Diodes Incorporated PI74VCX16244AE

Overview

PI74VCX16244AE from Pericom Semiconductor is a 16-bit 3-state buffer/driver IC designed for memory address, clock, and bus interface applications in low-voltage systems. It supports true outputs, symmetrical active-low output-enable (OE) inputs, ±24mA balanced drive strength, 1.8V–3.6V supply operation, and 3.6V-tolerant I/Os. Used as four 4-bit, two 8-bit, or one 16-bit buffer in industrial embedded bus drivers.

For engineers reviewing the PI74VCX16244AE datasheet, PI74VCX16244AE pinout, PI74VCX16244AE application, or PI74VCX16244AE equivalent, key selection criteria include 3-state output control timing (tPLZ/tPHZ ≤ 5.3ns), I/O voltage tolerance (up to 3.6V), power-off high-impedance behavior, and TSSOP-48 packaging compatibility with dense PCB layouts.

Technical Context

The PI74VCX16244AE implements four independent 4-bit non-inverting buffer sections, each with dedicated active-low OE control (1OE–4OE). Each section drives true outputs without inversion and maintains high-impedance state when OE is HIGH, with internal design ensuring power-up/power-down safety via pull-up biasing of OE pins.

Its I/O-tolerant architecture allows interfacing between 1.8V logic domains and 3.3V or 3.6V buses without level shifters. Propagation delay skew across outputs is specified at ≤5.0ns, supporting synchronous multi-bit data transfer in memory and peripheral interfaces.

Key Specifications

Pinout & Package

Package: 48-pin TSSOP (A), 240-mil wide, Pb-free & Green compliant (JEDEC MO-153F/ED).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, the PI74VCX16244AE uniquely combines 1.8V–3.6V operation, certified noise suppression, and guaranteed power-off high-Z - making it optimal for industrial bus isolation and mixed-voltage memory expansion where reliability and signal integrity are critical.

Availability

PI74VCX16244AE is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and industrial bus interface applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI74VCX16244AE 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

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-speed interface, timing, and signal-integrity ICs for computing, communications, and industrial markets.

The PI74VCX family was engineered for low-voltage, high-density bus buffering with emphasis on noise control, live insertion, and I/O tolerance - targeting memory subsystems and FPGA-adjacent signal routing.

FAQ

What is the recommended pull-up resistor value for OE pins during power-up?

A minimum pull-up resistor value must be selected based on the driver's current-sinking capability to ensure OE remains HIGH during power ramp-up. For PI74VCX16244AE, a 10kΩ resistor to VCC is typically sufficient to guarantee high-impedance state at power-on, given its input leakage of ±0.5μA and OE input threshold of 0.2VDD (LOW) and 0.7VDD (HIGH).

Can PI74VCX16244AE interface a 1.8V FPGA core with a 3.3V ADC data bus?

Yes - its 3.6V-tolerant I/Os accept 3.3V inputs while operating from a 1.8V VDD supply, and its outputs swing rail-to-rail (0V to 1.8V) compatible with FPGA inputs. No level shifter is needed for input direction; for bidirectional use, external direction control is required since it is buffer-only (not transceiver).

Does PI74VCX16244AE support hot-swap in backplane applications?

Yes - it supports live insertion via power-off high-impedance I/Os and patented noise reduction circuitry. When VDD = 0V, all inputs and outputs enter high-Z state automatically, preventing bus contention or damage during card insertion/removal in powered backplanes.

How does the PI74VCX16244AE handle ground bounce in high-speed switching?

It uses patented noise reduction circuitry that limits output ground bounce (VOLP) to <0.6V and output undershoot (VOHV) to >–0.6V at VDD = 2.5V and TA = 25°C. This is achieved through controlled slew-rate design and internal decoupling, reducing EMI and improving signal integrity in dense PCB layouts.