Texas Instruments SN74AUP1T34QDCKRQ1

Overview

SN74AUP1T34QDCKRQ1 from Texas Instruments is a 1-bit unidirectional noninverting voltage-level translator with dual configurable supply rails (VCCA and VCCB), supporting translation between 0.9 V and 3.6 V logic domains. It delivers balanced propagation delays (tPLH = tPHL), ±6-mA output drive at 3 V, and Ioff-enabled partial power-down operation. It is deployed in automotive ADAS camera module interfaces to translate control signals from low-voltage host processors to higher-voltage sensor subsystems.

For engineers reviewing the SN74AUP1T34QDCKRQ1 datasheet, SN74AUP1T34QDCKRQ1 pinout, SN74AUP1T34QDCKRQ1 application, or SN74AUP1T34QDCKRQ1 equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (–40°C to 125°C), VCC isolation behavior, input hysteresis for slow-edge immunity, and SC70-5 package compatibility with space-constrained automotive PCB layouts.

Technical Context

The SN74AUP1T34QDCKRQ1 implements a dual-rail CMOS translator architecture where the A port tracks VCCA (0.9 V–3.6 V) and the B port tracks VCCB (0.9 V–3.6 V), enabling bidirectional voltage node interoperability without direction control pins. Its functional mode table confirms strict unidirectional A→B logic transfer with high-impedance output when either supply rail is grounded.

It integrates Ioff circuitry that disables both ports during partial power-down, preventing backflow current, and features VCC isolation that forces B-port high-impedance when VCCA = GND - critical for fault-tolerant automotive domain partitioning. Input hysteresis (200 ns/V min transition rate support) enhances noise immunity in electrically noisy vehicle environments.

Key Specifications

Pinout & Package

SN74AUP1T34QDCKRQ1 uses the SC70-5 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm lead pitch, 1.1 mm max height. This compact footprint supports high-density routing in ADAS camera PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-level translation applications.

Compared with SN74LVC1T34QDCKRQ1 and NLSX1012MUTAG, the SN74AUP1T34QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, true Ioff, VCC isolation, and sub-10 ns delay in a 5-pin SC70 - making it the only option validated for safety-critical, space-constrained, and thermally demanding automotive camera control applications.

Availability

SN74AUP1T34QDCKRQ1 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, body control units, and infotainment display subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74AUP1T34QDCKRQ1 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, embedded processing, and automotive-grade silicon solutions with decades of automotive qualification expertise.

The SN74AUP1T34QDCKRQ1 belongs to TI's AUP (Advanced Ultra-Low-Power) logic family, designed specifically for energy-efficient, high-reliability voltage translation in automotive electronics where low static current, thermal resilience, and functional safety compliance are mandatory.

FAQ

What is the maximum allowable supply voltage difference between VCCA and VCCB for reliable operation of SN74AUP1T34QDCKRQ1?

The SN74AUP1T34QDCKRQ1 supports independent VCCA and VCCB supplies ranging from 0.9 V to 3.6 V each, with no restriction on voltage difference between them. For example, VCCA = 1.2 V and VCCB = 3.3 V is fully supported and commonly used in ADAS camera interfaces. Absolute maximum ratings specify both supplies up to 4 V, but recommended operation remains within 0.9 V–3.6 V per rail.

Does SN74AUP1T34QDCKRQ1 support bidirectional signal translation?

No, SN74AUP1T34QDCKRQ1 is strictly unidirectional - it translates signals only from A port to B port. There is no internal direction-control logic or auto-sensing capability. Bidirectional use requires separate devices or alternative parts like the NLSX1012MUTAG, which is not pin-compatible with SN74AUP1T34QDCKRQ1.

How does the VCC isolation feature behave when VCCA is grounded while VCCB remains powered in SN74AUP1T34QDCKRQ1?

When VCCA = GND (or < 0.4 V) and VCCB is powered, the SN74AUP1T34QDCKRQ1 forces the B port into a high-impedance state regardless of the A-input logic level. This prevents unintended driving of the B-side bus during host processor power-down or reset sequences - a critical safety mechanism in automotive domain isolation architectures.

Can SN74AUP1T34QDCKRQ1 be used in systems requiring I²C or SMBus level translation?

No, SN74AUP1T34QDCKRQ1 is not suitable for I²C or SMBus because it lacks open-drain outputs, bus arbitration support, and bidirectional auto-sensing. Its push-pull B output and unidirectional A→B architecture conflict with I²C's shared bidirectional bus topology. For I²C, dedicated translators like the PCA9306 or TXS0102 are required.

What is the significance of the "Q1" suffix in SN74AUP1T34QDCKRQ1, and how does it affect qualification?

The "Q1" suffix denotes automotive qualification per AEC-Q100. SN74AUP1T34QDCKRQ1 is tested and certified for Grade 1 temperature operation (–40°C to +125°C), enhanced ESD robustness (5000 V HBM), and reliability screening including HTOL and temperature cycling - distinguishing it from the commercial-grade SN74AUP1T34. This makes SN74AUP1T34QDCKRQ1 mandatory for safety-critical automotive applications.