Renesas X9111TV14IZ

Overview

X9111TV14IZ from Intersil is a single-supply, low-power, 1024-tap digitally controlled potentiometer (XDCP™) with SPI interface, 100kΩ end-to-end resistance, ±20% tolerance, and 14-lead TSSOP package. It functions as a 3-terminal potentiometer or 2-terminal variable resistor for precision analog trimming in voltage regulators, amplifier gain control, and sensor signal conditioning.

For engineers reviewing the X9111TV14IZ datasheet, X9111TV14IZ pinout, X9111TV14IZ application, or X9111TV14IZ equivalent, this page delivers verified technical context, real-world circuit roles, confirmed SPI timing (2.5 MHz max), wiper resistance (40Ω typ at 5V), nonvolatile data register endurance (100,000 cycles), and power-up recall behavior - all specific to the industrial-grade (-40°C to +85°C) X9111TV14IZ variant.

Technical Context

The X9111TV14IZ implements a 1023-element CMOS resistor array with decoded 10-bit Wiper Counter Register (WCR) controlling one of 1024 tap switches. Its SPI interface complies with standard hardware conventions: SI latched on SCK rising edge, SO clocked out on falling edge, and CS/HOLD/ WP enabling device selection and write protection.

It integrates four 10-bit nonvolatile Data Registers (DR0–DR3) for persistent storage of wiper positions, with DR0 automatically loaded to WCR at power-up. The device supports volatile wiper updates (tWRL ≤10 µs), nonvolatile register writes (tWR ≤10 ms), and status monitoring via dedicated WIP bit.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm width), RoHS-compliant, M14.173 drawing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with AD5241BRMZ10 and MCP41010-I/P, the X9111TV14IZ provides superior resolution, integrated nonvolatile storage for multiple calibration points, hardware write protection, and guaranteed power-on state - making it optimal for industrial systems requiring autonomous, tamper-resistant analog tuning.

Availability

X9111TV14IZ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and embedded audio control requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for X9111TV14IZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil Corporation is a precision analog and power management IC specialist, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9111 product line delivers digitally programmable analog front-ends for calibration-critical applications including test equipment, medical devices, and factory automation systems.

FAQ

What is the operating temperature range for the X9111TV14IZ?

The X9111TV14IZ is rated for industrial operation from -40°C to +85°C, as confirmed by the Ordering Information table in FN8159 Rev 5.00. This range applies specifically to the "X9111TV14IZ" variant, distinguishing it from commercial-grade versions like X9111TV14Z (0°C to +70°C). The device maintains full specification compliance-including 100kΩ resistance tolerance, 40Ω wiper resistance, and 2.5 MHz SPI timing-across this entire range.

Does the X9111TV14IZ retain its wiper position after power loss?

The X9111TV14IZ does not retain its active wiper position in the volatile Wiper Counter Register (WCR) after power loss. However, it loads the contents of nonvolatile Data Register 0 (DR0) into the WCR at power-up, ensuring a known, user-programmable startup state. DR0 and three additional nonvolatile registers (DR1–DR3) each support 100,000 write cycles and 100-year data retention, making X9111TV14IZ suitable for systems requiring repeatable boot behavior without host intervention.

Can the X9111TV14IZ be used as a 2-terminal variable resistor?

Yes, the X9111TV14IZ can be configured as a 2-terminal variable resistor by connecting either RH or RL to RW, effectively using only two pins. The datasheet explicitly states this capability on page 1, and Figure 12 shows the three-terminal potentiometer configuration while Figure 13 illustrates the two-terminal variable resistor implementation. This mode is commonly applied in current-setting or gain-control circuits where only one adjustable resistance node is required.

What is the maximum SPI clock frequency supported by the X9111TV14IZ?

The X9111TV14IZ supports a maximum SPI clock frequency of 2.5 MHz, as specified in the AC Timing table (Page 12 of FN8159 Rev 5.00). This value is guaranteed across the full industrial temperature range (-40°C to +85°C) and VCC range (2.7V to 5.5V). Exceeding 2.5 MHz may result in unreliable opcode decoding or register access, particularly during nonvolatile writes which require internal high-voltage generation timed to the clock.

How does the hardware write protect (WP) pin function on the X9111TV14IZ?

The WP pin on the X9111TV14IZ is an active-low hardware lock that prevents nonvolatile writes to the four Data Registers (DR0–DR3). When WP is held LOW, commands to write or transfer data into these registers are ignored, though volatile WCR updates and reads remain fully operational. This feature protects factory-calibrated settings from accidental overwrite during field firmware updates or system debugging, and is distinct from software-based protection schemes requiring command execution.