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Texas Instruments 74AC16245DL
- Part No.:
- 74AC16245DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74AC16245DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
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Product details
Overview
74AC16245DL from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between parallel buses. It operates from 3 V to 5.5 V, supports –40°C to 85°C industrial temperature range, delivers ±24 mA output drive at 5 V, and features flow-through pinout architecture for optimized PCB layout in memory address buffering and bus isolation applications.
For engineers reviewing the 74AC16245DL datasheet, 74AC16245DL pinout, 74AC16245DL application, or 74AC16245DL equivalent, key selection criteria include its 48-pin SSOP (DL) package, dual-direction control via DIR/OE inputs, 3-state output isolation timing (tPZH = 2.3 ns min at 5 V), and compatibility with Widebus™-optimized high-speed digital systems requiring low-noise distributed VCC/GND routing.
Technical Context
The 74AC16245DL implements two independent 8-bit transceiver sections (A↔B), each controlled by dedicated DIR (direction) and OE (output enable) inputs. Its EPIC™ CMOS process enables rail-to-rail input thresholds (VIH = 3.15 V min at VCC = 4.5 V) and fast propagation delays (tPLH = 2.0 ns min at 5 V).
It uses distributed VCC and GND pins across the 48-pin DL package to suppress high-speed switching noise, and supports flow-through logic-where A-side inputs align physically with B-side outputs-to minimize trace crossovers and signal integrity degradation in dense bus architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3 V to 5.5 V - supports mixed-voltage system interfacing and legacy 5 V TTL-compatible operation |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and data acquisition environments |
| Output Drive | ±24 mA at VCC = 4.5 V - sufficient to drive 50-pF loads with <8.9 ns tPHL, enabling reliable 20+ MHz bus operation |
| Propagation Delay | 2.0 ns (min, tPLH at 5 V) - ensures tight timing margins in synchronous bus arbitration and memory-mapped I/O designs |
| Input Thresholds | VIH = 3.15 V, VIL = 1.35 V at VCC = 4.5 V - provides >1.3 V noise margin against ground bounce in noisy industrial PCBs |
| Power Dissipation | 1.2 W max (DL package at TA = 55°C) - requires no forced airflow in standard convection-cooled enclosures |
| 3-State Leakage | IOZ = ±5 µA max at VCC = 5.5 V - prevents unintended bus contention during power sequencing or hot-swap events |
Pinout & Package
74AC16245DL is housed in a 48-pin Shrink Small-Outline Package (SSOP), designated DL, with 0.025-inch (0.635 mm) center-to-center pin pitch and 380-mil body width. The package includes 10 dedicated VCC and 10 GND pins distributed across both sides to minimize simultaneous switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Active-High logic selects A→B (DIR = H) or B→A (DIR = L) data flow per 8-bit section |
| 1OE, 2OE | Output Enable Input | Active-Low logic disables all outputs to high-impedance state, isolating both buses simultaneously |
| 1A1–1A8, 2A1–2A8 | A-Side Data I/O | First and second octal group of bidirectional data terminals connected to local subsystem bus |
| 1B1–1B8, 2B1–2B8 | B-Side Data I/O | Corresponding octal group connected to remote or shared system bus; pin-aligned for flow-through routing |
| VCC (pins 7,14,21,28,35,42,4,11,18,25) | Power Supply | Distributed VCC pins reduce IR drop and supply impedance across high-frequency switching loads |
| GND (pins 3,10,17,24,31,38,45,6,13,20) | Ground Reference | 10 GND pins provide low-inductance return paths, critical for maintaining signal integrity at >10 MHz edge rates |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Physical A-input/B-output alignment minimizes PCB trace length and layer transitions, reducing skew and EMI in 16-bit parallel interfaces |
| Distributed VCC/GND | 10 power and 10 ground pins suppress simultaneous switching noise by lowering effective supply loop inductance below 1 nH |
| EPIC™ CMOS process | 1-µm fabrication delivers latch-up immunity ≥500 mA at 125°C, enabling robust operation in electrically harsh industrial environments |
| Widebus™ compatibility | Pinout and timing conform to TI's Widebus family standards, allowing drop-in replacement with other 16-bit transceivers in existing layouts |
| 3.3 V / 5 V interoperability | Guaranteed VIH/VIL thresholds support direct interfacing with both 3.3 V LVTTL and 5 V TTL logic families without level-shifting |
Applications
| Memory Address Buffering | Backplane Bus Isolation |
|---|---|
|
Use Scenario: Buffering CPU-generated address signals to multiple memory modules on a shared bus while preventing capacitive loading degradation. IC Role / Device Role / Timing Role: Bidirectional address transceiver that isolates CPU address lines from memory module input capacitance during inactive cycles. Use Value: Enables stable 16-bit address propagation at >15 MHz with <10.4 ns max tPHL (VCC = 3.3 V), eliminating address skew across 8+ memory devices. |
Use Scenario: Electrically isolating two 16-bit peripheral buses on an industrial backplane during hot-swap or fault conditions. IC Role / Device Role / Timing Role: 3-state bus transceiver used as a programmable bus barrier, controlled by FPGA-based system manager. Use Value: Achieves <1 µA high-Z leakage (IOZ) to prevent cross-talk between isolated segments, supporting fail-safe diagnostics and modular maintenance. |
| Microcontroller Expansion Interface | Dual-Processor Data Exchange |
|
Use Scenario: Extending GPIO count of an 8-bit microcontroller to drive external peripherals via a 16-bit parallel interface. IC Role / Device Role / Timing Role: Level-shifting and bus-driving transceiver translating MCU port signals to higher-drive external bus standards. Use Value: Delivers ±24 mA drive strength at 5 V to meet minimum current requirements of legacy LCD controllers and parallel ADCs without external buffers. |
Use Scenario: Enabling real-time data exchange between two independent processors sharing a common memory-mapped register space. IC Role / Device Role / Timing Role: Synchronized bidirectional data conduit where DIR controls master/slave direction and OE enables atomic read/write handshaking. Use Value: Supports sub-10 ns propagation delay symmetry (tPLH/tPHL ≤ 2.5 ns mismatch at 5 V), ensuring deterministic inter-processor handshake timing. |
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 |
|---|---|---|---|
| SN74LVC16245ADGGR | 3.3 V only (1.65–3.6 V), lower drive (±24 mA @ 3.3 V), smaller 48-pin TSSOP package | Targeted for low-power portable systems; lacks 5 V tolerance and industrial temp range | Select when operating exclusively at 3.3 V and board space is constrained; not suitable for 5 V legacy bus interfacing |
| 74ACT16245DLR | TTL-compatible inputs (VIH = 2 V min), identical 48-pin DL package and timing, same temp range | Designed for systems with mixed TTL/CMOS logic; higher ICC (80 µA max vs. 8 µA for AC) | Choose for guaranteed compatibility with 5 V TTL drivers; accept higher static power in always-on control-plane applications |
Compared with 74AC16245DL, SN74LVC16245ADGGR reduces voltage flexibility but saves board area, while 74ACT16245DLR trades lower quiescent current for guaranteed TTL input recognition-making it preferable in legacy controller interfaces where input threshold margin is critical.
Availability
74AC16245DL is available at Aetrix Electronics and suitable for industrial automation controllers, memory expansion modules, and backplane-based embedded systems requiring stable component supply across extended product lifecycles.
Supply support for 74AC16245DL 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 connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.
The 74AC16245DL belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-immune, high-density parallel data routing in industrial control, test equipment, and computing infrastructure.
FAQ
What is the maximum operating voltage for the 74AC16245DL?
The 74AC16245DL supports a supply voltage range of 3 V to 5.5 V, with absolute maximum rating of 7 V on VCC. Operation above 5.5 V violates recommended conditions and risks permanent damage. At 5.5 V, the device maintains full 3-state functionality and ±24 mA output drive capability, making it compatible with legacy 5 V systems while offering headroom for transient spikes.
Does the 74AC16245DL support 3.3 V logic levels?
Yes, the 74AC16245DL is fully specified down to 3 V supply and meets all AC/DC parameters at 3.3 V, including VIH = 2.1 V min and VOL = 0.44 V max at IOL = 24 mA. Its EPIC™ CMOS process ensures clean 3.3 V–5 V interoperability without external level shifters, enabling direct connection to modern microcontrollers and FPGAs.
How many power and ground pins does the 74AC16245DL have?
The 74AC16245DL has 10 VCC pins (pins 4, 7, 11, 14, 18, 21, 25, 28, 35, 42) and 10 GND pins (pins 3, 6, 10, 13, 17, 20, 24, 31, 38, 45), distributed symmetrically across both long edges of the 48-pin DL package. This configuration minimizes supply impedance and suppresses simultaneous switching noise in high-speed bus applications.
What is the function of the DIR and OE pins on the 74AC16245DL?
Each half of the 74AC16245DL (1DIR/1OE and 2DIR/2OE) independently controls data direction and output enable. DIR selects A→B (H) or B→A (L); OE (active-low) places all associated outputs in high-impedance state. When OE is high, outputs are disabled regardless of DIR state-enabling true bus isolation during reset or power-down sequences in the 74AC16245DL.
Is the 74AC16245DL pin-compatible with other Widebus™ transceivers?
Yes, the 74AC16245DL shares identical 48-pin DL package dimensions, pinout, and flow-through architecture with TI's Widebus™-compliant 16-bit transceivers including 74ACT16245DL and 74ABT16245DL. This allows direct PCB-level substitution where voltage and timing requirements align, without layout modification-confirmed by TI's official package drawing DL and Widebus™ design guidelines.
74AC16245DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- 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:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74AC16245DL FAQ
1.How can I place an order for 74AC16245DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC16245DL 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 74AC16245DL reliable?
The price and inventory of 74AC16245DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC16245DL is usually 5 days.
3.What payment methods are accepted for 74AC16245DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC16245DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC16245DL?
74AC16245DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC16245DL 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 74AC16245DL?
For technical support, including 74AC16245DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC16245DL requirements.
6.How does Aetrix verify that 74AC16245DL is sourced from the original manufacturer or authorized distributors?
All 74AC16245DL 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 74AC16245DL meets industry standards.
7.What is the process for return or replacement of 74AC16245DL?
All 74AC16245DL units undergo pre-shipment inspection (PSI). If there is an issue with 74AC16245DL, 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 74AC16245DL part is unused and in its original packaging.
Return procedure for 74AC16245DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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