Texas Instruments SN74LVC07APWR

Overview

SN74LVC07APWR from Texas Instruments is a hex non-inverting buffer/driver with open-drain outputs, designed for level translation and wired-OR logic in 1.65-V to 5.5-V systems. It delivers 24 mA sink current per output at 3.3 V, supports 5.5-V tolerant inputs/outputs, and achieves 2.6 ns propagation delay at 5 V. It is used in SSD power sequencing, HDMI CEC signal conditioning, and I²C bus voltage translation.

For engineers reviewing the SN74LVC07APWR datasheet, SN74LVC07APWR pinout, SN74LVC07APWR application, or SN74LVC07APWR equivalent, key selection criteria include open-drain drive strength, Ioff-enabled partial-power-down operation, 5.5-V input tolerance across VCC = 1.65–5.5 V, and TSSOP-14 thermal performance (RθJA = 160.3°C/W).

Technical Context

The SN74LVC07APWR implements six independent open-drain CMOS buffers with no internal pull-ups; external pull-up resistors define logic-high levels and drive capability. Its Ioff circuitry actively disables all outputs when VCC = 0 V, blocking back-drive current and enabling live insertion in hot-swap systems.

Each buffer operates with rail-to-rail input compatibility - inputs accept 0–5.5 V regardless of VCC - enabling bidirectional level shifting between 1.8-V, 2.5-V, 3.3-V, and 5-V domains without direction control. Propagation delay remains ≤3.1 ns over –40°C to +125°C at 5 V.

Key Specifications

Pinout & Package

TSSOP-14 package (5.00 mm × 4.40 mm), 1.0-mm maximum height, lead-free NiPdAu finish, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex open-drain buffer applications.

Compared with SN74LVC06APWR, SN74LVC07APWR preserves signal polarity for enable/control lines; compared with 74LVC244APW, it enables shared-bus topologies and voltage-domain bridging without additional components.

Availability

SN74LVC07APWR is available at Aetrix Electronics and suitable for SSD power sequencing, HDMI CEC interfaces, I²C voltage translation, industrial PLC input conditioning, and embedded microcontroller GPIO expansion requiring stable component supply and long-term manufacturability.

Supply support for SN74LVC07APWR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The SN74LVC07APWR belongs to TI's LVC logic family, engineered for low-voltage operation with high noise immunity and interoperability across mixed-supply systems - specifically targeting interface consolidation in space-constrained embedded designs.

FAQ

What is the maximum sink current per output of the SN74LVC07APWR?

The SN74LVC07APWR supports up to 24 mA sink current per output at VCC = 3 V and 2.7 V, and 12 mA at VCC = 2.3 V. This is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 6.5 (Electrical Characteristics) of the official datasheet. The absolute maximum continuous output current is ±50 mA total across all six channels, so proper thermal design is required when operating multiple outputs near their limits. SN74LVC07APWR must not exceed these ratings to ensure reliability.

Does the SN74LVC07APWR support level translation between different supply voltages?

Yes, the SN74LVC07APWR supports bidirectional level translation due to its 5.5-V tolerant inputs and open-drain outputs. Inputs accept 0–5.5 V regardless of VCC (1.65–5.5 V), allowing a 3.3-V-powered SN74LVC07APWR to safely receive 5-V signals. Outputs require an external pull-up to the target domain voltage (e.g., 5 V), enabling translation from 3.3-V logic to 5-V bus levels. This behavior is explicitly described in Section 8.1 and Figure 7 of the datasheet. SN74LVC07APWR does not translate in the push-pull sense but enables robust voltage-domain bridging via open-drain topology.

Can the SN74LVC07APWR be used in hot-swap or partial-power-down systems?

Yes, the SN74LVC07APWR includes Ioff circuitry that disables all outputs when VCC = 0 V, limiting input/output leakage to ±10 µA. This prevents damaging back-current flow when the device is unpowered but connected to live buses - a critical requirement for hot-plug PCIe add-in cards, modular SSDs, or telecom line cards. Section 8.3 and Table 6.5 of the datasheet confirm Ioff functionality and specify test conditions. SN74LVC07APWR maintains this protection across –40°C to +125°C.

What is the propagation delay of the SN74LVC07APWR at 3.3 V?

At VCC = 3.3 V and TA = –40°C to +125°C, the maximum propagation delay (tpd) of the SN74LVC07APWR is 4.1 ns, as specified in Table 6.6 (Switching Characteristics). At 25°C, typical tpd is 3.6 ns. This value applies to both rising and falling edges due to the open-drain architecture (tPLZ = tPZL = tpd). The delay remains stable across temperature and load (CL = 30 pF), making SN74LVC07APWR suitable for timing-critical control paths in real-time embedded systems.

Is a pull-up resistor required for SN74LVC07APWR outputs to function correctly?

Yes, every SN74LVC07APWR output requires an external pull-up resistor to establish a valid logic-high voltage level. Because the outputs are open-drain, they can only sink current - they cannot source it. The pull-up value determines rise time and power consumption: a 2.2-kΩ resistor to 3.3 V yields ~1.5 mA static current and <100 ns rise time into 20 pF; larger values reduce power but increase rise time. Section 9.2.2 and Figure 7 of the datasheet mandate this design practice. Without a pull-up, SN74LVC07APWR outputs remain floating and undefined.