Texas Instruments SN74ALVC162820DL

Overview

SN74ALVC162820DL from Texas Instruments is a 3.3-V, 10-bit edge-triggered D-type flip-flop with dual outputs per bit (Q1/Q2), integrated 26-Ω series-damping resistors, and 3-state outputs controlled by two independent OE inputs. It operates from –40°C to 85°C, supports unregulated battery operation down to 2.7 V, and is designed for high-density bus interface applications in telecom backplanes and industrial control modules.

For engineers reviewing the SN74ALVC162820DL datasheet, SN74ALVC162820DL pinout, SN74ALVC162820DL application, or SN74ALVC162820DL equivalent, key selection criteria include its dual-output architecture, on-die series termination, bus-hold input retention, 3.3-V ±0.3-V supply tolerance, and DL-package thermal performance (1.4 W at 55°C).

Technical Context

The SN74ALVC162820DL implements ten independent D-type flip-flops, each triggered on the positive clock edge, with separate Q1 and Q2 true outputs per channel. Its dual-output structure enables simultaneous signal routing to parallel paths without external fanout buffers.

Two buffered output-enable inputs (1OE and 2OE) independently control groups of outputs into high-impedance states without affecting internal latch operation. Bus-hold circuitry maintains valid logic levels on all ten D inputs when floating, eliminating external pullup/pulldown components.

Key Specifications

Pinout & Package

SN74ALVC162820DL uses a 56-pin Shrink Small-Outline (DL) package with 0.5-mm lead pitch and exposed thermal pad. Pin layout follows TI's standard Widebus™ topology optimized for signal integrity and PCB routing density.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit dual-output flip-flop applications.

Compared with SN74ALVC162820DL, SN74ALVC16373DL offers transparent latching instead of edge-triggered storage and lacks dual outputs and series damping, while SN74LVC16373DGGR omits bus-hold and integrated termination-both require additional board-level components to match SN74ALVC162820DL's signal integrity and robustness in noisy industrial environments.

Availability

SN74ALVC162820DL is available at Aetrix Electronics and suitable for telecom backplane interface, industrial PLC I/O module, and automotive ADAS camera link applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SN74ALVC162820DL 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, with decades of experience in high-reliability industrial and communications ICs.

The SN74ALVC162820DL belongs to TI's ALVC Widebus™ family, engineered for low-voltage, high-density bus interfacing in systems demanding signal integrity, ESD robustness, and thermal efficiency in compact packages.

FAQ

What is the maximum clock frequency supported by the SN74ALVC162820DL?

The SN74ALVC162820DL has a typical propagation delay of 3.5 ns at VCC = 3.3 V, enabling reliable operation up to approximately 150 MHz in well-terminated systems. Maximum usable frequency depends on board layout, load capacitance, and termination - actual system-level timing must be verified with worst-case setup/hold analysis using the SN74ALVC162820DL datasheet's tSU and tH values.

Does the SN74ALVC162820DL require external pull-up or pull-down resistors on its D inputs?

No, the SN74ALVC162820DL includes active bus-hold circuitry on all ten D inputs, which maintains a valid logic state when inputs are floating. This eliminates the need for external pull-up or pull-down resistors in applications such as hot-swap interfaces or unconnected test points, reducing BOM count and improving reliability in the SN74ALVC162820DL-based design.

How do the dual outputs (Q1 and Q2) of each bit differ in functionality within the SN74ALVC162820DL?

Within the SN74ALVC162820DL, Q1 and Q2 for each bit are electrically identical true outputs - both replicate the same latched D value after the positive CLK edge. They are physically separate pins with individual 26-Ω series resistors, allowing independent routing to different loads (e.g., primary bus and diagnostic monitor) without signal degradation or added fanout delay.

Can the SN74ALVC162820DL operate with a 2.5-V supply voltage?

No, the SN74ALVC162820DL is specified for 2.7 V to 3.6 V operation per its recommended operating conditions. At 2.5 V, parameters including VOL, VOH, tPD, and bus-hold strength fall outside guaranteed limits, risking timing violations and logic instability. For 2.5-V systems, consider TI's AVC or LVT families explicitly rated for that voltage range instead of the SN74ALVC162820DL.

What thermal considerations apply to the SN74ALVC162820DL in continuous operation?

The SN74ALVC162820DL in the DL package has a maximum power dissipation of 1.4 W at TA = 55°C in still air. To maintain reliability, ensure adequate PCB copper area (≥2 in² internal/external planes), use thermal vias under the exposed pad, and verify junction temperature stays below 125°C using θJA = 71°C/W. Derate power linearly above 55°C ambient per the SN74ALVC162820DL thermal characteristics table.