Texas Instruments SN74ABTH16244DGGR

Overview

SN74ABTH16244DGGR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC designed for high-density bus interface applications, featuring –32-mA high-level output drive, 64-mA low-level output drive, and bus-hold circuitry on all data inputs. It operates from 4.5 V to 5.5 V over –40°C to 85°C and is packaged in a 48-pin TSSOP (DGG) with distributed V_CC/GND pins to suppress switching noise.

For engineers reviewing the SN74ABTH16244DGGR datasheet, SN74ABTH16244DGGR pinout, SN74ABTH16244DGGR application, or SN74ABTH16244DGGR equivalent, key selection criteria include 3-state bus driving capability, TTL-compatible input thresholds, output ground bounce <1 V at 5 V, flow-through pin architecture for PCB layout optimization, and integrated bus-hold eliminating external pull resistors.

Technical Context

This device implements four independent 4-bit noninverting buffers, each with an active-low 3-state output-enable (OE) control. Each buffer section supports true (noninverting) logic transfer with symmetrical OE polarity and latch-up immunity exceeding 500 mA per JESD 17.

Its EPIC-II^B BiCMOS process enables low power dissipation while delivering high-drive outputs and distributed power/ground pinning to minimize simultaneous switching noise. Bus-hold circuitry maintains valid logic levels on floating inputs without external components.

Key Specifications

Pinout & Package

SN74ABTH16244DGGR uses a 48-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 12.6 mm × 6.1 mm × 1.2 mm max height, JEDEC MO-153 compliant, with pin 1 marked in quadrant Q1 on tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74ABTH16244DGGR, SN74LVC16244ADGGR enables lower-voltage operation but sacrifices bus-hold and drive strength, while 74ABT16244CMTD offers identical functionality and pinout with minor trade-offs in quiescent current and thermal resistance.

Availability

SN74ABTH16244DGGR is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and legacy bus interface designs requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74ABTH16244DGGR 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 connectivity technologies, with decades of experience in high-reliability logic and interface solutions.

The ABTH family was engineered for high-speed, high-drive 3-state bus interfacing in memory, clock, and backplane applications-prioritizing noise immunity, layout efficiency, and industrial temperature operation.

FAQ

What is the recommended power-up sequence for SN74ABTH16244DGGR to avoid bus contention?

OE inputs must be held high (via pullup resistor to V_CC) during power-up and power-down to guarantee all outputs remain in high-impedance state. The minimum pullup resistor value depends on the driver's current-sinking capability; TI recommends ≥10 kΩ for most applications. This prevents unintended bus driving before system initialization completes. SN74ABTH16244DGGR does not include internal power-on reset, so external sequencing remains essential.

Does SN74ABTH16244DGGR support mixed-voltage operation between input and output sides?

No. SN74ABTH16244DGGR is a single-supply 5-V device with TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V) and outputs referenced to the same V_CC. It does not support level-shifting or dual-supply operation. Inputs driven below 0.8 V or above V_CC risk violating absolute maximum ratings or causing excessive current flow. SN74ABTH16244DGGR must operate within its specified 4.5–5.5 V V_CC range.

How does the bus-hold circuitry in SN74ABTH16244DGGR behave under noise or ESD stress?

The bus-hold circuitry in SN74ABTH16244DGGR maintains valid logic levels on floating inputs using weak feedback transistors (±40 µA hold current). It meets MIL-STD-883 Class 2000-V HBM ESD rating and is robust against typical board-level noise. However, it is not a substitute for proper grounding or shielding in high-noise environments. SN74ABTH16244DGGR bus-hold will not latch incorrect states under normal ESD events, but sustained overvoltage beyond ±0.5 V on inputs should be avoided per absolute maximum ratings.

Can SN74ABTH16244DGGR be used as a level translator between 3.3-V and 5-V logic domains?

No. SN74ABTH16244DGGR has only one V_CC pin and is not designed for level translation. Its inputs require TTL-compatible thresholds referenced to 5 V, and outputs swing rail-to-rail relative to that same 5-V supply. Driving SN74ABTH16244DGGR inputs from 3.3-V logic may result in marginal V_IH margin (2.0 V min vs. 3.3 V nominal), risking unreliable operation. For true level translation, dedicated translators like TXB0108 or SN74AVCH16T245 are required instead of SN74ABTH16244DGGR.

What is the maximum capacitive load SN74ABTH16244DGGR can drive while maintaining specified timing?

SN74ABTH16244DGGR switching characteristics (e.g., t_PLH, t_PHL) are characterized at C_L = 50 pF. While the device can drive heavier loads due to its 64-mA I_OL, propagation delay increases linearly with load capacitance. For C_L > 100 pF, timing margins degrade significantly; signal integrity (ringing, overshoot) also worsens. To maintain full spec compliance, keep total load ≤50 pF per output. SN74ABTH16244DGGR remains functional beyond this, but system-level timing validation is required.