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CAT5127 Schematic ( PDF Datasheet ) - Catalyst Semiconductor

Teilenummer CAT5127
Beschreibung (CAT5127 / CAT5129) Digitally Programmable Potentiometers
Hersteller Catalyst Semiconductor
Logo Catalyst Semiconductor Logo 




Gesamt 12 Seiten
CAT5127 Datasheet, Funktion
www.DataSheet4U.com
CAT5127, CAT5129
32-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
„ 32-position linear taper potentiometer
„ Non-volatile EEPROM wiper storage
„ Low standby current
„ Single supply operation: 2.5V – 5.5V
„ Increment Up/Down serial interface
„ Resistance values: 10k, 50kand 100k
„ CAT5127 in tiny 8 lead 2mmx2.5mm TDFN and
MSOP packages
„ CAT5129 in the 6 lead TSOT23 package
APPLICATION
„ Automated product calibration
„ Remote control adjustments
„ Offset, gain and zero control
„ Tamper-proof calibrations
„ Contrast, brightness and volume controls
„ Motor controls and feedback systems
„ Programmable analog functions
For Ordering Information details, see page 11.
FUNCTIONAL DIAGRAM
CAT5127
VCC
DESCRIPTION
The CAT5127/CAT5129 are single digitally program–
mable potentiometers (DPP™) designed as a electro–
nic replacement for mechanical potentiometers and
trim pots. Ideal for automated adjustments on high
volume production lines, they are also well suited for
applications where equipment requiring periodic
adjustment is either difficult to access or located in a
hazardous or remote environment.
The CAT5127 contains a 32-tap series resistor array
connected between two terminals RH and RL. The
CAT5129 contains a 32-tap series resistor array
connected between two terminals RH and GND. An
up/down counter and decoder that are controlled by
three input pins, determines which tap is connected to
the wiper. The wiper setting, stored in nonvolatile me–
mory, is not lost when the device is powered down
and is automatically reinstated when power is
returned. The wiper can be adjusted to test new
system values without effecting the stored setting.
Wiper-control of the CAT5127/CAT5129 is
accomplished with three input control pins, C¯¯S, U/D¯,
and I¯N¯C¯. The I¯N¯C¯ input increments the wiper in the
direction which is determined by the logic state of the
U/D¯ input. The C¯¯S input is used to select the device
and also store the wiper position prior to power down.
The devices are used as two-terminal variable
resistors. DPPs bring variability and programmability
to a wide variety of applications including control,
parameter adjustments, and signal processing.
CAT5129
VCC
(U/D)
(INC)
(CS)
Control
and
Memory
POR
RH
RL
(U/D)
(INC)
(CS)
Control
and
Memory
POR
RH
GND
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
GND
1 Doc. No. 2127 Rev. A






CAT5127 Datasheet, Funktion
www.DataSheet4U.com
CAT5127, CAT5129
AC TEST CONDITIONS
VCC Range
Input Pulse Levels
Input Rise and Fall Times
Input Reference Levels
2.5V VCC 5.5V
0.2VCC to 0.7VCC
10ns
0.5VCC
AC OPERATING CHARACTERISTICS
VCC = +2.5V to +5.5V, VH = VCC, VL = 0V, unless otherwise specified
Symbol Parameter
Min
tCI
tDI
tID
tIL
tIH
tIC
tCPH
tCPH
tIR
tCYC
tR, tF(2)
tPU(2)
C¯¯S to I¯N¯C¯ Setup
U/D¯ to I¯N¯C¯ Setup
U/D¯ to I¯N¯C¯ Hold
I¯N¯C¯ LOW Period
I¯N¯C¯ HIGH Period
I¯N¯C¯ Inactive to CS Inactive
C¯¯S Deselect Time (NO STORE)
C¯¯S Deselect Time (STORE)
I¯N¯C¯ to RH Change
I¯N¯C¯ Cycle Time
I¯N¯C¯ Input Rise and Fall Time
Power-up to Wiper Stable
100
50
100
250
250
1
100
10
1
tWR Store Cycle
Typ(1)
1
2
Max
5
500
1
5
Units
ns
ns
ns
ns
ns
µs
ns
ms
µs
µs
µs
ms
ms
A.C. TIMING
CS
tCI
INC
U/D
tCYC
tIL tIH
tDI tID
tIC
(store)
tCPH
90%
90%
10%
tF tR
tIR
RH
MI(3)
Notes:
(1) Typical values are for TA=25ºC and nominal supply voltage.
(2) This parameter is periodically sampled and not 100% tested.
(3) MI in the A.C. Timing diagram refers to the minimum incremental change in the W output due to a change in the wiper position.
Doc. No. 2127 Rev. A
6 © 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice

6 Page









CAT5127 pdf, datenblatt
www.DataSheet4U.com
REVISION HISTORY
Date
12/18/06
Rev. Reason
A Initial Issue
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
Beyond Memory™, DPP™, EZDim™, MiniPot™, and Quad-Mode™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor 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 Catalyst Semiconductor product could create a situation where
personal injury or death may occur.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled
"Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical
semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
2975 Stender Way
Santa Clara, CA 95054
Phone: 408.542.1000
Fax: 408.542.1200
www.catsemi.com
Document No: 2127
Revision:
A
Issue date: 12/18/06

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