Total V+ Current .................................................................50mA
Total GND Current ...........................................................100mA
Continuous Power Dissipation (TA = +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
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.
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, TA = +25°C.) (Note 1)
PARAMETER
Operating Supply Voltage
Power-On Reset Voltage
Standby Current (Interface Idle)
Supply Current
(Interface Running)
Input High Voltage
SDA, SCL, AD0, AD2,
RST,
I0–I7
Input Low Voltage
SDA, SCL, AD0, AD2,
RST,
I0–I7
Input Leakage Current
SDA, SCL, AD0, AD2,
RST,
I0–I7
Input Capacitance
SDA, SCL, AD0, AD2,
RST,
I0–I7
Output Low Voltage
SDA
Output Low Voltage
INT
Port Input Pullup Resistor
V
OLSDA
V
OLINT
R
PU
I
SINK
= 6mA
I
SINK
= 5mA
25
100
40
SYMBOL
V+
V
POR
I
STB
I
+
V
IH
V
IL
I
IH
, I
IL
SCL and SDA and other digital inputs at V+
f
SCL
= 400kHz; other digital inputs at V+
V+ < 1.8V
V+
≥ 1.8V
V+ < 1.8V
V+
≥ 1.8V
SDA, SCL, AD0, AD2, RST, I0–I7 at V+ or
GND
-0.2
10
250
250
55
0.8 x V+
0.7 x V+
0.2 x V+
0.3 x V+
+0.2
0.6
23
CONDITIONS
MIN
1.71
TYP
MAX
5.50
1.6
1.5
55
UNITS
V
V
µA
µA
V
V
µA
pF
mV
mV
kW
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Maxim Integrated
│
2
MAX7319
I
2
C Port Expander with Eight Inputs
and Maskable Transition Detection
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
Port Input Hold Time
INT
Input Data Valid Time
INT
Reset Delay Time from STOP
INT
Reset Delay Time from
Acknowledge
t
PSU
t
PH
t
IV
t
IP
t
IR
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
C
L
≤ 100pF
0
4
4
4
4
µs
µs
µs
µs
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
Serial-Clock Frequency
Bus Free Time Between a STOP
and a START Condition
Hold Time (Repeated) START
Condition
Repeated START Condition
Setup Time
STOP Condition Setup Time
Data Hold Time
Data Setup Time
SCL Clock Low Period
SCL Clock High Period
Rise Time of Both SDA and SCL
Signals, Receiving
Fall Time of Both SDA and SCL
Signals, Receiving
Fall Time of SDA, Transmitting
Pulse Width of Spike Suppressed
Capacitive Load for Each Bus Line
RST
Pulse Width
RST
Rising to START Condition
Setup Time
SYMBOL
f
SCL
t
BUF
t
HD, STA
t
SU, STA
t
SU, STO
t
HD, DAT
t
SU, DAT
t
LOW
t
HIGH
t
R
t
F
t
F,TX
t
SP
C
b
t
W
t
RST
(Notes 3, 4)
(Notes 3, 4)
(Notes 3, 4)
(Note 5)
(Note 3)
500
1
(Note 2)
100
1.3
0.7
20 +
0.1C
b
20 +
0.1C
b
20 +
0.1C
b
50
400
300
300
250
1.3
0.6
0.6
0.6
0.9
CONDITIONS
MIN
TYP
MAX
400
UNITS
kHz
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
ns
pF
ns
µs
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.
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Maxim Integrated
│
3
MAX7319
I
2
C Port Expander with Eight Inputs
and Maskable Transition Detection
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
STANDBY CURRENT vs. TEMPERATURE
1.8
STANDBY CURRENT (µA)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V+ = +1.71V
V+ = +2.5V
V+ = +3.3V
V+ = +5.0V
f
SCL
= 0kHz
MAX7319 toc01
f
SCL
= 400kHz
V+ = +5.0V
50
SUPPLY CURRENT (µA)
40
30
20
10
0
V+ = +1.71V
V+ = +3.3V
V+ = +2.5V
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
Pin Description
PIN
QSOP
1, 3
2
4–7, 9–12
8
13
14
15
16
—
TQFN
15, 1
16
2–5, 7–10
6
11
12
13
14
EP
NAME
AD0, AD2
RST
I0–I7
GND
INT
SCL
SDA
V+
EP
FUNCTION
Address Inputs. Select device slave address with AD0 and AD2. Connect AD0 and AD2
to either GND, V+, SCL, or SDA to give four logic combinations (see Table 3).
Reset Input, Active Low. Drive
RST
low to clear the 2-wire interface.
Input Ports. I0 to I7 are CMOS logic inputs protected to +6V.
Ground
Interrupt Output, Active Low.
INT
is an open-drain output rated at +6V.
I
2
C-Compatible Serial Clock Input
I
2
C-Compatible Serial Data I/O
Positive Supply Voltage. Bypass V+ to GND with a ceramic capacitor of at least 0.047µF.
Exposed Pad. Connect exposed pad to GND.
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Maxim Integrated
│
4
MAX7319 toc02
2.0
60
SUPPLY CURRENT vs. TEMPERATURE
MAX7319
I
2
C Port Expander with Eight Inputs
and Maskable Transition Detection
Functional Overview
Detailed Description
MAX7319–MAX7329 Family Comparison
The MAX7319–MAX7323 family consists of five
pin-compatible, eight-port expanders. Each version is
optimized for different applications. The MAX7328 and
MAX7329 are second sources to the PCF8574 and
PCF8574A.
The MAX7324–MAX7327 family consists of four
pin-compatible, 16-port expanders that integrate the
functions of the MAX7320 and one of either the MAX7319,
MAX7321, MAX7322, or MAX7323.
The MAX7319 is a general-purpose port expander,
operating from a +1.71V to +5.5V supply that provides
eight CMOS input ports that are overvoltage protected to
+6V independent of supply voltage.
The MAX7319 is set to one of 16 I
2
C slave addresses
(0x60 to 0x6F) using the address-select inputs AD2 and
AD0, and is accessed over an I
2
C serial interface. The
RST
input clears the serial interface in case of a hung
bus, terminating any serial transaction to or from the
MAX7319.
The input ports offer latching transition detection
functionality. All input ports are continuously monitored
Table 1. MAX7319–MAX7329 Family Comparison
PART
I
2
C
INPUT
SLAVE
INPUTS INTERRUPT
ADDRESS
MASK
OPEN-
DRAIN
OUTPUTS
PUSH-
PULL
OUTPUTS
APPLICATION
8-PORT EXPANDERS
Input-only versions:
Eight input ports with programmable latching
transition detection interrupt and selectable pullups.
Offers maximum versatility for automatic input
monitoring. An interrupt mask selects which inputs
cause an interrupt on transitions, and transition flags
identify which inputs have changed (even
momentarily) since the ports were last read.
Output-only versions:
Eight push-pull outputs with selectable power-up
default levels
Push-pull outputs offer faster rise time than open-
drain outputs, and require no pullup resistors.
I/O versions:
Eight open-drain I/O ports with latching transition
detection interrupt and selectable pullups.
Open-drain outputs can level shift the logic-high
State to a higher or lower voltage than V+ using
external pullup resistors. Any port can be used as an
input by setting the open-drain output to logic-high.
Transition flags identify which inputs have changed
(even momentarily) since the ports were last read.
Four input-only, four output-only versions:
Four input ports with programmable latching
transition detection interrupt and selectable pullups.
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