Nexperia USA Inc. 74ALVC164245DL,112

Overview

74ALVC164245DL,112 from Nexperia is a 16-bit dual-supply translating transceiver in TSSOP48 package, designed for bidirectional level translation between 3 V (VCC(A) = 1.5–3.6 V) and 5 V (VCC(B) = 1.5–5.5 V) buses. It features two independent 8-bit channels (1A/1B and 2A/2B), non-inverting 3-state outputs, and direction control (1DIR/2DIR) and output enable (1OE/2OE) inputs referenced to their respective supply domains. It enables interoperability in mixed-voltage systems such as legacy 5 V microcontrollers interfacing with modern 3.3 V FPGAs.

For engineers reviewing the 74ALVC164245DL,112 datasheet, 74ALVC164245DL,112 pinout, 74ALVC164245DL,112 application, or 74ALVC164245DL,112 equivalent, this device delivers verified dual-rail voltage translation with sub-10 ns propagation delay, IOFF partial power-down, and JEDEC-compliant ESD protection - critical for industrial bus bridging, memory interface adaptation, and mixed-signal SoC interconnect design.

Technical Context

This transceiver implements a dual-octet architecture with physically isolated A-side (3 V domain) and B-side (5 V domain) I/O banks, each with dedicated direction and output-enable controls. All A-side pins (1A0–1A7, 2A0–2A7, 1DIR, 2DIR, 1OE, 2OE, VCC(A), GND) are referenced to VCC(A); all B-side pins (1B0–1B7, 2B0–2B7, VCC(B)) to VCC(B). The IOFF circuit ensures high-impedance isolation when either supply is at 0 V, preventing backfeed current.

Functional operation follows a strict truth table: nOE = LOW enables bidirectional data flow determined by nDIR (HIGH = A→B, LOW = B→A); nOE = HIGH forces both A and B ports into 3-state. Propagation delays range from 1.0 ns (best-case 3.3 V → 5 V) to 9.5 ns (worst-case 2.3 V → 3.3 V), with enable/disable times under 12 ns across full temperature range (−40 °C to +125 °C).

Key Specifications

Pinout & Package

TSSOP48 (SOT362-1) package: plastic thin shrink small outline, 48 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height. Pin 1 index marked; lead finish = SnAgCu (lead-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245DGGR and 74LVC16T245PW,118, the 74ALVC164245DL,112 uniquely combines true dual-supply operation (1.5–3.6 V / 1.5–5.5 V), guaranteed IOFF, and 5 V output drive - making it the only option among the three for robust 3.3 V ↔ 5 V hot-swap-capable bus bridging.

Availability

74ALVC164245DL,112 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automotive BCM gateways, and server memory subsystem adapters requiring stable component supply across extended temperature ranges and mixed-voltage environments.

Supply support for 74ALVC164245DL,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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and computing applications.

The 74ALVC family targets high-speed, low-power, mixed-voltage digital interfacing - specifically engineered to replace obsolete TTL and earlier CMOS translators in space-constrained, thermally demanding systems.

FAQ

Can 74ALVC164245DL,112 operate with VCC(A) = 1.8 V and VCC(B) = 5.0 V?

Yes. The device supports VCC(A) from 1.5 V to 3.6 V and VCC(B) from 1.5 V to 5.5 V, with VCC(B) ≥ VCC(A) required for normal operation. At 1.8 V/5.0 V, VIH(min) on A-side control inputs is 1.2 V (per JESD8-7), ensuring reliable logic recognition; propagation delay increases to ~7.5 ns but remains within specification.

What happens if VCC(A) = 0 V while VCC(B) = 5 V is active?

In suspend mode, the IOFF circuit forces all A-side and B-side outputs into high-impedance, preventing current flow from VCC(B) to the grounded A-rail. However, A-side inputs must be held ≤0.7 V (typical diode drop) to avoid forward-biasing internal protection diodes - achieved via external pull-downs or bus termination.

Is 74ALVC164245DL,112 pin-compatible with older SSOP48 variants like 74ALVC164245DL?

No. The 74ALVC164245DL,112 uses TSSOP48 (SOT362-1), while the discontinued 74ALVC164245DL used SSOP48 (SOT370-1). Though both have 48 pins and identical pin functions, SOT362-1 has narrower body width (6.1 mm vs. 7.5 mm) and tighter lead pitch (0.5 mm vs. 0.635 mm), requiring PCB footprint redesign.

Does this device support hot-swap insertion into a live 5 V bus?

Yes - when configured with VCC(A) = 3.3 V and VCC(B) = 5 V, the overvoltage-tolerant A-side inputs (rated to 5.5 V) and IOFF protection allow safe insertion into an energized 5 V bus. Ensure 1OE/2OE are held HIGH during insertion to maintain 3-state, and verify A-side signals remain ≤0.7 V until VCC(A) stabilizes.