MAX7325AEG+T Maxim Integrated Products, MAX7325AEG+T Datasheet

IC I/O EXPANDER I2C 8B 24QSOP

MAX7325AEG+T

Manufacturer Part Number
MAX7325AEG+T
Description
IC I/O EXPANDER I2C 8B 24QSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX7325AEG+T

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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX7325 2-wire serial-interfaced peripheral features
16 I/O ports. Ports are divided into eight push-pull out-
puts and eight I/Os with selectable internal pullups and
transition detection. Eight ports are push-pull outputs
and eight I/Os may be used as a logic input or an open-
drain output. Ports are overvoltage protected to +6V.
All I/O ports configured as inputs are continuously mon-
itored for state changes (transition detection). State
changes are indicated by the INT output. The interrupt
is latched, allowing detection of transient changes.
When the MAX7325 is subsequently accessed through
the serial interface, any pending interrupt is cleared.
The open-drain outputs are rated to sink 20mA, and are
capable of driving LEDs. The RST input clears the serial
interface, terminating any I
the MAX7325.
The MAX7325 uses two address inputs with four-level
logic to allow 16 I
address also determines the power-up logic state for
the I/O ports, and enables or disables internal 40kΩ
pullups in groups of four ports.
The MAX7325 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 MAX7325 is available in 24-pin QSOP and TQFN
packages and is specified over the -40°C to +125°C
automotive temperature range.
19-3807; Rev 0; 9/06
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.
TOP VIEW
Cell Phones
SAN/NAS
Servers
SCL
SDA
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
MAX7325
Pin Configurations
16
3
2
C communication to or from
15
4
Notebooks
Satellite Radio
Automotive
14
I
5
2
13
6
Applications
C Port Expander with 8 Push-Pull
12
11
10
9
8
7
O10
O9
O8
GND
P7
P6
♦ 400kHz I
♦ +1.71V to +5.5V Operation
♦ 8 Push-Pull Outputs
♦ 8 Open-Drain I/O Ports, Rated to 20mA Sink
♦ I/O Ports are Overvoltage Protected to +6V
♦ Selectable I/O Port Power-Up Default Logic States
♦ Transient Changes are Latched, Allowing
♦ INT Output Alerts Change on Inputs
♦ 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.
*EP = Exposed paddle.
Typical Application Circuit and Functional Diagram appear
at end of data sheet.
MAX7325AEG+ -40°C to +125°C 24 QSOP
MAX7325ATG+
MAX7324
MAX7325
MAX7326
MAX7327
PART
Current
Detection Between Read Operations
Addresses
and 8 Open-Drain I/Os
PART
INPUTS
Up to 8
Up to 4
2
C Serial Interface
8
4
-40°C to +125°C
TEMP RANGE
INTERRUPT
Ordering Information
MASK
Yes
Yes
Selector Guide
PIN-PACKAGE
24 TQFN-EP*
(4mm x 4mm)
OUTPUTS
OPEN-
DRAIN
Up to 8
Up to 4
Features
PUSH-PULL
OUTPUTS
T2444-3
12
12
CODE
8
8
E24-1
PKG
1

Related parts for MAX7325AEG+T

MAX7325AEG+T Summary of contents

Page 1

... TQFN (4mm x 4mm) Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os ♦ 400kHz I ♦ +1.71V to +5.5V Operation ♦ ...

Page 2

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Supply Voltage V+....................................................-0.3V to +6V SCL, SDA, AD0, AD2, RST, INT, P0–P7 ...................-0.3V to +6V O8–O15 ........................................................-0.3V to (V+ + ...

Page 3

I 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 Data Valid Port Input Setup Time ...

Page 4

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/ +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 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 MAX7319, MAX7321, MAX7322, or MAX7323. Functional Overview The MAX7325 is a ...

Page 6

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os 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 Table 1. MAX7319–MAX7329 Family Comparison (continued PART SLAVE INPUTS INTERRUPT ADDRESS MAX7323 110xxxx MAX7328 0100xxx MAX7329 0111xxx The open-drain ports offer latching transition detection when used as inputs. All ...

Page 8

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os connected GND. This is important because the address selection is used to determine the power-up logic state and whether pullups are enabled. At power- 2 ...

Page 9

I Table 3. MAX7325 Address Map for Outputs O8–O15 PIN DEVICE ADDRESS TIO N AD2 AD0 SCL GND SCL SCL SCL SCL ...

Page 10

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os The MAX7325 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 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 the 9th clock pulse, and the recipient ...

Page 12

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/ port input data change occurs during the read sequence, then INT is reasserted during the I bit. The MAX7325 does not generate another interrupt during a ...

Page 13

I acknowledge. The new snapshot data is the current port data transmitted to the master, and therefore, port changes occuring during the transmission are detect- ed. INT remains high until the STOP condition. The master can read 2 bytes ...

Page 14

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os Typically, the master reads one byte from the push-pull ports of the MAX7325, then issues a STOP condition (Figure 8). However, the master can read two or more ...

Page 15

I diodes to V+ and GND continue to appear as a diode clamp from each output to GND (Figure 10). Each of the I/O ports P0–P7 has a protection diode to GND (Figure 11). When a port is driven ...

Page 16

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os Functional Diagram AD0 AD2 SCL INPUT CONTROL SDA FILTER POWER- RST ON RESET MAX7325 Pin Configurations (continued) TOP VIEW + INT 1 RST 2 AD2 ...

Page 17

I (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.) ______________________________________________________________________________________ C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os Package Information PACKAGE OUTLINE, ...

Page 18

I C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os (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 (continued) ...

Page 19

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2006 Maxim Integrated Products ...

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