Diodes Incorporated PI3B16211KE

Overview

PI3B16211KE from Pericom Semiconductor is a 3.3V, 24-bit hot-insertion bus switch with 5 Ω on-resistance, 4.5 ns max switching time, and dual 12-bit configurable operation. It enables direct A-to-B signal routing in backplane and modular computing systems where live board replacement is required.

For engineers reviewing the PI3B16211KE datasheet, PI3B16211KE pinout, PI3B16211KE application, or PI3B16211KE equivalent, key selection criteria include hot-insertion support, low on-resistance matching, industrial temperature range (–40°C to +85°C), and TVSOP-56 package compatibility with high-density PCB layouts.

Technical Context

The PI3B16211KE implements two independent 12-bit bus switch banks, each controlled by separate output-enable inputs (1OE, 2OE). Its near-zero propagation delay arises from passive FET-based switching-no internal logic or buffering-making it transparent to signal edge rates.

Each switch channel operates bidirectionally with matched on-resistance (typ. 5 Ω at V_CC = 3.3 V), supporting TTL/CMOS-compatible voltage levels (–0.5 V to V_CC + 0.3 V) and 120 mA per pin absolute maximum current. Input/output capacitance is 0.7 pF (on) and 5.8 pF (off), minimizing signal integrity impact.

Key Specifications

Pinout & Package

PI3B16211KE is packaged in a Pb-free, green 56-pin thin very small outline package (TVSOP-K), 173-mil wide, with 0.4 mm pitch and 1.2 mm body height-optimized for compact, high-I/O-density designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 24-bit bus switch applications.

Compared with SN74CBT16212DGGR and PI3B3245LEX, the PI3B16211KE uniquely delivers 24-bit capacity in a 173-mil TVSOP package with guaranteed hot-insertion behavior at 3.3 V-critical for modular telecom and industrial systems requiring live serviceability.

Availability

PI3B16211KE is available at Aetrix Electronics and suitable for modular backplane systems, PCI hot-plug slots, and industrial I/O expansion modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI3B16211KE 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 specializing in high-speed interface, timing, and signal-integrity solutions before its acquisition by Diodes Incorporated in 2016. Its products target datacom, telecom, and industrial infrastructure markets.

The PI3B16211KE belongs to Pericom's BusSwitch™ family-designed specifically for hot-pluggable, low-distortion signal routing in modular computing and communications platforms where zero-delay transparency and robust power sequencing are mandatory.

FAQ

What is the maximum capacitive load the PI3B16211KE can drive while maintaining 4.5 ns switching performance?

The PI3B16211KE maintains its 4.5 ns max switching time with ≤50 pF total load capacitance, including PCB trace, connector, and destination input capacitance. At 50 pF, the RC time constant (5 Ω × 50 pF = 0.25 ns) contributes negligibly to system delay-actual timing is dominated by driver and receiver characteristics, not the switch itself.

Does PI3B16211KE require external pull-up or pull-down resistors on OE pins?

No. The 1OE and 2OE inputs have internal weak pull-downs (typ. 100 kΩ) ensuring default disable (high-Z) state at power-up. External resistors are unnecessary unless specific timing control or noise immunity beyond datasheet specs is required-e.g., in high-EMI environments where faster OE fall time is needed.

Can PI3B16211KE be used with 2.5 V logic signals?

Yes-within limits. While V_CC must be 3.0–3.6 V, the device supports input voltages from –0.5 V to V_CC + 0.3 V. A 2.5 V signal applied to A or B pins remains within safe operating range and passes through with <5 Ω resistance, provided the driven source can tolerate the 3.3 V referenced I/O structure and no DC current flows into clamped nodes.

How does PI3B16211KE handle partial power-down scenarios where V_CC drops below 2.5 V?

Below 2.5 V, the internal switch FETs cease conduction and enter high-impedance state-even if OE is asserted. This behavior is specified in the Absolute Maximum Ratings table: V_CC < 2.5 V disables all switching functions. No latch-up occurs, but signal pass-through is lost until V_CC returns to ≥3.0 V and OE is reasserted after stabilization.