CATALYST CAT5269JI

H
CAT5269
EE
GEN FR
ALO
Dual Digitally Programmable Potentiometers (DPP™)
with 256 Taps and 2-wire Interface
LE
A D F R E ETM
FEATURES
■ Two linear taper digitally programmable poten-
■ Automatic recall of saved wiper settings at
tiometers
power up
■ 256 resistor taps per potentiometer
■ 2.5 to 6.0 volt operation
Ω or 100kΩ
Ω
■ End to end resistance 50kΩ
■ Standby current less than 1 µA
■ Potentiometer control and memory access via
■ 1,000,000 nonvolatile WRITE cycles
2-wire interface (I2C like)
■ 100 year nonvolatile memory data retention
Ω
■ Low wiper resistance, typically 100Ω
■ 24-lead SOIC and TSSOP packages
■ Nonvolatile memory storage for up to four
■ Industrial temperature range
wiper settings for each potentiometer
DESCRIPTION
The CAT5269 is two digitally programmable
potentiometers (DPPs™) integrated with control logic
and 18 bytes of NVRAM memory. Each DPP consists of
a series of 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 8-bit control
register (WCR) independently controls the wiper tap
switches for each DPP. Associated with each wiper
control register are four 8-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 2-wire 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 registers.
PIN CONFIGURATION
FUNCTIONAL DIAGRAM
The CAT5269 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. It is available in the -40˚C to 85˚C industrial
operating temperature range and offered in a 24-lead
SOIC and TSSOP packages.
SOIC Package (J, W)
TSSOP Package (U, Y)
RH0 RH1
NC
1
24
A3
A0
2
23
SCL
NC
3
22
NC
NC
4
21
NC
SCL
NC
5
20
NC
SDA
NC
NC
6
VCC
R L0
7
CAT 19
5269 18
8
17
R W1
R H0
9
16
R H1
RW0
10
15
R L1
A2
11
14
A1
WP
12
13
SDA
GND
2-WIRE BUS
INTERFACE
WIPER
CONTROL
REGISTERS
R W0
R W1
WP
A0
A1
A2
A3
CONTROL
LOGIC
NONVOLATILE
DATA
REGISTERS
RL0 RL1
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Document No. 2123, Rev. B
CAT5269
PIN DESCRIPTION
Pin
(SOIC)
Name
Function
1
NC
No Connect
2
A0
Device Address, LSB
3
NC
No Connect
4
NC
No Connect
5
NC
No Connect
6
NC
7
VCC
Supply Voltage
8
RL0
Low Reference Terminal for Potentiometer 0
9
RH0
High Reference Terminal for Potentiometer 0
10
RW0
11
A2
PIN DESCRIPTIONS
SCL: Serial Clock
The CAT5269 serial clock input pin is used to
clock all data transfers into or out of the device.
SDA: Serial Data
The CAT5269 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 I/Os.
No Connect
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 CAT5269.
Wiper Terminal for Potentiometer 0
Device Address
12
WP
Write Protection
13
SDA
Serial Data Input/Output
14
A1
Device Address
15
RL1
Low Reference Terminal for Potentiometer 1
16
RH1
High Reference Terminal for Potentiometer 1
17
RW1
Wiper Terminal for Potentiometer 1
18
GND
Ground
19
NC
No Connect
20
NC
No Connect
21
NC
No Connect
22
NC
No Connect
23
SCL
Bus Serial Clock
24
A3
Device Address
RH, RL: Resistor End Points
The two sets of RH and RL pins are equivalent
to the terminal connections on a mechanical
potentiometer.
RW:
Wiper
The RW pins are equivalent to the wiper terminal
of a mechanical potentiometer.
WP
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 7 for
more details.
DEVICE OPERATION
The CAT5269 is two resistor arrays integrated with a 2-wire serial interface, two 8-bit wiper control registers and eight
8-bit, non-volatile memory data registers. Each resistor array contains 255 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). 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 2-wire 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.
Document No. 2123, Rev. B
2
CAT5269
ABSOLUTE MAXIMUM RATINGS*
*COMMENT
Temperature Under Bias ................. –55°C to +125°C
Stresses above those listed under “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions
outside of those listed in the operational sections of this specification
is not implied. Exposure to any absolute maximum rating for extended
periods may affect device performance and reliability.
Storage Temperature ....................... –65°C to +150°C
Voltage on any Pin with
Respect toVSS(1)(2) ................ –2.0V to +VCC +2.0V
VCC with Respect to Ground ............... –2.0V to +7.0V
Recommended Operating Conditions:
Package Power Dissipation
Capability (Ta = 25°C) ................................... 1.0W
VCC = +2.5V to +6.0V
Temperature
Industrial
Lead Soldering Temperature (10 secs) ............ 300°C
Wiper Current .................................................... +6mA
Min
-40°C
Max
85°C
Note:
(1) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns.
Maximum DC voltage on output pins is VCC +0.5V, which may overshoot to VCC +2.0V 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 –1V to VCC +1V.
POTENTIOMETER CHARACTERISTICS
(Over recommended operating conditions unless otherwise stated.)
Limits
Typ.
Symbol
Parameter
Min.
Max.
Units
RPOT
Potentiometer Resistance (100KΩ)
100
kΩ
RPOT
Potentiometer Resistance (50KΩ)
50
kΩ
Test Conditions
Potentiometer Resistance
Tolerance
+20
%
RPOT Matching
1
%
Power Rating
50
mW
IW
Wiper Current
+3
mA
RW
Wiper Resistance
200
300
Ω
IW = +3mA @ VCC = 3V
RW
Wiper Resistance
100
150
Ω
IW = +3mA @ VCC = 5V
VTERM
Voltage on any RH or RL Pin
VCC
V
VSS = 0V
VN
Noise
nV/√Hz
(1)
VSS
Resolution
0.4
25°C, each pot
%
Absolute Linearity (2)
+1
LSB (4)
Rw(n)(actual)-R(n)(expected)(5)
Relative Linearity (3)
+0.2
LSB (4)
Rw(n+1)-[Rw(n)+LSB](5)
ppm/˚C
(1)
ppm/˚C
(1)
TCRPOT
Temperature Coefficient of
RPOT
+300
TCRATIO
Ratiometric Temp. Coefficient
CH/CL/CW
Potentiometer Capacitances
10/10/25
pF
(1)
fc
Frequency Response
0.4
MHz
RPOT = 50KΩ(1)
20
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Absolute linearity is utilitzed to determine actual wiper voltage versus expected voltage as determined by wiper position when used
as a potentiometer.
(3) 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.
(4) LSB = RTOT / 255 or (RH - RL) / 255, single pot
(5) n = 0, 1, 2, ..., 255
3
Document No. 2123, Rev. B
CAT5269
D.C. OPERATING CHARACTERISTICS
VCC = +2.5V to +6.0V, unless otherwise specified.
Symbol
Parameter
ICC1
Min
Max
Units
Test Conditions
Power Supply Current
1
mA
fSCL = 400 KHz, SDA Open
VCC = 6 V, Input = GND
ICC2
Power Supply Current
Non-volatile WRITE
5
mA
fSCK = 400 KHz, SDA Open
VCC = 6 V, Input = GND
ISB
Standby Current (VCC = 5.0V)
5
µA
VIN = GND or VCC, SDA Open
ILI
Input Leakage Current
10
µA
VIN = GND to VCC
ILO
Output Leakage Current
10
µA
VOUT = GND to VCC
VIL
Input Low Voltage
VCC x 0.3
V
VIH
Input High Voltage
VCC x 0.7 VCC + 1.0
V
VOL1
Output Low Voltage (VCC = 3.0V)
0.4
V
IOL = 3 mA
VOL2
Output Low Voltage (VCC = 1.8V)
0.5
V
IOL = 1.5 mA
-1
CAPACITANCE
TA = 25˚C, f = 1.0 MHz, VCC = 5V
Symbol
CI/O
CIN
(1)
(1)
Test
Max.
Units
Conditions
Input/Output Capacitance (SDA)
8
pF
VI/O = 0V
Input Capacitance (A0, A1, A2, A3, SCL, WP)
6
pF
VIN = 0V
A.C. CHARACTERISTICS
2.5V-6.0V
Symbol
Parameter
fSCL
Min.
Max.
Units
Clock Frequency
400
kHz
TI(1)
Noise Suppression Time Constant at SCL, SDA Inputs
200
ns
tAA
SLC Low to SDA Data Out and ACK Out
1
µs
tBUF(1)
Time the bus must be free before a new transmission can start
1.2
µs
tHD:STA
Start Condition Hold Time
0.6
µs
tLOW
Clock Low Period
1.2
µs
tHIGH
Clock High Period
0.6
µs
tSU:STA
Start Condition SetupTime (for a Repeated Start Condition)
0.6
µs
tHD:DAT
Data in Hold Time
0
ns
tSU:DAT
Data in Setup Time
50
ns
tR(1)
SDA and SCL Rise Time
0.3
µs
tF(1)
SDA and SCL Fall Time
300
ns
tSU:STO
Stop Condition Setup Time
0.6
µs
tDH
Data Out Hold Time
100
ns
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
Document No. 2123, Rev. B
4
CAT5269
POWER UP TIMING (1)(2)
Symbol
Parameter
Max.
Units
tPUR
Power-up to Read Operation
1
ms
tPUW
Power-up to Write Operation
1
ms
XDCP TIMING
Symbol
Parameter
tWRPO
tWRL
Min
Max
Units
Wiper Response Time After Power Supply Stable
5
10
µs
Wiper Response Time After Instruction Issued
5
10
µs
WRITE CYCLE LIMITS
Symbol
tWR
Parameter
Max.
Units
Write Cycle Time
5
ms
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.
RELIABILITY CHARACTERISTICS
Symbol
Units
Reference Test Method
1,000,000
Cycles/Byte
MIL-STD-883, Test Method 1033
Data Retention
100
Years
MIL-STD-883, Test Method 1008
VZAP
ESD Susceptibility
2000
Volts
MIL-STD-883, Test Method 3015
ILTH(1)
Latch-Up
100
mA
NEND
(1)
TDR(1)
(1)
Parameter
Endurance
Min.
Max.
JEDEC Standard 17
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.
Figure 1. Bus Timing
tHIGH
tF
tR
tLOW
tLOW
SCL
tSU:STA
tHD:STA
tHD:DAT
tSU:DAT
tSU:STO
SDA IN
tAA
tDH
tBUF
SDA OUT
5
Document No. 2123, Rev. B
CAT5269
SERIAL BUS PROTOCOL
After the Master sends a START condition and the slave
address byte, the CAT5269 monitors the bus and
responds with an acknowledge (on the SDA line) when
its address matches the transmitted slave address.
The following defines the features of the 2-wire 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.
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 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
CAT5269 will be considered a slave device in all
applications.
The CAT5269 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 CAT5269 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
CAT5269 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 CAT5269 monitors the
SDA and SCL lines and will not respond until this
condition is met.
WRITE OPERATIONS
STOP Condition
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 CAT5269. 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 CAT5269 acknowledges once more and the Master
generates the STOP condition, at which time if a nonvolatile 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.
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 particular slave device it is requesting. The four most
significant bits of the 8-bit slave address are fixed as
0101 for the CAT5269 (see Figure 5). 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, +5V and ground are hard-wired to
these pins to establish the device's address.
Figure 2. Write Cycle Timing
SCL
SDA
8TH BIT
BYTE n
ACK
tWR
STOP
CONDITION
Document No. 2123, Rev. B
6
START
CONDITION
ADDRESS
CAT5269
WRITE PROTECTION
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 CAT5269 initiates the internal write cycle. ACK
polling can be initiated immediately. This involves issuing
the start condition followed by the slave address. If the
CAT5269 is still busy with the write operation, no ACK
will be returned. If the CAT5269 has completed the write
operation, an ACK will be returned and the host can then
proceed with the next instruction operation.
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 will interrupt a nonvolatile write to data registers, while the WP pin going
low after an internal write cycle has stated will have no
effect on any write operation (see also CAT5409 or
CAT5259). The CAT5269 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.
Figure 3. Start/Stop Condition
SDA
SCL
START CONDITION
STOP CONDITION
Figure 4. Acknowledge Condition
SCL FROM
MASTER
1
8
9
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
ACKNOWLEDGE
START
Figure 5. Slave Address Bits
CAT5269
*
**
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.
7
Document No. 2123, Rev. B
CAT5269
INSTRUCTION AND REGISTER
DESCRIPTION
INSTRUCTION BYTE
The next byte sent to the CAT5269 contains the instruction
and register pointer information. The four most significant
bits used provide the instruction opcode I3 - I0. 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 two Wiper Control Registers. The format
is shown in Table 2.
SLAVE ADDRESS BYTE
The first byte sent to the CAT5269 from the master/
processor is called the Slave/DPP Address Byte. The
most significant four bits of the slave address are a
device type identifier. These bits for the CAT5269 are
fixed at 0101[B] (refer to Table 1).
Data Register Selection
Data Register Selected
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
CAT5269 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.
R1
R0
DR0
0
0
DR1
0
1
Figure 6. Write Timing
BUS ACTIVITY:
MASTER
S
T
A
R
T
SDA LINE
INSTRUCTION
BYTE
SLAVE/DPP
ADDRESS
Fixed
Variable
Register Pot1 WCR
Address Address
op code
S
T
O
P
DR1 WCRDATA
S
P
A
C
K
A
C
K
A
C
K
5020 FHD F08
Table 1. Identification Byte Format
Device Type
Identifier
Slave Address
ID3
ID2
ID1
ID0
0
1
0
1
A3
A2
A1
(MSB)
A0
(LSB)
Table 2. Instruction Byte Format
Instruction
Opcode
I3
I2
Data Register
Selection
I1
I0
R1
(MSB)
Document No. 2123, Rev. B
R0
WCR/Pot Selection
P1
P0
(LSB)
8
CAT5269
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
10ms.
WIPER CONTROL AND DATA REGISTERS
Wiper Control Register (WCR)
The CAT5269 contains two 8-bit Wiper Control Registers,
one for each potentiometer. The Wiper Control Register
output is decoded to select one of 256 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.
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
The Wiper Control Register is a volatile register that
loses its contents when the CAT5269 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.
— Read Data Register - read the contents of the
selected Data Register
Data Registers (DR)
— Write Data Register - write a new value to the
selected Data Register
Each potentiometer has four 8-bit non-volatile Data
Registers. These can be read or written directly by the
host. Data can also be transferred between any of the
The basic sequence of the three byte instructions is
illustrated in Figure 8. These three-byte instructions
Table 3. Instruction Set
Instruction Set
Instruction
Read Wiper Control
Register
Write Wiper Control Register
I3
I2
I1
I0
R1
R0
WCR1/
P1
WCR0/
P0
1
0
0
1
0
0
1/0
1/0
1
0
1
0
0
0
1/0
1/0
Read Data Register
1
0
1
1
1/0
1/0
1/0
1/0
Write Data Register
1
1
0
0
1/0
1/0
1/0
1/0
XFR Data Register to Wiper
Control Register
1
1
0
1
1/0
1/0
1/0
1/0
XFR Wiper Control Register
to Data Register
1
1
1
0
1/0
1/0
1/0
1/0
Gang XFR Data Registers
to Wiper Control Registers
0
0
0
1
1/0
1/0
0
0
Gang XFR Wiper Control
Registers to Data Register
1
0
0
0
1/0
1/0
0
0
Increment/Decrement Wiper
Control Register
0
0
1
0
0
0
1/0
1/0
Note:
Operation
Read the contents of the Wiper Control
Register pointed to by P1-P0
Write new value to the Wiper Control
Register pointed to by P1-P0
Read the contents of the Data Register
pointed to by P1-P0 and R1-R0
Write new value to the Data Register
pointed to by P1-P0 and R1-R0
Transfer the contents of the Data Register
pointed to by P1-P0 and R1-R0 to its
associated Wiper Control Register
Transfer the contents of the Wiper Control
Register pointed to by P1-P0 to the Data
Register pointed to by R1-R0
Transfer the contents of the Data Registers
pointed to by R1-R0 of both pots to their
respective Wiper Control Registers
Transfer the contents of both Wiper Control
Registers to their respective data Registers
pointed to by R1-R0 of both pots
Enable Increment/decrement of the Control
Latch pointed to by P1-P0
1/0 = data is one or zero
9
Document No. 2123, Rev. B
CAT5269
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 tWR. 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 two potentiometers and one of
its associated registers; or the transfer can occur between
both potentiometers and one associated register.
— Gang XFR Data Register to Wiper
Control Register
This transfers the contents of all specified Data
Registers to the associated Wiper Control
Registers.
— Gang XFR Wiper Counter Register to
Data Register
This transfers the contents of all Wiper Control
Registers to the specified associated Data
Registers.
Four instructions require a two-byte sequence to
complete, as illustrated in Figure 7. These instructions
transfer data between the host/processor and the
CAT5269; either between the host and one of the data
registers or directly between the host and the Wiper
Control Register. These instructions are:
INCREMENT/DECREMENT COMMAND
The final command is Increment/Decrement (Figure 9
and 10). The Increment/Decrement command is different from the other commands. Once the command is
issued and the CAT5269 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.
— 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.
See Instructions format for more detail.
Figure 7. Two-Byte Instruction Sequence
SDA
0
1
0
1
S ID3 ID2 ID1 ID0 A3 A2 A1 A0
T
A
Internal
R
Device ID
Address
T
A I3
C
K
I2
I1
I0
Instruction
Opcode
R1 R0 P1 P0
Register
Address
A
C
K
Pot/WCR
Address
S
T
O
P
Figure 8. Three-Byte Instruction Sequence
SDA
0
1
0
1
S ID3 ID2 ID1 ID0 A3
T
A
Device ID
R
T
A2
A0 A I3
C
K
Internal
Address
I2
A1
I1 I0
R1 R0 P1 P0 A
C
K
Data
Pot/WCR
Register Address
Address
Instruction
Opcode
D7 D6 D5 D4 D3 D2 D1 D0
WCR[7:0]
or
Data Register D[7:0]
A
C
K
S
T
O
P
Figure 9. Increment/Decrement Instruction Sequence
0
SDA
S
T
A
R
T
1
0
1
ID3 ID2 ID1 ID0
Device ID
Document No. 2123, Rev. B
A3
A2 A1 A0
Internal
Address
A
C
K
I3
I2
I1
I0
Instruction
Opcode
10
R1 R0 P1 P0
A
C
Pot/WCR
K
Data
Address
Register
Address
I
N
C
1
I
N
C
2
I
N
C
n
D
E
C
1
D
E
C
n
S
T
O
P
CAT5269
Figure 10. Increment/Decrement Timing Limits
INC/DEC
Command
Issued
tWRL
SCL
SDA
Voltage Out
RW
INSTRUCTION FORMAT
Read Wiper Control Register (WCR)
S
T
A
R
T
DEVICE ADDRESSES
0 1 0 1 A A A A
3
A
C
K
INSTRUCTION
1 0 0 1 0 0 P P
2 1 0
A
C
K
4 3
2 1 0
A
C
K
S
T
O
P
DATA
A
C
2 1 0
K
S
T
O
P
A
C
2 1 0
K
S
T
O
P
A
C
2 1 0
K
S
T
O
P
DATA
7 6
5
1 0
Write Wiper Control Register (WCR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
A
C
K
A
C
1 0 1 0 0 0 P P
K
1 0
A
C
K
A
C
1 0 1 1 R R P P
K
1 0 1 0
A
C
K
A
C
1 1 0 0 R R P P
K
1 0 1 0
2 1 0
INSTRUCTION
7 6
5
4 3
Read Data Register (DR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
2 1 0
INSTRUCTION
DATA
7 6
5
4 3
Write Data Register (DR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
2 1 0
INSTRUCTION
11
DATA
7 6
5
4 3
Document No. 2123, Rev. B
CAT5269
INSTRUCTION FORMAT (continued)
Gang Transfer Data Register (DR) to Wiper Control Register (WCR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
A
C
K
2 1 0
INSTRUCTION
0 0 0 1 R R 0 0
A
C
K
1 0
S
T
O
P
Gang Transfer Wiper Control Register (WCR) to Data Register (DR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
A
C
K
2 1 0
INSTRUCTION
1 0 0 0 R R 0 0
A
C
K
1 0
S
T
O
P
Transfer Wiper Control Register (WCR) to Data Register (DR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
A
C
K
2 1 0
A
C
1 1 1 0 R R P P
K
1 0 1 0
INSTRUCTION
S
T
O
P
Transfer Data Register (DR) to Wiper Control Register (WCR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
A
C
K
2 1 0
A
C
1 1 0 1 R R P P
K
1 0 1 0
INSTRUCTION
S
T
O
P
Increment (I)/Decrement (D) Wiper Control Register (WCR)
S
T
A
R
T
DEVICE ADDRESS
0 1 0 1 A A A A
3
2 1 0
A
C
K
A
C
0 0 1 0 0 0 P P
K
1 0
INSTRUCTION
DATA
I
I
/
/
D D
• • •
I
I
/
/
A
C
K
S
T
O
P
D D
Notes:
(1) Any write or transfer to the Non-volatile Data Registers is followed by a high voltage cycle after a STOP has been issued.
Document No. 2123, Rev. B
12
CAT5269
ORDERING INFORMATION
U: TSSOP
Y: TSSOP (Lead free, Halogen free)
Notes:
(1) The device used in the above example is a CAT5269JI00-TE13 (SOIC, Industrial Temperature, 100K Ohm, Tape & Reel)
PACKAGING INFORMATION
24-LEAD 300 MIL WIDE SOIC (J, W)
0.2914 (7.40)
0.2992 (7.60)
0.394 (10.00)
0.419 (10.65)
0.5985 (15.20)
0.6141 (15.60)
0.0926 (2.35)
0.1043 (2.65)
0.050 (1.27) BSC
0.0040 (0.10)
0.0118 (0.30)
0.013 (0.33)
0.020 (0.51)
0.010 (0.25)
X 45
0.029 (0.75)
0.0091 (0.23)
0.0125 (0.32)
0 —8
0.016 (0.40)
0.050 (1.27)
13
Package Information shown in inches (mm).
Document No. 2123, Rev. B
CAT5269
PACKAGING INFORMATION CON'T
24 Lead TSSOP (U)
7.8 + 0.1
-A-
7.72 TYP
6.4
4.16 TYP
4.4 + 0.1
-B(1.78 TYP)
3.2
0.42 TYP
0.65 TYP
0.2 C B A
ALL LEAD TIPS
PIN #1 INDENT.
1.1 MAX TYP
LAND PATTERN RECOMMENDATION
0.1 C
ALL LEAD TIPS
(0.9)
-C0.10 + 0.05 TYP
0.65 TYP
0.19 - 0.30 TYP
0.3 M A B S C S
SEE DETAIL A
GAGE PLANE
0.25
0.09 - 0.20 TYP
o
o
0-8
0.6+0.1
SEATING PLANE
DETAIL A
Package Information shown in mm.
Document No. 2123, Rev. B
14
REVISION HISTORY
Date
Rev.
Reason
11/18/2003
A
Initial issue
5/6/2004
B
Added TSSOP package in all areas
Updated Functional Diagram
Updated Pin Descriptions
Updated notes in Absolute Max Ratings
Updated Potentiometer Characteristics table
Updated DC Characteristics table
Added XDCP Timing table
Updated Write Cycle LImits table
Changed Figure 3 drawing to Start/Stop Condition from
Start/Stop Timing
Changed Figure 4 title to Acknowlege Condition (from Acknowlege Timing)
Updated Table 3 Gang XFR Operation information
Corrected Instruction Format for Gang Transfer Data Register (DR)
to Wiper Control Register (WCR)
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Publication #:
Revison:
Issue date:
2123
B
5/6/04