Texas Instruments SN74LV273ARGYR

Overview

SN74LV273ARGYR from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with asynchronous clear, designed for 2-V to 5.5-V V_CC operation. It features 10.5 ns maximum propagation delay at 5 V, I_off support for partial-power-down mode, and balanced CMOS push-pull outputs. It is used in industrial I/O modules and HMI data latching where voltage-level translation and noise-immune edge-triggered storage are required.

For engineers reviewing the SN74LV273ARGYR datasheet, SN74LV273ARGYR pinout, SN74LV273ARGYR application, or SN74LV273ARGYR equivalent, key selection criteria include its 20-pin VQFN (RGY) package, 8-bit synchronous latch function with independent D/Q mapping, wide supply range compatibility, and guaranteed performance across –40°C to 125°C ambient temperature.

Technical Context

The SN74LV273ARGYR implements eight independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each flip-flop captures D-input data on the rising edge of CLK and holds it until the next active clock edge or CLR assertion. The device uses standard CMOS logic with rail-to-rail output swing and supports mixed-mode voltage operation - inputs tolerate up to 5.5 V regardless of V_CC level.

Its I_off circuitry actively disables all outputs when V_CC = 0 V, preventing backflow current during power sequencing. Latch-up immunity exceeds 250 mA per JESD17, and output ground bounce (V_OLP) remains below 0.8 V at 3.3 V/25°C - critical for stable signal integrity in dense PCB layouts.

Key Specifications

Pinout & Package

SN74LV273ARGYR is housed in a 20-pin VQFN package (RGY) measuring 4.5 mm × 3.5 mm with exposed thermal pad. The package supports fine-pitch surface-mount assembly and provides low thermal resistance (R_θJA = 37.1°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with SN74LV273ARGYR, SN74LVC273PW offers identical functionality but inferior thermal performance in space-constrained designs, while 74LVX273M sacrifices supply flexibility and robustness for lower cost in narrow-voltage applications.

Availability

SN74LV273ARGYR is available at Aetrix Electronics and suitable for industrial I/O modules, power substation controls, and human machine interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LV273ARGYR 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 specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74LV273A belongs to TI's LV family of low-voltage, high-noise-immunity logic devices, engineered for reliable data latching in electrically harsh industrial control and automation systems.

FAQ

What is the maximum clock frequency supported by SN74LV273ARGYR at 3.3 V?

At V_CC = 3.3 V ± 0.3 V and CL = 15 pF, SN74LV273ARGYR supports a maximum clock frequency (f_max) of 140 MHz under typical conditions and 65 MHz across the full –40°C to 125°C operating range. This is derived from t_pd = 7.1 ns (typ) and setup/hold timing margins specified in Section 6.10 of the datasheet.

Does SN74LV273ARGYR support partial-power-down mode, and how is it implemented?

Yes, SN74LV273ARGYR supports partial-power-down mode via its I_off feature. When V_CC = 0 V, internal circuitry disables all outputs, limiting leakage to ≤5 µA per I/O. This prevents damaging current backflow during hot-swap or staggered power sequencing - a confirmed behavior documented in Section 8.3.3 and Electrical Characteristics Table 6.5.

What is the purpose of the exposed thermal pad on the SN74LV273ARGYR RGY package?

The exposed thermal pad on SN74LV273ARGYR is internally connected to GND and serves two primary functions: it reduces junction-to-board thermal resistance (R_θJB = 14.9°C/W) for improved power dissipation, and enhances EMI suppression when soldered to a solid GND plane. Its use is mandatory for thermal compliance per Section 6.4 of the datasheet.

Can SN74LV273ARGYR inputs accept 5 V signals when powered from 3.3 V?

Yes, SN74LV273ARGYR inputs are 5.5 V tolerant regardless of V_CC level. When V_CC = 3.3 V, inputs accept VI up to 5.5 V - a confirmed specification in Absolute Maximum Ratings (Section 6.1) and Recommended Operating Conditions (Section 6.3). This enables seamless level translation without external components.

How does the asynchronous CLR pin behave in SN74LV273ARGYR?

The CLR pin on SN74LV273ARGYR is active-low and asynchronous: asserting CLR = LOW immediately forces all eight Q outputs to LOW, overriding clock and data inputs. Release of CLR returns the flip-flops to normal operation, retaining the last-latched D-input state. This behavior is verified in the Function Table (Section 8.4) and Pin Functions (Section 5.1).