Texas Instruments 74LVCH16244ADGGRG4

Overview

74LVCH16244ADGGRG4 from Texas Instruments is a 16-bit noninverting 3-state buffer/driver with four independent 4-bit sections, operating from 1.65 V to 3.6 V, supporting 5.5-V-tolerant inputs and delivering ≤4.1 ns propagation delay at 3.3 V - used for memory address buffering, bus isolation, and level translation in server backplanes and telecom infrastructure.

For engineers reviewing the 74LVCH16244ADGGRG4 datasheet, 74LVCH16244ADGGRG4 pinout, 74LVCH16244ADGGRG4 application, or 74LVCH16244ADGGRG4 equivalent, key selection criteria include Ioff-enabled live insertion support, bus-hold on all inputs eliminating external resistors, symmetrical active-low OE control per 4-bit group, and mixed-voltage (3.3 V/5 V) signal interfacing capability.

Technical Context

The 74LVCH16244ADGGRG4 implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) input controlling high-impedance state on its Y outputs. All inputs feature bus-hold circuitry and tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling robust down-translation from 5-V logic domains to 3.3-V systems.

Ioff protection disables outputs and blocks current backflow when VCC = 0 V, supporting partial-power-down operation. Propagation delay (tpd) is specified at ≤4.1 ns (max) at 3.3 V, with output enable/disable times (ten/tdis) ≤4.6 ns and ≤5.8 ns respectively - critical for high-speed bus arbitration and clock distribution timing margins.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.50 mm × 6.10 mm body, 0.5-mm pitch, 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 16-bit 3-state buffer applications.

Compared with SN74LVC16244ADGGR and 74ALVCH16244DLR, the 74LVCH16244ADGGRG4 uniquely combines 5.5-V input tolerance, Ioff, and bus-hold in a TSSOP-48 package - making it the only option for hot-pluggable, mixed-voltage, resistorless-bus applications without sacrificing speed or density.

Availability

74LVCH16244ADGGRG4 is available at Aetrix Electronics and suitable for server backplanes, telecom switch fabrics, and notebook address isolation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74LVCH16244ADGGRG4 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 over 50 years of innovation in high-reliability interface and power management ICs.

The 74LVCH16244ADGGRG4 belongs to TI's Widebus™ family - designed specifically for high-density, low-skew memory addressing, clock distribution, and bus isolation in enterprise computing and communications infrastructure.

FAQ

What is the maximum input voltage rating for 74LVCH16244ADGGRG4?

The 74LVCH16244ADGGRG4 supports input voltages up to 5.5 V across its entire valid VCC range (1.65 V to 3.6 V). This overvoltage tolerance enables direct interfacing with 5-V logic families without external level-shifting components, and is explicitly verified in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the SCES494B datasheet.

Does 74LVCH16244ADGGRG4 support live insertion or hot-swap applications?

Yes, the 74LVCH16244ADGGRG4 includes Ioff circuitry that disables outputs and blocks current backflow when VCC = 0 V - a requirement for safe live insertion in modular systems like telecom line cards and server blades. This feature is documented in the Features, Description, and Device Functional Modes sections of the official datasheet.

How many independent output-enable controls does 74LVCH16244ADGGRG4 have?

The 74LVCH16244ADGGRG4 has four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE - each controlling a dedicated 4-bit buffer section (1Y1–1Y4, 2Y1–2Y4, etc.). This allows granular bus isolation, such as enabling only memory address bits A0–A3 while holding A4–A15 in high-Z during partial access cycles.

Is external pullup resistance required on OE pins of 74LVCH16244ADGGRG4 during power-up?

Yes - to ensure outputs remain in high-impedance state during power-up or power-down transients, each OE pin should be tied to VCC through a pullup resistor. The minimum value depends on the driver's current-sinking capability; TI recommends values ≥10 kΩ for typical use, as stated in the Overview and Application Information sections of the SCES494B datasheet.

What package type and dimensions does 74LVCH16244ADGGRG4 use?

The 74LVCH16244ADGGRG4 uses a TSSOP-48 (DGG) package with nominal body dimensions of 12.50 mm × 6.10 mm and 0.5-mm lead pitch. It features NiPdAu lead finish, RoHS compliance, and moisture sensitivity level 1 (MSL-1), as confirmed in TI's Packaging Information addendum and mechanical drawings.