SN74AUP1T34-Q1 - 1-Bit Dual-Supply Level Translator | Texas Instruments
MPN: SN74AUP1T34-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.38 | $3.80 |
| 100 | $0.3 | $30.00 |
| 500 | $0.25 | $125.00 |
| 1,000 | $0.21 | $210.00 |
| 3,000 | $0.18 | $540.00 |
SN74AUP1T34-Q1 Overview
A voltage-level translator is a logic IC that converts signals between two different voltage domains, allowing a 1.8V microcontroller to safely drive a 3.3V peripheral or vice versa. Translators sit within the broader logic IC family, alongside buffers, gates, and bus switches, and are essential wherever mixed-voltage systems interface.
Key features include dual-supply operation enabling level translation in either direction (up or down), the AUP (Advanced Ultra-low Power) process family for very low dynamic power consumption, and push-pull output structure that removes the need for pull-up resistors required by open-drain translators. Per the TI datasheet, pin A is referenced to VCCA and receives the signal to be translated.
The device belongs to TI's AUP1T single-gate translator family, which combines tiny single-gate packaging with wide supply flexibility, making it suitable for space-constrained automotive modules. The noninverting buffer topology preserves signal polarity with minimal propagation delay.
Typical applications include automotive body electronics and lighting modules, level-shifting between 1.8V MCUs and 3.3V CAN or LIN transceivers, interfacing low-voltage sensors to higher-voltage logic, and general-purpose single-bit signal conversion in infotainment and cluster designs.
Design consideration: ensure both supply rails are within the datasheet-recommended ranges and observe power-up sequencing guidance in the datasheet to avoid undefined outputs during startup. Because this is a unidirectional translator, the signal must always flow from pin A to pin Y/B.
Drop-in alternatives for SN74AUP1T34-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SN74AUP1T34-Q1 (same form factor and footprint) — differing in Function, Package, Operating Temperature, Channels, Output Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SN74AUP1T34DCKR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.09 / Unit
View Datasheet →SN74LVC1T45DCKR
✅ Drop-In✓ In Stock
$0.14 / Unit
View Datasheet →SN74LV1T34DCKR
✅ Drop-In📋 Reference alternative (not in catalog)
SN74AUP1T34-Q1 Maximum Ratings & Electrical Characteristics
| Function | 1-bit noninverting voltage-level translator |
| Translation Direction | Unidirectional (A to B) |
| Supply Rails | Dual (VCCA and VCCB), configurable |
| Output Type | Push-Pull |
| Channels | 1 |
| Bits per Element | 1 |
| Polarity | Non-Inverting |
| Package | SC-70-5 (DCK) |
| Operating Temperature | -40C to +125C |
| Qualification | AEC-Q100 qualified (automotive) |
| Mounting Type | Surface Mount |
| Family | AUP (Advanced Ultra-low Power) |
| RoHS Status | Compliant |
SN74AUP1T34-Q1 Pin Configuration
| Pin 1 | A — Input referenced to VCCA - signal to be translated |
| Pin 2 | GND — Ground (0 V reference) |
| Pin 3 | B (Y) — Noninverting output referenced to VCCB |
| Pin 4 | VCCB — B-port supply rail |
| Pin 5 | VCCA — A-port supply rail |
Typical Applications
SN74AUP1T34-Q1 is suitable for 6 applications: Automotive Body Electronics, Mixed-Voltage MCU-to-Peripheral Interface, Automotive Cluster and Infotainment, Sensor Signal Interface, Gateway and Networking Modules, Industrial Control and PLC I/O.
Automotive Body Electronics
In automotive body control and lighting modules, MCUs running at 1.8V frequently need to drive 3.3V or 5V peripherals such as transceivers and LED drivers. The SN74AUP1T34-Q1 fits because it is AEC-Q100 qualified and rated -40C to +125C, surviving under-hood and near-luminaire thermal environments. Its dual configurable rails allow VCCA=1.8V, VCCB=3.3V setups, and the push-pull output drives the load directly with no pull-up resistors, improving edge rates and reducing BOM count in single-signal interface points.
Recommended
Mixed-Voltage MCU-to-Peripheral Interface
When a 1.8V microcontroller communicates with 3.3V sensors or memories, a single-bit translator such as the SN74AUP1T34-Q1 bridges one signal (chip-select, enable, or interrupt) per device. The dual-supply architecture means signal polarity and logic levels are always well-defined regardless of direction of translation, unlike resistor-divider down-shift which degrades noise margin. The AUP family's ultra-low dynamic power keeps standby current minimal in always-on automotive or IoT nodes, and the 5-pin SC-70 footprint consumes minimal board area.
Recommended
Automotive Cluster and Infotainment
Instrument clusters and infotainment head units mix 1.8V SoC I/O with 3.3V display, audio, and touch-controller interfaces. The SN74AUP1T34-Q1 provides one clean, low-jitter translation channel with push-pull output, avoiding the RC-slowed edges of divider networks that can corrupt fast enable or reset lines. AEC-Q100 qualification and -40C to +125C rating cover automotive interior thermal profiles, and the tiny SC-70 package fits dense PCB layouts around connectors and display FPC terminations.
Recommended
Sensor Signal Interface
Low-voltage sensors and temperature monitors (e.g., 1.8V digital outputs) often need their alert or data lines read by 3.3V logic. The SN74AUP1T34-Q1 translates the sensor output up to the controller domain while maintaining fast, clean edges with its push-pull driver. Because VCCA and VCCB are independent, the sensor supply domain and controller supply domain can be powered and sequenced flexibly. Its ultra-low AUP quiescent power suits battery-backed or always-on sensing nodes in automotive and industrial monitoring.
Recommended
Gateway and Networking Modules
Automotive Ethernet and CAN/LIN gateway modules combine low-voltage processors with 3.3V transceivers. A single SN74AUP1T34-Q1 per enable or interrupt line ensures level-clean signaling between domains, with propagation characteristics well controlled by the AUP family. Compared to discrete transistor level shifters, the integrated translator provides symmetric rise/fall edges and specified drive across temperature, improving timing margins on reset and sleep-control lines. AEC-Q100 qualification supports the automotive networking environment directly.
Recommended
Industrial Control and PLC I/O
Industrial controllers mix 1.8V/2.5V DSP I/O with 3.3V or 5V field-side logic. The SN74AUP1T34-Q1 shifts individual control signals with defined thresholds from two independent rails, and the -40C to +125C range covers industrial cabinets despite being an automotive-qualified part. Using one translator per signal gives designers granular control over direction and domain assignment, and the push-pull output drives optocoupler or buffer inputs directly without pull-up resistors, simplifying PLC digital-input front ends.
Recommended
Recommended Products Summary
Engineering reference data for SN74AUP1T34-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74AUP1T34DCKR | SN74LVC1T45DCKR | SN74LV1T34DCKR |
|---|---|---|---|---|
| Package | SC-70-5 (DCK) | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Architecture | Dual supply (VCCA/VCCB) | Dual supply | Dual supply + DIR pin | Single supply (up-translation only) |
| AEC-Q100 Qualified | Yes | No | No | No |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Output Type | Push-Pull | Push-Pull | Push-Pull | Push-Pull |
| Channels | 1 | 1 | 1 (bidirectional via DIR) | 1 |
Key Differentiators
- AEC-Q100 automotive qualification (vs SN74AUP1T34DCKR)
- Dual independent supply rails enable down-translation (vs SN74LV1T34DCKR)
- Fixed unidirectional simplicity (vs SN74LVC1T45DCKR)
Design Notes
Decouple both VCCA and VCCB with 100 nF ceramic capacitors placed within 2 mm of the pins, per TI logic application guidance. Because the two rails are independent, define a power-up sequence or verify the datasheet Ioff/partial-power-down behavior; undefined outputs during startup can falsely trigger downstream enables. Ensure both rails stay within datasheet-recommended ranges before asserting input signals.
This translator is strictly unidirectional from A to B. Do not back-drive the B output from a source with lower impedance than the output drive, especially during VCCB power-down, or parasitic currents and latch-up risk increase. For bidirectional lines such as I2C, use an open-drain translator (TXS/LSF families) instead.
The SC-70-5 footprint is tiny (2.0 x 2.1 mm); use standard DCK land pattern and short, direct traces for the translated signal to preserve edge rates. Keep the A-side trace away from noisy switching nodes since input thresholds are referenced to VCCA. Thermal management is unnecessary at single-gate power levels.
Compliance Information
RoHS compliant and lead-free per TI product page and DigiKey listing. AEC-Q100 automotive qualified per TI datasheet. REACH and halogen-free declarations available via TI environmental certificates on TI.com.
