Diodes Incorporated PI5C16211AE

Overview

PI5C16211AE from Pericom Semiconductor is a 24-bit CMOS bus switch IC with dual 12-bit configurable channels, 5 Ω typical on-resistance at 4.5 V, near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.2 µA). It operates from 4.0–5.5 V over –40°C to +85°C and is used in notebook memory expansion buses for low-latency, low-power signal routing between memory controllers and SDRAM modules.

For engineers reviewing the PI5C16211AE datasheet, PI5C16211AE pinout, PI5C16211AE application, or PI5C16211AE equivalent, key selection criteria include verified ON-resistance matching (5–7 Ω at 30–64 mA), dual independent OE control for channel isolation, TVSOP/TSSOP/SSOP package compatibility, and industrial-temperature operation without level-shifting.

Technical Context

The PI5C16211AE implements two independent 12-bit bidirectional analog bus switches controlled by separate OE pins (1OE and 2OE), enabling selective channel enable/disable without crosstalk. Each channel connects corresponding A and B I/O pairs (e.g., 1A1 ↔ 1B1) via low-R_ON MOSFETs with no internal logic buffering.

Switching is purely resistive: propagation delay arises only from R_ON–C_L time constant (0.25 ns @ 50 pF), not gate delay. Input thresholds are TTL-compatible (V_IL = 0.8 V, V_IH = 2.0 V), and outputs tolerate –0.5 V to +7.0 V, supporting hot-swap and mixed-voltage system interfacing.

Key Specifications

Pinout & Package

PI5C16211AE is packaged in a Pb-free, green-compliant 56-pin TSSOP (240-mil wide, body width 6.0–6.2 mm, lead pitch 0.5 mm), with exposed pad omitted and thermal resistance θ_JA = 120°C/W per Pericom packaging documentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16211DGGR and 74FST16211MTD, PI5C16211AE offers lower R_ON, dual OE control for finer-grained bus partitioning, and guaranteed Pb-free TSSOP availability-critical for notebook OEMs managing supply chain compliance and thermal budget.

Availability

PI5C16211AE is available at Aetrix Electronics and suitable for notebook memory expansion, industrial PLC I/O modules, legacy bus multiplexing, and medical device signal routing requiring stable component supply across multi-year production cycles.

Supply support for PI5C16211AE 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 bus switch portfolio emphasizes low-R_ON, low-power, and industrial-temperature performance.

The PI5C16211AE belongs to Pericom's 5C-series CMOS bus switch family, designed specifically for zero-delay, low-power signal routing in space-constrained portable and industrial systems operating at 5 V.

FAQ

What is the maximum capacitive load the PI5C16211AE can drive while maintaining specified t_PD?

The datasheet specifies t_PD = 0.25 ns at C_L = 50 pF. This value scales linearly with load capacitance due to the R_ON–C_L time constant. At 100 pF, expected delay rises to ~0.5 ns. Driving loads >100 pF requires verifying signal integrity via IBIS simulation or bench measurement, as edge degradation may occur before timing violation.

Can PI5C16211AE operate with V_CC = 3.3 V?

No. Absolute maximum ratings and DC characteristics are specified only for V_CC = 4.0–5.5 V. At 3.3 V, R_ON increases significantly (>20 Ω), VIH/VIL thresholds become unreliable, and t_EN/t_DIS degrade beyond specification. For 3.3 V systems, consider PI3CHx series or SN74CBT3244 variants rated down to 2.5 V.

How does the PI5C16211AE handle input voltages exceeding V_CC?

The device includes clamp diodes to V_CC and GND. With V_CC = 5 V, inputs up to +7.0 V are permitted per absolute maximum ratings, but sustained overvoltage >V_CC + 0.5 V forward-biases the clamp diode, drawing current into V_CC. System design must limit such current to <10 mA to avoid V_CC rail disturbance or thermal stress.

Are the 1A/1B and 2A/2B ports electrically isolated when both OEs are high?

Yes. When either 1OE or 2OE is high, the corresponding 12-bit channel enters high-impedance state (Z), with off-capacitance C_IO(OFF) = 5.5 pF max. There is no internal connection between A and B sides in this state, and leakage current is <10 µA, ensuring robust signal isolation for bus arbitration and power domain separation.