Renesas QS32X2245Q2G8

Overview

QS32X2245Q2G8 from Renesas Electronics is a high-speed CMOS double-width bus switch with 16 bidirectional channels, 25Ω on-resistance, <1.25ns max propagation delay, and industrial temperature range (–40°C to +85°C); used for hot-swappable bus isolation and voltage translation between 5V and 3.3V domains.

For engineers reviewing the QS32X2245Q2G8 datasheet, QS32X2245Q2G8 pinout, QS32X2245Q2G8 application, or QS32X2245Q2G8 equivalent, key selection criteria include guaranteed TTL-compatible control inputs, undershoot clamp diodes on all I/Os, zero ground bounce, flow-through pinout for PCB routing efficiency, and dual OE control enabling independent switching of two 8-bit buses.

Technical Context

The QS32X2245Q2G8 implements dual 8-bit bidirectional bus switches using enhanced N-channel FETs with no inherent body diode to V_CC, eliminating parasitic conduction paths during voltage translation. Each channel features integrated 25Ω termination resistors to suppress reflection noise in high-speed digital interconnects.

Switching is controlled by two independent OE inputs (OE1, OE2), each enabling/disabling one 8-bit segment (A0–A7/B0–B7 or A8–A15/B8–B15) with t_PZL/t_PLZ ≤6.6ns/4.5ns and t_PLH/t_PHL ≤1.25ns under 50pF load. All control and data pins include undershoot clamp diodes and tolerate –0.5V to +7V DC input voltage.

Key Specifications

Pinout & Package

QS32X2245Q2G8 is packaged in a 40-pin QVSOP (Quad Flat No-Lead, Very Small Outline Package) with exposed thermal pad, optimized for high-density PCB layouts and thermal dissipation in industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3245APW and PI3CH400QE, the QS32X2245Q2G8 uniquely delivers dual independent OE control, integrated 25Ω termination, and 5V-tolerant I/O - making it the only option for industrial hot-swap and mixed-voltage bus isolation requiring segmented enable logic.

Availability

QS32X2245Q2G8 is available at Aetrix Electronics and suitable for hot-swapping, voltage translation, and bus isolation applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for QS32X2245Q2G8 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 connectivity solutions for automotive, industrial, infrastructure, and IoT markets.

The QS32X2245Q2G8 belongs to Renesas' QuickSwitch® bus switch product line, engineered specifically for high-speed, low-noise digital interconnect in industrial and communications systems requiring hot-plug capability and voltage domain bridging.

FAQ

What is the maximum operating voltage for QS32X2245Q2G8 control and data pins?

The QS32X2245Q2G8 supports DC input voltages from –0.5V to +7V on all terminals except V_CC, and –0.5V to +7V on V_CC itself. This 7V absolute maximum rating applies to both OE control inputs and A/B data pins, enabling robust operation in noisy industrial environments and safe hot-swap events. The device is designed for 5.0V ±5% nominal supply but tolerates overvoltage transients up to +7V without damage.

Does QS32X2245Q2G8 require external pull-up or pull-down resistors on OE pins?

No, QS32X2245Q2G8 does not require external pull-up or pull-down resistors on OE1 or OE2 pins. Its TTL-compatible inputs have guaranteed logic thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.0V) and extremely low input leakage (±0.01μA typical), allowing direct connection to microcontroller GPIOs or FPGA outputs. Internal design ensures stable high-impedance state when OE is un-driven, but best practice is to actively drive OE to defined logic levels in production systems.

Can QS32X2245Q2G8 be used for unidirectional signal routing?

Yes, QS32X2245Q2G8 supports unidirectional routing by driving only one side (e.g., A0–A15) as inputs and the other (B0–B15) as outputs, or vice versa. Its bidirectional FET structure allows current flow in either direction when enabled, and the absence of body diodes prevents unintended conduction. For strict unidirectional applications, OE control ensures clean enable/disable without latch-up risk, and the 23Ω R_ON remains consistent regardless of signal direction.

What is the thermal performance of QS32X2245Q2G8 in the QVSOP package?

QS32X2245Q2G8 in the 40-pin QVSOP package has a maximum power dissipation of 0.92W at TA = +85°C. With typical R_ON of 23Ω and worst-case I_OUT of 120mA per channel, power per switch remains below 330mW under full load. The package includes an exposed thermal pad that, when soldered to a copper plane, reduces junction-to-board thermal resistance significantly - enabling reliable operation in enclosed industrial enclosures without forced air cooling.

Is QS32X2245Q2G8 compliant with RoHS and REACH regulations?

Yes, QS32X2245Q2G8 is RoHS-compliant and REACH-conformant. The "Q2G" in the part number denotes green (lead-free) packaging, and the device uses halogen-free molding compound per IEC 61249-2-21. Renesas confirms compliance in its official PCN L0201-02 and public declarations. No exemptions apply, and the material composition meets EU Directive 2011/65/EU Annex II requirements for all homogeneous materials.