Nexperia USA Inc. 74AVCH8T245PW:118

Overview

74AVCH8T245PW:118 from Nexperia is an 8-bit dual-supply bidirectional voltage-level translating transceiver with 3-state outputs, supporting independent VCC(A) and VCC(B) rails from 0.8 V to 3.6 V. It enables translation between 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V logic domains, features bus-hold circuitry on all data I/Os, IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used in mixed-voltage SoC interconnects and FPGA-to-ASIC interface bridging.

For engineers reviewing the 74AVCH8T245PW:118 datasheet, 74AVCH8T245PW:118 pinout, 74AVCH8T245PW:118 application, or 74AVCH8T245PW:118 equivalent, key selection criteria include configurable direction control (DIR), active-low output enable (OE), IOFF leakage suppression during suspend mode, and verified 380 Mbit/s throughput for ≥1.8 V ↔ 3.3 V translation.

Technical Context

The device implements a dual-rail CMOS architecture where An, DIR, and OE inputs reference VCC(A), while Bn inputs/outputs reference VCC(B). Direction is controlled by a single DIR signal: HIGH enables An→Bn flow; LOW enables Bn→An flow. Output isolation is achieved via OE, which forces both ports into high-impedance when asserted HIGH.

IOFF circuitry actively disables outputs and limits backflow current when either VCC(A) or VCC(B) is at GND, enabling safe partial power-down. Bus-hold circuitry maintains valid logic states on floating A/B port pins without external resistors-critical for hot-swap and low-power suspend scenarios.

Key Specifications

Pinout & Package

TSSOP24 package (SOT355-1), 4.4 mm body width, 0.65 mm pitch, 24-pin surface-mount with exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional voltage translation applications.

Compared with SN74AVCH8T245RHLR, the 74AVCH8T245PW:118 offers TSSOP24 compatibility with proven manufacturability in legacy SMT lines; versus TXB0108PWR, it delivers 3.8× higher bandwidth and precise DIR-synchronized timing for memory-mapped interfaces.

Availability

74AVCH8T245PW:118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS camera links, FPGA-to-memory subsystems, and server BMC interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AVCH8T245PW:118 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

Nexperia is a global semiconductor expert delivering high-performance, reliable, and efficient devices for automotive, industrial, computing, consumer, and communications markets.

The 74AVCH series targets low-voltage, high-speed logic translation in mixed-supply systems - designed specifically for energy-efficient interfacing between next-generation processors, memory, and peripherals.

FAQ

What is the minimum recommended load capacitance for achieving 380 Mbit/s operation?

The 380 Mbit/s rating applies to ≥1.8 V ↔ 3.3 V translation with CL ≤ 15 pF, as validated in Nexperia's test circuit (Fig. 5, Table 15). Exceeding 15 pF increases propagation delay nonlinearly-measured tpd rises from 2.7 ns at 0 pF to 6.0 ns at 15 pF per Table 9. For >380 Mbit/s, reduce trace length and avoid stubs to maintain effective CL <10 pF.

Can VCC(A) and VCC(B) be powered from different switching regulators without risk of ground bounce coupling?

Yes - the device uses separate ground pins (pins 11, 12, 13) shared between both supplies, but its dual-rail I/O architecture isolates switching noise: VCC(A) noise affects only A-port thresholds, and VCC(B) noise affects only B-port thresholds. Layout best practice is to use a solid ground plane with localized 100 nF ceramic decoupling at each VCC pin, minimizing mutual impedance.

Does bus-hold functionality remain active when OE = HIGH and DIR is undefined?

Yes - bus-hold circuitry operates independently of OE and DIR states and remains fully functional in 3-state mode. When OE = HIGH, A1–A8 and B1–B8 enter high-impedance, but internal weak keepers continue sourcing/sinking current to hold last-valid logic state, preventing metastability during bus arbitration windows.

Is the TSSOP24 package (SOT355-1) RoHS-compliant and halogen-free?

Yes - the 74AVCH8T245PW:118 conforms to EU RoHS Directive 2011/65/EU and IEC 61249-2-21:2011 for halogen-free printed wiring boards. Nexperia's material declaration confirms ≤900 ppm bromine and ≤900 ppm chlorine in homogeneous materials, with no intentionally added PFOS/PFOA.