CAT5401WI-00-TE13 ON Semiconductor, CAT5401WI-00-TE13 Datasheet - Page 2

• Manufacturer Part Number: CAT5401WI-00-TE13
• Manufacturer: ON Semiconductor

Specifications of CAT5401WI-00-TE13

• Number Of Elements: 4
• # Of Taps: 64
• Resistance (max): 100KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (SPI)
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): 2.5V
• Single Supply Voltage (max): 6V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 24
• Lead Free Status / RoHS Status: Compliant

PIN DESCRIPTION
WP
WP
WP:
WP is the Write Protect pin. The Write Protect pin will allow normal read/write operations when held high. When WP is tied low, all
non-volatile write operations to the Data registers are inhibited (change of wiper control register is allowed). WP going low while
CS is still low will interrupt a write to the registers. If the internal write cycle has already been initiated, WP going low will have no
effect on any write operation.
HOLD
HOLD
HOLD: Hold
The HOLD pin is used to pause transmission to the CAT5401 while in the middle of a serial sequence without having to re-
transmit entire sequence at a later time. To pause, HOLD must be brought low while SCK is low. The SO pin is in a high imped-
ance state during the time the part is paused, and transitions on the SI pins will be ignored. To resume communication, HOLD is
brought high, while SCK is low. (HOLD should be held high any time this function is not being used.) HOLD may be tied high
directly to VCC or tied to VCC through a resistor.
Document No. 2010, Rev. F
WP
WP
HOLD
HOLD
(SOIC)
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
Write Protect
(TSSOP) (BGA) Name
Pin
19
20
21
22
23
24
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Pin
C1
C2
C3
C4
D4
D3
D2
D1
B1
A1
A2
B2
B3
A3
A4
B4
E4
F4
F3
E3
E2
F2
F1
E1
HOLD
VCC
GND
SCK
R
R
R
R
R
R
R
R
R
WP
R
R
R
CS
NC
SO
NC
A1
A0
SI
W0
W1
W2
W3
H0
H1
H2
H3
L0
L1
L2
L3
Function
Supply Voltage
Low Reference Terminal
for Potentiometer 0
High Reference Terminal
for Potentiometer 0
Wiper Terminal for Potentiometer 0
Chip Select
Write Protection
Serial Input
Device Address
Low Reference Terminal
for Potentiometer 1
High Reference Terminal
for Potentiometer 1
Wiper Terminal for Potentiometer 1
Ground
No Connect
Wiper Terminal for
Potentiometer 2
High Reference Terminal
for Potentiometer 2
Low Reference Terminal
for Potentiometer 2
Bus Serial Clock
Hold
Serial Data Output
Device Address, LSB
Wiper Terminal for Potentiometer 3
High Reference Terminal
for Potentiometer 3
Low Reference Terminal
for Potentiometer 3
No Connect
2
PIN DESCRIPTIONS
SI:
SI is the serial data input pin. This pin is used to input
all opcodes, byte addresses and data to be written to
the CAT5401. Input data is latched on the rising edge
of the serial clock.
SO:
SO is the serial data output pin. This pin is used to
transfer data out of the CAT5401. During a read
cycle, data is shifted out on the falling edge of the
serial clock.
SCK:
SCK is the serial clock pin. This pin is used to
synchronize the communication between the
microcontroller and the CAT5401. Opcodes, byte
addresses or data present on the SI pin are latched
on the rising edge of the SCK. Data on the SO pin is
updated on the falling edge of the SCK.
A0, A1: Device Address Inputs
These inputs set the device address when address-
ing multiple devices. A total of four 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 CAT5401.
R
The four sets of R
terminal connections on a mechanical potentiometer.
R
The four R
of a mechanical potentiometer.
CS
CS
CS
CS
CS:
CS is the Chip select pin. CS low enables the
CAT5401 and CS high disables the CAT5401. CS high
takes the SO output pin to high impedance and forces
the devices into a Standby mode (unless an internal
write operation is underway). The CAT5401 draws
ZERO current in the Standby mode. A high to low
transition on CS is required prior to any sequence
being initiated. A low to high transition on CS after a
valid write sequence is what initiates an internal write
cycle.
H
W
, R
:
L
: Resistor End Points
Serial Input
Serial Output
Serial Clock
Wiper
Chip Select
W
pins are equivalent to the wiper terminal
H
and R
Characteristics subject to change without notice
L
pins are equivalent to the
© Catalyst Semiconductor, Inc.