Texas Instruments SN74LV1T125QDBVRQ1

Overview

SN74LV1T125QDBVRQ1 from Texas Instruments is an automotive-grade single-buffer gate with 3-state output and integrated voltage translation, performing Y = A logic in positive logic. It operates from 1.6 V to 5.5 V supply, supports up/down level translation (e.g., 1.2 V → 1.8 V, 3.3 V → 2.5 V), features 5.5-V tolerant inputs, and delivers ≤4.1 ns propagation delay at 5-V VCC with 15-pF load - used in automotive body control modules for signal isolation between mixed-voltage subsystems.

For engineers reviewing the SN74LV1T125QDBVRQ1 datasheet, SN74LV1T125QDBVRQ1 pinout, SN74LV1T125QDBVRQ1 application, or SN74LV1T125QDBVRQ1 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification (-40°C to +125°C), 3-state enable timing (TEN ≤ 4.8 ns at 5 V), input threshold compatibility across 1.2–5.5 V domains, and SOT-23-5 package footprint constraints.

Technical Context

This device implements a single CMOS buffer with active-high output enable (OE) controlling Hi-Z state entry/exit, where output voltage levels are strictly referenced to VCC and support 1.8-V, 2.5-V, 3.3-V, and 5-V CMOS logic families. Its LVxT-enhanced input structure enables bidirectional voltage translation without external components.

Down translation is enabled by 5.5-V tolerant inputs and VCC-referenced outputs; up translation relies on reduced VIH/VIL thresholds (e.g., VIH(min) = 1.1 V at 1.65–2.0 V VCC). Functional modes are fully defined by OE and A inputs per Table 7-1, with no internal latching or feedback paths.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9 mm × 2.8 mm body size, 5-pin surface-mount outline with standard pin spacing (0.95 mm pitch). Pin 1 = OE (active-high enable), Pin 2 = A (input), Pin 3 = GND, Pin 4 = Y (3-state output), Pin 5 = VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-buffer-with-3-state-output applications.

Compared with SN74LV1T125QDBVRQ1, SN74LVC1G125QDBVRQ1 eliminates translation but reduces BOM count in single-rail systems, while MC74VHC1GT125DTT1G offers lower unit cost at the expense of automotive qualification and voltage-domain interoperability.

Availability

SN74LV1T125QDBVRQ1 is available at Aetrix Electronics and suitable for automotive body control, ADAS camera interfaces, infotainment display backlight control, and electric power steering sensor conditioning requiring stable component supply across extended temperature and long production lifecycles.

Supply support for SN74LV1T125QDBVRQ1 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

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in automotive-grade logic, power management, and signal chain solutions.

The SN74LV1T125QDBVRQ1 belongs to TI's LVxT family of single-gate logic devices designed specifically for voltage-level interoperability in mixed-supply automotive ECUs - enabling compact, low-power signal routing between legacy and next-generation subsystems.

FAQ

What is the maximum operating temperature for SN74LV1T125QDBVRQ1?

The SN74LV1T125QDBVRQ1 is AEC-Q100 Grade 1 qualified with a specified operating free-air temperature range of −40°C to +125°C. This rating applies to the full device functionality including propagation delay, output drive, and 3-state enable timing - verified across temperature extremes per test condition TA = −40°C to +125°C in the Recommended Operating Conditions table.

Does SN74LV1T125QDBVRQ1 support bidirectional level translation?

No, SN74LV1T125QDBVRQ1 is unidirectional: it translates input A to output Y only. Translation direction (up or down) is determined solely by the relationship between input signal voltage and VCC - e.g., 1.8-V input with 3.3-V VCC achieves up-translation, while 3.3-V input with 1.8-V VCC achieves down-translation. The device has no automatic sensing or reverse-path capability.

What is the minimum input voltage required to register a logic HIGH on SN74LV1T125QDBVRQ1 at 3.3-V VCC?

At 3.3-V VCC, the minimum input voltage to guarantee a logic HIGH is VIH(min) = 1.45 V (per Section 5.3 Recommended Operating Conditions). This threshold is lower than standard 3.3-V CMOS (VIH = 2.0 V), enabling reliable recognition of 1.8-V or 2.5-V logic HIGH signals without external biasing.

Can SN74LV1T125QDBVRQ1 drive a 50-pF capacitive load at 150 Mbps?

Yes - SN74LV1T125QDBVRQ1 specifies ≤6.3 ns propagation delay at 2.5-V VCC with CL = 50 pF (Section 5.7), and up to 150 Mbps operation is explicitly stated in Features. At 5-V VCC, TPD is ≤5.3 ns with CL = 50 pF (Section 5.9), confirming timing margin for 150-Mbps NRZ signaling with adequate setup/hold margin.

Is SN74LV1T125QDBVRQ1 pin-compatible with SN74LVC1G125QDBVRQ1?

Yes - both SN74LV1T125QDBVRQ1 and SN74LVC1G125QDBVRQ1 use identical SOT-23-5 (DBV) package with identical pinout: Pin 1 = OE, Pin 2 = A, Pin 3 = GND, Pin 4 = Y, Pin 5 = VCC. However, functional differences (e.g., translation capability, input thresholds) require schematic and layout validation before substitution.