MAX6958AAEE Maxim Integrated Products, MAX6958AAEE Datasheet - Page 17

• Manufacturer Part Number: MAX6958AAEE
• Description: LED Drivers 2-Wire Interfaced, 3 V to 5.5V, 4-Digit,
• Manufacturer: Maxim Integrated Products

Specifications of MAX6958AAEE

• Number Of Digits: 4
• Number Of Segments: 36
• Low Level Output Current: 275000 uA
• High Level Output Current: 30000 uA
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Supply Current: 6700 uA
• Maximum Power Dissipation: 667 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: QSOP-16
• Minimum Operating Temperature: - 40 C

Determine the MAX6958/MAX6959 upper-limit power
dissipation (P
where:
V+ = supply voltage
I+ = operating supply current
DUTY = duty cycle set by intensity register
N = number of segments driven (worst case is nine)
V
I
P
Dissipation example:
MAX6959AAEE
MAX6958BAEE
MAX6958BAPE
MAX6959AAPE
MAX6959BAEE
MAX6959BAPE
SEG
LED
D
Ordering Information (continued)
I
V+ = 5.25V
P
(63/64
= power dissipation, in mW if currents are in mA
SEG
P
D
PART
= peak segment current
D
= LED forward voltage at I
9-Segment LED Display Drivers with Keyscan
= 5.25V (5.9mA) + (5.25V - 2.2V)
= (V+
= 23mA, N = 9, DUTY = 63/64, V
✕
23mA
D
✕
) with the following equation:
I+) + (V+ - V
-40°C to
-40°C to
-40°C to
-40°C to
-40°C to
-40°C to
RANGE
+125°C
+125°C
+125°C
+125°C
+125°C
+125°C
TEMP
Computing Power Dissipation
✕
______________________________________________________________________________________
9) = 0.652W
ADDRESS
2-Wire Interfaced, 3V to 5.5V, 4-Digit,
0111001
0111001
0111000
0111000
0111001
0111001
SLAVE
LED
) (DUTY
SEG
PIN-
PACKAGE
16 QSOP
16 DIP
16 QSOP
16 DIP
16 QSOP
16 DIP
✕
LED
I
SEG
= 2.2V,
✕
CODE
P16-1
P16-1
P16-1
N)
E 16- 1
E 16- 1
E 16- 1
PKG
For a 16-pin DIP package (T
from Absolute Maximum Ratings), the maximum
allowed ambient temperature T
Therefore, T
The MAX6958/MAX6959 operate from a single 3V to
5.5V power supply. Bypass V+ with a 0.1µF capacitor
to GND, as close to the device as possible. Bypass V+
with an additional 10µF capacitor if the MAX6958/
MAX6959 are not close to the board input’s bulk
decoupling capacitor.
TRANSISTOR COUNT: 17,340
PROCESS: CMOS
SDA
SCL
IRQ
T
CONFIGURATION
PWM INTENSITY
REFERENCE
J(MAX)
OSCILLATOR
CURRENT
MULTIPLEX
MULTIPLEX
REGISTERS
A
CONTROL
LOGIC
= +87.9°C.
2-WIRE SERIAL INTERFACE
= T
= T
A
A
+ (P
+ (0.652
Functional Diagram
D
JA
Chip Information
PORT CONTROL
✕
KEYSCAN AND
AND HEX ROM
DISPLAY RAM
A
= 1/0.0105 = +95.2°C/W
T
DRIVER
✕
JA
is given by:
LED
95.2°C/W)
) = +150°C
Power Supplies
4 LED DIGITS
PORTS AND
KEYSCAN
17