Texas Instruments SN74LV540ADGVR

Overview

SN74LV540ADGVR from Texas Instruments is an octal inverting buffer/driver with 3-state outputs, designed for 2 V to 5.5 V operation and used to drive bus lines or memory address registers. It features dual active-low output enables (OE1, OE2), supports mixed-mode voltage translation, provides I_off for partial-power-down mode, and delivers ≤8.5 ns propagation delay at 5 V.

For engineers reviewing the SN74LV540ADGVR datasheet, SN74LV540ADGVR pinout, SN74LV540ADGVR application, or SN74LV540ADGVR equivalent, this device is selected for low-ringing bus interfacing in industrial, medical, and telecom systems where 3-state control, wide V_CC range, and input overvoltage tolerance (up to 5.5 V) are critical.

Technical Context

The SN74LV540ADGVR implements eight independent inverting buffers, each with a two-input AND gate logic structure for 3-state control: outputs enter high-impedance when either OE1 or OE2 is high. Its inputs accept up to 5.5 V regardless of V_CC, enabling down-translation from higher-voltage domains into 2.5 V or 3.3 V logic systems.

It exhibits controlled edge rates to suppress output ringing, with typical ground bounce (V_OLP) < 0.8 V and undershoot (V_OHV) > 2.3 V at 3.3 V/25°C. Latch-up immunity exceeds 250 mA per JESD17, and I_off limits current flow when V_CC = 0 V, supporting hot-insertion and power sequencing safety.

Key Specifications

Pinout & Package

SN74LV540ADGVR uses a 20-pin TVSOP (Thin Very Small Outline Package) with 5.00 mm × 4.40 mm body size, 0.65 mm pitch, and exposed pad for thermal enhancement. Pin 1 index is located at top-left corner with quadrants aligned per JEDEC standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal inverting buffer applications.

Compared with SN74LV540ADGVR, SN74LVC541APW offers speed advantage but requires functional redesign for polarity match, while 74LVX540M preserves inversion but sacrifices modern packaging, thermal efficiency, and long-term supply assurance.

Availability

SN74LV540ADGVR is available at Aetrix Electronics and suitable for industrial bus interface, patient monitoring systems, wireless infrastructure baseband, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LV540ADGVR 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 leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The SN74LV540ADGVR belongs to TI's LV logic family, engineered for low-voltage, high-noise-immunity digital interfacing in harsh environments - targeting applications demanding mixed-voltage compatibility, power sequencing safety, and extended temperature operation.

FAQ

What is the maximum propagation delay of the SN74LV540ADGVR at 3.3 V?

The SN74LV540ADGVR has a maximum propagation delay (t_pd) of 9.5 ns at V_CC = 3.3 V, CL = 15 pF, and TA = –40°C to +125°C. This value is specified in the Switching Characteristics table (Section 6.7) of the official datasheet and reflects worst-case timing under full industrial temperature range conditions. The SN74LV540ADGVR maintains consistent performance across its operating voltage window, making it suitable for timing-sensitive bus buffering.

Does the SN74LV540ADGVR support hot-swap or partial-power-down operation?

Yes, the SN74LV540ADGVR supports partial-power-down via its I_off feature, which limits input/output leakage to ≤5 µA when V_CC = 0 V. This prevents back-current flow between powered and unpowered sections of a system, enabling safe hot-plug insertion and power sequencing in modular architectures. The SN74LV540ADGVR is explicitly characterized for this behavior in Section 6.5 of its datasheet.

What package type does the SN74LV540ADGVR use, and what are its key mechanical dimensions?

The SN74LV540ADGVR uses a 20-pin TVSOP (Thin Very Small Outline Package) with drawing code DGV. Its nominal body size is 5.00 mm × 4.40 mm, with 0.65 mm lead pitch and maximum height of 1.2 mm. The package includes an exposed thermal pad and conforms to JEDEC MO-175 standards. These dimensions are confirmed in TI's Package Information table and Mechanical Drawing DB0020A.

Can the SN74LV540ADGVR interface between 5 V and 3.3 V logic domains?

Yes, the SN74LV540ADGVR supports mixed-mode voltage operation: its inputs tolerate voltages up to 5.5 V regardless of V_CC, allowing direct connection to 5 V sources while operating from a 3.3 V supply. Outputs swing rail-to-rail between GND and V_CC, so they deliver valid 3.3 V logic levels. This capability is documented in Section 1 (Features) and Section 8.3 (Feature Description) of the SN74LV540ADGVR datasheet.

How many output enable inputs does the SN74LV540ADGVR have, and how do they function?

The SN74LV540ADGVR has two active-low output enable inputs: OE1 (Pin 1) and OE2 (Pin 19). They feed a two-input AND gate controlling all eight outputs - if either OE1 or OE2 is high, all Y1–Y8 outputs enter high-impedance state. This dual-enable architecture allows flexible bus arbitration, such as grouping four buffers under OE1 and four under OE2. The logic is verified in the Function Table (Table 8-1) and Detailed Description (Section 8.1).