MAX7327AEG Maxim Integrated, MAX7327AEG Datasheet

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MAX7327AEG

Manufacturer Part Number
MAX7327AEG
Description
Interface - I/O Expanders I2C Port Expander w/12 P-P Out & 4 I/O
Manufacturer
Maxim Integrated
Series
MAX7327r
Datasheet

Specifications of MAX7327AEG

Mounting Style
SMD/SMT
Package / Case
QSOP-24

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Part Number:
MAX7327AEG
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The MAX7327, a 2-wire serial-interfaced peripheral,
features 12 push-pull outputs and four configurable
open-drain I/O ports with selectable internal pullups
and transition detection. Ports are overvoltage protect-
ed to +6V, independent of supply voltage.
The four I/O ports configured as inputs are continuously
monitored for state changes (transition detection). State
changes are indicated by the open-drain, +6V-tolerant
INT output. The interrupt is latched, detecting transient
changes. When the MAX7327 is subsequently accessed
through the serial interface, any pending interrupt is
cleared. The 12 push-pull and the four open-drain out-
puts are rated to sink 20mA, and are capable of driving
LEDs. The RST input clears the serial interface, terminat-
ing any I
The MAX7327 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 two ports.
The MAX7327 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 MAX7327 is available in the 24-pin QSOP and
TQFN packages, and is specified over the -40°C to
+125°C automotive temperature range.
19-3805; Rev 0; 8/06
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
2
C communication to or from the MAX7327.
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
MAX7327
16
3
Pin Configurations
I
15
4
2
14
Notebooks
Satellite Radio
Automotive
5
C Port Expander with 12 Push-Pull
13
6
Applications
12
11
10
9
8
7
O10
O9
O8
GND
O7
O6
Outputs and 4 Open-Drain I/Os
♦ 400kHz I
♦ +1.71V to +5.5V Operating Voltage
♦ 12 Push-Pull Output Ports, Rated at 20mA Sink
♦ 4 Open-Drain I/O Ports, Rated at 20mA Sink Current
♦ I/O Ports are Overvoltage Protected to +6V
♦ Selectable I/O Port Power-Up Default Logic States
♦ Transient Changes are Latched, Allowing Detection
♦ INT Output Alerts Changes 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 pad.
Typical Application Circuit and Functional Diagram appear
at end of data sheet.
MAX7327AEG+ -40°C to +125°C 24 QSOP
MAX7327ATG+
MAX7327AATG+ -40°C to +125°C
MAX7324
MAX7325
MAX7326
MAX7327
PART
Current
Between Read Operations
Addresses
PART
INPUTS
2
Up to 8
Up to 4
C Serial Interface
8
4
-40°C to +125°C
TEMP RANGE PIN-PACKAGE
INTERRUPT
Ordering Information
MASK
Yes
Yes
Selector Guide
24 TQFN - E P **
( 4m m x 4m m )
24 TQFN - E P **
( 3.5m m x 3.5m m )
OUTPUTS
Up to 8
Up to 4
OPEN-
DRAIN
Features
PUSH-PULL
OUTPUTS
T243A3-1
T2444-3
12
12
CODE
E24-1
8
8
PKG
1

Related parts for MAX7327AEG

MAX7327AEG Summary of contents

Page 1

... INT Output Alerts Changes on Inputs ♦ AD0 and AD2 Inputs Select from 16 Slave Addresses ♦ Low 0.6µA (typ) Standby Current ♦ -40°C to +125°C Temperature Range PART MAX7327AEG+ -40°C to +125°C 24 QSOP MAX7327ATG+ MAX7327AATG+ -40°C to +125°C Applications +Denotes lead-free package. **EP = Exposed pad. ...

Page 2

I C Port Expander with 12 Push-Pull Outputs and 4 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, P2–P5 ..................-0.3V to +6V O0, O1, O6–O15 .............................................-0.3V ...

Page 3

I C Port Expander with 12 Push-Pull 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 12 Push-Pull Outputs and 4 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 0.4 V+ ...

Page 5

I C Port Expander with 12 Push-Pull 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, or ...

Page 6

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

Page 7

I C Port Expander with 12 Push-Pull Table 1. MAX7319–MAX7329 Family Comparison (continued PART SLAVE INPUTS INTERRUPT ADDRESS MAX7323 110xxxx MAX7328 0100xxx MAX7329 0111xxx The four open-drain ports offer latching ...

Page 8

I C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os address can be configured dynamically in the applica- tion without cycling the device supply. On initial power-up, the MAX7327 cannot decode the address inputs AD0 and AD2 ...

Page 9

I C Port Expander with 12 Push-Pull Table 3. MAX7327 Address Map for Outputs O8–O15 PIN DEVICE ADDRESS TIO N AD2 AD0 SCL GND SCL ...

Page 10

I C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os The MAX7327 operates as a slave that sends and 2 receives data through interface. The interface uses a serial-data line (SDA) and a serial-clock ...

Page 11

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

Page 12

I C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os A single-byte read from the group B ports of the MAX7327 returns the status of the eight output ports, read back as inputs. A 2-byte read from ...

Page 13

I C Port Expander with 12 Push-Pull sition detection. INT deasserts during the slave 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. ...

Page 14

I C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os bytes from the group B ports of the MAX7327, then issues a STOP condition. In this case, the MAX7327 resamples the port outputs during each acknowledge and ...

Page 15

I C Port Expander with 12 Push-Pull diodes to V+ and GND continue to appear as a diode clamp from each output to GND (Figure 10). Each of the four I/O ports P2–P5 has a protection diode to GND ...

Page 16

I C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os Functional Diagram AD0 AD2 SCL INPUT CONTROL SDA FILTER POWER-ON RST RESET MAX7327 Pin Configurations (continued) TOP VIEW INT 1 RST 2 AD2 3 ...

Page 17

I C Port Expander with 12 Push-Pull (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.) ______________________________________________________________________________________ Outputs and 4 Open-Drain I/Os Package Information PACKAGE ...

Page 18

I C Port Expander with 12 Push-Pull Outputs and 4 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 ...

Page 19

I C Port Expander with 12 Push-Pull (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.) ______________________________________________________________________________________ Outputs and 4 Open-Drain I/Os Package Information (continued) ...

Page 20

I C Port Expander with 12 Push-Pull Outputs and 4 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.) 20 ______________________________________________________________________________________ Package Information ...

Page 21

... 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 ____________________ 21 © 2006 Maxim Integrated Products ...

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