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Texas Instruments SN74ALB16245DGVR
- Part No.:
- SN74ALB16245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALB16245DGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ALB16245DGVR from Texas Instruments is a 3.3-V, 16-bit bus transceiver with 3-state outputs, designed for high-speed bidirectional data transfer between A and B buses in low-voltage systems. It features 1.3 ns typical propagation delay, ±25 mA output drive capability, and industry-standard '16245 pinout - used in memory expansion interfaces, backplane data routing, and FPGA-to-ASIC interconnects.
For engineers reviewing the SN74ALB16245DGVR datasheet, SN74ALB16245DGVR pinout, SN74ALB16245DGVR application, or SN74ALB16245DGVR equivalent, key selection criteria include its ALB BiCMOS process enabling 3.3-V operation with sub-2 ns timing, distributed VCC/GND pins for noise suppression, and flow-through architecture for optimized PCB layout in dense digital systems.
Technical Context
The SN74ALB16245DGVR implements two independent 8-bit transceiver sections (1A/1B and 2A/2B), each controlled by dedicated DIR and OE inputs. Direction control is synchronous and level-sensitive: DIR = L enables B→A transfer; DIR = H enables A→B transfer; OE = H forces all outputs into high-impedance state regardless of DIR.
Its Advanced Low-Voltage BiCMOS (ALB) process integrates Schottky diodes on all inputs to suppress overshoot/undershoot, while unity-gain input amplifiers with feedback resistors minimize propagation delay and offset voltage. Distributed power/ground pins and flow-through pin mapping reduce simultaneous switching noise and simplify layer routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 3.0 V to 3.6 V - ensures compatibility with 3.3-V logic families and tolerance against rail droop in high-current digital systems. |
| Propagation Delay (tpd) | 0.6–2.0 ns (typ. 1.3 ns at VCC = 3.3 V, CL = 50 pF) - supports >500 MHz bus toggle rates in point-to-point or lightly loaded stubbed topologies. |
| Output Drive Strength | ±25 mA (IOH/IOL) - sufficient to drive 50-pF loads across 10-cm traces without external termination in compact board layouts. |
| Input Transition Rate Limit | 5 ns/V - constrains slew-induced crosstalk and ensures reliable sampling under fast-edge conditions without requiring external RC filtering. |
| Thermal Impedance (θJA) | 58 °C/W (TSSOP-DGV package) - enables continuous operation at 85°C ambient with ≤150 mW total dissipation under full 16-bit switching. |
| ESD Rating | ±2 kV HBM - meets IEC 61000-4-2 Level 2 requirements for board-level handling and system integration without additional protection circuitry. |
Pinout & Package
TSSOP-48 (DGV) package: 12.6 mm × 6.2 mm × 1.2 mm max height, 0.5 mm pitch, gull-wing leads, RoHS-compliant matte tin lead finish, MSL Level 1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Level-sensitive signal determining data flow direction: low = B→A, high = A→B; no internal pull-up/down - requires explicit logic driving. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-low control: high = 3-state isolation; low = enabled output; enables independent gating of each 8-bit segment. |
| 1A1–1A8, 2A1–2A8 | Port A input/output terminals | Bi-directional I/O pins for first and second 8-bit bus segments; internally buffered with ALB drivers and input Schottky clamps. |
| 1B1–1B8, 2B1–2B8 | Port B input/output terminals | Bi-directional I/O pins mirroring Port A functionality; flow-through layout (A pins on left, B pins on right) minimizes trace crossing. |
| VCC (pins 7, 18, 29, 40) | Power supply | Distributed VCC connections reduce IR drop and high-frequency impedance, critical for maintaining signal integrity during simultaneous switching. |
| GND (pins 4, 11, 16, 22, 31, 38, 43, 47) | Ground reference | Eight GND pins strategically placed to provide low-inductance return paths and suppress ground bounce in multi-bit switching events. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Low-Voltage BiCMOS (ALB) process | Enables 3.3-V operation with <2 ns propagation delay and <5.6 mA ICC per buffer - eliminates need for level shifters in mixed-voltage systems. |
| Schottky diodes on all inputs | Clamps transient overshoot/undershoot to within –1.2 V to VCC+1.2 V, preventing latch-up and enabling robust interfacing with hot-swap or noisy backplanes. |
| Industry-standard '16245 pinout | Ensures drop-in replacement compatibility with legacy 74-series transceivers (e.g., SN74LVC16245) in existing PCB layouts without redesign. |
| Flow-through architecture | Ports A and B are arranged on opposite sides of the package (A left, B right), allowing straight-line trace routing and minimizing vias in high-density interconnects. |
| Distributed VCC/GND pins | Four VCC and eight GND pins reduce simultaneous switching noise by >6 dB compared to single-rail packages - critical for EMI-sensitive applications. |
Applications
| Memory Expansion Interface | FPGA-to-ASIC Data Bridge |
|---|---|
Use Scenario: Expanding local memory bandwidth between microcontroller and external SRAM/Flash using shared address/data bus. IC Role / Device Role / Timing Role: Bidirectional bus transceiver isolating controller and memory domains while enabling time-multiplexed read/write cycles. Use Value: Sub-2 ns tpd and ±25 mA drive support 100+ MHz burst transfers without wait states or external buffering. |
Use Scenario: Interfacing Xilinx Artix-7 FPGA I/O banks with ASIC-based peripheral controller operating at different voltage thresholds. IC Role / Device Role / Timing Role: Voltage-level agnostic data shuttle managing handshaked parallel transactions between heterogeneous logic domains. Use Value: ALB process ensures clean 3.3-V signaling margins even with 500-ps skew across 16-bit lanes, reducing timing closure effort. |
| Backplane Data Routing | Industrial PLC I/O Module |
Use Scenario: High-reliability data forwarding across modular backplane slots in telecom line cards or test equipment chassis. IC Role / Device Role / Timing Role: Hot-swap tolerant transceiver providing galvanic isolation between slot and backplane bus via 3-state control during insertion/removal. Use Value: Schottky-clamped inputs withstand ±2 kV ESD events and 100 V/ms transients common in field-replaceable modules. |
Use Scenario: Isolating programmable logic controller CPU bus from ruggedized I/O expansion modules subject to industrial EMI and voltage surges. IC Role / Device Role / Timing Role: Noise-immune bus repeater with distributed power/ground suppressing ground bounce during 16-channel digital output updates. Use Value: Eight GND pins and 58 °C/W θJA sustain continuous operation at 85°C ambient in sealed enclosures without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245DGVR | Lower drive (±24 mA), higher tpd (2.7 ns typ), same TSSOP-48 footprint and pinout. | Optimized for lower-power, non-speed-critical interfaces where <100 MHz operation suffices. | Select when thermal budget is constrained and timing margin exceeds 1.5 ns. |
| SN74AVC16245DGVR | Supports 1.2–3.6 V VCC, lower capacitance (Ci = 2.5 pF), but higher tpd (2.3 ns typ) and reduced noise immunity. | Targets ultra-low-voltage mixed-signal SoC interconnects, not legacy 3.3-V bus systems. | Choose only for dual-supply designs requiring 1.8-V or 2.5-V compatibility alongside 3.3-V operation. |
Compared with SN74LVC16245DGVR and SN74AVC16245DGVR, the SN74ALB16245DGVR delivers the lowest propagation delay and highest noise immunity in 3.3-V-only systems, making it optimal for speed-critical backplane and memory interface roles where timing closure and signal integrity are non-negotiable.
Availability
SN74ALB16245DGVR is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA-to-ASIC bridges, backplane data routing, industrial PLC I/O modules, and high-speed digital test equipment requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALB16245DGVR 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 over 90 years of innovation in industrial, automotive, and communications electronics.
The SN74ALB16245DGVR belongs to TI's Widebus™ family of high-speed logic devices, engineered specifically for low-voltage, high-bandwidth bus interface applications in computing, networking, and test instrumentation systems.
FAQ
What is the maximum operating temperature range for the SN74ALB16245DGVR?
The SN74ALB16245DGVR is rated for operation from –40°C to +85°C ambient temperature. This range is validated per TI's recommended operating conditions and supported by thermal characterization showing 58 °C/W junction-to-ambient resistance in the TSSOP-DGV package, enabling reliable performance in industrial and telecom environments without derating.
Does the SN74ALB16245DGVR support hot-swap operation?
The SN74ALB16245DGVR supports controlled hot-swap through its 3-state outputs and Schottky-clamped inputs. When OE is held high during insertion, all outputs remain high-impedance; input clamps limit transient voltages to –1.2 V to VCC+1.2 V, preventing damage during live backplane connection - though external current-limiting circuitry is still recommended for full compliance.
Is the SN74ALB16245DGVR pin-compatible with older 74-series transceivers?
Yes, the SN74ALB16245DGVR uses the industry-standard '16245 pinout and matches the TSSOP-48 footprint of SN74LVC16245DGVR and SN74LVCH16245ADGVR. Pin functions, spacing, and mechanical dimensions are identical - enabling direct PCB replacement without layout changes.
What is the typical supply current consumption of the SN74ALB16245DGVR?
The SN74ALB16245DGVR draws 3.7–5.6 mA per buffer (ICC/buffer) under active operation at VCC = 3.6 V, translating to ~90–135 mA for all 16 bits driven. In 3-state mode (OE high), ICCZ drops to 0.8 mA - a key advantage over non-ALB alternatives for low-idle-power systems.
Can the SN74ALB16245DGVR be used with 5-V logic systems?
No, the SN74ALB16245DGVR is strictly a 3.3-V device with absolute maximum VCC of 4.6 V and input tolerance limited to VCC + 0.5 V. Interfacing with 5-V systems requires level-shifting circuitry; TI recommends pairing it with SN74AVC4T245 or discrete resistor-divider networks for safe voltage translation.
SN74ALB16245DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALB
- Package/Case:
- 48-TFSOP (0.173", 4.40mm 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-TVSOP
SN74ALB16245DGVR FAQ
1.How can I place an order for SN74ALB16245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALB16245DGVR 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 SN74ALB16245DGVR reliable?
The price and inventory of SN74ALB16245DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALB16245DGVR is usually 5 days.
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SN74ALB16245DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALB16245DGVR 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 SN74ALB16245DGVR?
For technical support, including SN74ALB16245DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALB16245DGVR requirements.
6.How does Aetrix verify that SN74ALB16245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74ALB16245DGVR 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 SN74ALB16245DGVR meets industry standards.
7.What is the process for return or replacement of SN74ALB16245DGVR?
All SN74ALB16245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALB16245DGVR, 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 SN74ALB16245DGVR part is unused and in its original packaging.
Return procedure for SN74ALB16245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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