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Texas Instruments 74ACT16623DLR
- Part No.:
- 74ACT16623DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16623DLR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,334
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Product details
Overview
74ACT16623DLR from Texas Instruments is a 16-bit dual 8-bit bus transceiver with 3-state outputs, TTL-voltage-compatible inputs, flow-through pin architecture for optimized PCB layout, and distributed VCC/GND pins to suppress high-speed switching noise. It operates from –40°C to 85°C at 4.5–5.5 V, supports bidirectional A↔B data transfer under independent OEBA/OEAB control, and is used in industrial backplane interfaces requiring isolation and bus storage capability.
For engineers reviewing the 74ACT16623DLR datasheet, 74ACT16623DLR pinout, 74ACT16623DLR application, or 74ACT16623DLR equivalent, this page delivers verified package mapping (SSOP-48), functional timing parameters (tPLH = 4.2 ns typ), true 3-state behavior under dual-enable storage mode, and confirmed alternatives for legacy 16-bit bus interface designs.
Technical Context
The 74ACT16623DLR implements two independent 8-bit transceiver sections, each with separate output-enable inputs (OEBA, OEAB) enabling asymmetric direction control: low OEBA enables B→A transmission; low OEAB enables A→B transmission. Simultaneous low on both enables bidirectional bus storage via feedback reinforcement.
It uses TI's EPIC™ 1-µm CMOS process, features TTL-compatible input thresholds (VIL = 0.8 V, VVIH = 2 V), guarantees ±24 mA output drive at VCC = 4.5 V, and maintains 16 pF I/O capacitance - critical for signal integrity in high-density backplane routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL/CMOS systems and margin against rail droop. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads at ≤10 ns propagation delay without external buffering. |
| Propagation Delay | tPLH/tPHL = 4.2–10.4 ns - enables reliable 50+ MHz bus operation with deterministic timing margins. |
| I/O Capacitance | Cio = 16 pF - minimizes capacitive loading on shared data buses, preserving edge rate and reducing crosstalk. |
| Power Dissipation | 1.2 W max (TA = 55°C) - supports continuous operation in compact SSOP-48 packages without forced airflow. |
| Input Compatibility | TTL-voltage level (VIL ≤ 0.8 V, VVIH ≥ 2 V) - allows direct interfacing with legacy 74LS/74ALS logic without level shifters. |
Pinout & Package
74ACT16623DLR is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.025-inch (0.635 mm) pin pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB | Output Enable (B→A) | Active-low control per 8-bit section; when low, drives A-bus from B-bus; high places A outputs in high-impedance state. |
| 1OEBA, 2OEBA | Output Enable (A→B) | Active-low control per 8-bit section; when low, drives B-bus from A-bus; high places B outputs in high-impedance state. |
| 1A1–1A8, 2A1–2A8 | A-side Data Inputs/Outputs | Bidirectional I/O pins for first and second 8-bit A-bus segments; function as inputs or outputs depending on OEBA state. |
| 1B1–1B8, 2B1–2B8 | B-side Data Inputs/Outputs | Bidirectional I/O pins for first and second 8-bit B-bus segments; function as inputs or outputs depending on OEAB state. |
| VCC (Pins 7, 18, 29, 40) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power delivery integrity across the 48-pin array. |
| GND (Pins 4, 10, 15, 21, 26, 32, 37, 43) | Ground Reference | Eight dedicated GND pins provide low-inductance return paths, essential for maintaining signal integrity at >25 MHz bus rates. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Input and output pins aligned on opposite sides (e.g., A1–A8 on left, B1–B8 on right) enabling straight-layer PCB trace routing and eliminating layer jumps. |
| Dual-output-enable storage mode | Simultaneous assertion of OEBA and OEAB causes each port to reinforce its own state, retaining bus values without external latches or clocking. |
| Distributed VCC/GND pinning | Four VCC and eight GND pins interleaved across the package minimize ground bounce and supply rail collapse during 16-bit parallel switching. |
| TTL-input voltage compatibility | Accepts standard 74LS/74ALS logic levels directly - eliminates need for level translators in mixed-logic-system upgrades. |
| EPIC™ 1-µm CMOS process | Delivers ACT-series speed/power balance: 10 ns typical propagation with <80 µA static ICC, enabling low-noise, high-density bus interfaces. |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
|
Use Scenario: Interfacing a microcontroller local bus to a multi-slot VMEbus or STD bus backplane where bidirectional data flow and hot-swap isolation are required. IC Role / Device Role / Timing Role: 16-bit bidirectional bus transceiver providing direction-controlled data coupling between CPU and peripheral slots, with 3-state isolation during slot insertion/removal. Use Value: Enables safe hot-plug operation by isolating unpowered slots via OE control, while maintaining full 16-bit throughput (≤10 ns delay) and noise immunity via distributed power pins. |
Use Scenario: Upgrading a 1980s-era industrial PLC mainboard using 74LS245-based data paths to support higher-speed peripherals without redesigning the entire backplane. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for dual 74LS245 configurations, delivering ACT-speed performance and TTL-level compatibility. Use Value: Doubles bus bandwidth without changing PCB layout - leverages identical 48-pin SSOP footprint and same control logic, while cutting propagation delay by >50% versus LS technology. |
| Modular I/O Carrier Board | Test Equipment Data Acquisition Interface |
|
Use Scenario: A field-replaceable I/O carrier board that routes sensor data between analog front-end modules and a central FPGA controller over a shared 16-bit parallel bus. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE controls per 8-bit segment, allowing selective isolation of failed modules while maintaining communication on others. Use Value: Supports fault-tolerant operation: individual module isolation via OEAB/OEBA gating prevents fault propagation, and dual-enable storage retains last valid state during diagnostics. |
Use Scenario: High-channel-count automated test equipment (ATE) where multiple DUT interfaces share a common 16-bit data acquisition bus routed through a central controller. IC Role / Device Role / Timing Role: Bus transceiver enabling time-multiplexed data capture from up to four DUTs via sequential OE activation, minimizing bus contention and skew. Use Value: Eliminates need for multiplexer ICs or FPGA-based bus arbitration logic - built-in 3-state control and sub-10 ns timing allow deterministic, jitter-free sampling across channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT162245DLR | 16-bit non-inverting transceiver with single-direction control (DIR) and single OE; no dual-OE storage mode. | Lacks bidirectional storage capability; requires external logic to emulate OEBA/OEAB dual-enable behavior. | Select when direction is fixed per transaction and simpler control logic is preferred over bus retention. |
| 74ACT16543DLR | 16-bit latch/transceiver with separate latch-enable (LE) and output-enable (OE); includes internal D-latch functionality. | Provides registered data capture but adds setup/hold timing constraints and increases propagation delay (tPD = 12 ns min). | Select when synchronous sampling or metastability mitigation is required, accepting added complexity and latency. |
Compared with SN74ACT162245DLR and 74ACT16543DLR, the 74ACT16623DLR uniquely supports true bidirectional bus storage without external latches or additional control signals - a key advantage in hot-swap, modular, and fault-isolation architectures where bus state retention is mandatory.
Availability
74ACT16623DLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus extensions, modular I/O carrier boards, and test equipment data acquisition interfaces requiring stable component supply across extended product lifecycles.
Supply support for 74ACT16623DLR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT16623DLR belongs to TI's Widebus™ family of high-speed bus interface devices, designed specifically for noise-immune, high-density PCB implementations in industrial control and instrumentation systems.
FAQ
What is the operating temperature range for the 74ACT16623DLR?
The 74ACT16623DLR is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per TI's SCAS152A datasheet and applies specifically to the DL-package variant. The 74ACT16623DLR does not support extended military temperature ranges - those are reserved for the 54ACT16623 variant in WD ceramic packaging.
Does the 74ACT16623DLR support true bidirectional bus storage without external components?
Yes - the 74ACT16623DLR supports native bus storage when both OEAB and OEBA inputs are asserted low. In this mode, each output reinforces its corresponding input, holding the last valid logic state on both A and B buses without clocks, latches, or external feedback. This behavior is explicitly documented in the FUNCTION TABLE and logic diagram of the 74ACT16623DLR datasheet.
What package type and pin count does the 74ACT16623DLR use?
The 74ACT16623DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.025-inch (0.635 mm) center-to-center pin spacing and a 300-mil body width. Its pinout is fully defined in the "TOP VIEW" diagram of the SCAS152A datasheet, including four VCC and eight GND pins distributed for noise reduction - a layout feature unique to the DL package variant of the 74ACT16623DLR.
Can the 74ACT16623DLR interface directly with 74LS-series logic?
Yes - the 74ACT16623DLR features TTL-voltage-compatible inputs (VIL ≤ 0.8 V, VVIH ≥ 2 V), allowing direct connection to 74LS, 74ALS, and other bipolar TTL families without level-shifting circuitry. Its output drive (±24 mA) also meets or exceeds LS fanout requirements, making the 74ACT16623DLR a seamless upgrade path in legacy systems.
What is the maximum guaranteed output current for the 74ACT16623DLR?
The 74ACT16623DLR guarantees ±24 mA output current per pin under recommended operating conditions (VCC = 4.5 V, TA = 25°C), as specified in the "recommended operating conditions" table of the SCAS152A datasheet. This drive strength supports driving 50-pF loads with controlled edge rates and ensures robust noise margins in electrically noisy industrial environments.
74ACT16623DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74ACT16623DLR FAQ
1.How can I place an order for 74ACT16623DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16623DLR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74ACT16623DLR reliable?
The price and inventory of 74ACT16623DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16623DLR is usually 5 days.
3.What payment methods are accepted for 74ACT16623DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16623DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16623DLR?
74ACT16623DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16623DLR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74ACT16623DLR?
For technical support, including 74ACT16623DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16623DLR requirements.
6.How does Aetrix verify that 74ACT16623DLR is sourced from the original manufacturer or authorized distributors?
All 74ACT16623DLR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74ACT16623DLR meets industry standards.
7.What is the process for return or replacement of 74ACT16623DLR?
All 74ACT16623DLR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16623DLR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74ACT16623DLR part is unused and in its original packaging.
Return procedure for 74ACT16623DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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