Renesas 74CBTLV3245PGG8

Overview

74CBTLV3245PGG8 from Renesas Electronics is a low-voltage octal bus switch with bi-directional 5Ω A/B switches, operating from 2.3V to 3.6V supply, supporting industrial temperature range (−40°C to +85°C), and featuring power-off isolation and over-voltage tolerance for 3.3V high-speed bus switching applications.

For engineers reviewing the 74CBTLV3245PGG8 datasheet, 74CBTLV3245PGG8 pinout, 74CBTLV3245PGG8 application, or 74CBTLV3245PGG8 equivalent, key selection criteria include on-resistance (5–40Ω), propagation delay (≤0.25ns), output enable/disable timing (1–5ns), isolation leakage (≤50µA at VCC = 0), and TSSOP-20 package compatibility with standard '245 logic footprints.

Technical Context

The 74CBTLV3245PGG8 implements eight independent analog/digital bi-directional MOSFET switches controlled by a single active-low Output Enable (OE) signal. When OE is low, ports A1–A8 are electrically connected to B1–B8 with minimal resistance and capacitance; when OE is high, both ports present high-impedance isolation.

It operates asynchronously without internal clocking or level-shifting circuitry, supports voltage translation between same-supply domains only, and maintains channel isolation during power-up/down via OE pull-up recommendation - critical for hot-swap and bus arbitration systems.

Key Specifications

Pinout & Package

TSSOP-20 package (PGG20 code), 0.65mm pitch, 6.5mm × 4.4mm body size, exposed pad not present, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBTLV3245PWR and 74LVC245APW,118, the 74CBTLV3245PGG8 delivers lowest on-resistance and fastest propagation in a pin-compatible industrial-grade octal bus switch, making it optimal for high-fidelity, low-latency inter-domain signal routing where passive bidirectionality and power-off safety are mandatory.

Availability

74CBTLV3245PGG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, PCIe hot-plug interfaces, DDR multiplexing, and automated test equipment requiring stable component supply across extended temperature and long production lifecycles.

Supply support for 74CBTLV3245PGG8 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 74CBTLV3245PGG8 belongs to Renesas' CBTLV low-voltage bus switch family, engineered specifically for high-speed, low-noise, power-aware interconnection in 3.3V industrial and communications systems.

FAQ

What is the maximum operating temperature for the 74CBTLV3245PGG8?

The 74CBTLV3245PGG8 is rated for industrial temperature range operation from −40°C to +85°C. This specification is guaranteed across all DC and switching parameters in the datasheet, including RON, tPD, and IOFF. Operation outside this range may result in parametric degradation or functional failure. The device uses standard TSSOP-20 packaging with thermal characteristics validated under JEDEC JESD22-A104 conditions.

Does the 74CBTLV3245PGG8 support voltage translation between different logic families?

No, the 74CBTLV3245PGG8 does not perform voltage translation. It is a passive FET-based switch that requires matched VCC on both sides of the A/B ports. Its VI and VO ratings (−0.5V to +4.6V) provide overvoltage tolerance but do not enable level-shifting functionality. For mixed-voltage domain interfacing, discrete level translators or dedicated voltage-tolerant transceivers must be used alongside the 74CBTLV3245PGG8.

How should the OE pin of the 74CBTLV3245PGG8 be handled during power-up?

The OE pin of the 74CBTLV3245PGG8 must be held high (≥VIH) during power-up to ensure default high-impedance isolation. Renesas recommends tying OE to VCC through a 10kΩ pull-up resistor. This prevents unintended bus connection before system control logic initializes. Leaving OE floating risks metastability and potential contention, especially in multi-rail power sequences where VCC ramps independently.

What is the typical on-resistance of the 74CBTLV3245PGG8 at 3.3V supply?

At VCC = 3.3V and IO = 24mA, the typical on-resistance (RON) of the 74CBTLV3245PGG8 is 5Ω, with a maximum of 7Ω over temperature and process variation. This value is measured differentially across A–B terminals and remains consistent across all eight channels. Lower RON directly reduces voltage drop and signal distortion in high-speed parallel bus applications.

Is the 74CBTLV3245PGG8 pin-compatible with older 74 series logic devices?

Yes, the 74CBTLV3245PGG8 is explicitly designed with pin-out compatibility to standard '245 logic products, including 74LS245 and 74HC245. Its TSSOP-20 footprint matches industry-standard 245 layouts, allowing direct PCB substitution in existing designs. However, note that unlike traditional 245 transceivers, the 74CBTLV3245PGG8 lacks direction control and operates as a bidirectional switch - functionality must be verified in-system.