MAX7324AEG+ Maxim Integrated Products, MAX7324AEG+ Datasheet

IC I/O EXPANDER I2C 8B 24QSOP

MAX7324AEG+

Manufacturer Part Number
MAX7324AEG+
Description
IC I/O EXPANDER I2C 8B 24QSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX7324AEG+

Interface
I²C
Number Of I /o
8
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
Operating Supply Voltage
1.71 V to 5.5 V
Power Dissipation
761.9 mW
Operating Temperature Range
- 40 C to + 125 C
Input Voltage
1.65 V to 1.197 V
Maximum Clock Frequency
400 KHz
Mounting Style
SMD/SMT
Output Voltage
0.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX7324 2-wire serial-interfaced peripheral fea-
tures 16 I/O ports that are divided into eight push-pull
outputs and eight inputs. Each input features selectable
internal pullups, overvoltage protection to +6V, and
transition detection with an interrupt output.
All input ports are continuously monitored for state
changes (transition detection). The interrupt is latched,
allowing detection of transient changes. Any combina-
tion of inputs can be selected using the interrupt mask
to assert the INT output. When the MAX7324 is subse-
quently accessed through the serial interface, any
pending interrupt is cleared.
The push-pull outputs are rated to sink 20mA and are
capable of driving LEDs. The RST input clears the serial
interface, terminating any I
the MAX7324.
The MAX7324 uses two address inputs with four-level
logic to allow 16 I
address also enables or disables internal 40kΩ pullups
in groups of four ports.
The MAX7324 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 MAX7324 is available in 24-pin QSOP and TQFN
packages, and is specified over the -40°C to +125°C
automotive temperature range.
19-3785; 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.
I
2
Pin Configurations continued at end of data sheet.
TOP VIEW
C Port Expander with Eight Push-Pull Outputs
Cell Phones
SAN/NAS
Servers
SDA
SCL
AD2
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
MAX7324
Pin Configurations
16
3
2
C communication to or from
15
4
14
Notebooks
Automotive
Satellite Radio
5
Applications
13
6
12
11
10
9
8
7
O10
O9
O8
GND
I7
I6
♦ 400kHz, +6V-Tolerant I
♦ +1.71V to +5.5V Operating Voltage
♦ Eight Push-Pull Outputs
♦ Eight Input Ports with Maskable, Latching
♦ 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.
MAX7324AEG+
MAX7324ATG+
MAX7324
MAX7325
MAX7326
MAX7327
PART
Transition Detection
Detection Between Read Operations
Inputs
Addresses
PART
INPUTS
Up to 8
Up to 4
8
4
and Eight Inputs
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
INTERRUPT
Ordering Information
MASK
Yes
Yes
2
C Serial Interface
Selector Guide
OUTPUTS
PIN-
PACKAGE
24 QSOP
24 TQFN-EP*
(4mm x 4mm)
Up to 8
Up to 4
OPEN-
DRAIN
Features
PUSH-PULL
OUTPUTS
T2444-3
12
12
CODE
E24-1
8
8
PKG
1

Related parts for MAX7324AEG+

MAX7324AEG+ Summary of contents

Page 1

... Detection Between Read Operations ♦ INT Output Alerts Change on Any Selection of Inputs ♦ AD0 and AD2 Inputs Select from 16 Slave Addresses ♦ Low 0.6µA Standby Current ♦ -40°C to +125°C Temperature Range PART MAX7324AEG+ MAX7324ATG+ +Denotes lead-free package. Applications *EP = Exposed paddle. PART MAX7324 13 ...

Page 2

I C Port Expander with Eight Push-Pull Outputs and Eight Inputs ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Supply Voltage V+....................................................-0.3V to +6V SCL, SDA, AD0, AD2, RST, INT, I0–I7......................-0.3V to +6V O8–O15………….…………………………..…-0.3V to (V+ + 0.3V) O8–O15 ...

Page 3

I C Port Expander with Eight 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-Output ...

Page 4

I C Port Expander with Eight Push-Pull Outputs and Eight Inputs (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 ...

Page 5

I C Port Expander with Eight Push-Pull Outputs Detailed Description MAX7324–MAX7327 Family Comparison The MAX7324–MAX7327 family consists of four pin- compatible, 16-port expanders that integrate the func- tion of the MAX7320 and one of either the MAX7319, MAX7321, MAX7322, ...

Page 6

I C Port Expander with Eight Push-Pull Outputs and Eight 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 Eight Push-Pull Outputs Table 1. MAX7319–MAX7329 Family Comparison (continued PART SLAVE INPUTS INTERRUPT ADDRESS MAX7323 110xxxx MAX7328 0100xxx MAX7329 0111xxx A latching interrupt output, INT, ...

Page 8

I C Port Expander with Eight Push-Pull Outputs and Eight Inputs Table 2. MAX7324 Address Map for Inputs I0–I7 PIN CONNECTION DEVICE ADDRESS AD2 AD0 SCL GND SCL SCL ...

Page 9

I C Port Expander with Eight Push-Pull Outputs Table 3. MAX7324 Address Map for Outputs O8–O15 PIN CONNECTION DEVICE ADDRESS AD2 AD0 SCL GND SCL SCL SCL 1 0 ...

Page 10

I C Port Expander with Eight Push-Pull Outputs and Eight Inputs The MAX7324 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 Eight 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 Eight Push-Pull Outputs and Eight Inputs If a port input data change occurs during the read sequence, INT is reasserted during the I The MAX7324 does not generate another interrupt dur- ing a single-byte ...

Page 13

I C Port Expander with Eight Push-Pull Outputs When the master reads 2 bytes from the output ports of the MAX7324 and subsequently issues a STOP condi- tion (Figure 7), the MAX7324 transmits the current port data, followed by ...

Page 14

I C Port Expander with Eight Push-Pull Outputs and Eight Inputs Writing to the MAX7324 A write to the input ports of the MAX7324 starts with the master transmitting the group’s slave address with the R/W bit set low. ...

Page 15

I C Port Expander with Eight Push-Pull Outputs Applications Information 2 Port Input and I C Interface Level Translation from Higher or Lower SDA, SCL, AD0, AD2, RST, INT, and I0–I7 are overvolt- age protected to +6V. This allows ...

Page 16

I C Port Expander with Eight Push-Pull Outputs and Eight Inputs Set the port output low to light the LED. Choose the resistor value according to the following formula LED SUPPLY LED ...

Page 17

I C Port Expander with Eight Push-Pull Outputs Functional Diagram AD0 AD2 SCL 2 INPUT I C CONTROL FILTER SDA POWER- RST ON RESET MAX7324 Pin Configurations (continued) TOP VIEW + INT 1 RST 2 AD2 3 MAX7324 I0 ...

Page 18

I C Port Expander with Eight Push-Pull Outputs and Eight 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 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.) ______________________________________________________________________________________ and Eight 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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