Renesas QS3384PAG8

Overview

QS3384PAG8 from Renesas Electronics is a high-speed CMOS 10-bit bus switch with two independent 5-bit banks, 5 Ω ON resistance, zero propagation delay, and industrial temperature range (–40°C to +85°C). It enables bidirectional voltage translation (5V ↔ 3.3V), hot-swap isolation, and clock gating in embedded bus architectures.

For engineers reviewing the QS3384PAG8 datasheet, QS3384PAG8 pinout, QS3384PAG8 application, or QS3384PAG8 equivalent, key selection criteria include dual-enable control logic, sub-1 ns turn-on/turn-off delay, undershoot clamp diodes on all I/Os, and QSOP-24 green package compatibility with legacy IDT bus switch designs.

Technical Context

The QS3384PAG8 implements ten independent N-channel FET switches without inherent body diodes to V_CC, eliminating shoot-through risk during voltage translation. Each switch bank (A0–A4/B0–B4 and A5–A9/B5–B9) is controlled by dedicated BEA and BEB inputs, supporting asynchronous enable/disable sequencing.

It operates at 5 V ±5% with guaranteed logic thresholds (VIH ≥2 V, VIL ≤0.8 V), delivers <0.25 ns intrinsic propagation delay (RC-limited), and maintains <±1 μA off-state leakage across full temperature range - enabling low-noise, low-power bus isolation in mixed-voltage systems.

Key Specifications

Pinout & Package

QS3384PAG8 is packaged in a 24-pin QSOP (Quarter Size Outline Package), green RoHS-compliant, with 0.65 mm lead pitch and standard JEDEC MO-137AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and 74LVC1G3157GW, the QS3384PAG8 uniquely combines dual-bank enable control, integrated undershoot protection, and 5 Ω R_ON in a QSOP-24 industrial-grade package - making it optimal for robust, high-density bus isolation where reliability and timing fidelity are critical.

Availability

QS3384PAG8 is available at Aetrix Electronics and suitable for hot-swap backplanes, voltage-translated peripheral buses, and low-power clock gating applications requiring stable component supply across extended industrial lifecycles.

Supply support for QS3384PAG8 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, and IoT applications.

The QS3384PAG8 belongs to Renesas' QuickSwitch® bus switch product line, designed specifically for zero-delay, low-noise, mixed-voltage bus isolation in mission-critical industrial and communications infrastructure.

FAQ

What is the maximum operating voltage for QS3384PAG8?

The QS3384PAG8 supports an absolute maximum supply voltage (V_CC) of +7 V and DC input voltages from –0.5 V to +7 V on all A, B, and control pins. Its recommended operating range is 5 V ±5%, and it is characterized for reliable function across –40°C to +85°C. Exceeding absolute maximum ratings may cause permanent damage, as noted in the datasheet's stress rating section.

Does QS3384PAG8 support bidirectional voltage translation between 5V and 3.3V systems?

Yes, the QS3384PAG8 supports true bidirectional 5V ↔ 3.3V voltage translation without direction control pins. Its enhanced N-channel FET structure and lack of intrinsic body diode to V_CC prevent reverse current flow, while its 5 Ω typical ON resistance and TTL-compatible input thresholds ensure signal integrity and logic compatibility across both voltage domains.

How does the dual-enable architecture (BEA and BEB) improve system design with QS3384PAG8?

The dual-enable architecture in QS3384PAG8 allows independent control of two 5-bit switch banks (A0–A4/B0–B4 and A5–A9/B5–B9). This enables phased power-up, selective bus segmentation, and reduced simultaneous switching noise - critical for minimizing ground bounce and dynamic current spikes in dense PCB layouts and hot-swap applications.

Are undershoot clamp diodes present on all pins of QS3384PAG8?

Yes, the QS3384PAG8 integrates undershoot clamp diodes on all A, B, BEA, and BEB pins - protecting against –3 V transients with pulse width ≤20 ns. This feature is explicitly documented in the Absolute Maximum Ratings table and is essential for safe hot-plug operation in industrial backplanes and docking stations where cable-induced transients are common.

What package type and footprint does QS3384PAG8 use?

QS3384PAG8 uses a 24-pin QSOP (Quarter Size Outline Package) with green RoHS-compliant finish, designated by the "PAG" suffix in the ordering code. It follows JEDEC MO-137AC mechanical dimensions, has 0.65 mm lead pitch, and is compatible with standard surface-mount assembly processes - distinct from TSSOP variants which use different land patterns and thermal profiles.