Texas Instruments SN74AUP1T34DCKR

Overview

SN74AUP1T34DCKR 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 (e.g., 3.39 ns typical at 3 V → 3 V, CL = 5 pF), ±6-mA output drive at 3 V, and Ioff-enabled partial power-down operation. It is used in Bluetooth/WiFi module interfacing where 1.8-V processors drive 3.3-V peripherals.

For engineers reviewing the SN74AUP1T34DCKR datasheet, SN74AUP1T34DCKR pinout, SN74AUP1T34DCKR application, or SN74AUP1T34DCKR equivalent, key selection criteria include verified dual-rail voltage flexibility (0.9–3.6 V on both sides), guaranteed high-impedance isolation when either VCCA or VCCB is grounded, input hysteresis for slow-edge immunity, and SC70-5 package compatibility with space-constrained portable electronics designs.

Technical Context

The SN74AUP1T34DCKR implements a unidirectional A-to-B translation architecture with independent VCCA and VCCB rails-neither rail powers the other, and signal flow is strictly A-input → B-output. Its internal circuitry includes Ioff protection that disables outputs during power-down and VCC isolation logic that forces B-port into high-impedance when VCCA = GND, regardless of A-port state.

Input hysteresis (typical 100 mV) enables reliable switching with input slew rates as slow as 200 ns/V, while balanced tPLH/tPHL ensures minimal duty-cycle distortion in clock-forwarding or data-bus applications. The device operates across –40°C to +85°C and meets JESD22-A114-A (5000-V HBM) ESD requirements.

Key Specifications

Pinout & Package

SN74AUP1T34DCKR uses the SC70-5 (DCK) package: 2.00 mm × 1.25 mm body, 0.65-mm pitch, 5-pin surface-mount outline with gull-wing leads. Pin 1 (VCCA) is located at top-left corner (Q3 quadrant per tape reel orientation).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0101RGTR and SN74LVC1T34DCKR, SN74AUP1T34DCKR uniquely provides true dual-rail independence, guaranteed VCC isolation, and sub-5-µA ICC - making it the only option among the three qualified for ultra-low-power, multi-voltage subsystem isolation in portable and battery-operated equipment.

Availability

SN74AUP1T34DCKR is available at Aetrix Electronics and suitable for Bluetooth module integration, WiFi baseband interfacing, and industrial sensor hub designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for SN74AUP1T34DCKR 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 delivering analog and embedded processing solutions, with leadership in low-power logic, precision analog, and high-reliability interface products.

The SN74AUP1T34DCKR belongs to TI's AUP (Advanced Ultra-Low-Power) logic family, designed specifically for energy-constrained, multi-voltage portable electronics where rail independence, sub-µA quiescent current, and robust noise immunity are mandatory.

FAQ

What is the maximum supported data rate for SN74AUP1T34DCKR in a 3.3-V-to-1.8-V translation setup?

The SN74AUP1T34DCKR achieves a typical propagation delay of 4.2 ns (tPLH/tPHL) at VCCA = 3 V, VCCB = 1.8 V, CL = 5 pF. With balanced delays and 10%–90% rise/fall times under 2 ns, it reliably supports data rates exceeding 100 Mbps in point-to-point digital interfaces such as GPIO, reset, or enable lines. For sustained high-speed serial use, verify signal integrity with board-level simulation using the device's 7-pF CI/O capacitance and layout guidelines.

Does SN74AUP1T34DCKR support bidirectional level translation?

No, SN74AUP1T34DCKR is strictly unidirectional (A → B only). It lacks auto-direction sensing or output-enable control. Signal flow must be configured externally: A port receives input referenced to VCCA, and B port delivers translated output referenced to VCCB. For bidirectional applications like I²C, consider TI's TXB0101 or PCA9306 instead - those devices implement active direction detection and separate enable logic not present in SN74AUP1T34DCKR.

Can SN74AUP1T34DCKR operate with VCCA = 0 V while VCCB remains powered?

Yes. When VCCA = 0 V (GND), the VCC isolation feature forces the B port into high-impedance regardless of A-port voltage or VCCB state. This behavior is explicitly characterized in the datasheet and enables safe "hot insertion" of low-voltage controllers into powered 3.3-V subsystems. However, VCCB must remain within 0.9–3.6 V for B-port functionality; if VCCB = 0 V, both ports go Hi-Z.

What decoupling capacitors are recommended for SN74AUP1T34DCKR?

Texas Instruments recommends a 0.1-µF ceramic capacitor placed as close as possible to each supply pin (VCCA and VCCB) with short, low-inductance traces to GND. For systems with high transient current demands or noisy power planes, add a 1.0-µF bulk capacitor nearby. The SC70-5 layout supports this with adjacent VCCA/GND and VCCB/GND pairs - avoid shared vias or daisy-chained caps to maintain rail stability during fast output switching in SN74AUP1T34DCKR.

Is SN74AUP1T34DCKR compatible with 1.0-V logic inputs?

Yes. SN74AUP1T34DCKR supports VCCA as low as 0.9 V, and its input thresholds scale with VCCA (VIH ≈ 0.65×VCCA, VIL ≈ 0.3×VCCA). At VCCA = 1.0 V, VIH = 0.65 V and VIL = 0.3 V - fully compatible with 1.0-V CMOS outputs. Input hysteresis (~100 mV) further ensures noise margin. Always confirm source driver strength meets the 1-µA max input leakage requirement of SN74AUP1T34DCKR at that voltage.