X9252

Features:

• Quad Solid State Potentiometer
• 256 Wiper Tap Points-0.4% Resolution
• 2-Wire Serial Interface for Write, Read, and Transfer Operations of the Potentiometer
• Up/Down Interface for Individual Potentiometers
• Wiper Resistance: 40Ω Typical
• Non-Volatile Storage of Wiper Positions
• Power On Recall. Loads Saved Wiper Position on Power- Up.
• Standby Current < 20µA Max
• Maximum Wiper Current: 3mA
• VCC: 2.7V to 5.5V Operation
• 2.8kΩ,10kΩ, 50kΩ, 100kΩ Version of Total Pot Resistance
• Endurance: 100, 000 Data Changes per Bit per Register
• 100 yr. Data Retention
• 24 Ld TSSOP
• Pb-Free Plus Anneal Available (RoHS Compliant)




Pinout






Specifications

Junction Temperature under bias. . . . . . . . . -65°C to +135°C
Storage temperature . . . . . . . . . . . . . . . . . .-65°C to +150°C
Voltage at any digital interface pin
with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . . . -1V to +7V
V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1V to +7V
Voltage at any DCP pin with
respect to V_SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1V to V_CC
Lead temperature (soldering, 10s). . . . . . . . . . . . . . . . . 300°C
I_W (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6mA
CAUTION: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only; functional operation of the device (at these or any other conditions above those listed in the operational sections of this specification) is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Description

The X9252 integrates 4 digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit. The X9252 digitally controlled potentiometers are implemented using 255 resistive elements in a series array. Between each pair of elements are tap points connected to wiper terminals through switches. The position of each wiper on the array is controlled by the user through the Up/Down (U/D) or 2-wire bus interface. The wiper of each potentiometer has an associated volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers (DRs) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. At power-up, the X9252 recalls the contents of the default data registers DR00, DR10, DR20, DR30, to the corresponding WCR. Each DCP can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications including the programming of bias voltages, the implementation of ladder networks, and three resistor programmable networks.