CAT5409 D

CAT5409
Quad Digital
Potentiometer (POT)
with 64 Taps
and I2C Interface
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Description
The CAT5409 is four digital POTs integrated with control logic and
16 bytes of NVRAM memory.
A separate 6-bit control register (WCR) independently controls the
wiper tap position 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 Write Protection (WP) pin protects against inadvertent
programming of the data register.
The CAT5409 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.
SOIC−24
W SUFFIX
CASE 751BK
PIN CONNECTIONS
VCC
NC
1
RL0
RL3
RH0
RH3
RW0
RW3
A2
Features














TSSOP24
Y SUFFIX
CASE 948AR
Four Linear Taper Digital Potentiometers
64 Resistor Taps per Potentiometer
End to End Resistance 2.5 kW, 10 kW, 50 kW or 100 kW
I2C Interface
Low Wiper Resistance, Typically 80 W
Four Non-volatile Wiper Settings for Each Potentiometer
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
24-lead SOIC and 24-lead TSSOP
Write Protection for Data Register
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
WP
SDA
A0
CAT5409
NC
A3
A1
SCL
RL1
RL2
RH1
RH2
RW1
RW2
GND
NC
SOIC−24 (W)
(Top View)
SDA
A1
RL1
RH1
RW1
GND
NC
RW2
RH2
RL2
SCL
A3
1
CAT5409
WP
A2
RW0
RH0
RL0
VCC
NC
RL3
RH3
RW3
A0
NC
TSSOP−24 (Y)
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
 Semiconductor Components Industries, LLC, 2013
July, 2013 − Rev. 15
1
Publication Order Number:
CAT5409/D
CAT5409
MARKING DIAGRAMS
(SOIC−24)
(TSSOP−24)
L3B
CAT5409WT
−RRYMXXXX
RLB
CAT5409YT
3YMXXX
R = Resistance
1 = 2.5 KW
2 = 10 KW
4 = 50 KW
5 = 100 KW
L = Assembly Location
B = Product Revision (Fixed as “B”)
CAT5409Y = 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
L = Assembly Location
3 = Lead Finish − Matte-Tin
B = Product Revision (Fixed as “B”)
CAT = Fixed as “CAT”
5409W = 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
RH0 RH1 RH2
SCL
SDA
I2C BUS
INTERFACE
RH3
WIPER
CONTROL
REGISTERS
RW0
RW1
WP
A0
A1
A2
A3
CONTROL
LOGIC
NONVOLATILE
DATA
REGISTERS
RW2
RW3
RL0
RL1
Figure 1. Functional Diagram
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RL2
RL3
CAT5409
PIN DESCRIPTIONS
SCL: Serial Clock
The CAT5409 serial clock input pin is used to clock all
data transfers into or out of the device.
SDA: Serial Data
The CAT5409 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-Ored with the other open
drain or open collector outputs.
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 CAT5409.
RH, RL: Resistor End Points
The four sets of RH and RL pins are equivalent to the
terminal connections on a mechanical potentiometer.
RW: Wiper
The four RW pins are equivalent to the wiper terminal of
a mechanical potentiometer.
WP: Write Protect Input
The WP pin when tied low prevents non-volatile writes to
the data registers (change of wiper control register is
allowed) and when tied high or left floating normal
read/write operations are allowed. See Write Protection on
page 8 for more details.
Table 1. PIN DESCRIPTIONS
Pin#
(TSSOP)
Pin#
(SOIC)
Name
19
1
VCC
Supply Voltage
20
2
RL0
Low Reference Terminal
for Potentiometer 0
21
3
RH0
High Reference Terminal
for Potentiometer 0
22
4
RW0
Wiper Terminal for
Potentiometer 0
23
5
A2
Device Address
24
6
WP
Write Protection
1
7
SDA
Serial Data Input/Output
2
8
A1
Device Address
3
9
RL1
Low Reference Terminal
for Potentiometer 1
4
10
RH1
High Reference Terminal
for Potentiometer 1
5
11
RW1
Wiper Terminal for
Potentiometer 1
6
12
GND
Ground
7
13
NC
No Connect
8
14
RW2
Wiper Terminal for
Potentiometer 2
9
15
RH2
High Reference Terminal
for Potentiometer 2
10
16
RL2
Low Reference Terminal
for Potentiometer 2
11
17
SCL
Bus Serial Clock
12
18
A3
Device Address
13
19
NC
No Connect
14
20
A0
Device Address, LSB
15
21
RW3
Wiper Terminal for
Potentiometer 3
16
22
RH3
High Reference Terminal
for Potentiometer 3
17
23
RL3
Low Reference Terminal
for Potentiometer 3
18
24
NC
No Connect
Function
DEVICE OPERATION
The CAT5409 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 allows 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.
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CAT5409
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
Temperature Under Bias
−55 to +125
C
Storage Temperature
−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 = 25C)
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
Parameters
Ratings
Units
VCC
+2.5 to +6
V
Industrial Temperature
−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 (−2.5)
2.5
kW
Potentiometer Resistance Tolerance
20
%
1
%
25C, each pot
50
mW
6
mA
300
W
150
W
VCC
V
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
Voltage on any RH or RL Pin
VSS = 0 V
Resolution
80
GND
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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CAT5409
Table 5. D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Parameter
Symbol
Test Conditions
Min
Max
Units
fSCL = 400 kHz
1
mA
VIN = GND or VCC, SDA Open
1
mA
VIN = GND to VCC
10
mA
ICC
Power Supply Current
ISB
Standby Current (VCC = 5 V)
ILI
Input Leakage Current
ILO
Output Leakage Current
10
mA
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
VOUT = GND to VCC
Output Low Voltage (VCC = 3 V)
IOL = 3 mA
Table 6. CAPACITANCE (Note 8) (TA = 25C, f = 1.0 MHz, VCC = 5 V)
Symbol
Test
Conditions
Max
Units
CI/O
Input/Output Capacitance (SDA)
VI/O = 0 V
8
pF
CIN
Input Capacitance (A0, A1, A2, A3, SCL, WP)
VIN = 0 V
6
pF
8. This parameter is tested initially and after a design or process change that affects the parameter.
Table 7. A.C. CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol
fSCL
TI (Note 10)
tAA
tBUF (Note 10)
Parameter
Min
Typ
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
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
tHD:STA
Clock High Period
0.6
ms
tSU:STA
Start Condition SetupTime (for a Repeated Start Condition)
0.6
ms
tHD:DAT
Data in Hold Time
0
ns
tSU:DAT
Data in Setup Time
100
ns
tR (Note 10)
SDA and SCL Rise Time
0.3
ms
tF (Note 10)
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 10)
Parameter
Symbol
Max
Units
tPUR
Power-up to Read Operation
1
ms
tPUW
Power-up to Write Operation
1
ms
Max
Units
5
ms
Table 9. WRITE CYCLE LIMITS (Note 9)
Parameter
Symbol
tWR
Write Cycle Time
9. 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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CAT5409
Table 10. RELIABILITY CHARACTERISTICS
Symbol
Parameter
Reference Test Method
Min
Max
Units
NEND (Note 10)
Endurance
MIL−STD−883, Test Method 1033
1,000,000
Cycles/Byte
TDR (Note 10)
Data Retention
MIL−STD−883, Test Method 1008
100
Years
VZAP (Note 10)
ESD Susceptibility
MIL−STD−883, Test Method 3015
2000
V
ILTH (Notes 10, 11)
Latch-up
JEDEC Standard 17
100
mA
10. This parameter is tested initially and after a design or process change that affects the parameter.
11. tPUR and tPUW are 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
SDA
8TH BIT
ACK
BYTE n
tWR
STOP
CONDITION
START
CONDITION
Figure 3. Write Cycle Timing
SDA
SCL
START CONDITION
STOP CONDITION
Figure 4. Start/Stop Timing
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ADDRESS
CAT5409
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.
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 CAT5409 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.
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 CAT5409 will be considered a slave device
in all applications.
DEVICE ADDRESSING
Acknowledge
The bus Master begins a transmission by sending a
START condition. The Master then sends the address of the
particular slave device it is requesting. The four most
significant bits of the 8−bit slave address are fixed as 0101
for the CAT5409 (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 CAT5409 monitors the bus and responds
with an acknowledge (on the SDA line) when its address
matches the transmitted slave address.
SCL FROM
MASTER
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 CAT5409 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 CAT5409 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
CAT5409 will continue to transmit data. If no acknowledge
is sent by the Master, the device terminates data transmission
and waits for a STOP condition.
1
8
9
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
START
ACKNOWLEDGE
Figure 5. Acknowledge Timing
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CAT5409
WRITE OPERATIONS
CAT5409 initiates the internal write cycle. ACK polling can
be initiated immediately. This involves issuing the start
condition followed by the slave address. If the CAT5409 is
still busy with the write operation, no ACK will be returned.
If the CAT5409 has completed the write operation, an ACK
will be returned and the host can then proceed with the next
instruction operation.
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 CAT5409. 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 CAT5409
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.
Write Protection
The Write Protection feature allows the user to protect
against inadvertent programming of the non-volatile data
registers. If the WP pin is tied to LOW, the data registers are
protected and become read only. Similarly, the WP pin going
low after start but after start will interrupt non−volatile write
to data registers, while the WP pin going low after internal
write cycle has started, will have no effect on any write
operation. The CAT5409 will accept both slave addresses
and instructions, but the data registers are protected from
programming by the device’s failure to send an
acknowledge after data is received.
Acknowledge Polling
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
CAT5409
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
op code
S
SLAVE
T
ADDRESS
BUS ACTIVITY: A
MASTER R Fixed Variable
T
Register
Address
Pot/WCR
Address
INSTRUCTION
BYTE
S
T
O
P
DR1 WCRDATA
P
S
A
C
K
A
C
K
Figure 7. Write Timing
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A
C
K
CAT5409
INSTRUCTION AND REGISTER DESCRIPTION
Slave Address Byte
Instruction Byte
The first byte sent to the CAT5409 from the master/
processor is called the Slave Address Byte. The most
significant four bits of the Device Type address are a device
type identifier. These bits for the CAT5409 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 CAT5409 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.
The next byte sent to the CAT5409 contains the
instruction and register pointer information. The four most
significant bits used provide the instruction opcode I [3:0].
The R1 and R0 bits point to one of the four data registers of
each associated potentiometer. The least two significant bits
point to one of four Wiper Control Registers. The format is
shown in Figure 9.
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
Slave Address
ID2
ID1
1
0
0
ID0
A3
A2
A1
A0
1
(MSB)
(LSB)
Figure 8. Identification Byte Format
Instruction
Opcode
I3
I2
(MSB)
I1
Data Register
Selection
I0
R1
R0
Figure 9. Instruction Byte Format
WCR/Pot Selection
P1
P0
(LSB)
WIPER CONTROL AND DATA REGISTERS
Wiper Control Register (WCR)
Data Registers (DR)
The CAT5409 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 CAT5409 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.
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.
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
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CAT5409
 Read Data Register – read the contents of the selected
 Write Data Register – write a new value to the
Data Register
selected Data Register
Table 12. INSTRUCTION SET (Note: 1/0 = data is one or zero)
Instruction Set
I3
I2
I1
I0
R1
R0
WCR1/ P1
WCR0/ P0
Read Wiper
Control Register
1
0
0
1
0
0
1/0
1/0
Read the contents of the Wiper Control
Register pointed to by P1−P0
Write Wiper Control
Register
1
0
1
0
0
0
1/0
1/0
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
Gang XFR Data
Registers to Wiper
Control Registers
0
0
0
1
1/0
1/0
0
0
Transfer the contents of the Data
Registers pointed to by R1−R0 of all four
pots to their respective Wiper Control
Registers
Gang XFR Wiper
Control Registers
to Data Register
1
0
0
0
1/0
1/0
0
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
0
0
1/0
1/0
Instruction
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
minimum 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 CAT5409;
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.
Operation
Enable Increment/decrement of the
Control Latch pointed to by P1−P0
 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 CAT5409 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.
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10
CAT5409
0
SDA
1
0
1
S ID3 ID2 ID1 ID0 A3 A2 A1 A0
T
A
Internal
Device ID
R
Address
T
A
C
K
I0 R1 R0 P1 P0 A
C
K
Instruction
Register Pot/WCR
Opcode
Address Address
I3
I2
I1
S
T
O
P
Figure 10. Two-byte Instruction Sequence
0
SDA
1
0
1
S ID3 ID2 ID1 ID0 A3 A2 A1 A0 A
T
C
A
K
Device ID
Internal
R
Address
T
I3
I2
I1 I0 R1 R0 P1 P0
Instruction
Opcode
Data Pot/WCR
Register Address
Address
A
C
K
D7 D6 D5 D4 D3 D2 D1 D0 A S
C T
K O
WCR[7:0]
P
or
Data Register D[7:0]
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
R1 R0 P1 P0 A
C
Data Pot/WCR K
Register Address
Address
I
N
C
1
I
N
C
2
Figure 12. Increment/Decrement Instruction Sequence
INC/DEC
Command
Issued
tWRID
SCL
SDA
RW
Voltage Out
Figure 13. Increment/Decrement Timing Limits
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11
I
N
C
n
D
E
C
1
D
E
C
n
S
T
O
P
CAT5409
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
0
0
P1
P0
A
C
K
DATA
7
6
0
0
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
0
0
P1
P0
A
C
K
DATA
7
6
0
0
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
R1
R0
P1
P0
A
C
K
DATA
7
6
0
0
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
R1
R0
P1
P0
A
C
K
DATA
7
6
0
0
5
4
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
R1
R0
0
0
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
R1
R0
0
0
A
C
K
S
T
O
P
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
R1
R0
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12
P1
P0
A
C
K
S
T
O
P
3
2
1
0
CAT5409
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
R1
R0
P1
P0
A
C
K
S
T
O
P
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
0
0
P1
P0
A
C
K
DATA
I/D
I/D
...
I/D
I/D
S
T
O
P
Any write or transfer to the Non−volatile Data Registers is followed by a high voltage cycle after a STOP has been issued.
Table 22. ORDERING INFORMATION
Orderable Part Number
Resistance (kW)
CAT5409WI−25−T1
2.5
CAT5409WI−10−T1
10
CAT5409WI−50−T1
50
CAT5409WI−00−T1
100
CAT5409YI−25−T2
2.5
CAT5409YI−10−T2
10
CAT5409YI−50−T2
50
CAT5409YI−00−T2
100
CAT5409WI25
2.5
CAT5409WI10
10
CAT5409WI50
50
CAT5409WI00
100
CAT5409YI25
2.5
CAT5409YI10
10
CAT5409YI50
50
CAT5409YI00
100
Lead Finish
Package
Shipping†
SOIC−24
1,000 / Tape & Reel
TSSOP24
2,000 / Tape & Reel
SOIC−24
31 Units / Tube
TSSOP24
62 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.
12. 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.
13. All packages are RoHS-compliant (Pb-Free, Halogen Free).
14. The standard lead finish is Matte-Tin.
15. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.
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13
CAT5409
PACKAGE DIMENSIONS
SOIC−24, 300 mils
CASE 751BK
ISSUE O
E1
SYMBOL
MIN
A
2.35
2.65
A1
0.10
0.30
A2
2.05
2.55
b
0.31
0.51
c
0.20
0.33
D
15.20
15.40
E
10.11
10.51
E1
7.34
7.60
E
e
PIN#1 IDENTIFICATION
MAX
1.27 BSC
e
b
NOM
h
0.25
0.75
L
0.40
1.27
θ
0º
8º
θ1
5º
15º
TOP VIEW
h
D
A2
A
A1
SIDE VIEW
h
q1
q
q1
L
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-013.
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14
c
CAT5409
PACKAGE DIMENSIONS
TSSOP24, 4.4x7.8
CASE 948AR
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
7.70
7.80
7.90
E
6.25
6.40
6.55
E1
4.30
4.40
4.50
e
L
0.65 BSC
0.50
L1
θ
0.60
0.70
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.
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For additional information, please contact your local
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CAT5409/D
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