Renesas QS3384PAG

Overview

QS3384PAG from Renesas Electronics is a high-speed CMOS 10-bit bus switch with two independent 5-bit banks, 5 Ω typical ON resistance, zero added propagation delay, and industrial temperature support (–40°C to +85°C). It enables bidirectional voltage translation (e.g., 5V ↔ 3.3V), hot-swap isolation, and clock gating in embedded control backplanes.

For engineers reviewing the QS3384PAG datasheet, QS3384PAG pinout, QS3384PAG application, or QS3384PAG equivalent, key selection criteria include dual enable control logic, sub-1 ns turn-on/turn-off timing, undershoot clamp diodes on all I/Os, and QSOP-24 green package compatibility with legacy IDT bus switch footprints.

Technical Context

The QS3384PAG implements ten independent N-channel FET switches without inherent body diodes to V_CC, eliminating shoot-through risk during voltage-level transitions. Each switch bank (A0–A4/B0–B4 and A5–A9/B5–B9) is controlled by dedicated BEA and BEB inputs, supporting asynchronous isolation of mixed-voltage domains.

It operates with TTL-compatible control thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), supports DC switch voltages up to 7 V, and maintains <±1 μA off-state leakage across –40°C to +85°C. Pass voltage is specified at 3.7–4.2 V when V_CC = 5 V and I_OUT = –5 μA.

Key Specifications

Pinout & Package

QS3384PAG is housed in a 24-pin Quarter Size Outline Package (QSOP), 3.9 mm × 8.7 mm body, 0.635 mm pitch, with exposed pad not present. Pin 12 is GND; Pin 13 is V_CC; BEA and BEB are dedicated active-low enables per bank.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3384CPWR and 74LVC1G3157GW,125, the QS3384PAG uniquely combines dual independent enables, integrated undershoot clamps on all pins, and guaranteed 5 Ω R_ON in a single 24-pin QSOP - making it optimal for industrial hot-swap and mixed-voltage bus isolation where reliability and layout simplicity are prioritized.

Availability

QS3384PAG is available at Aetrix Electronics and suitable for industrial backplane interfaces, voltage-translating data buses, and dynamic clock gating applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for QS3384PAG 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 applications.

The QS3384PAG belongs to Renesas' QuickSwitch® bus switch product line, engineered specifically for zero-delay, low-R_ON, hot-plug-capable signal routing in mixed-voltage industrial systems.

FAQ

What is the maximum allowable voltage on QS3384PAG I/O pins?

The QS3384PAG supports DC input voltages from –0.5 V to +7 V on all A, B, and control pins. This rating includes undershoot tolerance down to –0.5 V and overvoltage margin up to +7 V, enabling robust operation in noisy industrial environments. The device integrates clamp diodes to handle transient undershoot, but sustained voltages beyond this range may cause permanent damage.

Does QS3384PAG support true bidirectional signal flow without direction control?

Yes, QS3384PAG supports fully bidirectional signal flow on all ten channels (A0–A9 ↔ B0–B9) without direction pins or control logic. Its N-channel FET architecture provides symmetrical conduction regardless of signal source/sink orientation, making it ideal for data buses, JTAG, and clock distribution where polarity independence is required.

What is the operating supply voltage range for QS3384PAG?

The QS3384PAG is characterized for operation with V_CC = 5 V ±5% (4.75 V to 5.25 V) across the full industrial temperature range (–40°C to +85°C). While absolute maximum ratings allow up to +7 V, stable switching performance, R_ON, and timing parameters are guaranteed only within the 4.75–5.25 V range.

How does the dual-enable architecture of QS3384PAG improve system design?

The QS3384PAG's separate BEA and BEB inputs allow independent control of two 5-bit switch banks. This enables segmented bus isolation - for example, disabling only memory address lines while keeping data lines active - reducing power consumption and simplifying hot-swap sequencing without requiring additional logic gates or firmware overhead.

Is QS3384PAG pin-compatible with earlier IDT QS3384 variants?

Yes, QS3384PAG is pin-compatible with legacy IDT QS3384 devices in QSOP-24 packaging, including identical pinout, electrical behavior, and thermal profile. The "PAG" suffix denotes the green (lead-free) QSOP variant, maintaining full mechanical and functional interchangeability with prior non-green versions used in existing industrial designs.