Nexperia USA Inc. 74LVCH1T45GM,132

Overview

74LVCH1T45GM,132 from Nexperia is a single-bit dual-supply translating transceiver with 3-state outputs and active bus hold, enabling bidirectional level translation between 1.2 V and 5.5 V domains. It features independent VCC(A) and VCC(B) supplies, DIR-controlled directionality, IOFF-enabled partial power-down, and operates across –40 °C to +125 °C. Used in mixed-voltage I²C, UART, and GPIO interfacing between SoC and peripheral ICs.

For engineers reviewing the 74LVCH1T45GM,132 datasheet, 74LVCH1T45GM,132 pinout, 74LVCH1T45GM,132 application, or 74LVCH1T45GM,132 equivalent, key selection criteria include dual-rail voltage flexibility (1.2–5.5 V), suspend-mode behavior during power-down, bus hold functionality for floating inputs, and guaranteed timing performance up to 420 Mbps in 3.3 V → 5.0 V translation.

Technical Context

The device implements a bidirectional data path with direction control via DIR input referenced to VCC(A); HIGH enables A→B, LOW enables B→A. Both ports support independent supply rails, with A and DIR tied to VCC(A), and B tied to VCC(B). The IOFF circuit disables outputs and blocks backflow current when either VCC rail is at GND, ensuring safe partial power-down operation.

Active bus hold on A and B ports maintains valid logic levels on unused inputs without external pull resistors. Propagation delays are asymmetric and supply-dependent - e.g., tPLH(A→B) ranges from 1.4 ns (5.0 V → 3.3 V) to 23.5 ns (1.5 V → 1.5 V) over –40 °C to +125 °C - reflecting true voltage- and temperature-governed switching behavior.

Key Specifications

Pinout & Package

XSON6 package (SOT886): 1.0 mm × 1.45 mm × 0.5 mm body, no leads, 6-terminal exposed pad-less construction optimized for space-constrained PCB layouts and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC1T45DBVR and TXS0101DCKR, the 74LVCH1T45GM,132 uniquely combines bus hold, IOFF, and the lowest ICC (16 μA), making it optimal for power-sensitive, mixed-rail designs requiring robustness during undervoltage and hot-swap conditions.

Availability

74LVCH1T45GM,132 is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control, portable medical device, and programmable logic controller applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for 74LVCH1T45GM,132 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 standard logic, analog, and MOSFET solutions, serving automotive, industrial, and consumer markets with ASIL-certified and AEC-Q200-qualified components.

The 74LVCH1T45GM,132 belongs to Nexperia's LVC/LVCH advanced logic family, engineered specifically for ultra-low-power, mixed-voltage system interfacing in space- and energy-constrained embedded applications.

FAQ

Can 74LVCH1T45GM,132 translate between 1.2 V and 5.0 V simultaneously?

Yes. VCC(A) can be set to 1.2 V while VCC(B) is set to 5.0 V, enabling bidirectional translation. Inputs at either port accept voltages up to 5.5 V regardless of local VCC, and output drive strength scales with the respective VCC rail - verified per datasheet Table 6 and Figure 1.

What happens to the 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 functional description Section 7. IOFF limits leakage to ±2 μA, preventing back-current into the powered-down A-side domain - critical for safe rail sequencing in multi-supply systems.

Does the bus hold feature eliminate all need for external pull resistors?

Yes, for static or low-frequency signals. Bus hold provides ~100 μA effective pull-up/pull-down at 3.0 V, sufficient to maintain logic state on unused A/B pins. However, for high-speed or noise-prone environments, external resistors may still be used to override bus hold strength and improve noise immunity.

Is the 74LVCH1T45GM,132 pin-compatible with the 74LVC1T45GM variant?

Yes - both share identical XSON6 (SOT886) pinout, thermal pad absence, and mechanical dimensions. The LVCH version adds bus hold and slightly improved drive strength (±24 mA vs. ±20 mA at 3.0 V), but electrical and physical compatibility is maintained for drop-in replacement in existing layouts.