Diodes Incorporated PI3B16244AE

Overview

PI3B16244AE from Pericom Semiconductor is a 3.3V, 16-bit, 4-port bus switch with near-zero propagation delay (≤2.5ns), 5Ω on-resistance, and industrial temperature range (–40°C to +85°C). It functions as a high-speed signal path selector in memory and data bus architectures, enabling dynamic routing between four independent 4-bit ports (A/B pairs) under individual enable control (1BE–4BE), used in FPGA I/O expansion and DDR2/DDR3 memory subsystems.

For engineers reviewing the PI3B16244AE datasheet, PI3B16244AE pinout, PI3B16244AE application, or PI3B16244AE equivalent, key selection criteria include its rail-to-rail logic-compatible control inputs (0–5.5V), low-noise switching without ground bounce, pin compatibility with 74-series 16244 drivers, and Pb-free TSSOP-48 packaging for high-density PCB layouts.

Technical Context

The PI3B16244AE implements four independent bidirectional analog switches per port, each controlled by a dedicated active-low enable (nBE). Its CMOS transmission-gate architecture ensures symmetrical on-resistance (<5Ω at VCC = 3.3V) and negligible propagation delay-limited only by RC time constant of switch resistance and load capacitance (e.g., 0.25ns for 50pF).

All 16 A/B signal paths operate with 3.0–3.6V supply, while control inputs tolerate 0–5.5V logic levels regardless of VCC. The device exhibits no DC current draw on A/B pins and draws only 10µA quiescent ICC, making it suitable for hot-swap and power-sequenced systems where supply ramping order must be preserved.

Key Specifications

Pinout & Package

PI3B16244AE is housed in a 48-pin thin shrink small-outline package (TSSOP-A), 240 mil wide, with 0.5mm lead pitch and exposed thermal pad (not electrically connected). Pin numbering follows standard JEDEC TSSOP convention, with GND and VCC distributed across multiple pins for low-impedance power delivery and noise suppression.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bus switch applications.

Compared with SN74CBT16244DGGR and 74LVC16244APAG, PI3B16244AE uniquely combines 5Ω RON, 5.5V-tolerant enables, and true bidirectional zero-delay switching-making it optimal for DDR memory routing and FPGA I/O consolidation where timing margin and voltage flexibility are critical.

Availability

PI3B16244AE is available at Aetrix Electronics and suitable for memory subsystem expansion, FPGA I/O multiplexing, and industrial hot-plug interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI3B16244AE 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 (acquired by Diodes Incorporated in 2016) specialized in high-speed interface and signal-integrity solutions for computing, communications, and industrial markets.

The PI3B16244AE belongs to Pericom's NanoSwitch™ family-designed specifically for low-latency, low-noise bus switching in DDR memory, FPGA, and ASIC interconnect applications where traditional buffers introduce unacceptable timing overhead.

FAQ

Can PI3B16244AE operate with 2.5V VCC?

No. The PI3B16244AE is specified only for 3.0V to 3.6V supply operation. At 2.5V, the internal pass transistors fail to fully enhance, resulting in elevated on-resistance (>15Ω), degraded noise margin, and potential functional failure. Designers requiring 2.5V compatibility should consider the PI3B3244 or similar 2.5V-optimized variants.

Does PI3B16244AE support hot-swap insertion while VCC is applied?

Yes-when VCC is stable and control inputs are held inactive (nBE = HIGH), the device remains in high-impedance state with <1µA leakage per A/B pin. However, per datasheet guidelines, VCC and GND must be established before applying any signal or control voltage to prevent latch-up or ESD damage during insertion.

What is the maximum capacitive load supported without signal degradation?

The PI3B16244AE maintains ≤2.5ns propagation delay with ≤50pF total load capacitance (including PCB trace, receiver input, and probe). For loads exceeding 50pF, rise/fall times degrade linearly with √(CL × RON); at 100pF, edge degradation is measurable but remains within 10% of original slew rate due to its 5Ω RON.

Is PI3B16244AE pin-compatible with PI3B16244A?

Yes-PI3B16244AE is a direct Pb-free and Green-compliant replacement for PI3B16244A, sharing identical pinout, electrical specifications, and thermal characteristics. The "E" suffix denotes RoHS-compliant materials and reflow profile compliance (J-STD-020D), with no functional or mechanical differences.