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PDF X93254 Data sheet ( Hoja de datos )
| Número de pieza | X93254 | |
| Descripción | Dual Digitally Controlled Potentiometers | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
Data Sheet
March 1, 2005
X93254
FN8186.0
Dual Digitally Controlled Potentiometers
(XDCPs™)
FEATURES
• Dual solid-state potentiometers
• Independent Up/Down interfaces
• 32 wiper tap points per potentiometer
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 31 resistive elements per potentiometer
—Temperature compensated
—Maximum resistance tolerance of ± 30%
—Terminal voltage, 0 to VCC
• Low power CMOS
—VCC = 3V±10%
—Active current, 250µA max
—Standby current, 1µA max
• High reliability
—Endurance 200,000 data changes per bit
—Register data retention, 100 years
• RTOTAL value = 50kΩ
• 14-lead TSSOP package
DESCRIPTION
The Intersil X93254 is a dual digitally controlled poten-
tiometer (XDCP). The device consists of two resistor
arrays, wiper switches, a control section, and nonvola-
tile memory. The wiper positions are controlled by indi-
vidual Up/Down interfaces.
A potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switch-
ing network. The position of each wiper element is
controlled by a set of independent CS, U/D, and INC
inputs. The position of the wiper can be stored in non-
volatile memory and then be recalled upon a subse-
quent power-up operation.
Each potentiometer is connected as a two-terminal
variable resistor and can be used in a wide variety of
applications including:
– Bias and Gain control
– LCD Contrast Adjustment
www.DataSheet4U.com
BLOCK DIAGRAM
VCC (Supply Voltage)
Up/Down
(U/D1)
Increment
(INC1)
Device Select
(CS1)
Up/Down
(U/D2)
Increment
(INC2)
30K
30K
Control
and
Memory
Control
and
Memory
RH1
RL1
RH2
RL2
Device Select
(CS2)
VSS (Ground)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
X93254
A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified. In the
table, CS, INC, U/D, RH and RL are used to refer to either CS1 or CS2, etc.)
Symbol
Parameter
Min.
Limits
Typ.(6)
Max.
Unit
tCl
tlD
tDI
tlL
tlH
tlC
tCPH
tCPH
tCYC
tR, tF(6)
tR VCC(6)
tWR
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC Inactive to CS inactive
CS Deselect time (NO STORE)
CS Deselect time (STORE)
INC cycle time
INC input rise and fall time
VCC power-up rate
Store cycle
100 ns
100 ns
100 ns
1 µs
1 µs
1 µs
250 ns
10 ms
2 µs
500 µs
1
10,000
V/ms
5 10 ms
POWER-UP AND DOWN REQUIREMENTS
There are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potenti-
ometer pins provided that VCC is always more positive than or equal to VH and VL, i.e., VCC ≥ VH,VL. The VCC ramp
rate spec is always in effect.
A.C. TIMING (In the diagram, CS, INC, U/D, RH and RL are used to refer to either CS1 or CS2, etc.)
CS
tCI
INC
U/D
tCYC
tIL tIH
tIC
tID tDI
(Store)
tCPH
90% 90%
10%
tF tR
5 FN8186.0
March 1, 2005
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet X93254.PDF ] | |
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