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Texas Instruments SN74ABT162245DL
- Part No.:
- SN74ABT162245DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT162245DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,166
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Product details
Overview
SN74ABT162245DL from Texas Instruments is a 16-bit noninverting 3-state transceiver in SSOP-48 package, supporting bidirectional synchronous bus communication with ±12 mA A-port drive, 25-Ω integrated series termination, and Ioff partial-power-down protection. It operates from 4.5 V to 5.5 V across −40°C to 85°C and is used in high-speed backplane and motherboard data routing.
For engineers reviewing the SN74ABT162245DL datasheet, SN74ABT162245DL pinout, SN74ABT162245DL application, or SN74ABT162245DL equivalent, key selection criteria include direction-control timing margins, output ground bounce (VOLP <1 V), distributed VCC/GND pin layout for noise suppression, and compatibility with 5-V TTL/CMOS buses requiring flow-through PCB routing.
Technical Context
This device implements dual 8-bit or unified 16-bit bidirectional data transfer using separate DIR and OE controls per section. Its flow-through architecture places A- and B-port pins on opposite sides of the SSOP-48 package to minimize trace crossovers and signal stubs.
The A-port outputs integrate 25-Ω series resistors to suppress overshoot/undershoot without external components, while Ioff circuitry ensures ≤±100 µA leakage when VCC = 0 V-enabling safe hot-insertion and partial power-down operation in mixed-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL logic rails and industrial 5-V supply tolerances |
| Operating Temperature | −40°C to +85°C - qualified for commercial and extended-temperature embedded control applications |
| A-Port Output Drive | ±12 mA - sufficient to drive 50-pF loads at >40 MHz without external buffers |
| B-Port Output Drive | ±64 mA - supports heavier bus loading and fanout to multiple receivers |
| Propagation Delay | 1 ns to 4.9 ns (A→B) - enables sub-200 MHz bus clocking with deterministic timing margins |
| VOLP (Ground Bounce) | <1 V at VCC = 5 V - reduces switching noise-induced logic errors in dense PCB layouts |
| Ioff Leakage | ±100 µA at VCC = 0 V - prevents backflow current during power sequencing or hot-swap events |
Pinout & Package
SN74ABT162245DL uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch, 12.4 mm × 6.0 mm body, and 1.2 mm max height. Pin 1 is marked by a beveled corner and located in Quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Low = B→A data flow; High = A→B data flow; enables independent bidirectional operation of two 8-bit lanes |
| 1OE, 2OE | Output enable input (per 8-bit section) | Low = outputs active; High = 3-state isolation; required tie to VCC via pullup for power-up high-impedance safety |
| 1A1–1A8, 2A1–2A8 | A-side data I/O (input or output) | Noninverting transceiver ports with 25-Ω series resistance; source/sink up to 12 mA |
| 1B1–1B8, 2B1–2B8 | B-side data I/O (input or output) | Noninverting transceiver ports; source/sink up to 64 mA on B port; no internal series resistance |
| VCC (Pins 7, 20, 32, 45) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN impedance across high-frequency operation |
| GND (Pins 4, 11, 23, 36, 48) | Ground reference | Five dedicated GND pins provide low-inductance return paths and minimize ground bounce during fast edge transitions |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω series termination | Eliminates need for discrete 25-Ω resistors on A-port traces-reducing BOM count and PCB area in space-constrained designs |
| Distributed VCC/GND pinning | Four VCC and five GND pins interleaved across package edges suppress high-speed switching noise and improve signal integrity |
| Flow-through pin architecture | A-ports on left side, B-ports on right side-enables straight-layer PCB routing with zero layer jumps or vias between transceiver sections |
| Ioff partial-power-down support | Prevents damaging current backflow when VCC is off but A/B buses remain live-critical for hot-plug and modular system architectures |
| Latch-up immunity | Exceeds 500 mA per JESD17-ensures robust operation under transient overvoltage or ESD stress in industrial environments |
Applications
| Backplane Data Routing | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Bidirectional data exchange between CPU module and peripheral I/O cards in modular rack-mounted controllers. IC Role / Device Role / Timing Role: 16-bit transceiver isolating and level-shifting between isolated 5-V control bus and local card bus with direction arbitration. Use Value: Flow-through pinout enables direct top-layer routing across backplane connectors; Ioff prevents backfeed during card insertion/removal. |
Use Scenario: Extending parallel digital I/O capacity between main controller and remote terminal units in factory automation systems. IC Role / Device Role / Timing Role: Synchronous 16-bit bus repeater buffering signals between microcontroller and opto-isolated I/O banks. Use Value: Distributed VCC/GND pins suppress noise from relay coil switching; ±64 mA B-port drive handles long traces to remote modules. |
| Test Equipment Bus Interface | Legacy System Interfacing |
Use Scenario: Connecting FPGA-based pattern generators to DUT interfaces requiring precise 5-V TTL timing and bidirectional handshake. IC Role / Device Role / Timing Role: Low-skew transceiver managing data and strobe lines between test controller and DUT with DIR-controlled flow direction. Use Value: 1 ns min propagation delay and <1 V VOLP ensure setup/hold compliance at 50+ MHz test clock rates. |
Use Scenario: Bridging modern microcontrollers to legacy parallel peripherals (e.g., dot-matrix printers, EPROM programmers) with 5-V bus requirements. IC Role / Device Role / Timing Role: Level-consistent 16-bit translator enabling software-configurable read/write access to legacy devices. Use Value: Integrated A-port series resistors eliminate external termination, simplifying interface design while maintaining signal fidelity over 10+ cm traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DGGR | TSSOP-48 package (24.4 mm × 4.4 mm); 0.65 mm pitch; higher θJA (70°C/W) vs. DL's 63°C/W | Better suited for automated SMT assembly with tighter board space constraints; lower thermal mass limits sustained high-current operation | Select DGGR for volume production with pick-and-place optimization; choose DL for thermal-limited or manual-assembly scenarios. |
| SN74LVC162245DGGR | 3.3-V only (1.65–3.6 V); lower drive (±24 mA B-port); no integrated A-port series resistors | Designed for mixed-voltage 3.3-V systems interfacing to 5-V peripherals via level-shifting; lacks Ioff and ground-bounce mitigation features | Use LVC version only in pure 3.3-V domains with external termination; retain ABT162245DL for 5-V native, noise-sensitive, or hot-swap applications. |
Compared with SN74ABT162245DGGR and SN74LVC162245DGGR, SN74ABT162245DL provides superior noise immunity via distributed power pins and ground bounce suppression, maintains full 5-V compatibility, and delivers higher B-port drive-making it optimal for industrial backplanes where signal integrity and thermal stability outweigh footprint savings.
Availability
SN74ABT162245DL is available at Aetrix Electronics and suitable for industrial PLCs, test equipment interfaces, legacy system upgrades, and backplane data routing requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT162245DL 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 industrial-grade reliability validation.
SN74ABT162245DL belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, high-density 5-V TTL bus expansion in industrial control, instrumentation, and communications infrastructure.
FAQ
What is the maximum continuous output current rating for the B port of SN74ABT162245DL?
The SN74ABT162245DL B port is rated for ±64 mA per output at VCC = 4.5 V, as specified in the Absolute Maximum Ratings table. This allows driving heavier capacitive loads or multiple TTL inputs without external buffers, though sustained operation near this limit requires attention to thermal derating per the 63°C/W θJA value.
Does SN74ABT162245DL support hot-swap operation, and how is it implemented?
Yes, SN74ABT162245DL supports hot-swap via its Ioff circuitry, which disables outputs and limits leakage to ±100 µA when VCC = 0 V. This prevents damaging current backflow from live A/B buses into a powered-down device-enabling safe insertion/removal in modular chassis systems without disrupting other modules.
How does the integrated 25-Ω series resistor on the A port of SN74ABT162245DL affect signal integrity?
The integrated 25-Ω series resistor on each A-port output of SN74ABT162245DL damps signal reflections and reduces overshoot/undershoot on transmission lines, particularly for traces >5 cm. It eliminates the need for discrete series resistors, saving PCB area and reducing parasitic inductance associated with external components.
What is the recommended power-up sequence for SN74ABT162245DL to ensure high-impedance state at startup?
To guarantee high-impedance state during power-up, OE inputs of SN74ABT162245DL must be held high until VCC stabilizes. TI recommends tying 1OE and 2OE to VCC through a pullup resistor (value determined by driver sink capability), as floating OE pins may cause unintended bus contention before initialization completes.
Can SN74ABT162245DL be used as two independent 8-bit transceivers, and how is direction control managed?
Yes, SN74ABT162245DL can operate as two independent 8-bit transceivers. Each half has dedicated DIR (1DIR/2DIR) and OE (1OE/2OE) inputs, allowing separate control of data flow direction and output enable states-enabling concurrent A↔B transfers on one section while isolating the other, ideal for multi-bus arbitration schemes.
SN74ABT162245DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- 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
SN74ABT162245DL FAQ
1.How can I place an order for SN74ABT162245DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT162245DL 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 SN74ABT162245DL reliable?
The price and inventory of SN74ABT162245DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT162245DL is usually 5 days.
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Once your SN74ABT162245DL 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 SN74ABT162245DL?
For technical support, including SN74ABT162245DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT162245DL requirements.
6.How does Aetrix verify that SN74ABT162245DL is sourced from the original manufacturer or authorized distributors?
All SN74ABT162245DL 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 SN74ABT162245DL meets industry standards.
7.What is the process for return or replacement of SN74ABT162245DL?
All SN74ABT162245DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT162245DL, 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 SN74ABT162245DL part is unused and in its original packaging.
Return procedure for SN74ABT162245DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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