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Texas Instruments SN74ABTH16245DGGR
- Part No.:
- SN74ABTH16245DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ABTH16245DGGR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
SN74ABTH16245DGGR 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 features high-drive outputs (–32 mA IOH, 64 mA IOL), bus-hold circuitry on all data inputs, and operates over –40°C to 85°C at 4.5–5.5 V supply. Used in industrial backplane interfaces and memory expansion subsystems.
For engineers reviewing the SN74ABTH16245DGGR datasheet, SN74ABTH16245DGGR pinout, SN74ABTH16245DGGR application, or SN74ABTH16245DGGR equivalent, key selection considerations include bidirectional 3-state control timing, bus-hold functionality eliminating external resistors, thermal performance in TSSOP-48, and compatibility with 5-V TTL/CMOS logic systems.
Technical Context
The SN74ABTH16245DGGR implements dual 8-bit sections with independent DIR and OE controls, enabling flexible A↔B or B↔A data flow per section. Its EPIC-IIB BiCMOS process delivers low ground bounce (<1 V VOLP) and high-speed switching with tPLH/tPHL ≤ 3.9 ns (typ) at 5 V.
Power-up/down isolation is ensured by inherent high-impedance behavior below 2.1 V VCC, while distributed VCC/GND pins and flow-through pinout minimize simultaneous switching noise and optimize PCB routing density.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial 5-V rail tolerances without level-shifting. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial environments including factory automation and telecom infrastructure. |
| Output Drive | –32 mA IOH / 64 mA IOL - Supports heavy capacitive loads (e.g., >100 pF traces) and fan-out to multiple TTL inputs. |
| Propagation Delay | tPLH/tPHL ≤ 3.9 ns (typ) at CL = 50 pF - Enables reliable 100+ MHz bus operation in synchronous backplane designs. |
| Bus-Hold Current | ±100 µA at VI = 0.8 V / 2.0 V - Actively maintains valid logic levels on floating data lines, removing need for 10-kΩ pull-ups. |
| Thermal Resistance | θJA = 89°C/W (DGG package) - Allows sustained 32-mA drive without derating in standard 2-layer FR-4 layouts. |
| ESD Rating | Exceeds JESD 17 latch-up immunity (>500 mA) - Guarantees survivability during board handling and hot-plug events. |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.1 mm × 1.2 mm body, 0.5-mm pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Determines 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 transceiver; OE = H forces all outputs into high-impedance state. |
| 1A1–1A8, 2A1–2A8 | Port A Data Inputs/Outputs | First and second 8-bit bus interface ports on A side; support bidirectional flow when enabled. |
| 1B1–1B8, 2B1–2B8 | Port B Data Inputs/Outputs | First and second 8-bit bus interface ports on B side; electrically identical to A ports. |
| VCC (Pins 7, 18, 29, 40) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity across high-speed operation. |
| GND (Pins 4, 11, 22, 33, 44) | Ground Reference | Five GND pins provide low-inductance return paths, critical for maintaining signal integrity at >100 Mbps. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides of package to eliminate layer-crossing vias and reduce trace length by up to 40%. |
| High-impedance during power sequencing | Automatically enters Hi-Z when VCC < 2.1 V - prevents bus contention during hot-swap or brownout conditions. |
| Bus-hold circuitry | Eliminates external pull-up/pull-down resistors on all 32 data lines, reducing BOM count and PCB area by ≥16 passives. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power - achieves 3.9-ns propagation delay with ICC < 2 mA in standby. |
| Distributed VCC/GND | Four VCC and five GND pins placed strategically across package perimeter to suppress ground bounce (VOLP < 1 V). |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
Use Scenario: Isolating and translating data between CPU local bus and peripheral expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 16-bit bus transceiver synchronizing asynchronous modules with independent DIR/OE control per 8-bit lane. Use Value: Bus-hold eliminates floating-line faults during slot insertion/removal; 64-mA IOL drives long parallel traces with minimal skew. |
Use Scenario: Extending address/data bus width between microcontroller and external SRAM/Flash in embedded instrumentation. IC Role / Device Role / Timing Role: Noninverting 3-state buffer enabling time-multiplexed access to shared memory space without bus contention. Use Value: Flow-through pinout allows direct layer routing; 3.9-ns tPHL supports 100-MHz burst read/write cycles. |
| Telecom Line Card Interconnect | Test Equipment Digital I/O Module |
Use Scenario: Bridging FPGA-configured control bus to legacy ASIC-based signal processing engines in base station radios. IC Role / Device Role / Timing Role: Dual-section transceiver providing isolated A↔B and B↔A paths with independent enable timing for protocol handshaking. Use Value: Distributed power/ground pins suppress EMI in dense RF-adjacent layouts; MSL-1 rating enables lead-free reflow compatibility. |
Use Scenario: Providing programmable digital stimulus/response channels between test controller and DUT in automated test systems. IC Role / Device Role / Timing Role: High-drive 3-state interface managing bi-directional pattern generation and capture on 16-bit parallel test buses. Use Value: –32-mA IOH ensures clean logic-high transitions into capacitive probe loads; latch-up immunity >500 mA withstands ESD events during probing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lower voltage range (1.65–3.6 V), 24-mA drive, no bus-hold, CMOS-only process | Targeted for 3.3-V systems only; requires external pull-ups; unsuitable for 5-V mixed-voltage backplanes | Select when operating exclusively at 3.3 V and lower power consumption outweighs bus-hold convenience. |
| SN74ABT16245DGGR | Same pinout and function but lacks bus-hold circuitry; otherwise identical electrical specs and timing | Requires external 10-kΩ pull-up/pull-down resistors on all 32 data lines to prevent floating inputs | Choose only if bus-hold is unnecessary and BOM cost reduction justifies added passives and layout complexity. |
Compared with SN74LVC16245ADGGR, SN74ABTH16245DGGR provides native 5-V operation and bus-hold-critical for legacy industrial systems-while SN74ABT16245DGGR offers identical timing and drive but increases design effort via external biasing.
Availability
SN74ABTH16245DGGR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and telecom line card interconnects requiring stable component supply and long-term production continuity.
Supply support for SN74ABTH16245DGGR 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 decades of heritage in logic and interface solutions.
The ABTH family was engineered specifically for high-speed, noise-immune 5-V bus interfacing in industrial and telecom infrastructure-prioritizing ground-bounce suppression, power sequencing safety, and PCB layout efficiency.
FAQ
What is the maximum clock frequency supported by SN74ABTH16245DGGR?
The SN74ABTH16245DGGR does not operate on a clock signal-it is an asynchronous transceiver. Its usable data rate is determined by propagation delay and load capacitance. With tPHL/tPLH ≤ 3.9 ns (typ) at CL = 50 pF, it reliably supports bus toggle rates exceeding 100 MHz in well-designed 5-V systems.
Does SN74ABTH16245DGGR require external pull-up resistors on data lines?
No. The SN74ABTH16245DGGR integrates active bus-hold circuitry on all 32 data inputs (A and B ports), maintaining valid logic levels without external components. This eliminates typical 10-kΩ pull-ups, reducing BOM cost and PCB real estate.
Can SN74ABTH16245DGGR be used in mixed-voltage systems with 3.3-V logic?
SN74ABTH16245DGGR is specified only for 4.5–5.5 V operation and is not 3.3-V tolerant on inputs or outputs. Using it with 3.3-V logic requires level-shifting circuitry; for native 3.3-V systems, consider SN74LVC16245ADGGR instead.
What is the thermal performance of SN74ABTH16245DGGR in its DGG package?
The SN74ABTH16245DGGR in TSSOP-48 (DGG) has θJA = 89°C/W. Under worst-case conditions (64-mA IOL on all 16 outputs), junction temperature rise remains within safe limits on standard 2-layer boards, enabling full drive capability without forced air or heatsinking.
How does SN74ABTH16245DGGR behave during power-up and power-down sequences?
When VCC drops below 2.1 V, the SN74ABTH16245DGGR automatically enters high-impedance state on all outputs-preventing bus contention. For guaranteed Hi-Z above 2.1 V, tie OE to VCC via a pullup resistor (value set by driver sink capability).
SN74ABTH16245DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
SN74ABTH16245DGGR FAQ
1.How can I place an order for SN74ABTH16245DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH16245DGGR 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 SN74ABTH16245DGGR reliable?
The price and inventory of SN74ABTH16245DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16245DGGR is usually 5 days.
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Once your SN74ABTH16245DGGR 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 SN74ABTH16245DGGR?
For technical support, including SN74ABTH16245DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16245DGGR requirements.
6.How does Aetrix verify that SN74ABTH16245DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16245DGGR 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 SN74ABTH16245DGGR meets industry standards.
7.What is the process for return or replacement of SN74ABTH16245DGGR?
All SN74ABTH16245DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16245DGGR, 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 SN74ABTH16245DGGR part is unused and in its original packaging.
Return procedure for SN74ABTH16245DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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