Datasheet

MAX6950/MAX6951
Serially Interfaced, +2.7V to +5.5V,
5- and 8-Digit LED Display Drivers
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
All Other Pins................................................-0.3V to (V+ + 0.3V)
DIG1–DIG8 Sink Current.................................................. 440mA
SEG1–SEG9 Source Current.............................................. 55mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.34mW/°C above +70°C)........667mW
Operating Temperature Ranges (T
MIN
to T
MAX
)
MAX695_CEE....................................................0°C to +70°C
MAX695_EEE.................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(Typical operating circuit, V+ = +3.0V 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+ 2.7 5.5 V
Overtemperature 75
Shutdown Supply Current I
SHDN
S hutd ow n m od e, al l d i g i tal
i np uts at V + or GN D
T
A
= +25
o
C 62 160
µA
Operating Supply Current I+
All segments on, all digits scanned,
intensity set to full, internal oscillator,
no display load connected
10 15 mA
OSC = RC oscillator 1 8
Master Clock Frequency (OSC
Internal Oscillator)
f
OSC
OSC = RC oscillator, R
SET
= 56kΩ,
C
SET
= 27pF
4
MHz
Master Clock Frequency (OSC
External Clock)
f
OSC
OSC overdriven externally 1 8 MHz
Display Scan Rate (OSC
External Clock)
f
SCAN
Eight digits scanned, OSC = overdriven
externally
155 1250 Hz
Display Scan Rate (OSC Internal
Oscillator)
f
SCAN
Eight digits scanned, OSC = RC oscillator 155 1250 Hz
Display Scan Rate (OSC Internal
Oscillator)
f
SCAN
Eight digits scanned, OSC = RC oscillator,
R
SET
= 56kΩ, C
SET
= 27pF
625 Hz
OSC Internal/External Detection
Threshold
V
OSC
1.7 V
Dead Clock Protection
Frequency
f
OSC
75.5 kHz
OSC High Time (OSC External
Clock)
t
CH
50 ns
OSC Low Time (OSC External
Clock)
t
CL
50 ns