19-0836; Rev 1; 8/10
KIT
ATION
EVALU
E
BL
AVAILA
SMBus/I
2
C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
General Description
The MAX7306/MAX7307 I
2
C-/SMBus
™
-compatible, seri-
al-interfaced peripherals feature four level-translating
I/Os and operate from a 1.62V to 3.6V power supply.
The MAX7307 features a port supply (V
LA
) that allows
level translation on I/O ports to operate from a separate
power supply from 1.4V to 5.5V. The MAX7306 features
an address select input (AD0) to allow up to four unique
slave addresses.
The MAX7306/MAX7307 ports P2, P3, and P4 can be
configured as inputs, push-pull outputs, and open-drain
outputs. Port P1 can be configured as a general-pur-
pose input, open-drain output, or an open-drain
INT
out-
put. Ports P2 and P3 can be configured as OSCIN and
OSCOUT, respectively. The MAX7306/MAX7307 include
an internal oscillator for PWM, blink, and key debounce,
or to cascade multiple MAX7306/MAX7307s. The exter-
nal clock can be used to set a specific PWM and blink
timing. The
RST
input asynchronously clears the 2-wire
interface and terminates a bus lockup involving the
MAX7306/MAX7307.
All ports configured as output feature 33-step PWM,
allowing any output to be set from fully off, 1/32 to 31/32
duty cycle, to fully on. All output ports also feature LED
blink control, allowing blink periods of 1/8 second, 1/4
second, 1/2 second, 1, 2, 4, or 8 seconds. Any port can
blink during this period with a 1/16 to 15/16 duty cycle.
The MAX7306/MAX7307 are specified over the -40°C to
+125°C temperature range and are available in 10-pin
µDFN (2mm x 2mm) and 10-pin µMAX
®
packages.
Features
♦
1.4V to 5.5V I/O Level Translation Port Supply (V
LA
)
♦
1.62V to 3.6V Power Supply
♦
Four Individually Configurable GPIO Ports
P1 = Open-Drain I/O
P2, P3, P4 = Push-Pull or Open-Drain I/O
♦
Individual 33-Step PWM Intensity Control
♦
Blink Controls with 15 Steps on Outputs
♦
1kHz PWM Period Provides Flicker-Free LED
Intensity Control
♦
25mA (max) Port Output Sink Current (100mA
max Ground Current)
♦
Inputs Overvoltage Protected Up to 5.5V (V
LA
)
♦
Transition Detection with Optional Interrupt Output
♦
Optional Input Debouncing
♦
RST
Input Clears Serial Interface, Can Restore
Power-Up Default State, and Synchronizes Blink
Timing
♦
Oscillator Input and Output Enables Cascading
Multiple Devices
♦
Low 0.75µA (typ) Standby Current
MAX7306/MAX7307
Ordering Information
PART
TOP MARK
PIN-PACKAGE
10 µDFN (2mm x 2mm)
MAX7306ALB+
AAL
Note:
All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
Applications
Cell Phones
System I/O Ports
LCD/Keypad Backlights
LED Status Indicators
SMBus is a trademark of Intel Corp.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
+1.8V
+4.5V
+2.5V
V
DD
μC
SDA
SCL
RST
INT
SDA
V
LA
μC
SDA
V
DD
SDA
MAX7307
SCL
RST
P1/INT
P2/OSCIN
P3/OSCOUT
P4
SCL
RST
INT
SCL
RST
P1/INT
MAX7306
P2/OSCIN
P3/OSCOUT
P4
GND
AD0
GND
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
SMBus/I
2
C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
MAX7306/MAX7307
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
DD
..........................................................................-0.3V to +4V
V
LA
, SCL, SDA, AD0, and
RST.................................-0.3V
to +6V
P1/INT, P2/OSCIN, P3/OSCOUT, and P4
MAX7306 ................................................-0.3V to (V
DD
+ 0.3V)
MAX7307.................................................-0.3V to (V
LA
+ 0.3V)
P1/INT, P2/OSCIN, P3/OSCOUT, and P4 Sink Current ......25mA
P2/OSCIN, P3/OSCOUT, and P4 Source Current ..............10mA
SDA Sink Current ...............................................................10mA
V
DD
Current .......................................................................10mA
V
LA
Current (MAX7307) ......................................................30mA
GND Current ....................................................................100mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µDFN (derate 5.0mW/°C over +70°C) ..............402mW
10-Pin µMAX (derate 10.3mW/°C over +70°C) ............825mW
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
Soldering Temperature (reflow) .......................................+260°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 (MAX7306)
(V
DD
= 1.62V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
Operating Supply Voltage
Power-On Reset Voltage
Power-On Reset Hysteresis
SYMBOL
V
DD
V
POR
V
PORHYST
Internal oscillator disabled; SCL,
SDA, digital inputs at V
DD
or
GND; P1–P4 (as inputs) at V
DD
or
GND
Internal oscillator enabled; SCL,
SDA, digital inputs at V
DD
or
GND; P1–P4 (as inputs) at V
DD
or
GND
f
SCL
= 400kHz; other digital inputs
at V
DD
or GND
0.7 x V
DD
0.3 x V
DD
0.7 x V
DD
0.3 x V
DD
V
DD
or GND
V
DD
or GND
V
DD
= 1.62V, I
SINK
= 3mA
Output Low Voltage P1–P4
V
OL
V
DD
= 2.5V, I
SINK
= 16mA
V
DD
= 3.3V, I
SINK
= 20mA
V
DD
= 1.62V, I
SOURCE
= 0.5mA
Output High Voltage P2, P3, and P4
Output Low Voltage SDA
V
OH
V
OLSDA
V
DD
≥
2.5V, I
SOURCE
= 5mA
V
DD
≥
3.3V, I
SOURCE
= 8mA
I
SINK
= 6mA
1.55
V
DD
- 0.3
V
DD
- 0.4
-1
-1
8
0.06
0.19
0.2
1.6
2.3
3.1
0.3
V
V
0.11
0.4
0.4
V
+1
+1
V
DD
rising
CONDITIONS
MIN
1.62
1.0
10
1.3
131
TYP
MAX
3.60
1.6
300
UNITS
V
V
mV
I
STB
Standby Current (Interface Idle)
I
OSC
0.75
2
µA
14
25
Supply Current (Interface Running)
Input High Voltage SDA, SCL, AD0
Input Low Voltage SDA, SCL, AD0
Input High Voltage
RST,
P1–P4
Input Low Voltage
RST,
P1–P4
Input Leakage Current SDA, SCL, AD0
Input Leakage Current
RST,
P1–P4
Input Capacitance SDA, SCL, AD0, P1–P4
I
SUP
V
IH
V
IL
V
IHP
V
ILP
I
IH
, I
IL
I
IHP
, I
ILP
33
40
µA
V
V
V
V
µA
µA
pF
2
_______________________________________________________________________________________
SMBus/I
2
C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
ELECTRICAL CHARACTERISTICS (MAX7307)
(V
DD
= 1.62V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 3.3V, V
LA
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
Operating Supply Voltage
Port Logic Supply Voltage
Power-On Reset Voltage
Power-On Reset Hysteresis
SYMBOL
V
DD
V
LA
V
POR
V
PORHYST
I
STB
Standby Current (Interface Idle)
I
OSC
Internal oscillator disabled; SCL,
SDA, digital inputs at V
DD
or GND;
P1–P4 (as inputs) at V
LA
or GND
Internal oscillator enabled; SCL,
SDA, digital inputs at V
DD
or GND;
P1–P4 (as inputs) at V
LA
or GND
f
SCL
= 400kHz; other digital
inputs at V
LA
or GND
Port (configured as inputs) at V
LA
or GND
0.7 x V
DD
0.3 x V
DD
Input is V
LA
referred
Input is V
DD
referred
Input is V
LA
referred
Input is V
DD
referred
V
DD
or GND
V
LA
or GND
-1
-1
8
V
DD
= 1.62V, I
SINK
= 3mA
Output Low Voltage P1–P4
V
OL
V
DD
= 2.5V, I
SINK
= 16mA
V
DD
= 3.3V, I
SINK
= 20mA
V
LA
= 1.62V, I
SOURCE
= 0.5mA
Output High Voltage P2, P3, P4
Output Low Voltage SDA
V
OH
V
OLSDA
V
LA
= 2.5V, I
SOURCE
= 5mA
V
LA
= 3.3V, I
SOURCE
= 8mA
I
SINK
= 6mA
1.3
V
LA
- 0.3
V
LA
- 0.4
0.06
0.19
0.2
1.4
2.3
3.1
0.3
V
V
0.7 x V
LA
0.7 x V
DD
0.3 x V
LA
0.3 x V
DD
+1
+1
0.11
0.11
0.4
0.4
V
V
DD
rising
CONDITIONS
MIN
1.62
1.40
1.0
10
1.3
131
0.75
TYP
MAX
3.60
5.50
1.6
300
2
µA
14
25
UNITS
V
V
V
V
MAX7306/MAX7307
Supply Current (Interface Running)
Port Supply Current (V
LA
)
Input High Voltage SDA, SCL,
RST
Input Low Voltage SDA, SCL,
RST
Input High Voltage P1–P4
Input Low Voltage P1–P4
Input Leakage Current SDA, SCL, AD0,
RST
Input Leakage Current P1–P4
Input Capacitance SDA, SCL, AD0,
RST,
P1–P4
I
SUP
I
VLA
V
IH
V
IL
V
IHPA
V
ILPA
I
IH
, I
IL
I
IHP
, I
ILP
33
0.05
40
5
µA
µA
V
V
V
V
µA
µA
pF
_______________________________________________________________________________________
3
SMBus/I
2
C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
MAX7306/MAX7307
PORT, INTERRUPT (INT), AND RESET (RST) TIMING CHARACTERISTICS
(V
DD
= 1.62V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 3.3V, V
LA
= 3.3V (MAX7307 only), T
A
=
+25°C.) (Note 1) (See Figures 14, 15, and 16)
PARAMETER
Oscillator Frequency
Port Output Data Valid High Time
Port Output Data Valid Low Time (Internal or
External Oscillator Running)
Port Output Data Valid Low Time (Oscillator Not
Running)
Port Input Setup Time
Port Input Hold Time
INT
Input Data Valid Time
INT
Reset Delay Time from Acknowledge
RST
Pulse Width
RST
Rising to START Condition Setup Time
SYMBOL
f
CLK
t
PPVH
t
PPVL1
t
PPVL2
t
PSU
t
PH
t
IV
t
IR
t
W
t
RST
CONDITIONS
f
CLK
= internal oscillator
f
CLK
= external input
C
L
≤
100pF
C
L
≤
100pF (Note 2)
C
L
≤
100pF
C
L
= 100pF
C
L
= 100pF
C
L
= 100pF
C
L
= 100pF
500
900
0
4
4
4
40
MIN
TYP
32
1
4
1 / f
CLK
MAX
UNITS
kHz
MHz
µs
µs
µs
µs
µs
µs
µs
ns
ns
TIMING CHARACTERISTICS
(V
DD
= 1.62V to 3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 3.3V, V
LA
= 3.3V (MAX7307 only), T
A
=
+25°C.) (Note 1) (See Figure 8)
PARAMETER
Serial-Clock Frequency
Bus Timeout
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
SYMBOL
f
SCL
t
TIMEOUT
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
(Notes 2, 4)
(Notes 2, 4)
(Note 4)
(Note 5)
(Note 2)
(Note 3)
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
31
MAX
400
UNITS
kHz
ms
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
ns
pF
Note 1:
All parameters are tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2:
Guaranteed by design.
Note 3:
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 4:
C
b
= total capacitance of one bus line in pF. t
R
and t
F
are measured between 0.3 x V
DD
and 0.7 x V
DD
.
Note 5:
Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
4
_______________________________________________________________________________________
SMBus/I
2
C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
Typical Operating Characteristics
(V
DD
= 3.3V, V
LA
= 3.3V, and T
A
= +25°C, unless otherwise noted.) (MAX7307)
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX7306/7 toc01
MAX7306/MAX7307
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX7306/7 toc02
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE
f
SCL
= 400kHz
QUIESCENT SUPPLY CURRENT (μA)
35.5
35.0
34.5
34.0
33.5
33.0
MAX7306/7 toc03
0.70
INTERNAL OSCILLATOR OFF
QUIESCENT SUPPLY CURRENT (μA)
0.65
0.60
0.55
0.50
0.45
0.40
14.0
INTERNAL OSCILLATOR ON
QUIESCENT SUPPLY CURRENT (μA)
13.5
13.0
12.5
12.0
11.5
11.0
36.0
-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)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
PORT OPEN-DRAIN OUTPUT LOW VOLTAGE
vs. SINK CURRENT
MAX7306/7 toc04
PUSH-PULL OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX7306/7 toc05
INTERNAL OSCILLATOR
vs. TEMPERATURE
MAX7306/7 toc06
0.35
0.30
OUTPUT-VOLTAGE LOW (V)
0.25
0.20
0.15
0.10
0.05
0
0
5
10
15
SINK CURRENT (mA)
20
-40°C
+25°C
+125°C
3.3
-40°C
3.2
OUTPUT-VOLTAGE HIGH (V)
3.1
3.0
2.9
2.8
2.7
+125°C
+25°C
34.0
33.5
FREQUENCY (kHz)
33.0
32.5
32.0
31.5
31.0
25
0
3
6
9
12
SOURCE CURRENT (mA)
15
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
STAGGERED PWM OUTPUT
MAX7306/7 toc07
PUSH-PULL OUTPUT RISE TIME
MAX7306/7 toc08
P1
C
L
= 10pF
P2
2.00V/div
P3
2V/div
C
L
= 100pF
P4
400μs/div
20ns/div
_______________________________________________________________________________________
5
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