Datasheet

MAX6956
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port LED Display Driver and I/O Expander
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.
Voltage (with Respect to GND)
V+ .............................................................................-0.3V to +6V
SCL, SDA, AD0, AD1................................................-0.3V to +6V
All Other Pins................................................-0.3V to (V+ + 0.3V)
P4–P31 Current ................................................................±30mA
GND Current .....................................................................800mA
Continuous Power Dissipation
28-Pin PDIP (derate 14.3mW/°C above T
A
= +70°C) 1143mW
28-Pin SSOP (derate 9.1mW/°C above T
A
= +70°C)...727mW
36-Pin SSOP (derate 11.8mW/°C above T
A
= +70°C) ...941mW
40-Pin TQFN (derate 26.3mW/°C above T
A
= +70°C) 2105mW
Operating Temperature Range
(T
MIN
to T
MAX
) ...............................................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature (reflow)
Lead(Pb)-free packages...............................................+260°C
Packages containing lead(Pb)......................................+240°C
ELECTRICAL CHARACTERISTICS
( Typical Operating Circuit , V+ = 2.5V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage V+ 2.5 5.5 V
T
A
= +25°C 5.5 8
T
A
= -40°C to +85°C 10
Shutdown Supply Current I
SHDN
All digital inputs at V+
or GND
T
A
= T
MIN
to T
MAX
11
µA
T
A
= +25°C 180 230
T
A
= -40°C to +85°C 250
Operating Supply Current I
GPOH
All ports programmed
as outputs high, no
load, all other inputs at
V+ or GND
T
A
= T
MIN
to T
MAX
270
µA
T
A
= +25°C 170 210
T
A
= -40°C to +85°C 230
Operating Supply Current I
GPOL
All ports programmed
as outputs low, no
load, all other inputs at
V+ or GND
T
A
= T
MIN
to T
MAX
240
µA
T
A
= +25°C 110 135
T
A
= -40°C to +85°C 140
Operating Supply Current I
LED
Al l p or ts p r og r am m ed
as LE D outp uts, al l LE D s
off, no l oad , al l other
i np uts at V + or GN D T
A
= T
MIN
to T
MAX
145
µA
INPUTS AND OUTPUTS
Logic-High Input Voltage
Port Inputs
V
IH
0.7
✕
V+
V
Logic-Low Input Voltage
Port Inputs
V
IL
0.3
✕
V+
V
Input Leakage Current I
IH
, I
IL
GPIO inputs without pullup,
V
PORT
= V+ to GND
-100 ±1 +100 nA
V+ = 2.5V 12 19 30
GPIO Input Internal Pullup to V+ I
PU
V+ = 5.5V 80 120 180
µA
Hysteresis Voltage GPIO Inputs ∆V
I
0.3 V
GPIO outputs, I
SOURCE
= 2mA, T
A
= -40°C to
+85°C
V+ -
0.7
Output High Voltage V
OH
GPIO outputs, I
SOURCE
= 1mA, T
A
= T
MIN
to
T
MAX
(Note 2)
V+ -
0.7
V
Port Sink Current I
OL
V
PORT
= 0.6V 2 10 18 mA
Output Short-Circuit Current I
OLSC
Port configured output low, shorted to V+ 2.75 11 20 mA