X9313UST1 - 50kΩ 32-Tap Digital Potentiometer SOIC-8 | Renesas
Teilenummer: X9313UST1 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.28 | $128,00 |
| 500 | $1.05 | $525,00 |
| 1.000 | $0.86 | $860,00 |
X9313UST1 Übersicht
Background context: a digital potentiometer (often abbreviated "digi-pot") is a solid-state, semiconductor replacement for a mechanical potentiometer or trim pot. Digi-pots sit within the broader data-acquisition and analog-signal-conditioning hierarchy, alongside DACs and digital rheostats, and they belong to the Renesas XDCP™ family. Unlike mechanical pots, they are programmable by host firmware, never wear from mechanical actuation, and ship in surface-mount packages suitable for reflow soldering and dense PCB layouts.
Key features include a low 1 mA (typical) standby current, terminal voltages up to ±5 V across the resistor array, a 1.0% end-to-end resistance tolerance, and a wiper current rating up to approximately ±1 mA continuous, with peak surge handling to 10 mA. The 3-wire serial interface consumes only three MCU GPIO pins and is compatible with 5 V logic.
The internal architecture pairs a polysilicon resistor array with CMOS wiper switches and a non-volatile memory cell that latches the last wiper position before power-down. Three control inputs (CS, INC, U/D) implement a step-and-direction interface: CS enables the chip, INC clocks each tap step, and U/D selects up or down direction. Power-on recall places the wiper on the stored value with deterministic behavior.
Typical applications are audio volume/balance control, LCD contrast/brightness trimming, programmable voltage references, sensor calibration, and parameter-set storage where an MCU must hold a setting through power-down. Because the wiper retains state without external EEPROM, designers can eliminate a serial EEPROM and reduce BOM cost in many calibration circuits.
When designing with the X9313UST1, respect the maximum terminal voltage (±5 V across the resistor terminals) and verify that pin 8 is correctly identified in PCB layout - the part is widely second-sourced and a small number of look-alike 8-pin digi-pots swap the GND and VL pin positions. Add a 0.1 µF decoupling capacitor close to the supply pin and confirm that CS is not allowed to float.
This page combines the Renesas datasheet specifications, current distributor pricing, pin-compatible cross references, and practical layout notes not always covered in the original datasheet, providing engineers a single-page engineering brief for the X9313UST1.
Drop-in-Alternativen für X9313UST1 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
X9313US
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
X9313WS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
X9315UST1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
GS9030
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
X9314US
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
X9313UST1 Grenzwerte & elektrische Eigenschaften
| Manufacturer | Renesas Electronics (originally Intersil) |
| Product Type | Digitally Controlled Potentiometer (XDCP) |
| Number of Circuits | 1 |
| End-to-End Resistance | 50 kΩ |
| Number of Taps | 32 |
| Schnittstelle | 3-Wire Up/Down (U/D, INC, CS) |
| Terminal Voltage (RH-RL) | ±5 V (max) |
| Standby Current | 1 mA (typical) |
| Gehäuse | 8-SOIC (150 mil) |
| Montageart | Surface Mount |
| Non-Volatile Wiper Memory | Yes |
X9313UST1 Pin-Konfiguration
| Pin 1 | VH / RH — High terminal of resistor array |
| Pin 2 | VCC — Positive supply voltage |
| Pin 3 | VW / RW — Wiper terminal |
| Pin 4 | GND / VSS — Ground (substrate and logic reference) |
| Pin 5 | CS (or A1 on some variants) — Chip select, active low |
| Pin 6 | INC (or SCL) — Increment (step) clock input |
| Pin 7 | U/D (or A0) — Up/Down direction select |
| Pin 8 | VL / RL — Low terminal of resistor array |
Typische Anwendungen
X9313UST1 ist geeignet für 6 Anwendungs: Audio Volume and Balance Control, LCD Contrast and Brightness Trim, Programmable Voltage Reference Trim, Sensor Calibration and Gain Setting, Sensor Threshold Adjustment, Power Supply Output Voltage Adjustment.
Audio Volume and Balance Control
The X9313UST1's 50 kΩ end-to-end resistance and 32-tap wiper make it well suited for audio volume and balance control circuits in mid-volume consumer gear. Engineers commonly place the digi-pot in a series-shunt network with a 10 kΩ external resistor to shape a pseudo-logarithmic taper, matching how the human ear perceives loudness across roughly 60 dB of attenuation. The 3-wire (CS, INC, U/D) protocol uses only three MCU GPIO pins and the on-chip nonvolatile memory eliminates the need for a serial EEPROM, cutting BOM cost. Compared with a mechanical pot, the X9313UST1 has no contact wear, supports remote adjustment, and survives reflow soldering.
Empfohlen
LCD Contrast and Brightness Trim
The X9313UST1 is widely used to bias the contrast pin of character LCDs and to trim LED-backlight brightness for portable displays. Its 50 kΩ resistance provides a useful adjustment range when placed between VCC and the contrast node with a small series resistor of about 2-5 kΩ, allowing the MCU to sweep the display from fully white to fully dark over 32 distinct steps. The nonvolatile wiper memory holds the user-selected contrast across power cycles, so users do not re-adjust on every power-on. This application usually runs from a 3.3 V or 5 V rail, well within the part's terminal-voltage limit.
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Programmable Voltage Reference Trim
In precision analog circuits the X9313UST1 serves as a trim resistor for voltage references such as the TL431 or external reference ICs. It is placed at the feedback node of a low-noise reference amplifier, allowing an MCU to dial in a calibrated output voltage with fine 1.5 kΩ steps and lock the final setting into nonvolatile memory. This eliminates manual adjustment and supports factory calibration that can be recalled in the field. Because the digi-pot draws only 1 mA typical standby current, it is suitable for battery-powered test equipment where low quiescent draw is critical. Designers must respect the maximum ±5 V terminal-voltage limit across the resistor network.
Empfohlen
Sensor Calibration and Gain Setting
For sensors that require span or offset trim, the X9313UST1 replaces a 2-axis mechanical trim pot in industrial sensor conditioning circuits. The 32 taps across 50 kΩ give a 1.5 kΩ step size, sufficient for trimming off-PCB gain drift in op-amp sensor front-ends. The host MCU runs an automated calibration routine, writes the optimal tap position through the 3-wire interface, and stores it for power-on recall. This eliminates human adjustment, improves reproducibility, and reduces field failures from mechanical trim pot drift caused by shock or vibration in industrial environments.
Empfohlen
Sensor Threshold Adjustment
The X9313UST1 doubles as a digitally programmable threshold-setting resistor for comparator-based sensors such as battery monitor or photo-detector circuits. Place the wiper at the comparator reference node and toggle it via 3-wire commands to adjust the trip threshold in 32 steps. The nonvolatile memory ensures the threshold setting is robust against brown-outs and battery removal in battery-monitoring applications. Because the part runs from the same 5 V logic as the host MCU, designers can wire it directly to the comparator without level shifting.
Empfohlen
Power Supply Output Voltage Adjustment
In small switch-mode supplies and LDOs the X9313UST1 acts as a digital feedback resistor, allowing the host to write a regulated output voltage and store the result in nonvolatile memory for power-on recall. This is useful in configurable USB-PD sources, PoE modules, or factory-calibrated LED drivers where the output voltage must be locked after test. The 32-tap resolution limits precision to roughly 1 part in 32, which is appropriate for most consumer-grade supplies but not for sub-1% lab instrumentation. Designers should add a small series resistor at the wiper to limit inrush during tap changes.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für X9313UST1 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | X9313US | X9313WS | X9315UST1 | GS9030 |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Linear Systems |
| Package | 8-SOIC | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) |
| End-to-End Resistance | 50 kΩ | 50 kΩ | 10 kΩ | 50 kΩ | 50 kΩ |
| Number of Taps | 32 | 32 | 32 | 32 | 32 |
| Interface Type | 3-wire Up/Down | 3-wire Up/Down | 3-wire Up/Down | Pulse-mode (different) | 3-wire Up/Down |
| Non-Volatile Memory | Yes | Yes | Yes | Yes | Yes |
| Terminal Voltage Range | ±5 V | ±5 V | ±5 V | ±5 V | ±5 V |
| Operating Voltage | 5 V (typical, per family datasheet) | 5 V (typical) | 5 V (typical) | 5 V (typical) | 5 V (typical) |
| Step Size (Ω/tap) | ~1.5 kΩ per tap | ~1.5 kΩ per tap | ~300 Ω per tap | ~1.5 kΩ per tap | ~1.5 kΩ per tap |
Wichtigste Unterscheidungsmerkmale
- Non-volatile wiper memory at low standby current (vs. MCP41010)
- Single 3-wire GPIO interface consumes only 3 MCU pins (vs. AD5220)
- Drop-in compatible within the X9313 family and 8-SOIC (vs. GS9030)
Designhinweise
Decouple the VCC pin with a 0.1 µF ceramic capacitor placed within 5 mm of the X9313UST1 supply pin. The digi-pot draws roughly 1 mA typical standby and a small surge on each tap change, so a low-ESR ceramic is sufficient. Do not connect VCC before the logic rail has stabilized, otherwise the nonvolatile memory may load an indeterminate tap position. Use a controlled power-on sequence (logic-first, then analog) where the host MCU holds CS high during reset.
Route the three interface signals (CS, INC, U/D) on the same digital layer as the MCU and keep their traces short (<50 mm) to avoid glitches that would step the wiper unintentionally. Place the digi-pot close to the analog node it is trimming so that the resistor-network tracks are short and reject common-mode noise. Do not run switching converter or RF traces adjacent to the wiper or VL/RH terminals - the wiper is a high-impedance node sensitive to capacitive coupling.
Estimated: 50 kΩ divided by 32 taps equals ~1.56 kΩ per step (1.6 kΩ rounded). Designers must not exceed the ±5 V terminal-voltage limit across the resistor terminals (VH-VL), or the polysilicon switches can be damaged. CS must not float - tie it to a defined logic level either through the MCU or a pull-up resistor, because a floating CS line allows leakage into the chip and can cause phantom tap increments. Also verify that the alternate-source family member you select uses the same 3-wire protocol - some X9315 parts use a different pulse-mode timing and are not firmware-compatible.
The X9313UST1 dissipates at most a few milliwatts from its quiescent current in normal operation; thermal management is rarely a concern in 8-SOIC. Wiper current is a larger concern - the resistor array is rated for low continuous current and should not be used as a power-element shunt. For currents above the spec limit, route through an external buffer or FET rather than through the digi-pot terminals. Operating temperature limits should be verified against the device variant chosen (commercial or industrial grade).
Compliance-Informationen
Compliance status not present in the verified web data. Industrial/commercial temperature grade available; automotive AEC-Q100 grade not listed. Verify with Renesas product page for the latest RoHS/REACH declarations.
