Texas Instruments SN74HC244DWRG4

Overview

SN74HC244DWRG4 from Texas Instruments is an octal noninverting 3-state buffer/line driver IC, organized as two independent 4-bit banks with separate output-enable (OE) controls. It operates from 2V to 6V, delivers ±6mA output drive at 5V, exhibits typical propagation delay of 11ns (VCC = 6V, CL = 50pF), and draws ≤80µA ICC (max) - enabling high-density bus interfacing in memory address, clock distribution, and I/O expansion circuits.

For engineers reviewing the SN74HC244DWRG4 datasheet, SN74HC244DWRG4 pinout, SN74HC244DWRG4 application, or SN74HC244DWRG4 equivalent, key selection criteria include its dual-bank 3-state architecture, SOIC-20 package compatibility, guaranteed operation from –40°C to 125°C, and verified 15-LSTTL load drive capability - critical for robust signal integrity in industrial and telecom infrastructure designs.

Technical Context

The SN74HC244DWRG4 implements two independent 4-bit CMOS buffer banks, each controlled by a dedicated OE input. When OE is low, the corresponding Y outputs replicate A inputs with noninverted logic; when OE is high, all four outputs enter high-impedance state - enabling bidirectional bus arbitration without external logic.

Its standard CMOS inputs require fast transition rates (≤400 ns/V at VCC = 6V) and must be terminated to VCC or GND to prevent floating-induced power dissipation or oscillation. The device supports load capacitances up to 150pF and maintains stable timing across temperature ranges from –40°C to 125°C.

Key Specifications

Pinout & Package

SN74HC244DWRG4 is housed in a 20-pin SOIC (DW) package measuring 12.80mm × 10.3mm (body: 12.8mm × 7.5mm), with gull-wing leads and RoHS-compliant matte tin lead finish. It features 0.65mm lead pitch and is rated MSL Level 2a per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC244DWRG4, SN74HCT244N offers stronger noise immunity in pure 5V environments but lacks 2V–3.3V flexibility, while 74LCX244MTCX delivers superior speed and density at the cost of 5V incompatibility - making SN74HC244DWRG4 the optimal balance for industrial 3.3V/5V hybrid systems.

Availability

SN74HC244DWRG4 is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure equipment, and LED display controllers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for SN74HC244DWRG4 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 over 90 years of innovation in industrial, automotive, and communications markets.

SN74HC244DWRG4 belongs to TI's industry-standard HC logic family, designed specifically for high-density, low-power bus interfacing in memory address drivers, clock distribution networks, and I/O expansion subsystems.

FAQ

What is the operating temperature range for SN74HC244DWRG4?

The SN74HC244DWRG4 is specified for operation from –40°C to +125°C, meeting extended industrial requirements. This range is confirmed in Section 5.3 (Recommended Operating Conditions) and Revision History of the official TI datasheet SCLS130I, where the 2026 revision explicitly updated the upper limit from 85°C to 125°C for SN74HC244 variants including SN74HC244DWRG4.

Does SN74HC244DWRG4 support 3.3V logic levels?

Yes, SN74HC244DWRG4 fully supports 3.3V operation: its recommended VCC range is 2V to 6V, and input thresholds scale with supply voltage (VIH = 2.0V min at VCC = 3.3V per Section 5.3). Output VOH/VOL specs guarantee >3.0V high and <0.4V low at 3.3V, ensuring interoperability with standard 3.3V CMOS interfaces.

How many independent output-enable controls does SN74HC244DWRG4 have?

SN74HC244DWRG4 has two independent active-low output-enable inputs: 1OE (Pin 1) controls Bank 1 outputs (1Y1–1Y4), and 2OE (Pin 19) controls Bank 2 outputs (2Y1–2Y4). This dual-OE architecture allows selective 3-state control of either 4-bit segment without affecting the other, as defined in the Function Table (Section 7.4) and Pin Configuration (Figure 4-1).

What is the maximum capacitive load SN74HC244DWRG4 can drive reliably?

SN74HC244DWRG4 is characterized for loads up to 150pF, with switching specifications (tpd, ten, tdis) fully guaranteed at both 50pF and 150pF in Sections 5.10 and 5.11. At VCC = 6V and TA = 25°C, tpd remains ≤20ns (CL = 50pF) and ≤28ns (CL = 150pF), confirming robust performance into typical PCB trace + connector + receiver input capacitance.

Is SN74HC244DWRG4 pin-compatible with other SN74HC244 variants?

Yes, SN74HC244DWRG4 shares identical pinout and functionality with all SN74HC244 variants in SOIC-20 (DW) packaging, including SN74HC244DR and SN74HC244DWR. The "G4" suffix denotes RoHS-compliant packaging and does not affect electrical behavior or pin assignment - confirmed by TI's Mechanical, Packaging, and Orderable Information (Section 11) and consistent pin diagrams across DW-package variants.