CAT5112ZI-50-G ON Semiconductor, CAT5112ZI-50-G Datasheet - Page 2

• Manufacturer Part Number: CAT5112ZI-50-G
• Description: Digital Potentiometer ICs DPP NV 32 taps Up/Down w/Buf
• Manufacturer: ON Semiconductor

Specifications of CAT5112ZI-50-G

• Number Of Pots: Single
• Taps Per Pot: 32
• Resistance: 50 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (3-Wire)
• Operating Supply Voltage: 3.3 V, 5 V
• Supply Current: 200 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 6 V
• Supply Voltage (min): 2.5 V
• Package / Case: MSOP-8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CAT5112
PIN CONFIGURATION
PIN DESCRIPTION
INC
The INC
the up or down direction determined by the condition
of the U/D ¯ input.
U/D ¯ : Up/Down Control Input
The U/D ¯ input controls the direction of the wiper
movement. When in a high state and CS
high-to-low transition on INC
move one increment toward the R
a low state and CS
on INC
towards the R
R
R
not required that this terminal be connected to a
potential greater than the R
to the R
V
R
R
meter. Its position on the resistor array is controlled by
the control inputs, INC
R
R
not required that this terminal be connected to a
potential less than the R
the R
or go below ground, GND. R
interchangeable.
CS
The chip select input is used to activate the control
input of the CAT5112 and is active low. When in a
Doc. No. MD-2002 Rev. M
¯¯¯ : Increment Control Input
¯¯ : Chip Select
CC
H
H
WB
WB
L
L
: Low End Potentiometer Terminal
: High End Potentiometer Terminal
is the low end terminal of the potentiometer. It is
¯¯¯ will cause the wiper to move one increment
is the high end terminal of the potentiometer. It is
: Wiper Potentiometer Terminal (Buffered)
or go below ground, GND.
¯¯¯ input (on the falling edge) moves the wiper in
is the buffered wiper terminal of the potentio–
MSOP 8 Lead (Z)
L
SOIC 8 Lead (V)
PDIP 8-Lead (L)
GND 4
¯¯¯ 1
INC
U/D ¯ 2
terminal cannot exceed the supply voltage, V
R
H
H
terminal cannot exceed the supply voltage,
3
CAT
L
terminal.
¯¯ is low, any high-to-low transition
8 V
7 CS
6 R
5 R
¯¯¯ , U/D ¯ and CS
¯¯
CC
WB
L
H
¯¯¯ will cause the wiper to
terminal. Voltage applied to
L
terminal. Voltage applied
L
and R
¯¯ .
TSSOP 8 Lead (Y)
H
U/D ¯ 4
¯¯¯ 3
INC
V
CS
¯¯ 1
CC
terminal. When in
H
2
¯¯ is low, any
are electrically
CAT
8 R
7 R
6 GND
5 R
L
WB
H
CC
2
high state, activity on the INC
affect or change the position of the wiper.
DEVICE OPERATION
The CAT5112 operates like a digitally controlled
potentiometer with R
and low terminals and R
nical potentiometer's wiper. There are 32 available tap
positions including the resistor end points, R
There are 31 resistor elements connected in series
between the R
is connected to one of the 32 taps and controlled by
three inputs, INC
five-bit up/down counter whose output is decoded to
select the wiper position. The selected wiper position
can be stored in nonvolatile memory using the INC
and CS
With CS
respond to the U/D ¯ and INC
transitions on INC
wiper (depending on the state of the U/D ¯ input and
five-bit counter). The wiper, when at either fixed
terminal, acts like its mechanical equivalent and does
not move beyond the last position. The value of the
counter is stored in nonvolatile memory whenever CS
transitions HIGH while the INC
When the CAT5112 is powered-down, the last stored
wiper counter position is maintained in the nonvolatile
memory. When power is restored, the contents of the
memory are recalled and the counter is set to the
value stored.
With INC
and powered down without storing the current wiper
position in nonvolatile memory. This allows the system
to always power up to a preset value stored in non-
volatile memory.
PIN DESCRIPTIONS
Name Function
GND Ground
INC
U/D ¯
R
¯¯¯
V
CS
R
R
¯¯
¯¯ inputs.
WB
CC
H
L
¯¯¯ set low, the CAT5112 may be deselected
¯¯ set LOW the CAT5112 is selected and will
Increment Control
Up/Down Control
Potentiometer High Terminal
Buffered Wiper Terminal
Potentiometer Low Terminal
Chip Select
Supply Voltage
¯¯¯ , U/D ¯ and CS
H
¯¯¯ wil increment or decrement the
and R
H
L
and R
terminals. The wiper terminal
WB
Characteristics subject to change without notice
¯¯¯ and U/D ¯ inputs will not
¯¯¯ inputs. HIGH to LOW
¯¯ . These inputs control a
equivalent to the mecha–
¯¯¯ input is also HIGH.
L
equivalent to the high
© 2007 Catalyst Semiconductor, Inc.
H
and R
¯¯
L
.