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Texas Instruments 74ACT16864DL
- Part No.:
- 74ACT16864DL
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
74ACT16864DL.pdf
- Description:
- BUS TRANSCEIVER
- Quantity:
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Inventory:210
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Product details
Overview
74ACT16864DL from Texas Instruments is an 18-bit inverting transceiver IC designed for asynchronous bidirectional data bus communication between A and B buses. It operates over −40°C to 85°C, supports 5-V supply, delivers ±24 mA output drive, features flow-through pin architecture, and enables dual 9-bit or single 18-bit operation in high-density PCB layouts.
For engineers reviewing the 74ACT16864DL datasheet, 74ACT16864DL pinout, 74ACT16864DL application, or 74ACT16864DL equivalent, key selection criteria include TTL-compatible inputs, 3-state bus-driving capability, low-noise distributed VCC/GND pinning, and shrink small-outline (DL) package compatibility with 56-pin footprint constraints.
Technical Context
The 74ACT16864DL implements two independent 9-bit transceiver sections, each controlled by dedicated OEAB/OEBA inputs to select direction (A→B or B→A) or isolate buses. Its EPIC™ 1-µm CMOS process ensures latch-up immunity up to 500 mA at 125°C.
It uses a flow-through architecture with interleaved A/B I/O pins and distributed power/ground pins to minimize simultaneous switching noise. Input transition rates are specified up to 10 ns/V, and outputs meet ACT-family AC/DC specifications including VOH ≥ 3.94 V (VCC = 4.5 V, IOH = −24 mA) and VOL ≤ 0.44 V (VCC = 5.5 V, IOL = 24 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems without level-shifting. |
| Operating Temperature | −40°C to +85°C - suitable for commercial and industrial ambient environments. |
| Output Drive | ±24 mA - sufficient to directly drive terminated bus lines without external buffers. |
| Propagation Delay | 1.6 ns (tPLH, min) to 11.3 ns (tPHL, max) - supports high-speed asynchronous bus handshaking. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - interfaces directly with legacy 74LS/TTL logic. |
| Power Dissipation | 1.4 W (max at TA = 55°C, DL package) - requires thermal consideration in dense layouts. |
| IOZ Leakage | ±5 µA (max, VCC = 5.5 V) - ensures reliable high-impedance state during bus isolation. |
Pinout & Package
74ACT16864DL is housed in a 56-pin shrink small-outline (DL) package with 25-mil center-to-center pin spacing and flow-through I/O arrangement optimized for PCB trace routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 1OEBA, 2OEAB, 2OEBA | Output Enable Controls | Active-low enables for each 9-bit section; determines direction (A↔B) or high-Z isolation per section. |
| 1A1–1A9, 2A1–2A9 | Port A Inputs/Outputs | First and second 9-bit bus-side I/Os; inverted transceivers with 3-state capability. |
| 1B1–1B9, 2B1–2B9 | Port B Inputs/Outputs | Complementary 9-bit bus-side I/Os; data flows bidirectionally under OE control. |
| VCC (Pins 7, 22, 35, 46) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve signal integrity. |
| GND (Pins 4, 11, 14, 15, 25, 32, 43, 49) | Ground Reference | Eight GND pins provide low-inductance return paths and stabilize high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting Transceiver Logic | Ensures signal polarity consistency across bus domains while supporting standard handshake protocols. |
| Flow-Through Pin Architecture | Enables straight-line PCB trace routing between A and B ports, reducing crosstalk and layout complexity. |
| Distributed VCC/GND Pins | Minimizes ground bounce and supply rail collapse during high-frequency bus toggling. |
| EPIC™ 1-µm CMOS Process | Delivers 500-mA latch-up immunity at 125°C, enhancing reliability in noisy or thermally stressed environments. |
| TTL-Compatible Inputs | Eliminates need for external level shifters when interfacing with legacy 74LS or microcontroller GPIOs. |
Applications
| Backplane Data Routing | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Bidirectional data transfer between CPU module and peripheral slots in modular rack-mounted systems. IC Role / Device Role / Timing Role: 18-bit inverting transceiver managing isolated address/data bus segments with direction control via programmable OE signals. Use Value: Flow-through pinout simplifies backplane connector mapping; ±24 mA drive sustains signal integrity across 15-cm routed traces. |
Use Scenario: Extending local I/O capacity between main controller and remote terminal units in factory automation cabinets. IC Role / Device Role / Timing Role: Dual 9-bit transceiver enabling synchronous status reporting and command distribution across isolated bus domains. Use Value: TTL-compatible inputs interface directly with legacy PLC output cards; distributed GND pins suppress noise in EMI-prone cabinet environments. |
| Test Equipment Bus Interface | Legacy System Bus Bridge |
|
Use Scenario: Interfacing FPGA-based pattern generators with DUTs using standardized 18-bit parallel test buses. IC Role / Device Role / Timing Role: High-speed bidirectional buffer isolating tester logic from DUT power domains while preserving timing margins. Use Value: 1.6 ns minimum tPLH supports >100 MHz toggle rates; 3-state outputs prevent bus contention during test mode transitions. |
Use Scenario: Connecting modern microcontroller subsystems to legacy ISA or VMEbus peripherals requiring 18-bit data path translation. IC Role / Device Role / Timing Role: Inverting transceiver providing voltage-level and timing-domain bridging between dissimilar bus generations. Use Value: −40°C to +85°C rating ensures operation across aging chassis thermal profiles; 56-pin DL package fits space-constrained adapter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 18-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT16864DL | Same part number prefix; TI's current active designation replaces obsolete 74ACT16864DL in new designs. | No functional or pinout change; identical electrical specs and DL package. | Select SN74ACT16864DL for new designs requiring long-term availability and TI's latest quality assurance. |
| 74LVT16864DGG | 3.3-V LVT family; lower VCC (2.7–3.6 V), higher speed (tPD ≈ 3.2 ns typ), but not TTL-input compatible. | Requires level-shifting for 5-V systems; suited for mixed-voltage backplanes with 3.3-V controllers. | Choose only if migrating to 3.3-V infrastructure; incompatible with direct 5-V TTL input sourcing. |
Compared with 74ACT16864DL, SN74ACT16864DL offers identical functionality with updated manufacturing controls, while 74LVT16864DGG trades TTL compatibility for higher speed and lower voltage-requiring redesign of supply and interface circuitry.
Availability
74ACT16864DL is available at Aetrix Electronics and suitable for backplane data routing, industrial PLC I/O expansion, and test equipment bus interface requiring stable component supply across extended production lifecycles.
Supply support for 74ACT16864DL 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 innovation in high-reliability interface ICs.
The 74ACT16864DL belongs to TI's Widebus™ family of high-speed transceivers, engineered for noise-immune, high-density bus interfacing in industrial, telecom, and test equipment applications.
FAQ
What is the operating temperature range for the 74ACT16864DL?
The 74ACT16864DL is characterized for operation from −40°C to +85°C. This commercial/industrial temperature range ensures reliable performance in enclosed control cabinets, test benches, and non-aerospace embedded systems where ambient conditions remain within these limits. The 74ACT16864DL does not support extended military-range operation - that specification applies only to the 54ACT16864 variant.
Does the 74ACT16864DL support true bidirectional data flow on the same pins?
Yes, the 74ACT16864DL supports true bidirectional data flow per 9-bit section using separate OEAB and OEBA inputs. When OEAB is low and OEBA is high, data transfers from Port A to Port B; when OEBA is low and OEAB is high, data flows from Port B to Port A. Both OEs high places both ports in high-impedance isolation - a feature confirmed in the device's FUNCTION TABLE and logic diagram.
Is the 74ACT16864DL pin-compatible with other Widebus™ transceivers like the 74ACT16245?
No, the 74ACT16864DL is not pin-compatible with the 74ACT16245. The 74ACT16864DL uses a 56-pin DL package with distributed VCC/GND and flow-through A/B pin mapping, whereas the 74ACT16245 is a 48-pin device with different pin assignments, control signal placement, and non-inverting logic. Direct substitution would require PCB redesign.
What is the maximum output current the 74ACT16864DL can safely sink or source per pin?
The 74ACT16864DL is rated for ±24 mA DC output current per pin under recommended operating conditions (VCC = 4.5 V to 5.5 V). Absolute maximum ratings allow ±50 mA short-duration pulses, but sustained operation above ±24 mA risks exceeding thermal limits or violating VOL/VOH specs - verified in the Electrical Characteristics table on page 4 of SCAS244A.
Can unused control inputs on the 74ACT16864DL be left floating?
No, unused control inputs (including OEAB and OEBA) must not be left floating. Per Note 3 in the Recommended Operating Conditions table, all unused inputs must be held high or low using pull-up or pull-down resistors. Floating OE inputs risk indeterminate transceiver states, bus contention, or excessive ICC due to internal input stage instability - a requirement explicitly stated in the datasheet.
74ACT16864DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74ACT16864DL FAQ
1.How can I place an order for 74ACT16864DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16864DL 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 74ACT16864DL reliable?
The price and inventory of 74ACT16864DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16864DL is usually 5 days.
3.What payment methods are accepted for 74ACT16864DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16864DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16864DL?
74ACT16864DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16864DL 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 74ACT16864DL?
For technical support, including 74ACT16864DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16864DL requirements.
6.How does Aetrix verify that 74ACT16864DL is sourced from the original manufacturer or authorized distributors?
All 74ACT16864DL 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 74ACT16864DL meets industry standards.
7.What is the process for return or replacement of 74ACT16864DL?
All 74ACT16864DL units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16864DL, 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 74ACT16864DL part is unused and in its original packaging.
Return procedure for 74ACT16864DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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