Diodes Incorporated PI3B16211AE

Overview

PI3B16211AE 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 channel configuration (1A/1B and 2A/2B), used in backplane interconnects for live card replacement in telecom line cards.

For engineers reviewing the PI3B16211AE datasheet, PI3B16211AE pinout, PI3B16211AE application, or PI3B16211AE equivalent, key selection criteria include hot-swap enable timing, V_CC range (3.0–3.6 V), industrial temperature support (–40°C to +85°C), and TSSOP-56 package compatibility with high-density PCB layouts.

Technical Context

The PI3B16211AE implements two independent 12-bit bidirectional analog bus switches controlled by separate OE pins (1OE and 2OE), enabling selective channel isolation during live insertion. Each switch exhibits near-zero propagation delay due to its low-R_ON MOSFET architecture and absence of internal logic gates.

It operates within a strict 3.0–3.6 V supply range and supports full rail-to-rail signal pass-through (V_IN = V_OUT) with no level translation. Input/output capacitance is 5.8 pF (off-state) and 0.7 pF (on-state), minimizing signal integrity degradation at high-speed data rates.

Key Specifications

Pinout & Package

PI3B16211AE is housed in a Pb-free, green-compliant 56-pin thin shrink small-outline package (TSSOP-A), 240-mil wide, with 0.5 mm pitch and exposed thermal pad (non-electrical).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16211DGGR and PI3CH4812LE, the PI3B16211AE uniquely combines true 24-bit dual-channel hot-swap capability, 5 Ω R_ON, and industrial temperature range in a single 3.3 V device-making it optimal for telecom and modular computing backplanes requiring zero-downtime maintenance.

Availability

PI3B16211AE is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and modular server backplanes requiring stable component supply and long-term lifecycle assurance.

Supply support for PI3B16211AE 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; its legacy portfolio remains widely deployed in communications and industrial systems.

The PI3B16211AE belongs to Pericom's BusSwitch™ family, engineered specifically for hot-pluggable parallel bus architectures in carrier-class networking and modular computing equipment.

FAQ

What is the maximum capacitive load the PI3B16211AE can drive while maintaining 4.5 ns switching?

The PI3B16211AE maintains its 4.5 ns max switching time with ≤50 pF total load capacitance, including PCB trace, connector, and downstream input capacitance. At 50 pF, the RC time constant is ≈0.25 ns (5 Ω × 50 pF), contributing negligibly to overall delay. Exceeding 50 pF increases rise/fall times proportionally and may violate timing margins in high-speed parallel buses.

Can PI3B16211AE be used with 2.5 V logic systems?

No. The PI3B16211AE requires V_CC between 3.0 V and 3.6 V for guaranteed operation; it is not characterized or specified for 2.5 V supply. Using 2.5 V risks incomplete turn-on of internal FETs, resulting in elevated R_ON, increased leakage, and potential failure to isolate during OE assertion. A dedicated 2.5 V bus switch such as the PI3CH4812LE should be selected instead.

How does the PI3B16211AE prevent bus contention during hot insertion?

Bus contention is prevented by asserting both 1OE and 2OE high (disabled) before card insertion, placing all 24 A/B channels in high-impedance state. As V_CC ramps, internal power-on reset ensures OE remains inactive until supply stabilizes. Only after system firmware asserts OE low does conduction begin-eliminating glitches or short-circuits between backplane and card traces during plug-in.

Is the PI3B16211AE pin-compatible with earlier Pericom bus switches like PI3B3244?

No. The PI3B16211AE uses a 56-pin TSSOP package with dual 12-bit channel mapping and two OE pins, whereas the PI3B3244 is a 48-pin device with different pinout, single OE, and 24-bit non-split architecture. Direct replacement would require PCB redesign. Migration requires validation of timing, thermal, and routing constraints-not just pin count matching.