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Texas Instruments 74ACT16623DL
- Part No.:
- 74ACT16623DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16623DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,201
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Product details
Overview
74ACT16623DL from Texas Instruments is a 16-bit dual 8-bit bus transceiver with 3-state outputs, TTL-voltage-compatible inputs, and flow-through pin architecture optimized for PCB layout. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C ambient temperature, delivers ±24 mA output drive, and features tPLH/tPHL propagation delays as low as 4.2 ns/3.1 ns at VCC = 5 V - used in high-speed backplane and motherboard data bus isolation.
For engineers reviewing the 74ACT16623DL datasheet, 74ACT16623DL pinout, 74ACT16623DL application, or 74ACT16623DL equivalent, key selection criteria include its dual 3-state enable control (OEBA/OEAB), distributed VCC/GND pin configuration for noise reduction, EPIC™ 1-µm CMOS process, and SSOP-48 (DL) package compatibility with space-constrained industrial control and telecom interface designs.
Technical Context
The 74ACT16623DL implements asynchronous bidirectional data transfer between two 16-bit buses using independent OEBA (B→A enable) and OEAB (A→B enable) controls. Its dual-enable mode allows simultaneous activation to latch bus states via feedback reinforcement - no external storage required.
It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) 1-µm process with distributed power/ground pins (12× VCC and 12× GND across 48-pin SSOP) to suppress high-speed switching noise. Input transition rate tolerance up to 10 ns/V ensures robust timing margin in mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of ±10% regulation variation. |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads at full speed without external buffers in dense bus topologies. |
| Propagation Delay | tPLH/tPHL = 4.2 ns / 3.1 ns (min, VCC = 5 V) - enables >100 MHz bus toggle rates in point-to-point configurations. |
| Input Compatibility | TTL-voltage-level inputs (VIH = 2 V, VIL = 0.8 V) - interoperable with legacy 74LS and microcontroller GPIOs without level shifters. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including programmable logic controllers and base station interfaces. |
| Power Dissipation | 1.2 W max (TA = 55°C, DL package) - supports continuous operation in convection-cooled enclosures without forced airflow. |
| 3-State Leakage | IOZ = ±5 µA (VCC = 5.5 V) - ensures minimal bus contention during high-impedance isolation in multi-drop architectures. |
Pinout & Package
74ACT16623DL is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 25-mil center-to-center pin pitch, RoHS-compliant NIPDAU finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB | B-bus to A-bus output enable (active-low) | Controls 3-state output drivers for B→A data path; low enables transmission, high isolates A bus. |
| 1OEBA, 2OEBA | A-bus to B-bus output enable (active-low) | Controls 3-state output drivers for A→B data path; low enables transmission, high isolates B bus. |
| 1A1–1A8, 2A1–2A8 | A-side bidirectional I/O ports | First and second 8-bit A-bus lanes; function as inputs when corresponding OEAB active, outputs when OEBA active. |
| 1B1–1B8, 2B1–2B8 | B-side bidirectional I/O ports | First and second 8-bit B-bus lanes; function as inputs when corresponding OEBA active, outputs when OEAB active. |
| VCC (Pins 7, 18, 29, 40) | Power supply | Distributed VCC pins minimize IR drop and ground bounce across high-frequency switching events. |
| GND (Pins 4, 10, 15, 21, 26, 32, 37, 43) | Ground reference | 12 total GND pins interleaved with VCC and I/O to reduce loop inductance and EMI in 16-bit parallel paths. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Input and output pins aligned on opposite sides (e.g., 1A1 ↔ 1B1) - eliminates layer jumps and reduces trace length by up to 40% in dense PCB layouts. |
| Dual independent 3-state control | Separate OEBA and OEAB inputs per 8-bit section - enables asymmetric bus directionality, partial isolation, and dynamic reconfiguration without system reset. |
| Bus hold capability via dual-enable mode | Simultaneous OEBA + OEAB low reinforces current bus state - maintains valid logic levels on both A and B buses when all other drivers are high-Z, eliminating need for external pull-ups. |
| EPIC™ 1-µm CMOS process | Combines TTL input thresholds with CMOS power efficiency - achieves 80 µA ICC (max) at standby while sustaining 24 mA drive strength. |
| Distributed power/ground network | 12 VCC and 12 GND pins evenly spaced across 48-pin footprint - reduces simultaneous switching noise (SSN) below 150 mVpp in 16-bit burst transfers. |
Applications
| Industrial Backplane Interface | Telecom Line Card Data Bus |
|---|---|
|
Use Scenario: Isolating CPU local bus from peripheral expansion slots in modular PLC chassis with hot-swap capability. IC Role / Device Role / Timing Role: Bidirectional 16-bit transceiver managing address/data multiplexing between processor and field I/O modules under software-controlled direction. Use Value: Dual OE control allows selective isolation of individual 8-bit segments during firmware updates, preventing bus contention during partial reconfiguration. |
Use Scenario: Interfacing FPGA-based packet processing engine to SERDES PHY chips on telecom line cards requiring signal integrity preservation. IC Role / Device Role / Timing Role: High-speed bus buffer providing clean 3-state isolation between clock-domain-crossing logic blocks operating at different voltage rails. Use Value: 4.2 ns tPLH delay and distributed VCC/GND ensure <100 ps skew across all 16 bits, meeting SONET OC-48 timing budgets. |
| Automotive Diagnostic Gateway | Test Equipment Data Acquisition Bus |
|
Use Scenario: Enabling bidirectional communication between microcontroller and CAN/LIN transceivers in vehicle diagnostic gateways with ESD-hardened I/O. IC Role / Device Role / Timing Role: Level-shifting and bus-isolation transceiver translating between 3.3-V MCU GPIO and 5-V legacy automotive bus peripherals. Use Value: TTL-compatible inputs accept 2-V VIH threshold from older 5-V transceivers, while 5-V tolerant outputs drive legacy CAN controller inputs directly. |
Use Scenario: Multiplexing multiple ADC/DAC channels onto shared high-speed parallel bus in automated test equipment (ATE) mainframes. IC Role / Device Role / Timing Role: Synchronized 16-bit data funnel enabling time-aligned sampling across 8-channel analog front-ends. Use Value: Flow-through pinout permits straight-layer routing with matched trace lengths, maintaining <5 ps inter-channel skew for 100-MSPS acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 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 bus hold mode. | Lacks simultaneous OEBA+OEAB latching behavior; requires external logic for bus state retention. | Preferred where unidirectional data flow dominates and board space favors simpler control logic. |
| 74LVC16245ADL,118 | 3.3-V only operation (1.65–3.6 V), lower drive (±24 mA @ 3.3 V), smaller 48-pin TSSOP package. | Not 5-V tolerant; incompatible with legacy 5-V bus systems unless level-shifted. | Select when migrating to low-voltage domains and interfacing exclusively with 3.3-V FPGAs or ASICs. |
Compared with SN74ACT162245DLR and 74LVC16245ADL,118, the 74ACT16623DL uniquely supports true bidirectional latching via dual OE control and maintains full 5-V system interoperability - critical for brownfield industrial upgrades and mixed-voltage backplanes.
Availability
74ACT16623DL is available at Aetrix Electronics and suitable for industrial backplane interfaces, telecom line card data buses, automotive diagnostic gateways, and test equipment data acquisition buses requiring stable component supply across extended product lifecycles.
Supply support for 74ACT16623DL 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, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The 74ACT16623DL belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for low-noise, high-density parallel data transfer in mission-critical industrial and telecom infrastructure.
FAQ
What is the maximum operating temperature range for the 74ACT16623DL?
The 74ACT16623DL is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade rating makes it suitable for deployment in programmable logic controllers, base station radios, and factory automation hardware where thermal cycling and extended uptime are required. The 74ACT16623DL maintains full electrical specifications across this entire range without derating.
Does the 74ACT16623DL support true bidirectional data flow without external direction control logic?
Yes - the 74ACT16623DL implements native bidirectional operation through independent OEAB (B→A enable) and OEBA (A→B enable) inputs. Unlike unidirectional transceivers requiring a separate DIR pin, the 74ACT16623DL allows A↔B data transfer, isolated bus segments, or simultaneous latching - all controlled solely by the two OE signals. This eliminates external logic gates in compact bus arbitration schemes.
Can the 74ACT16623DL be used to isolate two 5-V buses while maintaining signal integrity at 50 MHz?
Yes - the 74ACT16623DL delivers tPLH/tPHL propagation delays as low as 4.2 ns/3.1 ns at VCC = 5 V, supporting reliable 50-MHz bus toggling with margin. Its distributed VCC/GND pin structure and 16 pF Cio capacitance minimize crosstalk and ground bounce. When used with controlled-impedance 50-Ω traces and proper decoupling, the 74ACT16623DL sustains signal integrity across 16-bit parallel paths at this frequency.
What package type and lead finish does the 74ACT16623DL use?
The 74ACT16623DL is supplied in a 48-pin Shrink Small-Outline Package (SSOP-DL) with 300-mil body width and 25-mil pin pitch. It features a RoHS-compliant NIPDAU (nickel/palladium/gold) lead finish and meets JEDEC MSL Level-1 (unlimited floor life at ≤30°C/60% RH), enabling standard reflow assembly without baking.
How does the dual-enable mode of the 74ACT16623DL provide bus state retention?
When both OEBA and OEAB are driven low, the 74ACT16623DL enters dual-enable mode: each output actively drives its corresponding input, reinforcing the present logic state on both A and B buses. With all other drivers in high-impedance, this feedback loop holds bus values indefinitely - eliminating need for external pull-up/down resistors or latch ICs. This behavior is intrinsic to the 74ACT16623DL's internal architecture and requires no additional configuration.
74ACT16623DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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
74ACT16623DL FAQ
1.How can I place an order for 74ACT16623DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16623DL 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 74ACT16623DL reliable?
The price and inventory of 74ACT16623DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16623DL is usually 5 days.
3.What payment methods are accepted for 74ACT16623DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16623DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16623DL?
74ACT16623DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16623DL 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 74ACT16623DL?
For technical support, including 74ACT16623DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16623DL requirements.
6.How does Aetrix verify that 74ACT16623DL is sourced from the original manufacturer or authorized distributors?
All 74ACT16623DL 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 74ACT16623DL meets industry standards.
7.What is the process for return or replacement of 74ACT16623DL?
All 74ACT16623DL units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16623DL, 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 74ACT16623DL part is unused and in its original packaging.
Return procedure for 74ACT16623DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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