Renesas 74CBTLV16800PAG

Overview

74CBTLV16800PAG from Integrated Device Technology (IDT) is a low-voltage 20-bit bi-directional bus switch with precharged outputs, designed for high-speed 3.3V bus isolation and live-insertion applications. It features dual 10-bit switches, 5Ω typical on-resistance, 2.3V–3.6V supply range, and BIASV-controlled precharge to minimize noise during hot-swap events.

For engineers reviewing the 74CBTLV16800PAG datasheet, 74CBTLV16800PAG pinout, 74CBTLV16800PAG application, or 74CBTLV16800PAG equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), OE-controlled high-impedance isolation, over-voltage tolerance, latch-up immunity (>100mA), and TSSOP-48 package compatibility with dense PCB layouts.

Technical Context

The 74CBTLV16800PAG implements two independent 10-bit bus switches, each controlled by a dedicated output-enable (OE) input. When OE is low, A-port connects directly to B-port with minimal propagation delay (≤0.25 ns); when OE is high, the switch opens and B-port is actively precharged to BIASV via an internal ~10-kΩ path.

Its architecture supports live-insertion in backplane and modular systems by maintaining B-port voltage stability during power sequencing. The device operates across 2.3V–3.6V VCC and accepts BIASV from 1.3V to VCC, enabling interoperability with mixed-voltage domains while meeting MIL-STD-883 ESD requirements (>2000V HBM).

Key Specifications

Pinout & Package

TSSOP-48 (Thin Shrink Small Outline Package), 0.5mm pitch, body size 12.5mm × 6.1mm, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV16800PAG and 74LVC16245APAG, the 74CBTLV16800PAG uniquely delivers true bi-directional zero-delay switching with user-configurable B-port precharge-critical for hot-swap and mixed-voltage isolation where direction signals are unavailable or timing-critical.

Availability

74CBTLV16800PAG is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and embedded computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74CBTLV16800PAG 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions.

The CBTLV family was developed specifically for low-voltage, high-speed bus switching in industrial and communications systems where signal integrity, power-off isolation, and live-insertion reliability are mandatory.

FAQ

What is the recommended BIASV voltage for 74CBTLV16800PAG when interfacing with 3.3V logic?

For 3.3V systems, BIASV should be set to 3.3V to match the B-port termination level and prevent DC offset during high-impedance state. The 74CBTLV16800PAG supports BIASV from 1.3V to VCC, and using VCC itself ensures optimal noise suppression during live-insertion events involving the 74CBTLV16800PAG.

Can 74CBTLV16800PAG operate with VCC = 2.5V while BIASV = 3.3V?

No - BIASV must not exceed VCC per absolute maximum ratings (BIASV ≤ VCC). The 74CBTLV16800PAG datasheet specifies BIASV range as 1.3V to VCC; applying 3.3V to BIASV while VCC = 2.5V violates this limit and risks damage. For mixed-voltage operation, ensure BIASV ≤ VCC and use external level-shifting if needed.

How does the 74CBTLV16800PAG achieve power-off isolation?

The 74CBTLV16800PAG achieves power-off isolation by maintaining IOFF ≤10µA when VCC = 0V and any port is biased to 0V or 3.6V. This is enabled by internal transistor cutoff design, ensuring no current flows between A and B ports - a key feature distinguishing the 74CBTLV16800PAG from standard CMOS switches that leak significantly at zero supply.

Is 74CBTLV16800PAG pin-compatible with older IDT CBTLV16245 devices?

No - the 74CBTLV16800PAG has 48 pins and dual-OE control for two 10-bit banks, whereas CBTLV16245 is a 48-pin 16-bit transceiver with direction control and no BIASV pin. Pin functions, pin count allocation, and internal architecture differ fundamentally; the 74CBTLV16800PAG is not a drop-in replacement for CBTLV16245.

What is the maximum capacitive load the 74CBTLV16800PAG can drive while maintaining specified tPD?

The 74CBTLV16800PAG propagation delay (tPD ≤0.25ns) is characterized with CL = 50pF at VCC = 3.3V. Driving loads beyond 50pF increases RC delay nonlinearly; for >50pF designs, verify timing margins empirically. The 74CBTLV16800PAG CIO(OFF) = 6.5pF and CI = 4pF minimize added capacitance, supporting high-fidelity signal routing in dense layouts.