Renesas QS3VH16212PAG

Overview

QS3VH16212PAG from Renesas Electronics (formerly IDT) is a 24-bit bus exchange high-bandwidth analog bus switch with dual 12-bit bidirectional data paths, operating at 2.3–3.6 V supply and supporting rail-to-rail 0–5 V signal switching. It features 4 Ω typical ON resistance, <0.2 ns propagation delay, 500 MHz bandwidth, and 5 V tolerance in both ON/OFF states. It enables hot-swappable Ethernet LAN switching and dynamic bus reconfiguration in industrial communications systems.

For engineers reviewing the QS3VH16212PAG datasheet, QS3VH16212PAG pinout, QS3VH16212PAG application, or QS3VH16212PAG equivalent, key selection criteria include its 24-bit bus exchange capability via S0–S2 control, TSSOP-56 package footprint, -40°C to +85°C industrial temperature range, and compatibility with LVTTL logic inputs and 5 V-tolerant I/Os.

Technical Context

The QS3VH16212PAG implements an N-channel FET-based analog switch architecture with no parasitic diode to V_CC, enabling true power-off isolation and zero DC path to supply or ground. Its function table defines eight configurable channel mappings-including dual 12-bit exchanges-controlled by three select lines (S0–S2), supporting both disconnect and simultaneous A1↔B1 + A2↔B2 modes.

It delivers rail-to-rail analog switching (0–5 V) with flat R_ON over voltage and temperature, low 4 pF I/O capacitance (ON state), and undershoot clamp diodes on all switch and control inputs. The device maintains high OFF-state impedance (>1 GΩ) and supports up to 20 MHz toggle frequency on control inputs under specified load conditions.

Key Specifications

Pinout & Package

QS3VH16212PAG is housed in a 56-pin Thin Shrink Small Outline Package (TSSOP), green RoHS-compliant, with 0.5 mm pitch and exposed thermal pad (not electrically connected). Pin layout supports symmetrical 12-bit A/B bus routing and dedicated S0–S2 select lines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus exchange switch applications.

Compared with SN74CBT16212DGGR and PI3CH480ELEX, the QS3VH16212PAG uniquely combines 24-bit programmable bus exchange, 500 MHz bandwidth, 5 V tolerance in both states, and industrial temperature rating - making it the sole option for high-reliability hot-swap Ethernet and ATM switching where signal fidelity and isolation integrity are non-negotiable.

Availability

QS3VH16212PAG is available at Aetrix Electronics and suitable for industrial Ethernet switches, telecom line cards, and hot-pluggable server modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for QS3VH16212PAG 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and infrastructure markets.

QS3VH16212PAG belongs to Renesas' QuickSwitch® analog bus switch product line, engineered specifically for high-speed, low-distortion signal routing in hot-swap-capable communications equipment and modular computing systems.

FAQ

What is the maximum operating frequency supported by the QS3VH16212PAG for control inputs?

The QS3VH16212PAG supports a maximum enable toggle frequency of 20 MHz at V_CC = 3.3 V, as specified in its switching characteristics table. This applies to S0–S2 control inputs driving the bus exchange function under defined load conditions (R_LOAD > 1 MΩ, no C_LOAD). The QS3VH16212PAG achieves this while maintaining sub-11 ns turn-on/turn-off delays, ensuring reliable high-speed configuration changes without metastability.

Does the QS3VH16212PAG require external pull-up or pull-down resistors on its S0–S2 control pins?

No, the QS3VH16212PAG does not require external biasing on S0–S2 pins because its control inputs are LVTTL-compatible with guaranteed VIH/VIL thresholds across the full V_CC range (2.3–3.6 V). The QS3VH16212PAG datasheet specifies VIH ≥ 2.0 V and VIL ≤ 0.8 V at V_CC = 3.3 V, allowing direct connection to FPGA or ASIC GPIO without additional components.

Can the QS3VH16212PAG safely interface a 5 V signal source while operating from a 2.5 V V_CC supply?

Yes, the QS3VH16212PAG is explicitly rated for 5 V tolerance on all I/O terminals (A/B ports and control inputs) in both ON and OFF states, regardless of V_CC level (2.3–3.6 V). This means a 5 V signal applied to any 1Ax, 1Bx, or Sx pin will not damage the QS3VH16212PAG or cause latch-up, enabling mixed-voltage system integration without level shifters.

What is the typical ON-resistance matching between channels in the QS3VH16212PAG?

The QS3VH16212PAG provides excellent R_ON matching between channels, with typical variation less than ±0.5 Ω across all 24 switch paths at V_CC = 3.3 V and 25°C. This tight matching ensures uniform signal attenuation and phase response across parallel data lanes - a critical requirement for QS3VH16212PAG applications such as Ethernet backplanes and ATM cell routing where skew must remain below 10 ps.

Is the QS3VH16212PAG pin-compatible with earlier IDT QS3VH16212 variants?

Yes, the QS3VH16212PAG is pin-compatible with all prior IDT-branded QS3VH16212 devices in TSSOP-56 packaging, including obsolete non-green versions. The "PAG" suffix denotes the RoHS-compliant green TSSOP variant, and Renesas confirms identical pinout, electrical behavior, and thermal characteristics - meaning existing PCB layouts designed for QS3VH16212PAG predecessors require no modifications.