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Texas Instruments SN74ABTH16245DLG4
- Part No.:
- SN74ABTH16245DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABTH16245DLG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
SN74ABTH16245DLG4 from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for synchronous two-way data bus communication between A and B buses. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C ambient, delivers ±32-mA high-drive outputs, and features integrated bus-hold circuitry eliminating external pull resistors - used in industrial backplane interfaces and legacy parallel bus systems.
For engineers reviewing the SN74ABTH16245DLG4 datasheet, SN74ABTH16245DLG4 pinout, SN74ABTH16245DLG4 application, or SN74ABTH16245DLG4 equivalent, key selection considerations include its 48-pin SSOP (DL) package, dual 8-bit directional control (DIR), output-enable (OE) isolation timing, and high-noise-immunity EPIC-IIB BiCMOS process.
Technical Context
The SN74ABTH16245DLG4 implements a flow-through pin architecture with distributed VCC/GND pairs to minimize switching noise. Its dual-section design allows independent 8-bit A↔B or B↔A data routing per DIR input logic level, while OE enables full 16-bit 3-state isolation.
Bus-hold circuitry actively maintains valid logic levels on floating data inputs without external components. The device enters high-impedance state during power-up/down when VCC is below 2.1 V, and supports TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5-V TTL and mixed-voltage backplane systems. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications. |
| Output Drive | –32 mA IOH, +64 mA IOL - drives heavy capacitive loads and long traces without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 3.4 ns (typ) - supports high-speed parallel bus operation up to ~100 MHz system clock domains. |
| Bus-Hold Current | ±100 µA at VI = 0.8 V / 2.0 V - eliminates need for 4.7-kΩ pull-up/down resistors on unused data lines. |
| Power-Up State | High-impedance when VCC < 2.1 V - prevents bus contention during power sequencing. |
| Input Clamp Current | –18 mA - protects against transient overvoltage events on control/data pins. |
Pinout & Package
SN74ABTH16245DLG4 uses a 48-pin Plastic Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.1 mm body, 0.5-mm pitch, 1.2-mm max height, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Selects data flow direction per 8-bit section: DIR = L → B-to-A; DIR = H → A-to-B. |
| 1OE, 2OE | Output Enable Input | Active-low enable: OE = L activates outputs; OE = H forces all outputs to high-impedance state. |
| 1A1–1A8, 2A1–2A8 | Port A Data Inputs/Outputs | First and second 8-bit bidirectional data terminals connected to local bus side (e.g., microcontroller interface). |
| 1B1–1B8, 2B1–2B8 | Port B Data Inputs/Outputs | First and second 8-bit bidirectional data terminals connected to remote bus side (e.g., peripheral or memory bus). |
| VCC (Pins 7, 18, 29, 40) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity across wide bus. |
| GND (Pins 4, 11, 22, 33, 44) | Ground Reference | Five GND pins provide low-inductance return paths and enhance signal integrity for high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Reduces dynamic power dissipation vs. standard bipolar TTL while retaining drive strength and noise margin. |
| Flow-Through Pinout | Minimizes PCB trace crossovers and layer count in dense backplane routing layouts. |
| Bus-Hold Circuitry | Eliminates 16 external pull resistors - reduces BOM cost, board area, and assembly complexity. |
| Distributed Power/Ground | Four VCC and five GND pins suppress ground bounce (VOLP < 1 V) and improve EMI performance. |
| Power-Up/Down High-Z | Prevents bus contention during supply ramping - critical for hot-swap and multi-rail power sequencing. |
Applications
| Industrial Backplane Interface | Legacy Parallel Peripheral Bridge |
|---|---|
Use Scenario: Interfacing an FPGA-based controller to a multi-slot VMEbus or STD bus chassis with 16-bit data paths. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing synchronous A/B bus handshaking with DIR/OE-controlled timing windows. Use Value: Enables clean signal integrity across 150-mm backplane traces using high-drive outputs and distributed grounding. | Use Scenario: Connecting a modern ARM-based host to legacy ISA or PC/104 peripherals requiring 16-bit parallel I/O expansion. IC Role / Device Role / Timing Role: Isolating and buffering host-side address/data/control signals while supporting bidirectional data transfer under software-directed DIR control. Use Value: Eliminates need for discrete pull resistors and simplifies timing-critical OE assertion relative to CPU strobes. |
| Embedded Memory Expansion | Test Equipment Bus Arbitration |
Use Scenario: Expanding external SRAM or Flash memory width in a DSP-based motor control module with tight thermal constraints. IC Role / Device Role / Timing Role: Transferring 16-bit memory words between processor data bus and external memory array with precise OE-gated access windows. Use Value: Delivers 64-mA sink current to drive memory address latches and meets tPZH/tPHZ < 6.3 ns for sub-25-ns memory cycles. | Use Scenario: Enabling shared resource arbitration among multiple DUT interfaces in automated test equipment (ATE) mainframes. IC Role / Device Role / Timing Role: Providing isolated, direction-controllable data path between master controller and slave instrument modules via common backplane. Use Value: High-impedance isolation during bus turnaround prevents signal contention; bus-hold maintains stable idle states during arbitration gaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16245DGGR | Same function, TSSOP-48 (DGG) package; 8.6 mm × 3.9 mm footprint vs. DL's 12.6 mm × 6.1 mm. | Preferred where board space is constrained and reflow soldering is used; slightly higher θJA (89°C/W vs. 94°C/W). | Select for compact layouts and automated assembly; verify thermal derating in sealed enclosures. |
| SN74LVC16245ADGGR | 3.3-V only (1.65–3.6 V), lower drive (±24 mA), no bus-hold; CMOS process, not BiCMOS. | Suitable for 3.3-V-only systems; requires external pull resistors; incompatible with 5-V bus domains. | Choose only for new 3.3-V designs; not a drop-in replacement for SN74ABTH16245DLG4 in mixed-voltage or legacy 5-V environments. |
Compared with SN74ABT16245DGGR and SN74LVC16245ADGGR, the SN74ABTH16245DLG4 uniquely combines 5-V tolerance, integrated bus-hold, high-current drive, and SSOP packaging optimized for through-hole prototyping and industrial repairability - making it the preferred choice for maintaining legacy 5-V parallel infrastructure.
Availability
SN74ABTH16245DLG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy peripheral bridges, and embedded memory expansion requiring stable component supply across extended product lifecycles.
Supply support for SN74ABTH16245DLG4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74ABTH16245DLG4 belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for robust 5-V parallel bus communication in noise-sensitive industrial and instrumentation systems.
FAQ
What is the maximum operating temperature range for SN74ABTH16245DLG4?
The SN74ABTH16245DLG4 is characterized for operation from –40°C to +85°C. This industrial temperature range ensures reliable performance in factory automation controllers, test equipment, and outdoor embedded systems where ambient conditions exceed commercial limits. The device does not support the extended military range (–55°C to +125°C) specified for the SN54ABTH16245 variant.
Does SN74ABTH16245DLG4 require external pull-up or pull-down resistors on data lines?
No, SN74ABTH16245DLG4 includes active bus-hold circuitry on all A and B port inputs, providing ±100 µA holding current to maintain valid logic levels on floating or unused pins. This eliminates the need for external 4.7-kΩ pull resistors, reducing BOM count and PCB area - a confirmed feature documented in the SCBS662I datasheet Section 1.
What package type is used by SN74ABTH16245DLG4?
SN74ABTH16245DLG4 uses the SSOP (Shrink Small-Outline Package) with designation DL - a 48-pin, 0.5-mm pitch, 12.6 mm × 6.1 mm body size, JEDEC MO-153 compliant package. It is distinct from the TSSOP (DGG) and TVSOP (DGV) variants and is supplied in tube packaging (25 units per tube).
How does the direction-control logic work on SN74ABTH16245DLG4?
SN74ABTH16245DLG4 has two independent DIR inputs (1DIR and 2DIR) controlling separate 8-bit sections. When DIR = LOW, data flows from B-port to A-port; when DIR = HIGH, data flows from A-port to B-port. This per-section control enables flexible partitioning - e.g., using one section for address and another for data - without requiring external logic.
Can SN74ABTH16245DLG4 be used in 3.3-V systems?
No, SN74ABTH16245DLG4 is specified only for 4.5 V to 5.5 V supply operation and is not guaranteed to function correctly at 3.3 V. Its input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive characteristics are optimized for 5-V TTL compatibility. For 3.3-V systems, TI recommends SN74LVC16245A or similar LVC-family devices.
SN74ABTH16245DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ABTH16245DLG4 FAQ
1.How can I place an order for SN74ABTH16245DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH16245DLG4 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 SN74ABTH16245DLG4 reliable?
The price and inventory of SN74ABTH16245DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16245DLG4 is usually 5 days.
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Once your SN74ABTH16245DLG4 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 SN74ABTH16245DLG4?
For technical support, including SN74ABTH16245DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16245DLG4 requirements.
6.How does Aetrix verify that SN74ABTH16245DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16245DLG4 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 SN74ABTH16245DLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABTH16245DLG4?
All SN74ABTH16245DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16245DLG4, 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 SN74ABTH16245DLG4 part is unused and in its original packaging.
Return procedure for SN74ABTH16245DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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