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Texas Instruments SN74ALB16245DLR
- Part No.:
- SN74ALB16245DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALB16245DLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,423
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Product details
Overview
SN74ALB16245DLR from Texas Instruments is a 3.3-V, 16-bit, 3-state bus transceiver with dual 8-bit bidirectional data paths, 1.3 ns typical propagation delay (VCC = 3.3 V), ±25 mA output drive, and industry-standard '16245 pinout. It operates across –40°C to 85°C and uses Advanced Low-Voltage BiCMOS (ALB) technology for high-speed logic-level translation in memory and processor interconnects.
For engineers reviewing the SN74ALB16245DLR datasheet, SN74ALB16245DLR pinout, SN74ALB16245DLR application, or SN74ALB16245DLR equivalent, key selection criteria include its flow-through architecture for optimized PCB layout, distributed VCC/GND pins minimizing switching noise, Schottky-clamped inputs eliminating overshoot/undershoot, and support for A↔B or B↔A bidirectional data routing under DIR/OE control.
Technical Context
The SN74ALB16245DLR implements two independent 8-bit transceiver sections, each with dedicated DIR (direction) and OE (output enable) controls. Its ALB process enables 3.3-V operation while maintaining TTL-compatible input thresholds and rail-to-rail output swing capability up to ±25 mA.
Each section supports true bidirectional data flow: when DIR = L and OE = L, data transfers from B bus to A bus; when DIR = H and OE = L, data flows from A bus to B bus; OE = H forces all outputs into high-impedance state regardless of DIR. Propagation delay is minimized via unity-gain input amplifiers and feedback resistors enabling precise input-to-output tracking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 3.0 V to 3.6 V - Ensures stable operation in modern 3.3-V digital systems without overvoltage risk. |
| tpd Propagation Delay | 0.6–2.0 ns (typ 1.3 ns at 3.3 V) - Enables use in sub-1-GHz bus timing paths with tight skew budgets. |
| IOL / IOH Drive | ±25 mA per output - Sufficient to drive 50-pF loads at >100 MHz without signal degradation. |
| Input Transition Rate | 5 ns/V max - Compatible with fast-edge CMOS/TTL sources without excessive ringing or crosstalk. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and communications equipment deployment. |
| IOZH / IOZL Off-State Leakage | ±20 µA max - Guarantees robust bus isolation during 3-state disable, preventing unintended loading. |
| ICCZ Quiescent Current | 0.8 mA max - Low static power draw supports energy-sensitive backplane and module designs. |
Pinout & Package
SN74ALB16245DLR is housed in a 48-pin SSOP (Shrink Small-Outline Package) with 0.5-mm lead pitch, 12.6 mm × 7.9 mm body size, and 1.2 mm max height - optimized for high-density board layouts requiring thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Selects data flow direction per 8-bit section: L = B→A, H = A→B; no effect when OE = H. |
| 1OE, 2OE | Output Enable Input | Active-low; disables both A and B ports of respective section into high-Z state when high. |
| 1A1–1A8, 2A1–2A8 | A-Side Data I/O | Bidirectional data terminals for first and second 8-bit A buses; internally connected to transceiver core. |
| 1B1–1B8, 2B1–2B8 | B-Side Data I/O | Bidirectional data terminals for first and second 8-bit B buses; electrically isolated from A-side when OE = H. |
| 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 minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Low-Voltage BiCMOS (ALB) | Enables 3.3-V operation with TTL-compatible input thresholds and full-rail CMOS output swing. |
| Schottky Diode Clamping on All Inputs | Prevents input voltage overshoot/undershoot beyond VCC+0.5 V or GND–0.5 V, protecting internal circuitry. |
| Flow-Through Pin Architecture | Minimizes trace length and layer transitions in PCB routing, reducing skew and improving signal integrity. |
| Distributed VCC and GND Pins | Reduces localized IR drop and high-frequency ground bounce across 16-bit data paths. |
| Industry-Standard '16245 Pinout | Ensures drop-in compatibility with legacy 74-series transceivers in existing board designs and tooling. |
Applications
| Memory Subsystem Interconnect | Processor-to-Peripheral Bus Interface |
|---|---|
|
Use Scenario: Bidirectional data transfer between 32-bit microprocessor local bus and 16-bit SRAM/Flash memory banks. IC Role / Device Role / Timing Role: Level-shifting transceiver managing address/data multiplexing and bus turnaround timing. Use Value: 1.3 ns tpd ensures setup/hold compliance at 80-MHz bus clocks; ±25 mA drive sustains signal integrity over 4-inch traces. |
Use Scenario: Isolating and translating control/data signals between ARM Cortex-A8 host and FPGA-based peripheral bridge. IC Role / Device Role / Timing Role: Direction-controlled buffer enabling synchronous read/write handshaking across voltage-domain boundaries. Use Value: Dual 8-bit sections allow independent control of command/address vs. data lanes; flow-through layout simplifies FPGA pin assignment. |
| Backplane Data Routing | Industrial PLC I/O Module Expansion |
|
Use Scenario: High-speed parallel data forwarding across modular backplane slots in telecom line cards. IC Role / Device Role / Timing Role: Hot-swap-capable bus isolator with controlled enable/disable timing to prevent glitches during insertion. Use Value: 3.0–3.6 V supply range matches backplane power distribution; 4.2 ns max tdis prevents metastability during slot reconfiguration. |
Use Scenario: Extending parallel I/O capacity between main controller and remote I/O modules via ribbon-cable interconnects. IC Role / Device Role / Timing Role: Noise-immune bus repeater compensating for signal attenuation and skew over 30-cm cables. Use Value: Schottky-clamped inputs reject ESD-induced transients; distributed GND pins suppress common-mode noise in noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lower drive (±24 mA), higher ICCZ (2 µA), same 48-pin TSSOP but LVC process instead of ALB. | Optimized for lower static power and 1.65–3.6 V flexibility; less suitable for ultra-low-noise, high-speed backplanes. | Choose for cost-sensitive, mixed-voltage systems where 1.3 ns tpd is not required. |
| SN74ABT16245DGG | 5-V tolerant inputs, higher drive (±64 mA), 3.3-V only outputs, ABT process with faster tpd (0.9 ns typ). | Supports legacy 5-V logic interfacing; requires level-shifting on A/B buses if connecting to 3.3-V-only devices. | Choose when interfacing with 5-V peripherals or when maximum speed (sub-1 ns) outweighs ALB's noise immunity. |
Compared with SN74LVC16245ADGGR and SN74ABT16245DGG, the SN74ALB16245DLR uniquely balances ultra-low propagation delay, Schottky input protection, and distributed power integrity-making it optimal for noise-critical, high-clock-rate 3.3-V bus extensions where signal fidelity and timing margin are prioritized over voltage flexibility or raw drive strength.
Availability
SN74ALB16245DLR is available at Aetrix Electronics and suitable for memory subsystem interconnect, processor-to-peripheral interface, and industrial PLC I/O expansion requiring stable component supply and long-term industrial lifecycle support.
Supply support for SN74ALB16245DLR 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 expertise in high-speed logic and interface solutions.
The SN74ALB16245DLR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for low-noise, high-speed 3.3-V system interconnect in computing, communications, and industrial control applications.
FAQ
What is the operating temperature range for SN74ALB16245DLR?
The SN74ALB16245DLR is rated for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per TI's recommended operating conditions and supported by thermal impedance data (θJA = 63°C/W for DL package), making SN74ALB16245DLR suitable for deployment in uncontrolled ambient environments such as factory automation controllers and telecom base station modules.
Does SN74ALB16245DLR support 5-V tolerant inputs?
No, SN74ALB16245DLR does not support 5-V tolerant inputs. Its absolute maximum input voltage is VCC + 0.5 V (≤4.1 V at VCC = 3.6 V), and recommended VI limits are 0 V to VCC. Direct connection to 5-V logic sources risks permanent damage; level-shifting circuitry is required for interoperability with 5-V systems.
How many independent transceiver sections does SN74ALB16245DLR contain?
The SN74ALB16245DLR contains two independent 8-bit transceiver sections (Section 1: pins 1DIR/1OE/1A1–1A8/1B1–1B8; Section 2: pins 2DIR/2OE/2A1–2A8/2B1–2B8), each with dedicated direction and output-enable controls. This allows concurrent bidirectional data routing across separate bus segments without shared control timing constraints.
What package type is used for SN74ALB16245DLR?
SN74ALB16245DLR uses the SSOP (Shrink Small-Outline Package) with 48 pins, designated DL in TI's packaging nomenclature. Its dimensions are 12.6 mm × 7.9 mm × 1.2 mm max height, 0.5-mm lead pitch, and five GND pins plus four VCC pins for enhanced power integrity - distinct from the TSSOP (DGG) and TVSOP (DGV) variants of the same family.
Can SN74ALB16245DLR be used in hot-swap applications?
Yes, SN74ALB16245DLR supports hot-swap operation due to its bus-hold-free design, Schottky-clamped inputs limiting transient excursions, and guaranteed high-impedance state (IOZL/IOZH ≤ ±20 µA) when OE is asserted. However, external current-limiting resistors and sequencing control of VCC/OE are recommended to manage inrush and ensure glitch-free enable/disable transitions during live insertion.
SN74ALB16245DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALB
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 25mA, 25mA
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ALB16245DLR FAQ
1.How can I place an order for SN74ALB16245DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALB16245DLR 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 SN74ALB16245DLR reliable?
The price and inventory of SN74ALB16245DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALB16245DLR is usually 5 days.
3.What payment methods are accepted for SN74ALB16245DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALB16245DLR transactions.
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4.How is shipping managed for SN74ALB16245DLR?
SN74ALB16245DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALB16245DLR 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 SN74ALB16245DLR?
For technical support, including SN74ALB16245DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALB16245DLR requirements.
6.How does Aetrix verify that SN74ALB16245DLR is sourced from the original manufacturer or authorized distributors?
All SN74ALB16245DLR 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 SN74ALB16245DLR meets industry standards.
7.What is the process for return or replacement of SN74ALB16245DLR?
All SN74ALB16245DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALB16245DLR, 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 SN74ALB16245DLR part is unused and in its original packaging.
Return procedure for SN74ALB16245DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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