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Texas Instruments 74ABTH162245DLG4
- Part No.:
- 74ABTH162245DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ABTH162245DLG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
74ABTH162245DLG4 from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for synchronous bidirectional data transfer between A and B buses in high-speed digital systems. It supports ±12 mA A-port drive, 64 mA B-port sink capability, and features integrated 25-Ω series resistors on A-port outputs to suppress signal overshoot-used in industrial backplane interfaces and memory expansion subsystems.
For engineers reviewing the 74ABTH162245DLG4 datasheet, 74ABTH162245DLG4 pinout, 74ABTH162245DLG4 application, or 74ABTH162245DLG4 equivalent, key selection criteria include direction-control timing (tPLH/tPHL ≤ 4.9 ns), bus-hold input retention, distributed VCC/GND pin layout for noise suppression, and SSOP-48 package compatibility with legacy board layouts.
Technical Context
This device implements dual 8-bit or unified 16-bit bidirectional data routing via independent DIR and OE controls per section. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible voltage thresholds (VIL = 0.8 V, VIH = 2 V) and robust latch-up immunity (>500 mA).
The flow-through pin architecture minimizes trace crossovers on PCBs, and active bus-hold circuitry eliminates external pullup/pulldown resistors on all data inputs-reducing component count and improving floating-input reliability during hot-swap or partial-power-down conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and mixed-voltage system rails. |
| A-port IOL/IOH | 12 mA sink / –12 mA source - Sufficient to drive terminated stubs or multiple CMOS inputs without external buffering. |
| B-port IOL | 64 mA max - Supports high-fanout backplane loads and legacy TTL bus termination schemes. |
| tPLH/tPHL (A→B) | 1 ns min / 4.1 ns max at 5 V - Enables reliable operation in 100+ MHz bus cycles with margin for skew and jitter. |
| Bus-Hold Current | ±100 µA at VCC = 4.5 V - Maintains valid logic state on un-driven inputs without external resistors, reducing BOM cost and layout area. |
| Output Ground Bounce (VOLP) | < 1 V at VCC = 5 V - Minimizes switching noise coupling into analog sections or adjacent signal lines. |
| θJA (DL package) | 94 °C/W - Defines thermal derating limits for continuous 16-bit operation in enclosed industrial enclosures. |
Pinout & Package
74ABTH162245DLG4 uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch and 380-mil body width. The package features distributed VCC and GND pins across both sides to reduce simultaneous switching noise and improve high-frequency decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: DIR = L enables B→A; DIR = H enables A→B. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-low: OE = L enables transceiver; OE = H forces all outputs to high-impedance state. |
| 1A1–1A8, 2A1–2A8 | A-side data I/O terminals | Noninverting bidirectional ports with integrated 25-Ω series resistors; support ±12 mA drive. |
| 1B1–1B8, 2B1–2B8 | B-side data I/O terminals | Noninverting bidirectional ports optimized for 64 mA sink; no internal series resistance. |
| VCC, GND | Power supply and ground | Multiple distributed pins minimize IR drop and inductive coupling; requires local 0.1-µF ceramic decoupling per VCC pair. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω A-port series resistors | Eliminates need for external source termination, reducing PCB layer count and assembly cost in point-to-point or daisy-chain topologies. |
| Active bus-hold on all data inputs | Maintains stable logic levels on unused or disconnected A/B port pins-critical for hot-plug-capable backplanes and modular systems. |
| Flow-through pin architecture | Input and output pins are arranged linearly (e.g., A1→B1, A2→B2), enabling straight trace routing and minimizing vias in dense interconnect layers. |
| Distributed VCC/GND pin configuration | Reduces simultaneous switching output (SSO) noise by >30% compared to single-rail packages-verified in EMI testing per CISPR 22 Class B. |
| Latch-up immunity & ESD protection | Exceeds 500 mA latch-up current (JESD17) and 2000 V HBM ESD (MIL-STD-833), supporting rugged deployment in factory automation environments. |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
Use Scenario: Bidirectional data exchange between CPU module and peripheral I/O cards in modular PLC chassis. IC Role / Device Role / Timing Role: 16-bit transceiver isolating and level-shifting between isolated A-bus (CPU side) and B-bus (card side) under DIR-controlled flow. Use Value: Bus-hold prevents floating states during card insertion/removal; 64 mA B-port drive sustains signal integrity across 12-inch backplane traces. | Use Scenario: Extending data bus width between SoC and parallel NOR Flash or SRAM in embedded controllers. IC Role / Device Role / Timing Role: Noninverting transceiver enabling read/write arbitration between memory controller and multi-chip memory banks. Use Value: 4.1 ns A→B propagation delay meets 100-MHz asynchronous read timing; integrated series resistors suppress reflections on 50-Ω controlled-impedance traces. |
| Test Equipment Data Acquisition | Legacy System Bus Bridge |
Use Scenario: Synchronizing high-speed ADC/DAC sample data between FPGA acquisition engine and host processor bus. IC Role / Device Role / Timing Role: Direction-controlled buffer managing time-critical data bursts from dual-channel 16-bit ADCs to PCI-like host interface. Use Value: tPZL/tPLZ ≤ 6.4 ns ensures clean enable/disable transitions during sample windowing; low ground bounce avoids analog reference contamination. | Use Scenario: Interfacing modern microcontroller peripherals to legacy ISA or VMEbus-based instrumentation modules. IC Role / Device Role / Timing Role: Voltage- and protocol-transparent bridge translating between 3.3-V MCU data bus and 5-V legacy bus timing domains. Use Value: TTL-compatible input thresholds (VIH = 2 V) and 5-V tolerant outputs eliminate level-shifters; SSOP-DL footprint matches legacy socket layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DLR | Same ABTH family, identical pinout and AC specs; differs only in RoHS compliance labeling (no G4 suffix) and tape/reel packaging (2000 vs. 25 units). | No functional difference; suitable for volume production where reel quantity and marking conventions align with procurement policy. | Select when standard tape-and-reel logistics (2000-unit reels) and TI's base part-numbering convention are preferred over G4-marked variants. |
| 74LVTH162245MTD | Lower VCC range (2.7–3.6 V); 32 mA B-port drive; 3.3-V-only I/O; no bus-hold; different pinout (TSSOP-48, not DL). | Designed for 3.3-V systems only; unsuitable for 5-V backplanes or mixed-voltage isolation without level translation. | Choose only for new 3.3-V designs requiring lower power; not a drop-in replacement due to voltage incompatibility and missing bus-hold. |
Compared with SN74ABT162245DLR, the 74ABTH162245DLG4 offers identical electrical performance but ships in smaller 25-unit trays-ideal for prototyping and low-volume validation. Versus 74LVTH162245MTD, it delivers full 5-V tolerance, higher drive strength, and bus-hold-making it the sole choice for industrial 5-V bus bridging where signal integrity and floating-input robustness are mandatory.
Availability
74ABTH162245DLG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and test equipment data acquisition requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for 74ABTH162245DLG4 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 heritage in high-reliability interface ICs.
The ABTH162245 belongs to TI's Widebus™ family of high-speed bus transceivers, engineered specifically for noise-immune, high-fanout data routing in industrial control, test instrumentation, and legacy-system upgrade applications.
FAQ
What is the operating temperature range for the 74ABTH162245DLG4?
The 74ABTH162245DLG4 is characterized for operation from –40°C to +85°C, matching the commercial-grade SN74ABTH162245 specification. It is not rated for extended military temperature ranges (–55°C to +125°C), which apply only to the SN54ABTH162245 variant in WD ceramic packaging.
Does the 74ABTH162245DLG4 require external pull-up resistors on its DIR or OE inputs?
No-external pull-up resistors are not required on DIR or OE inputs of the 74ABTH162245DLG4, as these are standard TTL-compatible control inputs. However, TI recommends tying OE to VCC through a pull-up resistor during power-up to guarantee high-impedance state initialization; minimum value depends on driver sink capability.
Can the 74ABTH162245DLG4 be used as two independent 8-bit transceivers?
Yes-the 74ABTH162245DLG4 contains two functionally independent 8-bit sections, each with dedicated DIR and OE controls (1DIR/1OE and 2DIR/2OE). This allows concurrent A↔B data flow in opposite directions across the same device, optimizing board space in multi-bus architectures.
What is the purpose of the 25-Ω series resistors on the A-port outputs of the 74ABTH162245DLG4?
The 25-Ω series resistors integrated into the A-port outputs of the 74ABTH162245DLG4 serve as source terminators to damp signal reflections on transmission lines. They eliminate the need for discrete resistors in point-to-point or short-stub topologies, directly improving edge fidelity and reducing EMI in high-speed 5-V bus designs.
Is the 74ABTH162245DLG4 pin-compatible with the SN74ABTH162245DL?
Yes-the 74ABTH162245DLG4 and SN74ABTH162245DL share identical SSOP-48 (DL) package dimensions, pinout, and electrical specifications. The "G4" suffix denotes Green (RoHS & no Sb/Br) finish and specific tape-and-reel packaging (25 units/tray), but does not affect pin compatibility or functional behavior.
74ABTH162245DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- 12mA, 12mA; 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
74ABTH162245DLG4 FAQ
1.How can I place an order for 74ABTH162245DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABTH162245DLG4 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 74ABTH162245DLG4 reliable?
The price and inventory of 74ABTH162245DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABTH162245DLG4 is usually 5 days.
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Once your 74ABTH162245DLG4 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 74ABTH162245DLG4?
For technical support, including 74ABTH162245DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABTH162245DLG4 requirements.
6.How does Aetrix verify that 74ABTH162245DLG4 is sourced from the original manufacturer or authorized distributors?
All 74ABTH162245DLG4 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 74ABTH162245DLG4 meets industry standards.
7.What is the process for return or replacement of 74ABTH162245DLG4?
All 74ABTH162245DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABTH162245DLG4, 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 74ABTH162245DLG4 part is unused and in its original packaging.
Return procedure for 74ABTH162245DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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