Renesas 74CBTLV16211PAG8

Overview

74CBTLV16211PAG8 from Renesas Electronics is a low-voltage 24-bit bus switch operating as either a single 24-bit or dual 12-bit bi-directional switch, featuring 5Ω typical ON-resistance, <0.25 ns propagation delay, and operation across 2.3V–3.6V supply with industrial temperature range (–40°C to +85°C), used for high-speed 3.3V bus isolation in memory and peripheral interconnects.

For engineers reviewing the 74CBTLV16211PAG8 datasheet, 74CBTLV16211PAG8 pinout, 74CBTLV16211PAG8 application, or 74CBTLV16211PAG8 equivalent, key selection criteria include verified bi-directional switching performance, power-off isolation behavior, over-voltage tolerance up to 4.6V, latch-up immunity >100mA, and TSSOP-56 package compatibility with high-density PCB layouts.

Technical Context

The 74CBTLV16211PAG8 implements two independent 12-bit bus switches controlled by separate active-low OE inputs (1OE and 2OE), enabling selective isolation of A/B port pairs without signal directionality constraints. Each switch exhibits near-zero propagation skew (<0.25 ns) and maintains high-impedance state during power-down when OE is held high via pull-up.

Its CMOS-based transmission-gate architecture supports over-voltage tolerant I/O (up to 4.6V) regardless of VCC level, and guarantees isolation leakage ≤10 µA when VCC = 0V - critical for hot-swap and partial-power-down system architectures.

Key Specifications

Pinout & Package

74CBTLV16211PAG8 is housed in a 56-pin Thin Shrink Small Outline Package (TSSOP), measuring 12.5 mm × 6.1 mm × 1.2 mm, with 0.5 mm lead pitch and exposed thermal pad (not electrically connected). Pin numbering follows standard TSSOP top-view convention with pin 1 marked by dot or bevel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV16211PAG and 74LVC16245APAG, the 74CBTLV16211PAG8 uniquely delivers true bi-directional, zero-direction-pin switching with sub-0.3 ns latency and power-off isolation - making it irreplaceable in dynamic bus-sharing and hot-swap architectures.

Availability

74CBTLV16211PAG8 is available at Aetrix Electronics and suitable for memory subsystem isolation, PCIe sideband routing, and industrial I/O expansion requiring stable component supply, full RoHS compliance, and guaranteed long-term manufacturability through Renesas' qualified product lifecycle program.

Supply support for 74CBTLV16211PAG8 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.

The 74CBTLV16211PAG8 belongs to Renesas' legacy IDT logic portfolio, designed specifically for high-speed, low-voltage bus isolation in space-constrained, thermally demanding embedded systems.

FAQ

What is the maximum operating voltage on the A/B pins of the 74CBTLV16211PAG8 when VCC = 2.5V?

The 74CBTLV16211PAG8 supports input/output voltages from –0.5V to 4.6V on all A/B pins regardless of VCC level. This over-voltage tolerance allows safe interfacing with 5V peripherals or legacy subsystems even when powered from 2.5V, eliminating external level-shifting circuitry. The specification is validated per absolute maximum ratings and confirmed in the DC electrical characteristics table.

Does the 74CBTLV16211PAG8 require external pull-up resistors on OE pins, and why?

Yes, the 74CBTLV16211PAG8 requires pull-up resistors on both 1OE and 2OE pins to ensure high-impedance state during power-up or brown-out conditions. Because OE is active-low, an uncontrolled floating OE could inadvertently enable the switch before VCC stabilizes, causing bus contention or data corruption. A 10 kΩ pull-up to VCC is recommended per the application guidance in the datasheet's "Functional Description" section.

Can the 74CBTLV16211PAG8 be used to isolate I²C bus segments, and what design considerations apply?

Yes, the 74CBTLV16211PAG8 can isolate I²C segments due to its bi-directional, low-RON (5Ω) switching and strong drive capability. However, designers must account for increased bus capacitance from the switch's CIO(OFF) = 6.5 pF and ensure total capacitance remains ≤400 pF per I²C spec. Pull-up resistors should be placed on the master side only, and slew-rate limiting may be needed for fast-mode-plus (1 Mbps) operation.

What is the thermal performance of the 74CBTLV16211PAG8 in continuous 24 mA per channel operation?

In continuous 24 mA per channel operation at TA = +85°C, the 74CBTLV16211PAG8 dissipates <12 mW per switch (P = I² × RON ≈ 24 mA² × 5Ω), resulting in negligible junction temperature rise (<2°C) in standard TSSOP-56 mounting. Thermal resistance θJA is specified at 45°C/W, and the device remains within safe operating area across its full industrial temperature range without forced airflow.

Is the 74CBTLV16211PAG8 pin-compatible with earlier IDT CBTLV16211 variants in TSSOP-56?

Yes, the 74CBTLV16211PAG8 is fully pin-compatible with all prior IDT-branded CBTLV16211 devices in PAG56 (TSSOP-56) packaging, including 74CBTLV16211PAG and obsolete SSOP versions adapted via footprint conversion. The pinout, function mapping, and DC/AC specifications are identical across these orderable variants, enabling seamless replacement in existing designs without layout changes.