CAT5241
Quad Digital
Potentiometer (POT)
with 64 Taps
and I2C Interface
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Description
The CAT5241 is four Digital POTs integrated with control logic and
16 bytes of NVRAM memory. Each digital POT consists of a series of
63 resistive elements connected between two externally accessible end
points. The tap points between each resistive element are connected to
the wiper outputs with CMOS switches. A separate 6-bit control
register (WCR) independently controls the wiper tap switches for each
digital POT. Associated with each wiper control register are four 6-bit
non-volatile memory data registers (DR) used for storing up to four
wiper settings. Writing to the wiper control register or any of the
non-volatile data registers is via a I2C serial bus. On power-up, the
contents of the first data register (DR0) for each of the four
potentiometers is automatically loaded into its respective wiper
control register (WCR).
The CAT5241 can be used as a potentiometer or as a two terminal,
variable resistor. It is intended for circuit level or system level
adjustments in a wide variety of applications.
Four Linear-taper Digital Potentiometers
64 Resistor Taps per Potentiometer
End to End Resistance 2.5 kW, 10 kW, 50 kW or 100 kW
Potentiometer Control and Memory Access via I2C Interface
Low Wiper Resistance, Typically 80 W
Nonvolatile Memory Storage for up to Four Wiper Settings for Each
Potentiometer
Automatic Recall of Saved Wiper Settings at Power Up
2.5 to 6.0 Volt Operation
Standby Current less than 1 mA
1,000,000 Nonvolatile WRITE Cycles
100 Year Nonvolatile Memory Data Retention
20-lead SOIC and TSSOP Packages
Industrial Temperature Range
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Semiconductor Components Industries, LLC, 2013
July, 2013 − Rev. 20
1
SOIC−20
W SUFFIX
CASE 751BJ
PIN CONNECTIONS
RW0
VCC
1
RL0
RW3
RH0
RL3
A0
RH3
A2
A1
RW1
Features
TSSOP−20
Y SUFFIX
CASE 948AQ
RL1
CAT5241
A3
SCL
RH1
RW2
SDA
RL2
GND
RH2
SOIC−20 (W)
TSSOP−20 (Y)
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
Publication Order Number:
CAT5241/D
CAT5241
MARKING DIAGRAMS
(SOIC−20)
(TSSOP−20)
L3B
CAT5241WT
−RRYMXXXX
RLB
CAT5241YT
3YMXXX
L = Assembly Location
3 = Lead Finish − Matte−Tin
B = Product Revision (Fixed as “B”)
CAT5241W = Device Code
T = Temperature Range (I = Industrial)
− = Dash
RR = Resistance
25 = 2.5 KW
10 = 10 KW
50 = 50 KW
00 = 100 KW
Y = Production Year (Last Digit)
M = Production Month (1−9, O, N, D)
XXXX = Last Four Digits of Assembly Lot Number
R = Resistance
1 = 2.5 KW
2 = 10 KW
4 = 50 KW
5 = 100 KW
L = Assembly Location
B = Product Revision (Fixed as “B”)
CAT5241Y = Device Code
T = Temperature Range (I = Industrial)
3 = Lead Finish − Matte−Tin
Y = Production Year (Last Digit)
M = Production Month (1−9, O, N, D)
XXX = Last Three Digits of Assembly Lot Number
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CAT5241
RH0
SCL
RH2
RH3
WIPER
CONTROL
REGISTERS
I2C BUS
INTERFACE
SDA
RH1
RW0
RW1
RW2
A0
A1
A2
A3
NONVOLATILE
DATA
REGISTERS
CONTROL
LOGIC
RW3
RL0
RL1
RL2
RL3
Figure 1. Functional Diagram
SDA: Serial Data
Table 1. PIN DESCRIPTION
Pin (SOIC)
Name
1
RW0
Wiper Terminal for Potentiometer 0
2
RL0
Low Reference Terminal for
Potentiometer 0
3
RH0
High Reference Terminal for
Potentiometer 0
4
A0
Device Address, LSB
5
A2
Device Address
6
RW1
Wiper Terminal for Potentiometer 1
7
RL1
Low Reference Terminal for
Potentiometer 1
8
RH1
High Reference Terminal for
Potentiometer 1
The CAT5241 bidirectional serial data pin is used to
transfer data into and out of the device. The SDA pin is an
open drain output and can be wire-OR’d with the other open
drain or open collector outputs.
Function
A0, A1, A2, A3: Device Address Inputs
These inputs set the device address when addressing
multiple devices. A total of sixteen devices can be addressed
on a single bus. A match in the slave address must be made
with the address input in order to initiate communication
with the CAT5241.
RH, RL: Resistor End Points
The four sets of RH and RL pins are equivalent to the
terminal connections on a mechanical potentiometer.
9
SDA
Serial Data Input/Output
10
GND
Ground
11
RH2
High Reference Terminal for
Potentiometer 2
12
RL2
Low Reference Terminal for
Potentiometer 2
13
RW2
Wiper Terminal for Potentiometer 2
14
SCL
Bus Serial Clock
15
A3
Device Address
16
A1
Device Address
17
RH3
High Reference Terminal for
Potentiometer 3
18
RL3
Low Reference Terminal for
Potentiometer 3
19
RW3
Wiper Terminal for Potentiometer 3
20
VCC
Supply Voltage
RW: Wiper
The four RW pins are equivalent to the wiper terminal of
a mechanical potentiometer.
Device Operation
The CAT5241 is four resistor arrays integrated with I2C
serial interface logic, four 6-bit wiper control registers and
sixteen 6-bit, non-volatile memory data registers. Each
resistor array contains 63 separate resistive elements
connected in series. The physical ends of each array are
equivalent to the fixed terminals of a mechanical
potentiometer (RH and RL). RH and RL are symmetrical and
may be interchanged. The tap positions between and at the
ends of the series resistors are connected to the output wiper
terminals (RW) by a CMOS transistor switch. Only one tap
point for each potentiometer is connected to its wiper
terminal at a time and is determined by the value of the wiper
control register. Data can be read or written to the wiper
control registers or the non-volatile memory data registers
via the I2C bus. Additional instructions allow data to be
transferred between the wiper control registers and each
respective potentiometer’s non-volatile data registers. Also,
the device can be instructed to operate in an
“increment/decrement” mode.
Pin Descriptions
SCL: Serial Clock
The CAT5241 serial clock input pin is used to clock all
data transfers into or out of the device.
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CAT5241
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
Ratings
Units
Temperature Under Bias
−55 to +125
C
Storage Temperature Range
−65 to +150
C
−2.0 to +VCC +2.0
V
Voltage on any Pin with Respect to VSS (Notes 1, 2)
VCC with Respect to Ground
−2.0 to +7.0
V
Package Power Dissipation Capability (TA = 25C)
1.0
W
Lead Soldering Temperature (10 s)
300
C
Wiper Current
12
mA
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The minimum DC input voltage is −0.5 V. During transitions, inputs may undershoot to –2.0 V for periods of less than 20 ns. Maximum DC
voltage on output pins is VCC + 0.5 V, which may overshoot to VCC + 2.0 V for periods of less than 20 ns.
2. Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1 V to VCC + 1 V.
Table 3. RECOMMENDED OPERATING CONDITIONS
Parameter
Ratings
Units
VCC
+2.5 to +6.0
V
Operating Ambient Temperature (Industrial)
−40 to +85
C
Table 4. POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
RPOT
Potentiometer Resistance (−00)
100
kW
RPOT
Potentiometer Resistance (−50)
50
kW
RPOT
Potentiometer Resistance (−10)
10
kW
RPOT
Potentiometer Resistance (−25)
2.5
kW
Potentiometer Resistance Tolerance
20
%
1
%
25C, each pot
50
mW
6
mA
300
W
150
W
RPOT Matching
Power Rating
IW
Wiper Current
RW
Wiper Resistance
IW = 3 mA @ VCC = 3 V
RW
Wiper Resistance
IW = 3 mA @ VCC = 5 V
VTERM
VN
Voltage on any RH or RL Pin
Noise
VSS = 0 V
(Note 3)
Resolution
80
GND
VCC
TBD
nV/Hz
1.6
%
Absolute Linearity (Note 4)
RW(n)(actual)−R(n)(expected)
(Note 7)
1
LSB
(Note 6)
Relative Linearity (Note 5)
RW(n+1)−[RW(n)+LSB]
(Note 7)
0.2
LSB
(Note 6)
TCRPOT
Temperature Coefficient of RPOT
(Note 3)
TCRATIO
Ratiometric Temp. Coefficient
(Note 3)
CH/CL/CW
Potentiometer Capacitances
(Note 3)
10/10/25
pF
RPOT = 50 kW (Note 3)
0.4
MHz
fc
Frequency Response
ppm/C
300
20
ppm/C
3. This parameter is tested initially and after a design or process change that affects the parameter.
4. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
5. Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer.
It is a measure of the error in step size.
6. LSB = RTOT / 63 or (RH − RL) / 63, single pot
7. n = 0, 1, 2, ..., 63
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CAT5241
Table 5. D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
fSCL = 400 kHz
1
mA
VIN = GND or VCC;
SDA = GND;
RWX = GND (Note 8)
1
mA
VIN = GND to VCC
10
mA
VOUT = GND to VCC
10
mA
ICC
Power Supply Current
ISB
Standby Current (VCC = 5.0 V)
ILI
Input Leakage Current
ILO
Output Leakage Current
VIL
Input Low Voltage
−1
VCC x 0.3
V
VIH
Input High Voltage
VCC x 0.7
VCC + 1.0
V
0.4
V
VOL1
Output Low Voltage (VCC = 3.0 V)
IOL = 3 mA
8. All four wiper terminals RW0, RW1, RW2, and RW3 are tied to ground.
Table 6. CAPACITANCE (Note 9) (TA = 25C, f = 1.0 MHz, VCC = +5.0 V)
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
CI/O
Input/Output Capacitance (SDA)
VI/O = 0 V
8
pF
CIN
Input Capacitance (A0, A1, A2, A3, SCL)
VIN = 0 V
6
pF
Max
Units
Clock Frequency
400
kHz
Noise Suppression Time Constant at SCL, SDA Inputs
50
ns
SLC Low to SDA Data Out and ACK Out
0.9
ms
Table 7. A.C. CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol
fSCL
TI (Note 9)
tAA
tBUF (Note 9)
Parameter
Min
Typ
Time the Bus Must Be Free Before a New Transmission Can Start
1.2
ms
Start Condition Hold Time
0.6
ms
tLOW
Clock Low Period
1.2
ms
tHIGH
Clock High Period
0.6
ms
tSU:STA
Start Condition Setup Time (For a Repeated Start Condition)
0.6
ms
tHD:DAT
Data in Hold Time
0
ns
tSU:DAT
Data in Setup Time
100
ns
tHD:STA
tR (Note 9)
SDA and SCL Rise Time
0.3
ms
tF (Note 9)
SDA and SCL Fall Time
300
ns
tSU:STO
tDH
Stop Condition Setup Time
0.6
ms
Data Out Hold Time
50
ns
Table 8. POWER UP TIMING (Note 9) (Over recommended operating conditions unless otherwise stated.)
Parameter
Symbol
Min
Typ
Max
Units
tPUR
Power-up to Read Operation
1
ms
tPUW
Power-up to Write Operation
1
ms
Max
Units
5
ms
9. This parameter is tested initially and after a design or process change that affects the parameter.
Table 9. WRITE CYCLE LIMITS (Note 10) (Over recommended operating conditions unless otherwise stated.)
Symbol
tWR
Parameter
Min
Write Cycle Time
Typ
10. The write cycle is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the write
cycle, the bus interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave address.
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CAT5241
Table 10. RELIABILITY CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol
Parameter
Reference Test Method
Min
Typ
Max
Units
NEND (Note 11)
Endurance
MIL−STD−883, Test Method 1033
1,000,000
Cycles/Byte
TDR (Note 11)
Data Retention
MIL−STD−883, Test Method 1008
100
Years
VZAP (Note 11)
ESD Susceptibility
MIL−STD−883, Test Method 3015
2000
Volts
ILTH (Notes 11, 12)
Latch-Up
JEDEC Standard 17
100
mA
11. This parameter is tested initially and after a design or process change that affects the parameter.
12. tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.
tF
tHIGH
tLOW
tR
tLOW
SCL
tSU:STA
tHD:DAT
tHD:STA
tSU:STO
tSU:DAT
SDA IN
tBUF
tDH
tAA
SDA OUT
Figure 2. Bus Timing
SCL
8TH BIT
SDA
ACK
BYTE n
tWR
STOP
CONDITION
START
CONDITION
Figure 3. Write Cycle Timing
SDA
SCL
START BIT
STOP BIT
Figure 4. Start/Stop Timing
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ADDRESS
CAT5241
Serial Bus Protocol
The following defines the features of the I2C bus protocol:
1. Data transfer may be initiated only when the bus is
not busy.
2. During a data transfer, the data line must remain
stable whenever the clock line is high. Any
changes in the data line while the clock is high
will be interpreted as a START or STOP condition.
particular slave device it is requesting. The four most
significant bits of the 8-bit slave address are fixed as 0101
for the CAT5241 (see Figure 6). The next four significant
bits (A3, A2, A1, A0) are the device address bits and define
which device the Master is accessing. Up to sixteen devices
may be individually addressed by the system. Typically,
+5 V and ground are hard-wired to these pins to establish the
device’s address.
After the Master sends a START condition and the slave
address byte, the CAT5241 monitors the bus and responds
with an acknowledge (on the SDA line) when its address
matches the transmitted slave address.
The device controlling the transfer is a master, typically a
processor or controller, and the device being controlled is the
slave. The master will always initiate data transfers and
provide the clock for both transmit and receive operations.
Therefore, the CAT5241 will be considered a slave device
in all applications.
Acknowledge
After a successful data transfer, each receiving device is
required to generate an acknowledge. The Acknowledging
device pulls down the SDA line during the ninth clock cycle,
signaling that it received the 8 bits of data.
The CAT5241 responds with an acknowledge after
receiving a START condition and its slave address. If the
device has been selected along with a write operation, it
responds with an acknowledge after receiving each 8-bit
byte.
When the CAT5241 is in a READ mode it transmits 8 bits
of data, releases the SDA line, and monitors the line for an
acknowledge. Once it receives this acknowledge, the
CAT5241 will continue to transmit data. If no acknowledge
is sent by the Master, the device terminates data transmission
and waits for a STOP condition.
START Condition
The START Condition precedes all commands to the
device, and is defined as a HIGH to LOW transition of SDA
when SCL is HIGH. The CAT5241 monitors the SDA and
SCL lines and will not respond until this condition is met.
STOP Condition
A LOW to HIGH transition of SDA when SCL is HIGH
determines the STOP condition. All operations must end
with a STOP condition.
Device Addressing
The bus Master begins a transmission by sending a
START condition. The Master then sends the address of the
SCL FROM
MASTER
1
8
9
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
ACKNOWLEDGE
START
Figure 5. Acknowledge Timing
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CAT5241
Write Operation
Acknowledge Polling
In the Write mode, the Master device sends the START
condition and the slave address information to the Slave
device. After the Slave generates an acknowledge, the
Master sends the instruction byte that defines the requested
operation of CAT5241. The instruction byte consist of a
four-bit opcode followed by two register selection bits and
two pot selection bits. After receiving another acknowledge
from the Slave, the Master device transmits the data to be
written into the selected register. The CAT5241
acknowledges once more and the Master generates the
STOP condition, at which time if a non-volatile data register
is being selected, the device begins an internal programming
cycle to non-volatile memory. While this internal cycle is in
progress, the device will not respond to any request from the
Master device.
The disabling of the inputs can be used to take advantage
of the typical write cycle time. Once the stop condition is
issued to indicate the end of the host’s write operation, the
CAT5241 initiates the internal write cycle. ACK polling can
be initiated immediately. This involves issuing the start
condition followed by the slave address. If the CAT5241 is
still busy with the write operation, no ACK will be returned.
If the CAT5241 has completed the write operation, an ACK
will be returned and the host can then proceed with the next
instruction operation.
CAT5241
0
1
0
1
A3
A2
A1
A0
* A0, A1, A2 and A3 correspond to pin A0, A1, A2 and A3 of the device.
** A0, A1, A2 and A3 must compare to its corresponding hard wired input pins.
Figure 6. Slave Address Bits
SDA LINE
SLAVE
ADDRESS
Fixed
op code
BUS ACTIVITY:
MASTER
S
T
A
R
T
Variable
Pot/WCR
Address
Data Register
Address
INSTRUCTION
BYTE
S
T
O
P
DR WCR DATA
P
S
A
C
K
A
C
K
Figure 7. Write Timing
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A
C
K
CAT5241
Instructions and Register Description
Instruction Byte
The next byte sent to the CAT5241 contains the
instruction and register pointer information. The four most
significant bits used provide the instruction opcode I [3:0].
The P1 and P0 bits point to one of four Wiper Control
Registers. The least two significant bits, R1 and R0, point to
one of the four data registers of each associated
potentiometer. The format is shown in Figure 9.
Slave Address Byte
The first byte sent to the CAT5241 from the master/
processor is called the Slave Address Byte. The most
significant four bits of the slave address are a device type
identifier. These bits for the CAT5241 are fixed at 0101[B]
(refer to Figure 8).
The next four bits, A3 − A0, are the internal slave address
and must match the physical device address which is defined
by the state of the A3 − A0 input pins for the CAT5241 to
successfully continue the command sequence. Only the
device which slave address matches the incoming device
address sent by the master executes the instruction. The A3
− A0 inputs can be actively driven by CMOS input signals
or tied to VCC or VSS.
Table 11. DATA REGISTER SELECTION
Data Register Selected
R1
R0
DR0
0
0
DR1
0
1
DR2
1
0
DR3
1
1
Device Type Identifier
ID3
0
ID2
ID1
1
0
Slave Address
ID0
A3
A2
A1
A0
1
(LSB)
(MSB)
Figure 8. Identification Byte Format
Instruction
Opcode
I3
I2
WCR/Pot Selection
I1
I0
P1
P0
(MSB)
Data Register
Selection
R1
R0
(LSB)
Figure 9. Instruction Byte Format
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CAT5241
Wiper Control and Data Registers
Data Registers (DR)
Each potentiometer has four 6-bit non-volatile Data
Registers. These can be read or written directly by the host.
Data can also be transferred between any of the four Data
Registers and the associated Wiper Control Register. Any
data changes in one of the Data Registers is a non-volatile
operation and will take a maximum of 5 ms.
If the application does not require storage of multiple
settings for the potentiometer, the Data Registers can be used
as standard memory locations for system parameters or user
preference data.
Wiper Control Register (WCR)
The CAT5241 contains four 6-bit Wiper Control
Registers, one for each potentiometer. The Wiper Control
Register output is decoded to select one of 64 switches along
its resistor array. The contents of the WCR can be altered in
four ways: it may be written by the host via Write Wiper
Control Register instruction; it may be written by
transferring the contents of one of four associated Data
Registers via the XFR Data Register instruction, it can be
modified one step at a time by the Increment/decrement
instruction (see Instruction section for more details).
Finally, it is loaded with the content of its data register zero
(DR0) upon power-up.
The Wiper Control Register is a volatile register that loses
its contents when the CAT5241 is powered-down. Although
the register is automatically loaded with the value in DR0
upon power-up, this may be different from the value present
at power-down.
Instructions
Four of the nine instructions are three bytes in length.
These instructions are:
Read Wiper Control Register – read the current wiper
position of the selected potentiometer in the WCR
Write Wiper Control Register – change current wiper
position in the WCR of the selected potentiometer
Read Data Register – read the contents of the selected
Data Register
Write Data Register – write a new value to the
selected Data Register.
Table 12. INSTRUCTION SET (Note: 1/0 = data is one or zero)
Instruction Set
I3
I2
I1
I0
WCR1/P1
WCR0/P0
R1
R0
Operations
Read Wiper Control
Register
1
0
0
1
1/0
1/0
0
0
Read the contents of the Wiper
Control Register pointed to by P1−P0
Write Wiper Control
Register
1
0
1
0
1/0
1/0
0
0
Write new value to the Wiper Control
Register pointed to by P1−P0
Read Data Register
1
0
1
1
1/0
1/0
1/0
1/0
Read the contents of the Data
Register pointed to by P1−P0 and
R1−R0
Write Data Register
1
1
0
0
1/0
1/0
1/0
1/0
Write new value to the Data Register
pointed to by P1−P0 and R1−R0
XFR Data Register to
Wiper Control Register
1
1
0
1
1/0
1/0
1/0
1/0
Transfer the contents of the Data
Register pointed to by P1−P0 and
R1−R0 to its associated Wiper Control
Register
XFR Wiper Control
Register to Data
Register
1
1
1
0
1/0
1/0
1/0
1/0
Transfer the contents of the Wiper
Control Register pointed to by P1−P0
to the Data Register pointed to by
R1−R0
Global XFR Data
Registers to Wiper
Control Registers
0
0
0
1
0
0
1/0
1/0
Transfer the contents of the Data
Registers pointed to by R1−R0 of all
four pots to their respective Wiper
Control Registers
Global XFR Wiper
Control Registers to
Data Register
1
0
0
0
0
0
1/0
1/0
Transfer the contents of both Wiper
Control Registers to their respective
data Registers pointed to by R1−R0 of
all four pots
Increment/Decrement
Wiper Control Register
0
0
1
0
1/0
1/0
0
0
Instruction
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Enable Increment/decrement of the
Control Latch pointed to by P1−P0
CAT5241
The basic sequence of the three byte instructions is
illustrated in Figure 11. These three-byte instructions
exchange data between the WCR and one of the Data
Registers. The WCR controls the position of the wiper. The
response of the wiper to this action will be delayed by tWRL.
A transfer from the WCR (current wiper position), to a Data
Register is a write to non-volatile memory and takes a
maximum of tWR to complete. The transfer can occur
between one of the four potentiometers and one of its
associated registers; or the transfer can occur between all
potentiometers and one associated register.
Four instructions require a two-byte sequence to
complete, as illustrated in Figure 10. These instructions
transfer data between the host/processor and the CAT5241;
either between the host and one of the data registers or
directly between the host and the Wiper Control Register.
These instructions are:
XFR Data Register to Wiper Control Register
This transfers the contents of one specified Data
Register to the associated Wiper Control Register.
XFR Wiper Control Register to Data Register
This transfers the contents of the specified Wiper
Control Register to the specified associated Data
Register.
0
SDA
1
0
Global XFR Data Register to Wiper Control
Register
This transfers the contents of all specified Data Registers
to the associated Wiper Control Registers.
Global XFR Wiper Counter Register to Data
Register
This transfers the contents of all Wiper Control Registers
to the specified associated Data Registers.
Increment/Decrement Command
The final command is Increment/Decrement (Figures 6
and 12). The Increment/Decrement command is different
from the other commands. Once the command is issued and
the CAT5241 has responded with an acknowledge, the
master can clock the selected wiper up and/or down in one
segment steps; thereby providing a fine tuning capability to
the host. For each SCL clock pulse (tHIGH) while SDA is
HIGH, the selected wiper will move one resistor segment
towards the RH terminal. Similarly, for each SCL clock
pulse while SDA is LOW, the selected wiper will move one
resistor segment towards the RL terminal.
See Instructions format for more detail.
1
S ID3 ID2 ID1 ID0 A3 A2 A1 A0
T
A
Internal
Device ID
R
Address
T
A
C
K
I0 P1 P0 R1 R0 A
C
K
Instruction Pot/WCR Register
Opcode
Address Address
I3
I2
I1
S
T
O
P
Figure 10. Two-Byte Instruction Sequence
SDA
0
1
0
1
S ID3 ID2 ID1 ID0 A3 A2 A1 A0 A I3 I2 I1 I0 P1 P0 R1 R0 A D7 D6 D5 D4 D3 D2 D1 D0
C
T
C
K
K
A
Device ID
Internal
WCR[7:0]
Instruction
R
Pot/WCR Data
Address
or
Opcode
Address Register
T
Data Register D[7:0]
Address
A S
C T
K O
P
Figure 11. Three-Byte Instruction Sequence
0
SDA
S
T
A
R
T
1
0
1
ID3 ID2 ID1 ID0 A3 A2 A1 A0
Device ID
Internal
Address
A
C
K
I3
I2
I1
I0
Instruction
Opcode
P1 P0 R1 R0
Data
Pot/WCR
Address Register
Address
A
C
K
I
N
C
1
Figure 12. Increment/Decrement Instruction Sequence
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11
I
N
C
2
I
N
C
n
D
E
C
1
D
E
C
n
S
T
O
P
CAT5241
INC/DEC
Command
Issued
tWRID
SCL
SDA
Voltage Out
RW
Figure 13. Increment/Decrement Timing Limits
Instruction Format
Table 13. READ WIPER CONTROL REGISTER (WCR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
0
0
1
P1
P0
0
0
A
C
K
DATA
7
6
5
4
3
2
1
0
A
C
K
S
T
O
P
A
C
K
S
T
O
P
A
C
K
S
T
O
P
A
C
K
S
T
O
P
Table 14. WRITE WIPER CONTROL REGISTER (WCR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
0
1
0
P1
P0
0
0
A
C
K
DATA
7
6
5
4
3
2
1
0
Table 15. READ DATA REGISTER (DR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
0
1
1
P1
P0
R1
R0
A
C
K
DATA
7
6
5
4
3
2
1
0
Table 16. WRITE DATA REGISTER (DR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
1
0
0
P1
P0
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12
R1
R0
A
C
K
DATA
7
6
5
4
3
2
1
0
CAT5241
Instruction Format (continued)
Table 17. GLOBAL TRANSFER DATA REGISTER (DR)
TO WIPER CONTROL REGISTER (WCR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
0
0
0
1
0
0
R1
R0
A
C
K
S
T
O
P
A
C
K
S
T
O
P
A
C
K
S
T
O
P
A
C
K
S
T
O
P
Table 18. GLOBAL TRANSFER WIPER CONTROL REGISTER (WCR)
TO DATA REGISTER (DR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
0
0
0
0
0
R1
R0
Table 19. TRANSFER WIPER CONTROL REGISTER (WCR)
TO DATA REGISTER (DR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
1
1
0
P1
P0
R1
R0
Table 20. TRANSFER DATA REGISTER (DR)
TO WIPER CONTROL REGISTER (WCR)
S
T
A
R
T
DEVICE ADDRESSES
0
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
1
1
0
1
P1
P0
R1
R0
Table 21. INCREMENT (I)/DECREMENT (D) WIPER CONTROL REGISTER (WCR)
S
T
A
R
T
DEVICE ADDRESSES
0
NOTE:
1
0
1
A3
A2
A1
A0
A
C
K
INSTRUCTION
0
0
1
0
P1
P0
0
0
A
C
K
DATA
I/D
I/D
...
I/D
I/D
Any write or transfer to the Non-volatile Data Registers is followed by a high voltage cycle after a STOP has been issued.
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13
S
T
O
P
CAT5241
Table 22. ORDERING INFORMATION
Orderable Part Number
Resistance (kW)
CAT5241WI−25−T1
2.5
CAT5241WI−10−T1
10
CAT5241WI−50−T1
50
CAT5241WI−00−T1
100
CAT5241YI−25−T2
2.5
CAT5241YI−10−T2
10
CAT5241YI−50−T2
50
CAT5241YI−00−T2
100
CAT5241WI25
2.5
CAT5241WI10
10
CAT5241WI50
50
CAT5241WI00
100
CAT5241YI25
2.5
CAT5241YI10
10
CAT5241YI50
50
CAT5241YI00
100
Lead Finish
Package
Shipping†
SOIC
(Pb−Free)
1000 / Tape & Reel
TSSOP
(Pb−Free)
2000 / Tape & Reel
SOIC
(Pb−Free)
36 Units / Tube
TSSOP
(Pb−Free)
74 Units / Tube
Matte−Tin
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
13. For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device
Nomenclature document, TND310/D, available at www.onsemi.com.
14. All packages are RoHS-compliant (Lead-free, Halogen-free).
15. The standard lead finish is Matte-Tin.
16. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.
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14
CAT5241
PACKAGE DIMENSIONS
SOIC−20, 300 mils
CASE 751BJ
ISSUE O
SYMBOL
E1
MIN
NOM
MAX
2.49
2.64
A
2.36
A1
0.10
0.30
A2
2.05
2.55
b
0.31
0.41
0.51
c
0.20
0.27
0.33
D
12.60
12.80
13.00
E
10.01
10.30
10.64
E1
7.40
7.50
7.60
E
1.27 BSC
e
b
e
PIN#1 IDENTIFICATION
h
0.25
L
0.40
0.75
0.81
1.27
θ
0º
8º
θ1
5º
15º
TOP VIEW
D
h
q1
q
A2
A
h
q1
L
A1
END VIEW
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-013.
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c
CAT5241
PACKAGE DIMENSIONS
TSSOP20, 4.4x6.5
CASE 948AQ
ISSUE A
b
SYMBOL
MIN
NOM
A
E1
E
MAX
1.20
A1
0.05
0.15
A2
0.80
1.05
b
0.19
0.30
c
0.09
0.20
D
6.40
6.50
6.60
E
6.30
6.40
6.50
E1
4.30
4.40
4.50
e
L
0.65 BSC
0.45
L1
θ
0.60
0.75
1.00 REF
0º
8º
e
TOP VIEW
D
c
A2
A θ1
L
A1
SIDE VIEW
END VIEW
L1
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-153.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks,
copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC
reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
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limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications
and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC
does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for
surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where
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its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly,
any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture
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