Nexperia USA Inc. 74AVCH4T245PW,112

Overview

74AVCH4T245PW,112 from Nexperia is a 4-bit dual-supply translating transceiver enabling bidirectional level translation between 0.8 V and 3.6 V domains. It operates as two independent 2-bit transceivers or one 4-bit unit, with separate VCC(A) and VCC(B) supplies, active bus hold, IOFF partial power-down, and 3-state outputs-used in mixed-voltage SoC interconnects, FPGA I/O bridging, and DDR memory interface voltage adaptation.

For engineers reviewing the 74AVCH4T245PW,112 datasheet, 74AVCH4T245PW,112 pinout, 74AVCH4T245PW,112 application, or 74AVCH4T245PW,112 equivalent, key selection criteria include configurable direction control (nDIR), output enable (nOE), bus hold elimination of external resistors, suspend-mode isolation during partial power-down, and JEDEC-compliant voltage translation across 0.8–3.6 V rails.

Technical Context

The device implements dual-rail CMOS logic with independent input referencing: nAn/nDIR/nOE tied to VCC(A), while nBn ports reference VCC(B). Its IOFF circuit enforces high-impedance outputs when either supply drops to GND, preventing backflow current. Bus hold circuitry actively maintains valid logic levels on unused A/B port inputs without external biasing.

Directional data flow is controlled per 2-bit channel via dedicated nDIR pins; nOE independently disables outputs to isolate both buses. Propagation delay varies with supply pairing-e.g., 5.9 ns (nAn→nBn) at VCC(A)=2.5 V/VCC(B)=3.3 V-and disable/enable times remain stable across temperature (−40 °C to +125 °C).

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1), 16-pin plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Compared with SN74AVCH4T245PWR and 74LVC4T245PW,112, the 74AVCH4T245PW,112 uniquely delivers full −40 °C to +125 °C operation, 0.8 V minimum supply, integrated bus hold, and IOFF-making it the sole option for robust, ultra-low-voltage, mixed-rail industrial and automotive applications.

Availability

74AVCH4T245PW,112 is available at Aetrix Electronics and suitable for FPGA-to-peripheral interfacing, DDR memory voltage adaptation, AI accelerator I/O bridging, and hot-swap industrial I/O modules requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74AVCH4T245PW,112 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AVCH series targets advanced low-voltage mixed-signal systems, delivering scalable voltage translation with robust power management features for next-generation energy-efficient electronics.

FAQ

What is the minimum operating voltage for VCC(A) and VCC(B)?

The 74AVCH4T245PW,112 supports VCC(A) and VCC(B) down to 0.8 V each, enabling direct interfacing with sub-1 V processor cores and ultra-low-power sensors. Operation below 0.8 V is not guaranteed and may result in undefined logic behavior or increased leakage.

How does the bus hold feature eliminate external resistors?

Integrated bus hold circuitry sources or sinks up to ±100 μA at 3.0 V to maintain valid HIGH or LOW states on floating A/B port inputs-matching typical CMOS input leakage and obviating discrete pull-up/pull-down resistors in space-constrained designs.

Can the device translate between 0.8 V and 3.3 V bidirectionally?

Yes: with VCC(A) = 0.8 V and VCC(B) = 3.3 V, the device supports bidirectional translation at up to 200 Mbit/s. Input thresholds scale with respective supplies, and output drive strength adapts to the destination rail's VCC, ensuring reliable signal integrity.

What happens during suspend mode when one supply is at GND?

When either VCC(A) or VCC(B) = 0 V, both A-side and B-side outputs enter high-impedance OFF-state regardless of nDIR/nOE states. The bus hold circuit remains active only on the powered side, preventing floating nodes while blocking all current flow between rails.