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MAX7319ATE+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
General Description
The MAX7319 2-wire serial-interfaced peripheral fea-
tures eight input ports with selectable internal pullups,
overvoltage protection to +6V, and transition detection
with interrupt output.
All input ports are continuously monitored for state
changes (transition detection). Transitions are latched,
allowing detection of transient changes. Any combination
of inputs can be selected using the interrupt mask to
assert the INT output. When the MAX7319 is subsequently
accessed through the serial interface, any pending inter-
rupt is cleared.
The +5.5V tolerant RST input clears the serial interface,
terminating any I
2
C
†
communication to or from the
MAX7319.
The MAX7319 uses two address inputs with four-level
logic to allow 16 I
2
C slave addresses. The slave
address also enables or disables internal 40kΩ pullups
in groups of four ports.
The MAX7319 supports hot insertion. All eight input
ports, the serial interface SDA, SCL, AD0, AD2, INT,
and RST remain high impedance in power-down (V+ =
0) with up to +6V asserted on them.
The MAX7319 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 MAX7319 is available in 16-pin QSOP and 16-pin
TQFN packages, and is specified over the automotive
temperature range (-40°C to +125°C).
Applications
Features
♦ 400kHz, +5.5V-Tolerant I
2
C Serial Interface
♦ +1.71V to +5.5V Operating Voltage
♦ Eight Input Ports with Maskable, Latching
Transition Detection
♦ Input Ports are Overvoltage Protected to +6V
♦ Transient Changes are Latched, Allowing
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 (typ) Standby Current
♦ -40°C to +125°C Operating Temperature Range
MAX7319
I
2
C Port Expander with Eight Inputs and
Maskable Transition Detection
________________________________________________________________ Maxim Integrated Products 1
19-3809; Rev 1; 10/05
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.
EVALUATION KIT
AVAILABLE
Ordering Information
PART PIN-PACKAGE TOP MARK PKG CODE
MAX7319AEE+ 16 QSOP — E16-4
MAX7319ATE+ 16 TQFN-EP* ADA T1633-4
Selector Guide
PART INPUTS INTERRUPT MASK OPEN-DRAIN OUTPUTS PUSH-PULL OUTPUTS
MAX7319 8 Yes — —
MAX7320 — — — 8
MAX7321 Up to 8 — Up to 8 —
MAX7322 4 Yes — 4
MAX7323 Up to 4 — Up to 4 4
MAX7328* — —
MAX7329**
Up to 8
—
Up to 8
—
*Second source to PCF8574.
**Second source to PCF8574A.
†
P
a
l
C
S.
Cell Phones
SAN/NAS
Servers
Notebooks
Satellite Radio
Automotive
Note: All devices specified over -40°C to +125°C operating range.
+Denotes lead-free package.
*EP = Exposed pad.
Pin Configurations, Typical Application Circuit, and
Functional Diagram appear at end of data sheet.
MAX7319
I
2
C Port Expander with Eight Inputs and
Maskable Transition Detection
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
(All voltages referenced to GND.)
Supply Voltage V+....................................................-0.3V to +6V
SCL, SDA, AD0, AD2, RST, INT, I0–I7......................-0.3V to +6V
SDA Input Current.............................................................. 10mA
INT Input Current ................................................................10mA
Total V+ Current..................................................................50mA
Total GND Current ...........................................................100mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C over +70°C)..............667mW
16-Pin TQFN (derate 15.6mW/°C over +70°C) ..........1250mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V+ = +1.71V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage V+
1.71
5.50 V
Power-On Reset Voltage V
POR
1.6 V
Standby Current (Interface Idle) I
STB
SCL and SDA and other digital inputs at V+ 0.6 1.5 µA
Supply Current
(Interface Running)
I+ f
SCL
= 400kHz; other digital inputs at V+ 23 55 µA
V
+
< 1.8V 0.8 x V+
Input High Voltage
SDA, SCL, AD0, AD2, RST, I0–I7
V
IH
V
+
≥ 1.8V 0.7 x V+
V
V
+
< 1.8V 0.2 x V+
Input Low Voltage
SDA, SCL, AD0, AD2, RST, I0–I7
V
IL
V
+
≥ 1.8V 0.3 x V+
V
Input Leakage Current
SDA, SCL, AD0, AD2, RST, I0–I7
I
IH
, I
IL
SDA, SCL, AD0, AD2, RST, I0–I7 at V+ or
GND
-0.2 +0.2 µA
Input Capacitance
SDA, SCL, AD0, AD2, RST, I0–I7
10 pF
Output Low Voltage
SDA
V
OLSDA
I
SINK
= 6mA 250 mV
Output Low Voltage
INT
V
OLINT
I
SINK
= 5mA 100 250 mV
Port Input Pullup Resistor R
PU
25 40 55 kΩ
MAX7319
I
2
C Port Expander with Eight Inputs and
Maskable Transition Detection
_______________________________________________________________________________________ 3
PORT AND INTERRUPT INT TIMING CHARACTERISTICS
(V+ = +1.71V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Port Input Setup Time t
PSU
C
L
≤ 100pF 0 µs
Port Input Hold Time t
PH
C
L
≤ 100pF 4 µs
INT Input Data Valid Time t
IV
C
L
≤ 100pF 4 µs
INT Reset Delay Time from STOP t
IP
C
L
≤ 100pF 4 µs
INT Reset Delay Time from
Acknowledge
t
IR
C
L
≤ 100pF 4 µs
TIMING CHARACTERISTICS
(V+ = +1.71V to +5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Serial Clock Frequency f
SCL
400 kHz
Bus Free Time Between a STOP
and a START Condition
t
BUF
1.3 µs
Hold Time (Repeated) START
Condition
t
HD
,
STA
0.6 µs
Repeated START Condition
Setup Time
t
SU
,
STA
0.6 µs
STOP Condition Setup Time t
SU
,
STO
0.6 µs
Data Hold Time t
HD
,
DAT
(Note 2) 0.9 µs
Data Setup Time t
SU
,
DAT
100 ns
SCL Clock Low Period t
LOW
1.3 µs
SCL Clock High Period t
HIGH
0.7 µs
Rise Time of Both SDA and SCL
Signals, Receiving
t
R
(Notes 3, 4)
20 +
0.1C
b
300 ns
Fall Time of Both SDA and SCL
Signals, Receiving
t
F
(Notes 3, 4)
20 +
0.1C
b
300 ns
Fall Time of SDA, Transmitting t
F,TX
(Notes 3, 4)
20 +
0.1C
b
250 ns
Pulse Width of Spike Suppressed t
SP
(Note 5) 50 ns
Capacitive Load for Each Bus
Line
C
b
(Note 3) 400 pF
RST Pulse Width t
W
500 ns
RST Rising to START Condition
Setup Time
t
RST
1µs
Note 1: All parameters are tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2: A master device must provide a hold time of at least 300ns for the SDA signal (referred to V
IL
of the SCL signal) to bridge
the undefined region of SCL’s falling edge.
Note 3: Guaranteed by design.
Note 4: C
b
= total capacitance of one bus line in pF. t
R
and t
F
measured between 0.3 x V+ and 0.7 x V+, I
SINK
≤ 6mA.
Note 5: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX7319ATE+T

Mfr. #:
Buy MAX7319ATE+T
Manufacturer:
Maxim Integrated
Description:
Interface - I/O Expanders I2C Port Expander 8 Input
Lifecycle:
New from this manufacturer.
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