DS1856E-050 Maxim Integrated Products, DS1856E-050 Datasheet - Page 29

• Manufacturer Part Number: DS1856E-050
• Description: Digital Potentiometer ICs
• Manufacturer: Maxim Integrated Products

Specifications of DS1856E-050

• Number Of Pots: Dual
• Taps Per Pot: 256
• Resistance: 50 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (2-Wire)
• Operating Supply Voltage: 3.3 V, 5 V
• Supply Current: 2 mA
• Maximum Operating Temperature: + 95 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.85 V
• Package / Case: TSSOP-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Stop data transfer: A change in the state of the data
line from low to high while the clock line is high defines
the STOP condition.
Data valid: The state of the data line represents valid
data when, after a START condition, the data line is sta-
ble for the duration of the high period of the clock signal.
The data on the line can be changed during the low peri-
od of the clock signal. There is one clock pulse per bit of
data. Figures 5 and 6 detail how data transfer is accom-
Figure 5. 2-Wire Data Transfer Protocol
Figure 6. 2-Wire AC Characteristics
nally Calibrated Monitors and Password Protection
Dual, Temperature-Controlled Resistors with Inter-
SDA
SCL
SDA
SCL
CONDITION
START
STOP
t
BUF
START
MSB
1
t
HD:STA
2
t
SLAVE ADDRESS
LOW
6
____________________________________________________________________
t
R
t
HD:DAT
7
DIRECTION
t
F
R/W
BIT
8
t
HIGH
SIGNAL FROM RECEIVER
ACKNOWLEDGEMENT
t
SU:DAT
ACK
9
plished on the 2-wire bus. Depending on the state of the
R/W bit, two types of data transfer are possible.
Each data transfer is initiated with a START condition
and terminated with a STOP condition. The number of
data bytes transferred between START and STOP con-
ditions is not limited and is determined by the master
device. The information is transferred byte-wise and
each receiver acknowledges with a ninth bit.
REPEATED
START
1
t
SU:STA
2
REPEATED IF MORE BYTES
t
HD:STA
ARE TRANSFERRED
3–7
SIGNAL FROM RECEIVER
ACKNOWLEDGEMENT
8
ACK
9
t
SP
OR REPEATED
CONDITION
CONDITION
START
STOP
t
SU:STO
29