figure 7. Writing to the MAX7320 10 ______________________________________________________________________________________ PORT SNAPSHOT DATA R/W PORT SNAPSHOT TAKEN ...

Page 11

... V+ or lower than GND, the appropriate protection diode clamps the out- put to a diode drop above V+ or below GND. When the MAX7320 is powered down (V+ = 0V), each output port appears as a diode connected to GND (Figure 8). Power-Supply Considerations The MAX7320 operates with a supply voltage of +1.71V to +5.5V over the -40° ...

Page 12

... Compatibility with MAX6965, MAX7315, The MAX7320 is subset pin compatible with the MAX6965, MAX7315, and MAX7316. The pin differ- ences are shown in Table 4. The MAX7320 is not soft- ware compatible with MAX6965, MAX7315, or MAX7316. In many cases it is possible to design a PC board to work with all these port expanders, providing design flexibility ...

Page 13

... I C Port Expander with Eight Push-Pull Outputs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) MARKING D/2 D 0.10 C PKG 8L 3x3 REF. MIN. NOM. MAX. MIN. A 0.70 0.75 0.80 0.70 b 0.25 0.30 0.35 0.20 D 2.90 3.00 3.10 2.90 E 2.90 3.00 3.10 2.90 e 0.65 BSC. ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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