MAX7326AEG+ Maxim Integrated Products, MAX7326AEG+ Datasheet

IC I/O EXPANDER I2C 16B 24QSOP

MAX7326AEG+

Manufacturer Part Number
MAX7326AEG+
Description
IC I/O EXPANDER I2C 16B 24QSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX7326AEG+

Interface
I²C
Number Of I /o
16
Interrupt Output
Yes
Frequency - Clock
400kHz
Voltage - Supply
1.71 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
24-QSOP
Includes
POR
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX7326 2-wire serial-interfaced peripheral fea-
tures 16 I/O ports. The ports are divided into 12 push-
pull outputs and four input ports with selectable internal
pullups. Input ports are overvoltage protected to +6V
and feature transition detection with interrupt output.
The four input ports are continuously monitored for
state changes (transition detection). The interrupt is
latched, allowing detection of transient changes. Any
combination of inputs can be selected using the inter-
rupt mask to assert the open-drain, +6V-tolerant INT
output. When the MAX7326 is subsequently accessed
through the serial interface, any pending interrupt is
cleared. The 12 push-pull outputs are rated to sink
20mA and are capable of driving LEDs. The RST input
clears the serial interace, terminating any I
cation to or from the MAX7326.
The MAX7326 uses two address inputs with four-level
logic to allow 16 I
address also sets the power-up default state for the 12
output ports and enables or disables internal 40kΩ
pullups in groups of two input ports.
The MAX7326 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 MAX7326 is available in 24-pin QSOP and TQFN
packages and is specified over the -40°C to +125°C
automotive temperature range.
19-3804; Rev 0; 10/06
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.
Pin Configurations continued at end of data sheet.
Cell Phones
SAN/NAS
Servers
TOP VIEW
I
2
SCL
SDA
AD2
C Port Expander with 12 Push-Pull Outputs
RST
INT
V+
19
20
21
22
23
24
+
________________________________________________________________ Maxim Integrated Products
18
TQFN (4mm x 4mm)
1
2
C slave addresses. The slave
17
2
EXPOSED PADDLE
General Description
MAX7326
Pin Configurations
16
3
15
4
Notebooks
Satellite Radio
Automotive
14
5
13
Applications
6
12
11
10
9
8
7
O10
O9
O8
GND
O7
O6
2
C communi-
♦ 400kHz I
♦ +1.71V to +5.5V Operating Voltage
♦ 12 Push-Pull Outputs Rated at 20mA Sink Current
♦ 4 Input Ports with Matchable Latching Transition
♦ Input Ports are Overvoltage Protected to +6V
♦ Transient Changes are Latched, Allowing
♦ INT Output Alerts Change on Any Selection of
♦ AD0 and AD2 Inputs Select from 16 Slave
♦ Low 0.6µA Standby Current
♦ -40°C to +125°C Temperature Range
+Denotes lead-free package.
*EP = Exposed paddle.
Typical Application Circuit and Functional Diagram appear
at end of data sheet.
MAX7324
MAX7325 Up to 8
MAX7326
MAX7327
MAX7326AEG+
MAX7326ATG+
PART
Detection
Detection Between Read Operations
Inputs
Addresses
PART
INPUTS
Up to 4
2
C Serial Interface
8
4
-40°C to +125°C 24 QSOP
-40°C to +125°C
TEMP RANGE
INTERRUPT
Ordering Information
MASK
Yes
Yes
and 4 Inputs
Selector Guide
OUTPUTS
PIN-
PACKAGE
24 TQFN-EP*
(4mm x 4mm)
Up to 8
Up to 4
OPEN-
DRAIN
Features
PUSH-PULL
OUTPUTS
T-2444-3
12
12
CODE
E24-1
8
8
PKG
1

Related parts for MAX7326AEG+

MAX7326AEG+ Summary of contents

Page 1

... INT Output Alerts Change on Any Selection of Inputs ♦ AD0 and AD2 Inputs Select from 16 Slave Addresses 2 C communi- ♦ Low 0.6µA Standby Current ♦ -40°C to +125°C Temperature Range PART MAX7326AEG+ MAX7326ATG+ Applications +Denotes lead-free package. *EP = Exposed paddle. PART 13 12 O10 ...

Page 2

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Supply Voltage V+....................................................-0.3V to +6V SCL, SDA, AD0, AD2, RST, INT, I2–I5......................-0.3V to +6V O0, O1, O6–O15 .............................................-0. ...

Page 3

I C Port Expander with 12 Push-Pull Outputs PORT AND INTERRUPT INT TIMING CHARACTERISTICS (V+ = +1.71V to +5.5V -40°C to +125°C, unless otherwise noted. Typical values are +3.3V PARAMETER SYMBOL Port ...

Page 4

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs (T = +25°C, unless otherwise noted.) A STANDBY CURRENT 2.0 1.8 1.6 1.4 1.2 1 +2.5V 0.8 0.6 0.4 0.2 0 -40 -25 - ...

Page 5

I C Port Expander with 12 Push-Pull Outputs Detailed Description MAX7319–MAX7329 Family Comparison 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, ...

Page 6

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs Table 1. MAX7319–MAX7329 Family Comparison (continued INPUT PART SLAVE INPUTS INTERRUPT ADDRESS MASK MAX7326 4 101xxxx and 110xxxx MAX7327 8-PORT EXPANDERS MAX7319 ...

Page 7

I C Port Expander with 12 Push-Pull Outputs Table 1. MAX7319–MAX7329 Family Comparison (continued PART SLAVE INPUTS INTERRUPT ADDRESS MAX7323 110xxxx MAX7328 0100xxx MAX7329 0111xxx When the MAX7326 is read ...

Page 8

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs Table 2. MAX7326 Address Map for Ports O0, O1, I2–I5, O6, and O7 PIN DEVICE ADDRESS CONNECTION AD2 AD0 SCL GND 1 1 ...

Page 9

I C Port Expander with 12 Push-Pull Outputs Table 3. MAX7326 Address Map for Outputs O8–O15 PIN CONNECTION AD2 AD0 A6 A5 SCL GND 1 0 SCL SCL SCL 1 0 SCL SDA 1 0 SDA ...

Page 10

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs The MAX7326 operates as a slave that sends and 2 receives data through interface. The interface uses a serial-data line (SDA) and a serial-clock line ...

Page 11

I C Port Expander with 12 Push-Pull Outputs The acknowledge bit is a clocked 9th bit the recipient uses to acknowledge receipt of each byte of data (Figure 4). Each byte transferred effectively requires 9 bits. The master generates ...

Page 12

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs If a port input data change occurs during the read sequence, then INT is reasserted during the I bit. The MAX7326 does not generate another interrupt during a ...

Page 13

I C Port Expander with 12 Push-Pull Outputs The master can read 2 bytes from the group A ports of the MAX7326 and then issues a STOP condition this case, the MAX7326 transmits the current port data, followed by ...

Page 14

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs Writing to the MAX7326 A write to the group A ports of the MAX7326 starts with the master transmitting the group’s slave address with the R/W bit set ...

Page 15

I C Port Expander with 12 Push-Pull Outputs Applications Information 2 Port Input and I C Interface Level Translation from Higher or Lower The MAX7326’s SDA, SCL, AD0, AD2, RST, INT, and I2–I5 are overvoltage protected to +6V independent ...

Page 16

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs Choose the resistor value according to the following formula LED SUPPLY LED where the resistance of the resistor in ...

Page 17

I C Port Expander with 12 Push-Pull Outputs Functional Diagram AD0 AD2 SCL INPUT FILTER CONTROL SDA POWER- RST ON RESET MAX7326 GND Pin Configurations (continued) TOP VIEW + INT 1 24 RST 2 23 AD2 ...

Page 18

I C Port Expander with 12 Push-Pull Outputs and 4 Inputs (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.) 18 ______________________________________________________________________________________ Package Information PACKAGE ...

Page 19

I C Port Expander with 12 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.) ______________________________________________________________________________________ and 4 Inputs Package Information (continued) PACKAGE ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products Package Information (continued) PACKAGE OUTLINE, QSOP .150" ...

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