Nexperia USA Inc. 74LVCH1T45GW,125

Overview

74LVCH1T45GW,125 from Nexperia is a single-bit, dual-supply translating transceiver with 3-state outputs enabling bidirectional level translation between 1.2 V and 5.5 V domains. It features independent VCC(A) and VCC(B) supplies, DIR-controlled data direction (A↔B), IOFF partial power-down protection, and active bus hold on A/B ports. Used in mixed-voltage I²C, GPIO, and UART interfaces between SoCs and peripherals.

For engineers reviewing the 74LVCH1T45GW,125 datasheet, 74LVCH1T45GW,125 pinout, 74LVCH1T45GW,125 application, or 74LVCH1T45GW,125 equivalent, key selection criteria include dual-rail voltage flexibility (1.2–5.5 V per rail), suspend-mode high-impedance behavior when either supply is grounded, bus hold strength at 1.2 V, IOFF leakage < ±2 μA, and propagation delays as low as 0.7 ns (DIR→A, VCC(A)=5.0 V).

Technical Context

The device implements a bidirectional, direction-controlled data path where DIR determines signal flow: HIGH enables A→B translation; LOW enables B→A. Both ports are referenced to their respective supplies-A and DIR to VCC(A), B to VCC(B)-enabling true voltage-domain isolation.

Its IOFF circuit disables outputs and blocks backflow current during partial power-down; suspend mode forces both A and B into high-impedance when either VCC(A) or VCC(B) = GND. Bus hold circuitry actively maintains valid logic levels on floating A/B inputs without external pull resistors.

Key Specifications

Pinout & Package

TSSOP6 (SOT363-2) package: 6-pin plastic thin shrink small outline, 1.25 mm body width, lead pitch 0.5 mm, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1T45DCKR and TXS0101DCKR, the 74LVCH1T45GW,125 uniquely combines bus hold, 5.5 V tolerance, and sub-2 μA IOFF leakage across full temperature range - making it optimal for space-constrained, mixed-voltage industrial and automotive nodes requiring zero external biasing.

Availability

74LVCH1T45GW,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, wearable sensor hubs, and server baseboard management requiring stable component supply across extended temperature ranges.

Supply support for 74LVCH1T45GW,125 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 74LVCH1T45 belongs to Nexperia's LVC/LVCH logic family, engineered specifically for low-voltage, mixed-rail system interfacing with emphasis on power efficiency, ESD robustness, and thermal stability in harsh environments.

FAQ

Can 74LVCH1T45GW,125 translate between 1.2 V and 5.0 V simultaneously?

Yes. With VCC(A) = 1.2 V and VCC(B) = 5.0 V, the device supports bidirectional translation at up to 75 Mbps (1.2 V → 5.0 V) and 60 Mbps (5.0 V → 1.2 V), verified per Table 2 in the datasheet. Input thresholds scale with VCC(A), while B-port outputs swing rail-to-rail relative to VCC(B).

What happens to A and B ports when VCC(A) = 0 V and VCC(B) = 3.3 V?

In this suspend condition, both A and B ports enter high-impedance OFF-state per Table 4 function table. The IOFF circuit blocks current flow, and leakage remains ≤ ±2 μA, preventing unintended loading of the 3.3 V domain or damage to the unpowered side.

Does the bus hold feature work at 1.2 V VCC(A)?

Yes. Bus hold is fully functional down to 1.2 V, delivering ±19 μA hold current at VI = 0.42 V/0.78 V (Table 7). This ensures reliable logic retention on floating A/B lines even in ultra-low-voltage IoT sensor nodes.

Is the TSSOP6 package RoHS and REACH compliant?

Yes. The 74LVCH1T45GW,125 in SOT363-2 package meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound, certified per Nexperia's Declaration of Conformity DocID: AS-001.