MAX6964AEG+T Maxim Integrated Products, MAX6964AEG+T Datasheet - Page 7

• Manufacturer Part Number: MAX6964AEG+T
• Description: IC LED DRIVER LINEAR 24-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Linear (I²C Interface)r

Specifications of MAX6964AEG+T

• Topology: Open Drain, PWM
• Number Of Outputs: 17
• Internal Driver: Yes
• Type - Primary: Backlight, LED Blinker
• Type - Secondary: RGB, White LED
• Frequency: 400kHz
• Voltage - Supply: 2 V ~ 3.6 V
• Voltage - Output: 7V
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 50mA
• Internal Switch(s): Yes
• Number Of Segments: 12
• Low Level Output Current: 50 mA
• Operating Supply Voltage: 2 V to 3.6 V
• Maximum Supply Current: 122.1 uA
• Maximum Power Dissipation: 761 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / Rohs Status: Details

The MAX6964 includes 2 register bytes, which are
available as general-user RAM (Table 2). These bytes
are reset to the value 0xFF on power-up and when the
RST input is taken low (Table 3).
When the serial interface is idle and the PWM intensity
control is unused, the MAX6964 automatically enters
standby mode. If the PWM intensity control is used, the
operating current is slightly higher because the internal
PWM oscillator is running. When the serial interface is
active, the operating current also increases because
the MAX6964, like all I
transmission.
Figure 3. Start and Stop Conditions
Figure 4. Bit Transfer
Figure 5. Acknowledge
Figure 6. Slave Address
TRANSMITTER
SDA
SCL
SDA
SCL
RECEIVER
CONDITION
SDA BY
SDA BY
START
SDA
SCL
SCL
S
Intensity Control and Hot-Insertion Protection
CONDITION
START
DATA LINE STABLE;
S
DATA VALID
MSB
A6
_______________________________________________________________________________________
1
CHANGE OF DATA
2
C slaves, has to monitor every
ALLOWED
1
2
FOR ACKNOWLEDGE
0
CLOCK PULSE
Standby Mode
8
17-Output LED Driver/GPO with
User RAM
CONDITION
0
STOP
9
P
A2
The MAX6964 operates as a slave that sends and
receives data through an I
face. The interface uses a serial data line (SDA) and a
serial clock line (SCL) to achieve bidirectional commu-
nication between master(s) and slave(s). A master (typ-
ically a microcontroller) initiates all data transfers to and
from the MAX6964 and generates the SCL clock that
synchronizes the data transfer (Figure 2).
The MAX6964 SDA line operates as both an input and
an open-drain output. A pullup resistor, typically 4.7kΩ,
is required on SDA. The MAX6964 SCL line operates
only as an input. A pullup resistor, typically 4.7kΩ, is
required on SCL if there are multiple masters on the 2-
wire interface, or if the master in a single-master system
has an open-drain SCL output.
Each transmission consists of a START condition
(Figure 3) sent by a master, followed by the MAX6964
7-bit slave address plus R/W bit, a register address
byte, 1 or more data bytes, and finally a STOP condi-
tion (Figure 3).
Both SCL and SDA remain high when the interface is
not busy. A master signals the beginning of a transmis-
sion with a START (S) condition by transitioning SDA
from high to low while SCL is high. When the master
has finished communicating with the slave, it issues a
STOP (P) condition by transitioning SDA from low to
high while SCL is high. The bus is then free for another
transmission (Figure 3).
One data bit is transferred during each clock pulse.
The data on SDA must remain stable while SCL is high
(Figure 4).
The acknowledge bit is a clocked 9th bit that the recipi-
ent uses to handshake receipt of each byte of data
(Figure 5). Thus, each byte transferred effectively
requires 9 bits. The master generates the 9th clock
pulse, and the recipient pulls down SDA during the
acknowledge clock pulse so the SDA line is stable low
0
LSB
0
2
Start and Stop Conditions
C-compatible 2-wire inter-
R/W
Serial Interface
Serial Addressing
ACK
Acknowledge
Bit Transfer
7