MAX5419LETA+T Maxim Integrated Products, MAX5419LETA+T Datasheet - Page 10

• Manufacturer Part Number: MAX5419LETA+T
• Description: IC POT DGTL 256-TAP I2C 8-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX5419LETA+T

• Package / Case: 8-TDFN Exposed Pad
• Mounting Type: Surface Mount
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Temperature Coefficient: 35 ppm/°C Typical
• Interface: I²C, 2-Wire Serial
• Resistance In Ohms: 200K
• Number Of Circuits: 1
• Memory Type: Non-Volatile
• Taps: 256
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

256-Tap, Nonvolatile, I
Digital Potentiometers
Figure 7. Command Byte Received
Figure 8. Command and Single Data Byte Received
A write to the MAX5417/MAX5418/MAX5419 consists of
the transmission of the device’s slave address with the
8th bit set to zero, followed by at least 1 byte of infor-
mation. The 1st byte of information is the command
byte. The bytes received after the command byte are
the data bytes. The 1st data byte goes into the internal
register of the MAX5417/MAX5418/MAX5419 as select-
ed by the command byte (Figure 8).
Use the command byte to select the source and desti-
nation of the wiper data (nonvolatile or volatile memory
registers) and swap data between nonvolatile and
volatile memory registers (see Table 2).
10
S
______________________________________________________________________________________
HOW CONTROL BYTE AND DATA BYTE MAP INTO
S
MAX5417/MAX5418/MAX5419 REGISTERS
SLAVE ADDRESS
CONTROL BYTE IS STORED ON RECEIPT OF STOP CONDITION
MAX5417/MAX5418/MAX5419
Message Format for Writing
ACKNOWLEDGE FROM
SLAVE ADDRESS
NOP/W
MAX5417/MAX5418/MAX5419
0
ACKNOWLEDGE FROM
A
Command Byte
NOP/W
D15 D14 D13 D12 D11 D10
0
MAX5417/MAX5418/MAX5419
CONTROL BYTE
A
2
ACKNOWLEDGE FROM
C-Interface,
D15
VREG: The data byte writes to the volatile memory reg-
ister and the wiper position updates with the data in the
volatile memory register.
NVREG: The data byte writes to the nonvolatile memory
register. The wiper position is unchanged.
NVxREG: Data transfers from the nonvolatile memory
register to the volatile memory register (wiper position
updates).
VxNVREG: Data transfers from the volatile memory reg-
ister into the nonvolatile memory register.
D14
D9
D13
D8
CONTROL BYTE
D12
A
D7
MAX5417/MAX5418/MAX5419
D11
D6
ACKNOWLEDGE FROM
D10
D5
MAX5417/MAX5418/MAX5419
DATA BYTE
D9
D4
1 BYTE
ACKNOWLEDGE FROM
Command Descriptions
D3
D8
D2
A
D1
P
D0
A
P