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Texas Instruments SN74ABTH162245DL
- Part No.:
- SN74ABTH162245DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABTH162245DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:408
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Product details
Overview
SN74ABTH162245DL from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for synchronous two-way data communication between A and B buses in industrial control and embedded computing systems. It supports bidirectional data flow controlled by DIR, enables isolation via OE, features integrated 25-Ω series resistors on A-port outputs, and operates from –40°C to 85°C at 4.5–5.5 V.
For engineers reviewing the SN74ABTH162245DL datasheet, SN74ABTH162245DL pinout, SN74ABTH162245DL application, or SN74ABTH162245DL equivalent, this page delivers verified electrical specs, DL-package pin mapping, bus-hold functionality details, and validated alternative transceivers for high-speed TTL-level bus interface design.
Technical Context
The SN74ABTH162245DL implements dual 8-bit or single 16-bit bidirectional data transfer using separate direction (DIR) and output-enable (OE) controls per section. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and fast switching (tPLH/tPHL ≤ 4.2 ns at 5 V).
It integrates bus-hold circuitry on all data inputs to maintain valid logic states without external pullups, and features distributed VCC/GND pins plus flow-through pinout to minimize noise and optimize PCB layout. A-port outputs include built-in 25-Ω series termination to suppress overshoot/undershoot during high-speed transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and mixed-voltage system rails. |
| Operating Temperature | –40°C to 85°C - Qualified for industrial-grade embedded applications without derating. |
| A-Port Output Drive | ±12 mA - Sufficient to drive 50-Ω transmission lines or multiple TTL loads directly. |
| B-Port Output Drive | ±64 mA - Supports heavy bus loading and fanout to multiple CMOS/TTL inputs. |
| Propagation Delay | ≤ 4.2 ns (A→B), ≤ 4.6 ns (B→A) - Enables reliable operation in sub-250-MHz bus timing windows. |
| Bus-Hold Current | ±100 µA - Actively retains logic state on floating inputs, eliminating need for external biasing. |
| Output Ground Bounce | VOLP < 1 V at VCC = 5 V - Reduces switching noise coupling into shared ground planes. |
Pinout & Package
SN74ABTH162245DL uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 0.300-inch body width, with 0.025-inch lead pitch and gull-wing leads. Pin 1 is located at top-left corner (Q1 quadrant), marked by a beveled edge or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | 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) | Drives corresponding port outputs into high-impedance state when high; must be pulled up to VCC for safe power-up. |
| 1A1–1A8, 2A1–2A8 | A-side data I/O terminals | Noninverting bidirectional data pins for first and second 8-bit segments; include bus-hold and 25-Ω series resistance. |
| 1B1–1B8, 2B1–2B8 | B-side data I/O terminals | Noninverting bidirectional data pins with higher drive strength (±64 mA); no internal series resistance. |
| VCC, GND | Power and ground connections | Distributed across package (pins 7, 16, 24, 32, 40, 48 for VCC; pins 4, 11, 19, 27, 35, 43 for GND) to reduce simultaneous switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω Series Resistors (A Port) | Eliminates need for external source-series termination, reducing BOM count and PCB area for point-to-point or stubbed bus topologies. |
| Active Bus-Hold Circuitry | Maintains stable logic levels on unused or unterminated data inputs, preventing metastability and EMI from floating nodes. |
| Flow-Through Pin Architecture | Input and output pins are arranged linearly (A1–A8 → B1–B8) across opposite sides, enabling straight PCB trace routing and minimizing layer transitions. |
| Distributed Power/Ground Pins | Multiple VCC and GND pins interleaved throughout the package lower impedance of supply paths and suppress ground bounce during high-speed switching. |
| Latch-Up Immunity | Exceeds 500 mA per JESD 17 - Ensures robustness against transient overcurrent events in noisy industrial environments. |
Applications
| Industrial PLC Backplane Interface | Embedded CPU Memory Expansion Bus |
|---|---|
Use Scenario: Interfacing a microcontroller's address/data bus to modular I/O cards in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional level-shifting and bus isolation transceiver managing synchronous read/write cycles between CPU and peripheral modules. Use Value: Flow-through pinout simplifies backplane routing; bus-hold prevents spurious reads during hot-swap insertion; 4.2-ns delay supports 100+ MHz bus clock rates. |
Use Scenario: Extending a SoC's external memory interface to support additional SRAM or flash devices in space-constrained edge gateway hardware. IC Role / Device Role / Timing Role: 16-bit bidirectional data buffer enabling time-multiplexed access between processor and memory banks. Use Value: Integrated 25-Ω A-port termination reduces signal reflections on 2-inch traces; ±64 mA B-port drive ensures clean edges into 10+ load capacitance. |
| Automotive Body Control Module (BCM) Diagnostics Link | Test Equipment Digital Pattern Generator |
Use Scenario: Isolating and translating diagnostic command/response traffic between a vehicle's main ECU and secondary BCM over a shared parallel test bus. IC Role / Device Role / Timing Role: Controlled-direction transceiver enabling half-duplex communication with precise OE-gated timing windows. Use Value: –40°C to 85°C rating matches automotive under-hood thermal requirements; latch-up immunity withstands load dump transients. |
Use Scenario: Driving high-fanout digital stimulus patterns from FPGA-based pattern generators into DUTs with varying input capacitance and threshold levels. IC Role / Device Role / Timing Role: Programmable-direction bus driver synchronizing multi-channel test vectors with nanosecond-level skew control. Use Value: Sub-5 ns propagation delay enables deterministic timing alignment; distributed VCC/GND minimizes pattern-dependent jitter on 16-bit parallel outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC162245DGGR | Lower voltage (1.65–3.6 V), CMOS process, no internal series resistors, 32 mA B-port drive. | Targets 3.3-V or mixed-voltage systems; lacks bus-hold and A-port termination. | Choose for low-power, 3.3-V designs where external termination and pullups are acceptable. |
| SN74ALVCH162245GR | Wider voltage range (1.65–3.6 V), higher speed (tPD ≤ 2.8 ns), no bus-hold, 24 mA B-port drive. | Suitable for high-speed 1.8-V/2.5-V interfaces; requires external biasing and termination. | Select when sub-3 ns timing and ultra-low static current (< 20 µA) are critical, and board space allows discrete components. |
Compared with SN74ABTH162245DL, SN74LVC162245DGGR offers lower power and voltage flexibility but sacrifices bus-hold and A-port termination; SN74ALVCH162245GR delivers faster timing and broader voltage support yet requires external design elements the DL variant integrates natively.
Availability
SN74ABTH162245DL is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and automotive diagnostics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant SSOP packaging.
Supply support for SN74ABTH162245DL 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 solutions, with decades of heritage in logic and interface IC development.
The ABTH family was engineered for high-speed, noise-immune 5-V TTL bus interfacing in industrial and telecom infrastructure, emphasizing signal integrity, latch-up resilience, and simplified PCB layout.
FAQ
What is the maximum continuous output current rating for the A-port and B-port of SN74ABTH162245DL?
The SN74ABTH162245DL A-port is rated for ±12 mA continuous output current, while the B-port supports ±64 mA. These values are specified under recommended operating conditions (VCC = 4.5–5.5 V, TA = –40°C to 85°C) and reflect guaranteed drive capability into standard TTL/CMOS loads without exceeding thermal limits or degrading timing performance. The SN74ABTH162245DL's B-port higher drive strength enables direct interfacing with heavier bus loads.
Does SN74ABTH162245DL require external pull-up resistors on its DIR and OE inputs?
No - SN74ABTH162245DL does not require external pull-ups on DIR inputs, as they are TTL-compatible and accept standard logic levels. However, OE inputs must be tied to VCC through a pull-up resistor during power-up/down to ensure outputs remain in high-impedance state; TI recommends ≥10 kΩ based on driver sink capability. This requirement applies specifically to the SN74ABTH162245DL to prevent bus contention at power transition.
Can SN74ABTH162245DL be used in a 3.3-V system?
No - SN74ABTH162245DL is strictly a 5-V device with minimum VCC = 4.5 V and VIH = 2.0 V; it is not characterized or guaranteed for reliable operation below 4.5 V. For 3.3-V applications, consider pin-compatible alternatives like SN74LVC162245DGGR. Using SN74ABTH162245DL at 3.3 V risks undefined logic states, excessive ICC, and failure to meet timing specifications.
How does the bus-hold feature function on SN74ABTH162245DL data inputs?
The SN74ABTH162245DL integrates active bus-hold circuitry on all A- and B-side data inputs, providing ±100 µA holding current to retain the last-valid logic state when inputs float. This eliminates external pull-up/pull-down resistors and prevents metastability in unconnected or unterminated stubs. Bus-hold activation is automatic and requires no configuration - a core functional attribute of the SN74ABTH162245DL design.
What is the thermal resistance (θJA) of SN74ABTH162245DL in its DL package?
The SN74ABTH162245DL in the SSOP-DL package has a junction-to-ambient thermal resistance (θJA) of 94°C/W, measured per JESD 51 standards. This value assumes standard JEDEC 2-layer board conditions and informs thermal design margining - for example, at 32 mA ICC and 5 V supply, power dissipation remains under 160 mW, resulting in <15°C junction rise above ambient. This θJA is specific to the DL package variant of SN74ABTH162245DL.
SN74ABTH162245DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 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
SN74ABTH162245DL FAQ
1.How can I place an order for SN74ABTH162245DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH162245DL 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 SN74ABTH162245DL reliable?
The price and inventory of SN74ABTH162245DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH162245DL is usually 5 days.
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SN74ABTH162245DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH162245DL 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 SN74ABTH162245DL?
For technical support, including SN74ABTH162245DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH162245DL requirements.
6.How does Aetrix verify that SN74ABTH162245DL is sourced from the original manufacturer or authorized distributors?
All SN74ABTH162245DL 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 SN74ABTH162245DL meets industry standards.
7.What is the process for return or replacement of SN74ABTH162245DL?
All SN74ABTH162245DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH162245DL, 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 SN74ABTH162245DL part is unused and in its original packaging.
Return procedure for SN74ABTH162245DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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