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Texas Instruments 74ACT16245DL
- Part No.:
- 74ACT16245DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16245DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,070
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Product details
Overview
74ACT16245DL from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses in industrial and embedded systems. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C temperature range, delivers ±24 mA output drive, and features flow-through pinout for optimized PCB layout.
For engineers reviewing the 74ACT16245DL datasheet, 74ACT16245DL pinout, 74ACT16245DL application, or 74ACT16245DL equivalent, key selection criteria include bidirectional data routing control via DIR/G inputs, TTL-compatible inputs, distributed VCC/GND for noise suppression, and SSOP-48 packaging for high-density board designs.
Technical Context
The 74ACT16245DL implements dual-octal transceiver architecture with independent direction (DIR) and output-enable (G) controls per 8-bit port pair. Its EPIC™ 1-μm CMOS process enables 500-mA latch-up immunity at 125°C and supports 3.2 ns minimum propagation delay (tPLH/tPHL) under 5-V operation.
It uses distributed power/ground pins (multiple VCC and GND terminals across the 48-pin SSOP package) to minimize simultaneous switching noise, and its flow-through pinout places A-side inputs and B-side outputs on opposite sides of the package to simplify trace routing without layer jumps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and CMOS logic rails |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Output Drive | ±24 mA - sufficient to directly drive standard 50-Ω transmission lines or multiple TTL loads |
| Propagation Delay | 2.6 ns (min) to 11.5 ns (max) - enables reliable operation up to ~50 MHz bus frequencies |
| Input Compatibility | TTL-voltage compatible - accepts 0.8 V / 2.0 V VIH/VIL thresholds without level-shifting |
| Power Dissipation | 1.2 W (max at TA = 55°C) - defines thermal derating requirements for dense PCB layouts |
| 3-State Leakage | ±10 μA (max IOZ) - ensures minimal bus contention during isolation mode |
Pinout & Package
74ACT16245DL is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.5-mm pin pitch, 1.2-mm max height, with gull-wing leads and pin 1 identifier in quadrant Q1 per tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per octal section: L = B→A, H = A→B |
| 1G, 2G | Output enable input | Active-low; H disables both A and B ports into high-impedance state |
| 1A1–1A8, 2A1–2A8 | Port A data inputs/outputs | First and second octal A-side I/O terminals; bidirectional when enabled |
| 1B1–1B8, 2B1–2B8 | Port B data inputs/outputs | First and second octal B-side I/O terminals; bidirectional when enabled |
| VCC (pins 7, 18, 29, 40) | Power supply | Four distributed VCC pins reduce IR drop and high-frequency supply impedance |
| GND (pins 4, 11, 15, 22, 26, 33, 37, 44) | Ground reference | Eight distributed GND pins provide low-inductance return paths for switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Places A-side signals on left and B-side signals on right side of package to eliminate layer crossovers and reduce trace length |
| Distributed VCC/GND | Four VCC and eight GND pins minimize simultaneous switching noise and improve signal integrity in high-speed buses |
| TTL-compatible inputs | Accepts standard TTL logic thresholds (VIH = 2.0 V, VIL = 0.8 V) without external biasing or level translation |
| EPIC™ process technology | 1-μm CMOS fabrication delivers 500-mA latch-up immunity at 125°C for robust operation in noisy environments |
| 3-state output isolation | High-impedance state (IOZ ≤ ±10 μA) prevents bus contention when devices are disabled |
Applications
| Industrial Backplane Interfacing | Legacy System Bus Extension |
|---|---|
Use Scenario: Connecting microcontroller local bus to extended ISA or VME-style backplane with multiple slot peripherals. IC Role / Device Role / Timing Role: Bidirectional bus buffer isolating CPU address/data lines from long, unterminated backplane traces. Use Value: Flow-through pinout simplifies routing across 2-layer backplanes; ±24 mA drive sustains signal integrity over 15 cm traces at 20 MHz. | Use Scenario: Upgrading aging 80C188-based control system with modern FPGA co-processor while retaining legacy memory-mapped I/O. IC Role / Device Role / Timing Role: Level-translating and isolating 5-V CPU bus from FPGA I/O bank operating at same voltage but requiring clean enable timing. Use Value: Independent DIR/G controls allow synchronous handshaking; TTL-compatible inputs eliminate need for external pull-ups on control lines. |
| Automated Test Equipment (ATE) Fixture | Programmable Logic Interface |
Use Scenario: Signal conditioning and isolation between PXI controller and DUT interface board with mixed-voltage test points. IC Role / Device Role / Timing Role: Direction-controlled data path enabling stimulus/response sequencing without bus turnaround delays. Use Value: 2.6 ns min tPHL allows sub-10 ns control-to-data latency; distributed GND pins suppress crosstalk between analog and digital sections. | Use Scenario: Glue logic between CPLD configuration bus and external SRAM used for lookup table storage. IC Role / Device Role / Timing Role: Bidirectional data shuttle synchronized to CPLD clock domain while maintaining isolation during reconfiguration. Use Value: 1.2 W thermal rating permits placement near FPGA heat sources; SSOP-48 footprint fits within tight 10 mm × 10 mm routing zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT16245DGGR | TSSOP-48 package (DGG); thinner profile (1.2 mm vs. DL's 2.0 mm), finer pitch (0.5 mm), higher MSL rating (Level-1) | Better suited for automated SMT assembly with fine-pitch reflow profiles; lower thermal mass eases solder joint reliability | Select when board space is constrained and assembly line supports TSSOP handling. |
| SN74LVC16245ADGGR | 3.3-V only operation (1.65–3.6 V); lower drive (±24 mA @ 3.3 V); LVTTL-compatible inputs; smaller die size | Designed for mixed-voltage 3.3-V systems; not interoperable with 5-V buses without level shifters | Select only for new 3.3-V designs; not a drop-in replacement for 5-V 74ACT16245DL. |
Compared with 74ACT16245DGGR, the 74ACT16245DL offers greater mechanical robustness and thermal margin in legacy 5-V industrial boards, while SN74LVC16245ADGGR provides voltage scalability at the cost of 5-V compatibility and reduced noise immunity.
Availability
74ACT16245DL is available at Aetrix Electronics and suitable for industrial backplane interfacing, legacy system bus extension, automated test equipment fixture design, and programmable logic interface applications requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT16245DL 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.
The 74ACT16245DL belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, high-density data routing in mission-critical industrial control and instrumentation systems.
FAQ
What is the maximum operating temperature range for the 74ACT16245DL?
The 74ACT16245DL is characterized for operation from –40°C to +85°C. This commercial/industrial temperature grade is confirmed in the recommended operating conditions table of the official SCAS097B datasheet. The device uses EPIC™ CMOS process technology to maintain parameter stability across this full range, including guaranteed ±24 mA output drive and sub-12 ns propagation delay at the upper limit.
Does the 74ACT16245DL support true bidirectional data flow without external logic?
Yes, the 74ACT16245DL supports true bidirectional data flow using its dedicated DIR (direction) and G (enable) inputs. When G is low, data flows from A to B if DIR is high, or from B to A if DIR is low - all without external gates or timing constraints. This dual-control scheme is explicitly defined in the FUNCTION TABLE of the SCAS097B datasheet and eliminates the need for additional control logic in bus arbitration circuits.
Can the 74ACT16245DL be used in a 3.3-V system?
No, the 74ACT16245DL is specified only for 4.5 V to 5.5 V supply operation. Its absolute maximum ratings, recommended operating conditions, and electrical characteristics (e.g., VOH ≥ 3.94 V at 4.5 V) are all defined for 5-V systems. Using it below 4.5 V risks undefined logic states, increased propagation delay, and potential failure to meet TTL input thresholds - as confirmed by TI's SCAS097B datasheet Section "Recommended Operating Conditions".
How many ground pins does the 74ACT16245DL package have, and why are they distributed?
The 74ACT16245DL in SSOP-DL package has eight GND pins (pins 4, 11, 15, 22, 26, 33, 37, 44), distributed across the perimeter. This layout minimizes ground loop inductance and reduces simultaneous switching noise - a key design feature highlighted in the datasheet's "Distributed VCC and GND Configuration to Minimize High-Speed Switching Noise" bullet. Each GND pin services adjacent I/O banks, ensuring low-impedance return paths for fast edge rates.
Is the 74ACT16245DL pin-compatible with other members of the 74ACT16245 family?
Yes, the 74ACT16245DL shares identical pinout and functionality with other 48-pin variants including 74ACT16245DGGR (TSSOP) and SN54ACT16245WD (ceramic flatpack), as confirmed by the shared logic diagram, terminal assignment table, and function table in SCAS097B. All variants use the same 48-pin dual-octal transceiver topology with matching DIR/G control, A/B port mapping, and distributed power/ground pin locations.
74ACT16245DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
74ACT16245DL FAQ
1.How can I place an order for 74ACT16245DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16245DL 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 74ACT16245DL reliable?
The price and inventory of 74ACT16245DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16245DL is usually 5 days.
3.What payment methods are accepted for 74ACT16245DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16245DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16245DL?
74ACT16245DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16245DL 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 74ACT16245DL?
For technical support, including 74ACT16245DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16245DL requirements.
6.How does Aetrix verify that 74ACT16245DL is sourced from the original manufacturer or authorized distributors?
All 74ACT16245DL 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 74ACT16245DL meets industry standards.
7.What is the process for return or replacement of 74ACT16245DL?
All 74ACT16245DL units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16245DL, 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 74ACT16245DL part is unused and in its original packaging.
Return procedure for 74ACT16245DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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