MAX6975 Maxim Integrated Products, MAX6975 Datasheet - Page 7

• Manufacturer Part Number: MAX6975
• Description: (MAX6974 / MAX6975) 24-Output PWM LED Drivers
• Manufacturer: Maxim Integrated Products

LOADI
CLKI
DIN
EXT. PNP
OUTPUT
MUX0
COUNTERS
CONTROL
R CALDAC
SYNC
PWM
8-BIT
_______________________________________________________________________________________
R7
I
SET
R6 R5 R4 R3 R2 R1 R0
R LED OUTPUTS
R LED DRIVERS
D
0/1
OE
LOAD
EN
R7–R0
Q1
SYNC DETECT
8
MUX0 PIXEL PWM NEW DATA LATCH
MUX0 PIXEL PWM OLD DATA LATCH
G CALDAC
5-BIT GLOBAL-INTENSITY PDM MODULATOR
8-BIT
14-BIT INDIVIDUAL PWM MODULATOR
336
336
336
336
336
24-Output PWM LED Drivers
G7 G6 G5 G4 G3 G2 G1 G0
I
SET
G LED OUTPUTS
G LED DRIVERS
336-BIT DATA SHIFT REGISTER
G7–G0
8
MAX6975
B CALDAC
for Message Boards
8-BIT
OE
LOAD
MUX1 PIXEL PWM NEW DATA LATCH
MUX1 PIXEL PWM OLD DATA LATCH
B7 B6 B5 B4 B3 B2 B1 B0
I
SET
MAX6975 Block Diagram
B LED DRIVERS
B LED OUTPUTS
B7–B0
8
5
24-BIT NEW HEADER
SHIFT REGISTER
336
336
336
5
CALIBRATION
DATA LATCH
DATA LATCH
INTENSITY
8
GLOBAL-
OUTPUTS
EXT. PNP
MUX1
8
EN
8
24
5
CLKO
DOUT
LOADO
7