Texas Instruments SN74LVCH16244ADGVR

Overview

SN74LVCH16244ADGVR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65 V to 3.6 V V_CC operation. It features four independent 4-bit sections (1OE–4OE), 5.5 V tolerant inputs, I_off support for live insertion, bus-hold on all data inputs, and a max propagation delay of 4.1 ns at 3.3 V. It serves as a level-translating bus driver in memory address, clock, and data bus interfaces.

For engineers reviewing the SN74LVCH16244ADGVR datasheet, SN74LVCH16244ADGVR pinout, SN74LVCH16244ADGVR application, or SN74LVCH16244ADGVR equivalent, key selection criteria include its 48-pin TVSOP package, 3.6 V absolute max input tolerance, I_off partial-power-down capability, bus-hold functionality eliminating external resistors, and compatibility with mixed 3.3 V/5 V system environments.

Technical Context

The SN74LVCH16244ADGVR implements four independent 4-bit noninverting buffer sections, each with an active-low output-enable (OE) input controlling Y1–Y4 outputs. Its CMOS design supports symmetrical drive strength (±24 mA at 3 V), low ground bounce (<0.8 V VOLP), and output undershoot >2 V VOHV at 3.3 V.

It integrates I_off circuitry to disable outputs and block current backflow during power-down, and bus-hold circuitry on all 16 A-inputs to maintain valid logic states without external pullups. Inputs tolerate up to 5.5 V regardless of V_CC, enabling true down-translation from 5 V to 3.3 V or 1.8 V systems.

Key Specifications

Pinout & Package

SN74LVCH16244ADGVR is packaged in a 48-pin Thin Very Small Outline Package (TVSOP, DGV), body size 9.70 mm × 4.40 mm, with 0.4 mm lead pitch and RoHS-compliant NiPdAu finish. Pin 1 is marked by a beveled corner; the package is moisture-sensitive Level-1 (unlimited floor life at ≤30°C/60% RH).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/driver applications.

Compared with SN74LVC16244ADGVR and 74ALVCH16244DLR, SN74LVCH16244ADGVR uniquely delivers integrated bus-hold-reducing external components-and matches the compact TVSOP-48 footprint while maintaining full 5.5 V input tolerance and I_off protection across the entire 1.65–3.6 V range.

Availability

SN74LVCH16244ADGVR is available at Aetrix Electronics and suitable for servers, network switches, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for SN74LVCH16244ADGVR 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 expertise in high-reliability interface and bus technologies.

The SN74LVCH16244ADGVR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically to increase density and performance in memory address drivers, clock distribution networks, and 3-state bus receivers/transmitters.

FAQ

What is the maximum input voltage the SN74LVCH16244ADGVR can tolerate?

The SN74LVCH16244ADGVR accepts input voltages up to 5.5 V across its entire valid V_CC range (1.65 V to 3.6 V). This overvoltage tolerance is specified in the Absolute Maximum Ratings table and enables reliable interfacing with 5 V TTL or CMOS logic without external level-shifting circuitry. The SN74LVCH16244ADGVR maintains this rating regardless of whether V_CC is set to 1.8 V, 2.5 V, or 3.3 V.

Does the SN74LVCH16244ADGVR support partial power-down operation?

Yes, the SN74LVCH16244ADGVR fully supports partial power-down via its I_off feature. When V_CC = 0 V, the outputs are disabled and high-impedance, and I_off limits current flow to ±10 µA, preventing damaging back-current from live buses. This capability is validated per JESD78 and is critical for hot-swap, power-gated subsystems, and mixed-rail designs where sections power up/down asynchronously. The SN74LVCH16244ADGVR implements this without external circuitry.

How does the bus-hold function work on the SN74LVCH16244ADGVR?

The SN74LVCH16244ADGVR integrates active bus-hold circuitry on all 16 A-inputs (1A1–4A4), which detects the last valid logic state and applies weak feedback to maintain it when the input floats. This eliminates the need for external pullup or pulldown resistors. Bus-hold current is ±45 µA at 3 V, and the feature operates across the full temperature range (–40°C to 125°C). Using external resistors with the SN74LVCH16244ADGVR is not recommended, as it may cause contention.

What is the propagation delay of the SN74LVCH16244ADGVR at 3.3 V?

At V_CC = 3.3 V and T_A = 25°C, the maximum propagation delay (t_pd) of the SN74LVCH16244ADGVR is 4.1 ns, as specified in the Switching Characteristics table. Typical t_pd is 1.1 ns under the same conditions. This delay applies to transitions from any A-input to its corresponding Y-output (e.g., 1A1 → 1Y1) and is measured with 30 pF load and ±0.3 V transition thresholds. The SN74LVCH16244ADGVR maintains sub-5 ns performance across its full operating temperature range.

Which package type does the SN74LVCH16244ADGVR use, and what are its key mechanical properties?

The SN74LVCH16244ADGVR uses the TVSOP-48 (DGV) package: 48-pin, 9.70 mm × 4.40 mm body, 0.4 mm lead pitch, and 1.2 mm max height. It features NiPdAu lead finish, complies with RoHS, and carries a Moisture Sensitivity Level (MSL) rating of Level-1 (unlimited floor life at ≤30°C/60% RH). The SN74LVCH16244ADGVR is supplied in tape-and-reel format (2000 units per reel) and is optimized for high-density surface-mount assembly.