Diodes Incorporated PI5C6800L

Overview

PI5C6800L from Pericom Semiconductor is a 10-bit CMOS bus switch with precharged B-port outputs, low on-state resistance (5 Ω typical), near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.2 µA). It operates from 4 V to 5.5 V supply, supports rail-to-rail logic inputs up to +5.5 V, and is used in notebook I/O isolation and hot-swap-capable data paths.

For engineers reviewing the PI5C6800L datasheet, PI5C6800L pinout, PI5C6800L application, or PI5C6800L equivalent, key selection criteria include on-resistance matching, precharge voltage compatibility (BIASV), B-port disable behavior, and TSSOP-24 thermal performance under 120 mA output load conditions.

Technical Context

The PI5C6800L implements a single-polarity, bidirectional analog switch array with independent A/B port connectivity controlled by an active-low ON input. Its precharge circuitry pulls the B-port to BIASV via ~10 kΩ equivalent resistance when disabled, preventing floating nodes during hot-swap events.

It uses standard CMOS process technology with rail-to-rail input tolerance, enabling interface between mixed-voltage domains (e.g., 3.3 V logic controlling 5 V data lines). Propagation delay is RC-limited (RON × CL) and specified at CL = 50 pF, not gate-delay-based.

Key Specifications

Pinout & Package

PI5C6800L is housed in a 24-pin 173-mil wide thin shrink small outline package (TSSOP-L), lead-free and RoHS-compliant. Pin spacing is 0.65 mm, body width 4.4 mm, and maximum height 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit bus switch applications.

Compared with SN74CBTD3384DWR and PI3CH400LE, the PI5C6800L uniquely combines 10-bit width, BIASV-programmable precharge, and 5 V tolerance-making it optimal for mixed-voltage notebook I/O expansion where hot-swap reliability and minimal external components are required.

Availability

PI5C6800L is available at Aetrix Electronics and suitable for notebook I/O expansion, PCIe lane gating, hot-swappable card readers, and legacy parallel port multiplexing requiring stable component supply and long-term lifecycle support.

Supply support for PI5C6800L 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 signal-integrity solutions, acquired by Diodes Incorporated in 2016; its portfolio emphasizes low-latency, low-power analog switches and logic for computing and communications.

The PI5C6800L belongs to Pericom's high-speed bus switch product line, designed specifically for voltage-domain isolation and hot-swap-capable data routing in portable and embedded computing platforms.

FAQ

Can PI5C6800L operate with VCC = 3.3 V?

No. The recommended operating VCC range is 4 V to 5.5 V per datasheet Section 2. Operation below 4 V is not characterized and may result in unreliable ON/OFF threshold behavior, increased RON, or failure to precharge B-port correctly. For 3.3 V systems, consider PI3CH400LE or SN74CB3Q3244.

What happens to B-port voltage when BIASV is left unconnected?

Leaving BIASV floating violates Absolute Maximum Ratings and risks latch-up or undefined precharge behavior. BIASV must be actively driven to a defined voltage (GND, VCC, or intermediate rail) to ensure predictable B-port idle state and avoid damage from leakage current paths.

Is PI5C6800L pin-compatible with PI5C6800Q?

Yes. Both share identical 24-pin functional pinout and logic behavior. The only difference is package: PI5C6800L uses 173-mil TSSOP (0.65 mm pitch), while PI5C6800Q uses 150-mil QSOP (1.27 mm pitch). PCB layout and schematic symbols must match the respective package dimensions.

Does PI5C6800L support bidirectional signal flow with different voltage levels on A and B ports?

No. While inputs tolerate rail-to-rail voltages, the switch itself is not level-translating. A and B ports must operate within the same VCC-referenced domain. Voltage translation requires external circuitry or dedicated level-shifters such as TXS0108E.