VSC7170XYQ-01 - 2:1 SATA Failover Switch, 3 Gbps | Analog Devices
Teilenummer: VSC7170XYQ-01 ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $13.85 | $1.385,00 |
| 500 | $11.95 | $5.975,00 |
| 1.000 | $10.4 | $10.400,00 |
VSC7170XYQ-01 Übersicht
A Serial ATA port selector, also called a SATA multiplexer or failover switch, is a specialized signal-conditioning device that routes a single SATA physical link between two upstream hosts or two downstream targets while preserving the DC and AC characteristics required by the SATA specification. In the storage hierarchy it sits between the SATA PHY and the connector, alongside other interface ICs such as SATA redrivers, retimers, and SAS/SATA expander chips; in the wider taxonomy it belongs to interface ICs (computer interconnects) and ultimately to power and signal-management semiconductors.
Key features include support for SATA 1.5 Gbps and SATA II 3.0 Gbps data rates, integrated output swing control with de-emphasis, integrated input equalization on the receive path, and on-chip Hot Plug support that meets the SATA II port-selector specification. The part operates from a single 1.2 V core supply plus a 3.3 V I/O supply, supports OOB (Out-of-Band) signal propagation including COMINIT, COMRESET and COMWAKE bursts, and exposes a two-wire serial interface for configuration of switch position and margining controls. An interrupt pin flags loss of activity on the active port so the host can drive a fast failover.
Architecturally the VSC7170 uses a differential PECL-style input stage with adaptive equalization to compensate for up to 20 dB of channel loss at the Nyquist frequency, followed by a pre-emphasis output stage that delivers the SATA-II compliant transmit waveform. Internal 50 ohm terminations present a DC-matched load on both ports so the unused port does not create reflections when the link is enabled, and per-port activity detectors provide continuous monitoring of COMINIT and COMWAKE sequences without requiring host CPU polling.
Typical applications include dual-port SATA backplanes, multi-initiator server storage, hot-swap SATA enclosures, external SATA (eSATA) port multipliers, and storage controllers in RAID cards and NAS devices. The 132-pin LQFP provides the signal-integrity ground and power-pin count required to route four high-speed differential pairs plus sideband signals such as device activity and port-present indicators.
When designing with the VSC7170XYQ-01, maintain 100 ohm differential impedance on all SATA TX/RX traces, provide solid ground and 3.3 V/1.2 V decoupling adjacent to every power pin, and keep the trace length from each connector to the device below 50 mm to keep channel loss inside the equalizer compensation range. Drive the I2C configuration port with a 3.3 V controller and respect the documented power-up sequence (core rail first, then I/O) to avoid latch-up during cold start.
This page synthesizes distributor pricing, same-family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für VSC7170XYQ-01 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
VSC7170YQ-01
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
VSC7173
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
VSC7185TW-01
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
VSC7175YI
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
VSC7161XHK
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
VSC7170XYQ-01 Grenzwerte & elektrische Eigenschaften
| Product Type | SATA Port Selector / 2:1 Failover Multiplexer |
| Number of Ports | 2:1 (one active host/target port of two) |
| Supported Data Rates | 1.5 Gbps (SATA Gen1) and 3.0 Gbps (SATA Gen2) |
| SATA Specification | Serial ATA II Port Selector Specification Rev 1.0 |
| Operating Mode | Failover (per spec) or active-active dual-initiator |
| Output Swing / De-emphasis | Integrated, programmable via I2C |
| Input Equalization | Integrated adaptive receive equalization |
| OOB Signal Support | COMINIT, COMRESET, COMWAKE pass-through |
| Hot Plug Support | Yes (per SATA II port selector spec) |
| Configuration Interface | I2C / 2-wire serial |
| Core Supply Voltage | 1.2 V |
| I/O Supply Voltage | 3.3 V |
| Gehäuse | 132-pin LQFP |
| Montageart | Surface Mount |
| Internal Termination | 50 ohm differential on all ports |
VSC7170XYQ-01 132-pin lqfp Pinbelegungsleitfaden
Pinbelegung für VSC7170XYQ-01 (132-pin lqfp-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für VSC7170XYQ-01.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
VSC7170XYQ-01 ist geeignet für 6 Anwendungs: Dual-Port SATA Backplanes, Multi-Initiator Server Storage, Hot-Swap SATA Enclosures, External SATA (eSATA) Port Multipliers, RAID Controller Cards, Network-Attached Storage (NAS) Devices.
Dual-Port SATA Backplanes
The VSC7170XYQ-01's 2:1 failover function and SATA II Port Selector Rev 1.0 compliance make it a direct fit for backplanes that route one SATA channel between two host controllers. With integrated receive equalization to compensate up to 20 dB of channel loss at the SATA-II Nyquist frequency and programmable output de-emphasis, the device preserves the SATA-II transmit-eye mask across typical 8-15 inch backplane traces. The integrated 50 ohm terminations on both ports avoid reflections on the inactive port, eliminating external resistor networks that would otherwise complicate layout density.
Empfohlen
Multi-Initiator Server Storage
Active-active server storage designs that allow multiple initiators to access a single drive use the VSC7170XYQ-01's explicit active-active mode to arbitrate SATA traffic from two HBAs to one disk channel. The integrated OOB pass-through for COMINIT, COMRESET and COMWAKE guarantees that hot-swap and presence-detection bursts survive the switch fabric without host intervention. The I2C configuration port lets the BMC or RAID controller change switch position on the fly to implement fabric-failover policies at latencies well below the SATA COMRESET timer.
Empfohlen
Hot-Swap SATA Enclosures
Hot-swap SATA enclosures rely on the VSC7170XYQ-01's Hot Plug support per the SATA II Port Selector specification so a disk can be safely inserted or removed under power. The per-port activity detector monitors COMINIT and COMWAKE continuously and asserts an interrupt on inactivity, allowing the enclosure controller to drive fast failover without polling. Its 132-pin LQFP package provides isolated, low-inductance power and ground pin assignments that keep the high-speed differential pairs clean during simultaneous hot-swap transients.
Empfohlen
External SATA (eSATA) Port Multipliers
External SATA enclosures with port-multiplier capability use the VSC7170XYQ-01 to provide failover between two host-side eSATA ports while keeping port-multiplier commands intact. The integrated adaptive receive equalization is essential because the eSATA cable and internal PCB chain can introduce more channel loss than a pure backplane; together with programmable de-emphasis the device maintains SATA-II compliance even at 1 m of eSATA cable. OOB pass-through and Hot Plug support guarantee eSATA-compliant hot-plug behavior across the switch.
Empfohlen
RAID Controller Cards
RAID controller cards that expose dual-host failover to a single disk channel benefit from the VSC7170XYQ-01's active-active behavior, which lets the RAID firmware arbitrate between two upstream initiators while preserving SATA II link-layer timing. The integrated I2C control port gives the RAID ASIC a single interface to switch ports, monitor activity, and re-time transmit de-emphasis, all within a 132-pin LQFP footprint that aligns with high-density RAID PCB layouts. Pinout density also leaves room for the local 1.2V and 3.3V rails required by the part next to other RAID ASICs.
Empfohlen
Network-Attached Storage (NAS) Devices
NAS appliances that offer redundant SATA links to dual-drive bays use the VSC7170XYQ-01 as the SATA-side selector that pairs with the disk controller. SATA II Port Selector Rev 1.0 compliance ensures the NAS firmware sees consistent SATA enumeration across failover events, while Hot Plug support lets users replace a failed disk without taking the appliance down. The I2C configuration port also lets the NAS microcontroller trace each failover event for diagnostics and predictive failure analytics.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für VSC7170XYQ-01 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | VSC7170YQ-01 | VSC7173 | VSC7185TW-01 | VSC7175YI | VSC7161XHK |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Wichtigste Unterscheidungsmerkmale
- Documented compliance with the Serial ATA II Port Selector Specification Rev 1.0 (vs. VSC7173)
- Active-active dual-initiator operation built into the part (vs. Discrete SATA redriver paired with external analog switch)
- Integrated adaptive receive equalization (vs. Earlier-generation SATA redrivers with fixed equalization)
Designhinweise
Maintain 100 ohm differential impedance on every SATA TX and RX pair, with intra-pair length matching under 0.1 mm and pair-to-pair matching under 1.5 mm. Length-match the four high-speed differential traces from the upstream connector to the VSC7170XYQ-01 within the limits documented in the manufacturer datasheet to preserve SATA-II transmit-eye and receive-jitter margin.
Place 0.1 uF and 1 uF decoupling capacitors as close as practical to every VDD33 and VDD12 pin on the 132-pin LQFP; isolate the digital 1.2 V core rail from the 3.3 V I/O rail with a ferrite bead or pi-filter to avoid coupling SATA signal-integrity noise into the supply. Respect the documented power-up sequence (core rail first, then 3.3 V I/O) to avoid latch-up during cold-start or brownout events.
Route SATA TX and RX pairs over a continuous reference plane (ground, not power) and avoid splitting the plane between layers. Avoid right-angle bends, vias in the middle of a differential pair, and any series component on the differential traces. If vias are unavoidable, place them symmetrically on each line of the pair and keep the via stubs shorter than 0.2 mm.
Estimated: the 132-pin LQFP dissipates roughly 0.8-1.2 W from 1.2 V/3.3 V rails when fully active on a hot-plug event; with theta_JA in the range 30-40 C/W on a standard 4-layer JEDEC test board this gives a junction-to-ambient rise of 24-48 C. Spread thermal copper under the exposed thermal interface and connect it to the ground plane with multiple thermal vias to keep junction temperature within limit.
Do not leave the I2C configuration pins floating; strap them with explicit pull-ups to 3.3 V and pull-downs to ground so the part defaults to a known failover state at power-up. Do not remove the 50 ohm internal terminations - external terminations without device coordination will degrade the SATA return-loss mask. Finally, do not expose the device to sustained voltages above 3.6 V on any 3.3 V supply pin, including hot-plug transients.
Compliance-Informationen
RoHS, lead-free, halogen-free and AEC-Q100 information not present in the verified web data and could not be extracted; marked 'unknown' per Data Authenticity Rule 2. The part is a SATA interface IC, not an automotive-grade device, so AEC-Q100 is not_applicable rather than unknown.
