Texas Instruments 74ACT16823DL

Overview

74ACT16823DL from Texas Instruments is an 18-bit bus-interface D-type flip-flop with 3-state outputs, designed for high-capacitance bus driving in wide data/address paths. It operates at 5 V, supports 90 MHz clock frequency, features TTL-compatible inputs, and delivers ±24 mA output drive. It is used in parity bus interfacing and I/O port buffering within industrial control backplanes.

For engineers reviewing the 74ACT16823DL datasheet, 74ACT16823DL pinout, 74ACT16823DL application, or 74ACT16823DL equivalent, key selection criteria include its dual 9-bit configurable operation, flow-through architecture for PCB layout optimization, distributed V_CC/GND pinning for noise suppression, and -40°C to +85°C industrial temperature rating.

Technical Context

The 74ACT16823DL implements two independent 9-bit D-type flip-flop sections, each with dedicated clock (CLK), clock-enable (CLKEN), clear (CLR), and output-enable (OE) controls. Its EPIC™ 1-µm CMOS process ensures TTL-level input compatibility while maintaining CMOS power efficiency.

Each section supports synchronous data latching on CLK rising edge when CLKEN is low; CLKEN high disables clock propagation to retain output state. OE independently places all 9 outputs into high-impedance without affecting internal register operation or data retention.

Key Specifications

Pinout & Package

74ACT16823DL is packaged in a 56-pin Shrink Small-Outline Package (SSOP-DL), 380-mil body width, 25-mil pin pitch, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus-interface flip-flop applications.

Compared with 74ACT16823DL, the 74ACT16374DL offers reduced channel count and consolidated control, while SN74LVC16373ADGGR targets low-voltage operation at the cost of voltage compatibility and functional granularity - making 74ACT16823DL uniquely suited for 5 V, dual-domain, noise-sensitive bus interfacing.

Availability

74ACT16823DL is available at Aetrix Electronics and suitable for industrial backplane buffering, parity bus interfacing, I/O port expansion, and legacy system bus isolation requiring stable component supply across extended temperature ranges.

Supply support for 74ACT16823DL 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 industrial-grade logic families.

The 74ACT16823DL belongs to TI's Widebus™ family - engineered specifically for high-speed, noise-resilient bus interfacing in industrial, telecom, and computing infrastructure where signal integrity and thermal robustness are critical.

FAQ

What is the operating voltage range for the 74ACT16823DL?

The 74ACT16823DL operates over a supply voltage range of 4.5 V to 5.5 V. This 5 V nominal range ensures compatibility with standard TTL and CMOS logic systems while providing margin against rail droop in industrial power supplies. Absolute maximum ratings extend to –0.5 V to 7 V, but sustained operation outside 4.5–5.5 V is not recommended per TI's recommended operating conditions.

Does the 74ACT16823DL support independent control of its two 9-bit sections?

Yes, the 74ACT16823DL provides fully independent control for each 9-bit section: separate 1CLK/1CLKEN/1CLR/1OE and 2CLK/2CLKEN/2CLR/2OE inputs allow asynchronous reset, clock gating, and output enable per section. This enables use cases like staggered data capture or selective bus arbitration - a capability confirmed in the function table and logic diagram of the SCAS160B datasheet.

What package type and pin count does the 74ACT16823DL use?

The 74ACT16823DL uses a 56-pin Shrink Small-Outline Package (SSOP), designated DL by Texas Instruments. It has a 380-mil body width and 25-mil center-to-center pin pitch. The package includes 12 V_CC and 12 GND pins distributed across the perimeter to suppress high-speed switching noise - a key feature documented in the "Package Options" section of the datasheet.

How does the flow-through architecture of the 74ACT16823DL benefit PCB layout?

The 74ACT16823DL's flow-through architecture aligns data inputs on one side and corresponding outputs on the opposite side (e.g., 1D1–1D9 on left, 1Q1–1Q9 on right). This minimizes layer transitions and trace crossovers in high-density layouts - directly reducing parasitic inductance and improving signal integrity for wide parallel buses, as emphasized in the "Flow-Through Architecture Optimizes PCB Layout" feature bullet.

Can the 74ACT16823DL be used in systems requiring hot-swap or dynamic bus sharing?

Yes, the 74ACT16823DL supports hot-swap and dynamic bus sharing via its buffered output-enable (OE) input. When OE is asserted, outputs enter high-impedance without affecting internal register state - allowing new data to be loaded or retained while the bus is released. This behavior is explicitly stated in the datasheet: "OE does not affect the internal operation… Old data can be retained or new data can be entered while the outputs are in the high-impedance state."