Texas Instruments 74ALVCH16244DGGRE4

Overview

74ALVCH16244DGGRE4 from Texas Instruments is a 16-bit non-inverting 3-state buffer/driver IC operating from 1.65 V to 3.6 V, delivering ±24-mA output drive at 3.3 V with 3 ns max propagation delay, used in memory address buffering, clock distribution, and bus interface applications.

For engineers reviewing the 74ALVCH16244DGGRE4 datasheet, 74ALVCH16244DGGRE4 pinout, 74ALVCH16244DGGRE4 application, or 74ALVCH16244DGGRE4 equivalent, key selection criteria include its 48-pin TSSOP package, bus-hold inputs eliminating external resistors, 3.3-V-compatible 3-state outputs, and operation across –40°C to 85°C industrial temperature range.

Technical Context

The device implements four independent 4-bit buffers with symmetrical active-low output-enable (OE) controls-1OE through 4OE-each enabling its associated 4-bit channel. All inputs feature integrated bus-hold circuitry, maintaining valid logic states without external pullup/pulldown resistors.

It supports flexible configuration as one 16-bit, two 8-bit, or four 4-bit buffers. Output disable timing (tdis) is 4.1 ns min at 3.3 V, and enable timing (ten) is 3 ns min under same conditions, ensuring tight synchronization in high-speed bus systems.

Key Specifications

Pinout & Package

74ALVCH16244DGGRE4 is housed in a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 12.4 mm × 6.1 mm × 1.2 mm body, JEDEC MO-153 compliant, with gull-wing leads and pin 1 indicator in quadrant Q1 per tape-and-reel orientation.

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 74AVC16244DGGR, the 74ALVCH16244DGGRE4 uniquely combines industrial V_CC flexibility (1.65–3.6 V), integrated bus-hold, and guaranteed ±24-mA drive across its full voltage range - making it optimal for ruggedized, mixed-voltage embedded bus interfaces where input stability and output strength are co-critical.

Availability

74ALVCH16244DGGRE4 is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and industrial bus interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74ALVCH16244DGGRE4 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 heritage in high-reliability interface and bus technology.

The ALVCH family was engineered specifically to enhance density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in industrial and communications infrastructure.

FAQ

What is the recommended power-up sequence for 74ALVCH16244DGGRE4 to avoid output contention?

TI recommends tying all OE inputs (1OE–4OE) to VCC through a pullup resistor (minimum value determined by driver sink capability) during power-up. This ensures outputs remain in high-impedance state until VCC stabilizes and system firmware asserts valid control signals. For 74ALVCH16244DGGRE4, this prevents bus conflicts in multi-driver systems before initialization completes.

Does 74ALVCH16244DGGRE4 require external pullup or pulldown resistors on its data inputs?

No. The 74ALVCH16244DGGRE4 integrates active bus-hold circuitry on all A-inputs (1A1–4A4), which maintains the last valid logic state without external components. TI explicitly advises against adding pullup/pulldown resistors when bus-hold is enabled, as they may overload the internal hold current and cause incorrect logic levels.

What is the maximum capacitive load 74ALVCH16244DGGRE4 can drive while maintaining 3 ns propagation delay?

The 3 ns max tpd specification for 74ALVCH16244DGGRE4 is characterized at CL = 50 pF with 3.3-V supply and 25°C ambient. At higher loads (e.g., >75 pF), propagation delay increases nonlinearly; TI's switching characteristics table confirms tpd remains ≤3.6 ns at 2.5 V and CL = 50 pF, confirming robustness for typical board-level capacitance including trace and receiver input loading.

Can 74ALVCH16244DGGRE4 be used in a 1.8-V system with 3.3-V tolerant inputs?

Yes. The 74ALVCH16244DGGRE4 operates down to 1.65 V and accepts input voltages up to VCC + 0.5 V (absolute max 4.6 V). At VCC = 1.8 V, VIH is 0.65 × VCC = 1.17 V and VIL is 0.35 × VCC = 0.63 V - compatible with 1.8-V logic families. Its inputs are not 3.3-V tolerant unless VCC ≥ 2.3 V, so direct connection to 3.3-V signals requires level translation or VCC ≥ 2.3 V.

How does the thermal performance of 74ALVCH16244DGGRE4 compare across its supported packages?

The 74ALVCH16244DGGRE4 in TSSOP-DGG has θJA = 58°C/W, versus 63°C/W for SSOP-DL and 42°C/W for VFBGA-GQL. This means the DGG package dissipates heat more effectively than DL but less than GQL. For continuous 24-mA output operation at 3.3 V, junction temperature rise remains within safe limits (<85°C) in still air up to ~70 mW total power dissipation - well within the device's capability under typical industrial derating.