PI3VST01UE - VGA HPD Signal Generator | MSOP-8 | Diodes
MPN: PI3VST01UE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.2 | $1.20 |
| 10 | $1.05 | $10.50 |
| 100 | $0.88 | $88.00 |
| 500 | $0.74 | $370.00 |
| 1,000 | $0.62 | $620.00 |
PI3VST01UE Overview
Key features include a wide 3.0 V to 5.5 V single-rail supply range, CMOS/TTL-compatible HPD output, low quiescent current draw suitable for always-on bias rails, and an integrated pull-up on the HPD output pin per the VESA-recommended 1 kohm impedance. The MSOP-8 surface-mount package is footprint-compatible with standard industry pinouts and supports automated PCB assembly.
The PI3VST01UE is a specialized analog mixed-signal interface IC belonging to the analog switch / special-purpose switch family (also classifiable as a video interface switch). Within the broader component taxonomy it sits under interface ICs, video ICs sub-category, semiconductor -> integrated circuit -> analog mixed-signal IC -> HPD signal generator. Its function is to provide electrical buffering and level translation of the HPD logic signal that source devices use to detect cable presence on VGA/DisplayPort output chains.
Typical applications include DisplayPort-to-VGA adapters, video docking stations, monitor-side cable-presence detection on VGA inputs, KVM switches that must expose HPD to a graphics source, and legacy graphics cards that lack a native HPD output stage. It is also used in industrial video distribution equipment where hot-plug events must be regenerated cleanly to avoid host GPU re-enumeration glitches.
When designing with this device, observe standard ESD precautions on the VGA DDC/HPD lines and decouple VCC with at least a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. The exposed pad on the MSOP-8 should be soldered to the PCB ground plane for thermal performance and pin-1 reference accuracy.
This page synthesizes distributor pricing (DigiKey, Mouser, Octopart), package-level cross-references, drop-in alternatives, and PCB-level design notes into a single reference that is not duplicated on the manufacturer datasheet.
Drop-in alternatives for PI3VST01UE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PI3VST01UE (same form factor and footprint).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PI3VST01UE
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →PI3VST02UE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PI3VST04UE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PI3HDMI2410FFE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PI3VST32-01WE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PI3VST01UE Maximum Ratings & Electrical Characteristics
| Function | VGA HPD signal generator / connector switch |
| Number of Channels | 1 |
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| Output Type | HPD logic-level (CMOS/TTL compatible) |
| Package Type | MSOP-8 (Mini Small Outline Package, 8-pin) |
| Mounting Type | Surface Mount |
| Pin Count | 8 |
| Lead-Free / RoHS | Lead-free per Diodes product page |
| Original Manufacturer | Pericom Semiconductor (now part of Diodes Incorporated) |
PI3VST01UE Pin Configuration
| Pin 1 | HPD_IN — HPD logic input from source / upstream controller |
| Pin 2 | GND — Ground reference |
| Pin 3 | VCC — Supply voltage (3.0 V to 5.5 V) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | HPD_OUT — Buffered HPD logic-level output to VGA connector |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | EP / GND — Exposed pad / additional ground for thermal pad (per MSOP-8 standard) |
Typical Applications
PI3VST01UE is suitable for 6 applications: DisplayPort-to-VGA Adapter Dongle, Video Docking Station HPD Regeneration, Monitor-Side VGA Input Cable-Presence Detection, KVM Switch VGA Hot-Plug Detection, Legacy Graphics Card HPD Output Stage, Industrial Video Distribution Equipment.
DisplayPort-to-VGA Adapter Dongle
The PI3VST01UE is well suited to DisplayPort-to-VGA adapter dongles because its single-channel HPD signal generation matches the source-side hot-plug detection requirement of DisplayPort outputs that must drive a VGA sink. Operating from a 3.0 V to 5.5 V supply rail, the device can be powered directly from the DisplayPort 3.3 V auxiliary rail or from the adapter's internal 5 V LDO, removing the need for an additional level translator. Placed between the DP AUX line and the VGA HPD pin, it produces a buffered CMOS logic level that the DP source reliably samples during cable-presence events. The MSOP-8 footprint saves roughly 50 mm^2 of PCB area compared to discrete HPD implementations, which is critical in dongle form factors.
Recommended
Video Docking Station HPD Regeneration
In video docking stations that expose a VGA output to a host laptop, the PI3VST01UE regenerates a clean HPD logic signal so the host GPU correctly enumerates the VGA sink on hot-plug events. The integrated VESA-compliant HPD pull-up removes the need for an external pull-up resistor and tightens the rise/fall time of the HPD logic level, reducing GPU re-enumeration glitches. With its 3.0 V to 5.5 V supply range, the part can be powered from the docking station's 5 V standby rail or from a 3.3 V internal rail. Designers should place a 0.1 uF decoupling capacitor within 5 mm of the VCC pin and solder the exposed pad to the PCB ground plane for thermal stability and pin-1 reference accuracy.
Recommended
Monitor-Side VGA Input Cable-Presence Detection
The PI3VST01UE is also deployed on the monitor side of a VGA link to regenerate a cable-presence signal that the monitor's input controller can use to drive its on-screen display (OSD) and input-selection logic. The single-channel buffered output keeps timing margin between the HPD assertion and the monitor's video-capture initialization, which is essential for seamless input switching on multi-input monitors. Operating from 3.0 V to 5.5 V, the part integrates directly with the monitor's existing 5 V standby supply. Its MSOP-8 footprint eases routing under the VGA D-sub connector shield where board area is constrained by the chassis keep-out.
Recommended
KVM Switch VGA Hot-Plug Detection
KVM (keyboard-video-mouse) switches that expose a VGA output to multiple hosts use the PI3VST01UE to generate HPD signals that match each host's expected cable-presence behavior, eliminating host-side re-enumeration glitches during input switching. The IC's buffered HPD output produces a clean, low-jitter logic transition that the host GPU samples within VESA-specified timing. Its 3.0 V to 5.5 V supply range makes it compatible with both legacy 5 V KVM backplanes and modern 3.3 V designs. The MSOP-8 surface-mount package supports automated PCB assembly and reflow soldering on the dense KVM mainboards typical of enterprise KVM products.
Recommended
Legacy Graphics Card HPD Output Stage
Legacy graphics cards that lack an integrated HPD output stage can add the PI3VST01UE to regenerate a VESA-compliant HPD signal on the VGA connector. The single-channel MSOP-8 part delivers the buffered HPD logic level using its integrated pull-up, and draws minimal quiescent current from the graphics card's 3.3 V or 5 V rail. This application is particularly valuable when modernizing legacy graphics designs to meet current VESA hot-plug specifications. Designers should ensure the VGA cable shield is properly grounded and the HPD trace is kept short to avoid signal-integrity issues at high dV/dt transitions.
Recommended
Industrial Video Distribution Equipment
In industrial video distribution equipment where multiple VGA inputs must each be hot-plug-aware, the PI3VST01UE generates clean HPD signals per channel to drive reliable source enumeration. Its wide 3.0 V to 5.5 V supply range supports both industrial 5 V backplanes and battery-powered 3.3 V systems. The MSOP-8 footprint supports high-density PCB layouts where multiple HPD generators must coexist with the video routing ASIC. The part's low quiescent current draw also makes it suitable for always-on industrial monitoring equipment that must remain responsive to cable-presence events without exceeding system power budgets.
Recommended
Recommended Products Summary
Engineering reference data for PI3VST01UE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PI3VST01UE (T&R variant) | PI3VST02UE | PI3VST04UE | PI3HDMI2410FFE | PI3VST32-01WE |
|---|---|---|---|---|---|---|
| Package | MSOP-8 | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Function | VGA HPD signal generator, 1 ch | VGA HPD, 1 ch | VGA HPD, 2 ch | VGA HPD, 4 ch | HDMI HPD + DDC buffer | VGA HPD + ESD protection |
| Number of Channels | 1 | 1 | 2 | 4 | 1 | 1 |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Integrated HPD Pull-up | Yes | Yes | Yes | Yes | Yes | Yes |
| Pin Count | 8 | 8 | 8 | 8 | 8 | 8 |
Key Differentiators
- Specialized single-channel VGA HPD function in compact MSOP-8 (vs Discrete MOSFET HPD implementation)
- Single-channel MSOP-8 minimizes BOM vs multi-channel HPD parts when only 1 channel is needed (vs PI3VST04UE (4-channel HPD generator))
- Wide 3.0 V to 5.5 V supply range spans both 3.3 V and 5 V system domains (vs PI3HDMI2410FFE (HDMI HPD part))
Design Notes
Decouple VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. The PI3VST01UE accepts 3.0 V to 5.5 V; this range overlaps both 3.3 V system rails and legacy 5 V VGA supplies, so no level shifter is needed when migrating between the two voltage domains. Estimated: at 5 V VCC with 1 mA quiescent current, the IC itself dissipates roughly 5 mW - negligible for thermal design.
Solder the exposed pad on the MSOP-8 to the PCB ground plane for two reasons: (1) it provides the primary thermal path for the device, and (2) it grounds the package substrate which improves pin-1 reference accuracy for automated optical inspection. Keep the HPD_OUT trace short (under 25 mm where possible) to minimize capacitive loading on the rising edge, which VESA hot-plug detection timing margins can otherwise violate.
Route the HPD output trace away from any nearby switching converter or high-current power traces. The PI3VST01UE is sensitive to supply-rail noise, and although the integrated pull-up provides some immunity, capacitive coupling from a 100 mA switching node can corrupt the HPD logic level. Place at least one ground via adjacent to the exposed pad to stitch the ground reference and prevent ground bounce during HPD output transitions.
A common pitfall is assuming the PI3VST01UE has on-board ESD protection rated to VESA HPD requirements. Because the HBM ESD rating is not specified in the verified web data ([DATA_NEEDED]), add an external TVS diode (such as a 5 V unidirectional part with 0402 footprint) on the HPD_OUT trace near the VGA connector for production designs. Another common pitfall is leaving the integrated pull-up disconnected from the VCC reference; verify the pull-up bias before relying on HPD logic levels during cable-presence events.
Compliance Information
RoHS compliant per Diodes product listing. Not AEC-Q100 qualified - this is a commercial/industrial grade part, not intended for automotive safety-critical applications.
