Diodes Incorporated PI5C16244A

Overview

PI5C16244A from Pericom Semiconductor is a 16-bit, 4-port CMOS bus switch with near-zero propagation delay (0.25 ns), 5 Ω typical on-resistance, and ultra-low quiescent current (0.2 µA typical). It functions as a bidirectional signal path selector for high-speed digital buses in notebook and industrial systems, enabling direct A↔B bus connection without added timing skew or ground bounce.

For engineers reviewing the PI5C16244A datasheet, PI5C16244A pinout, PI5C16244A application, or PI5C16244A equivalent, key selection criteria include its 5 Ω R_ON, 0.25 ns t_PLH/t_PHL, 48-pin TSSOP package, –40°C to +85°C operating range, and pin compatibility with 74-series 16244 drivers.

Technical Context

The PI5C16244A implements four independent 4-bit bidirectional analog switches controlled by active-low enable signals (1BE–4BE), each connecting corresponding A- and B-side I/O pins (e.g., 1A0↔1B0). Its MOSFET-based switch architecture provides rail-to-rail signal pass-through with no level-shifting or logic interpretation.

Each switch exhibits <5 Ω on-resistance at V_CC = 4.5 V and 48 mA, resulting in sub-nanosecond RC time constants (<0.25 ns with 50 pF load). Propagation delay is dominated solely by external driver/load interaction-not internal logic-making it suitable for transparent signal routing in DDR, PCI, and parallel bus architectures.

Key Specifications

Pinout & Package

PI5C16244A is housed in a 48-pin, 240 mil-wide plastic TSSOP (Thin Shrink Small Outline Package) with exposed thermal pad option (not specified in J-column data). Pin numbering follows JEDEC MO-153 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16244 and 74LVC16244APAG, PI5C16244A delivers lower on-resistance, lower quiescent current, and true bidirectional transparency-making it optimal for zero-delay signal routing where analog switch behavior is essential.

Availability

PI5C16244A is available at Aetrix Electronics and suitable for notebook computing, industrial PLC backplanes, automotive infotainment data sharing, and PCI Express slot multiplexing requiring stable component supply and long-term manufacturability.

Supply support for PI5C16244A 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 was a fabless provider of high-speed interface and timing solutions, acquired by Diodes Incorporated in 2016; legacy products maintain full datasheet compliance and manufacturing continuity.

The PI5C16244A belongs to Pericom's high-speed analog bus switch product line, designed specifically for transparent, low-latency signal routing in portable and industrial digital systems where traditional logic buffers introduce unacceptable delay or power overhead.

FAQ

What is the maximum capacitive load the PI5C16244A can drive while maintaining 0.25 ns propagation delay?

The 0.25 ns propagation delay specification assumes a 50 pF load with 500 Ω termination. With increasing load capacitance, delay rises linearly per the RC time constant (R_ON × C_L). At 100 pF, expected delay increases to ~0.5 ns. For loads >100 pF, signal integrity must be verified using IBIS models or bench measurement under actual board conditions.

Can PI5C16244A operate reliably at 3.3 V supply while interfacing with 5 V logic signals?

Yes. The device supports V_CC from 4.5 V to 5.5 V per datasheet, but absolute maximum ratings allow inputs up to +7.0 V regardless of V_CC. When operated at 3.3 V, VIH/VIL thresholds shift proportionally; however, the datasheet specifies guaranteed logic levels only at V_CC = 5 V ±10%. For 3.3 V operation, verify VIH ≥ 2.0 V and VIL ≤ 0.8 V at system level.

How does the PI5C16244A handle simultaneous switching of multiple ports?

Each of the four 4-bit ports operates independently with dedicated enable pins (1BE–4BE). Simultaneous switching causes no internal contention, but transient supply current spikes aggregate-peak ICC may reach 4 × 2.5 mA = 10 mA during full-port toggling. Use local 100 nF ceramic decoupling at each VCC pin and observe layout guidelines for ground plane integrity.

Is the PI5C16244A pinout identical across TSSOP (A), BQSOP (B), and SSOP (V) packages?

Yes. All three packages (A/B/V) share identical pin numbering and function assignment per the datasheet pin configuration diagram. Mechanical dimensions differ, but electrical connectivity and PCB footprint compatibility are maintained only within the same package family-TSSOP-A requires different land pattern than BQSOP-B or SSOP-V.