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Texas Instruments SN74ABT16245ADL
- Part No.:
- SN74ABT16245ADL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16245ADL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,567
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Product details
Overview
SN74ABT16245ADL from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs in a 48-pin SSOP (DL) package, operating from 4.5 V to 5.5 V supply, delivering ±32 mA high-drive output current and supporting bidirectional data flow between A and B buses under DIR/OE control for industrial backplane and memory interface applications.
For engineers reviewing the SN74ABT16245ADL datasheet, SN74ABT16245ADL pinout, SN74ABT16245ADL application, or SN74ABT16245ADL equivalent, key selection considerations include its 3.9 ns typical propagation delay (tPLH), 0.55 V typical VOL at 64 mA IOL, high-impedance state during power-up/down, distributed VCC/GND pinning for noise reduction, and compatibility with 5-V TTL logic families.
Technical Context
The SN74ABT16245ADL implements dual 8-bit transceiver sections with independent direction (DIR) and output-enable (OE) controls per section, enabling flexible synchronous two-way communication. Its EPIC-IIB™ BiCMOS process delivers low ground bounce (<1 V VOLP) and latch-up immunity exceeding 500 mA.
It features flow-through pin architecture-A-side inputs/outputs on one side, B-side on the opposite-with dedicated GND/VCC pairs adjacent to signal groups to minimize switching noise. The device enters high-impedance state when VCC is below 2.1 V or OE is high, and supports isolation via OE assertion regardless of DIR state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial 5-V rail tolerances. |
| Propagation Delay (tPLH) | 1 ns min / 3.9 ns typ / 4 ns max - Enables reliable timing in 100+ MHz bus systems with 50-pF load. |
| Output Drive (IOL) | 64 mA - Drives heavy capacitive loads or multiple TTL inputs without external buffers. |
| Output Drive (IOH) | –32 mA - Sinks sufficient current for active pull-down in mixed-signal bus termination. |
| VOL (at 64 mA) | 0.55 V max - Guarantees solid low-level logic margin under full drive conditions. |
| VOH (at –32 mA) | 2 V min - Maintains TTL-compatible high-level output even at maximum sink current. |
| Input Hysteresis | 100 mV - Rejects noise on DIR/OE control lines in electrically noisy environments. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial ambient conditions. |
Pinout & Package
SN74ABT16245ADL uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm pitch, 12.6 mm × 6.1 mm body, and 1.2-mm max height. Pin 1 is located at top-left corner with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per 8-bit section: low = B→A, high = A→B. |
| 1OE, 2OE | Output enable input | Active-low; drives all outputs into high-impedance state when high. |
| 1A1–1A8, 2A1–2A8 | A-bus data I/O | Noninverting inputs/outputs for first and second 8-bit A-side channels. |
| 1B1–1B8, 2B1–2B8 | B-bus data I/O | Noninverting inputs/outputs for first and second 8-bit B-side channels. |
| VCC (pins 7, 18, 29, 40) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN stability. |
| GND (pins 4, 10, 15, 21, 27, 33, 39, 45) | Ground reference | Eight GND pins symmetrically placed to support low-inductance return paths. |
Key Features
| Feature | Design Value |
|---|---|
| High-drive 3-state outputs | –32 mA IOH / 64 mA IOL enables direct interfacing with legacy TTL loads without level-shifting. |
| Distributed VCC/GND pinning | Four VCC and eight GND pins minimize ground bounce and supply rail collapse during fast switching. |
| Flow-through pin architecture | A- and B-side signals are physically separated on opposing sides, simplifying PCB trace routing and reducing crosstalk. |
| Power-up/power-down high-Z | Automatically enters high-impedance state when VCC < 2.1 V, preventing bus contention during sequencing. |
| EPIC-IIB™ BiCMOS process | Combines bipolar speed and CMOS low static power, achieving <1 V output ground bounce at 5 V. |
| Latch-up immunity | Exceeds 500 mA per JESD70 - ensures robustness against transient-induced parasitic thyristor activation. |
Applications
| Industrial Backplane Interface | Memory Subsystem Data Bus |
|---|---|
Use Scenario: Bidirectional data transfer between CPU module and peripheral cards in modular PLC chassis with shared 16-bit parallel bus. IC Role / Device Role / Timing Role: Level-shifting, bus isolation, and drive-strengthening transceiver managing A↔B data flow under centralized DIR/OE control. Use Value: Eliminates need for discrete buffer arrays; 64-mA IOL drives 15-cm backplane traces with 30-pF/m capacitance while maintaining <0.8-V VOL margin. | Use Scenario: Interfacing microcontroller data bus to SRAM/Flash memory array with separate address/data multiplexing requirements. IC Role / Device Role / Timing Role: Direction-controlled transceiver enabling time-multiplexed read/write cycles on shared 16-bit data path. Use Value: 3.9-ns tPLH supports 100-MHz burst transfers; high-Z state during OE deassertion prevents memory bus contention during refresh cycles. |
| Legacy System Bus Extender | Test Equipment Signal Routing |
Use Scenario: Extending 5-V TTL data bus across daughterboard connectors in aging instrumentation platforms requiring backward compatibility. IC Role / Device Role / Timing Role: Noninverting 3-state repeater isolating source and load segments while preserving signal integrity and timing. Use Value: 0.55-V VOL at full 64-mA drive ensures >0.7-V noise margin over 20-cm ribbon cable runs with 100-Ω characteristic impedance. | Use Scenario: Configurable signal path routing in automated test equipment where DUT I/O lines must be dynamically connected to stimulus or measurement resources. IC Role / Device Role / Timing Role: Programmable bidirectional switch controlled by FPGA GPIOs to establish A↔B signal paths on demand. Use Value: Independent DIR/OE per 8-bit section allows concurrent routing of two independent 8-bit test vectors without cross-talk or timing skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16245ADGVR | TVSOP-48 package (4.4 mm × 6.1 mm); same electrical specs; 0.4-mm pitch. | Higher board density; requires finer-pitch reflow profile; not drop-in compatible with DL footprint. | Select for space-constrained designs where 32% smaller area justifies tighter assembly tolerance. |
| SN74ABT16245ADGGR | TSSOP-48 package (6.1 mm × 12.5 mm); same electrical specs; 0.5-mm pitch; 1.2-mm max height. | Lower profile than DL; identical pitch but longer body; thermal resistance θJA = 89°C/W vs DL's 94°C/W. | Prefer for thermally sensitive layouts needing marginally better power dissipation and standard 0.5-mm placement tooling. |
Compared with SN74ABT16245ADGVR and SN74ABT16245ADGGR, the SN74ABT16245ADL offers the largest body (12.6 mm × 6.1 mm) and highest θJA (94°C/W), but provides the most relaxed hand-soldering and rework accessibility among the three SSOP/TSSOP/TVSOP variants while retaining identical logic behavior and drive strength.
Availability
SN74ABT16245ADL is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem data buses, legacy system bus extenders, and test equipment signal routing requiring stable component supply and long-term manufacturability.
Supply support for SN74ABT16245ADL 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 50 years of innovation in high-performance digital interfaces.
The SN74ABT16245ADL belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-immune, high-speed 5-V TTL-compatible data transfer in industrial and communications infrastructure systems.
FAQ
What is the recommended power-up sequence for SN74ABT16245ADL to avoid bus contention?
The SN74ABT16245ADL automatically enters high-impedance state when VCC is below 2.1 V, eliminating need for strict power sequencing. However, to guarantee isolation above 2.1 V, tie OE pins to VCC through a pullup resistor - minimum value determined by driver's current-sinking capability. This ensures the SN74ABT16245ADL remains disabled until system control logic asserts valid DIR/OE states.
Can SN74ABT16245ADL operate reliably with a 5.5-V supply and 64-mA output load?
Yes. The SN74ABT16245ADL is fully characterized for VCC = 4.5 V to 5.5 V and IOL = 64 mA per output. At 5.5 V and 64 mA, VOL remains ≤0.55 V (per datasheet Table 4), ensuring >0.95-V noise margin versus TTL VIH = 2.0 V. Thermal performance is validated with θJA = 94°C/W in DL package, supporting continuous operation within industrial temperature limits.
Does SN74ABT16245ADL support hot-swap or live-insertion applications?
The SN74ABT16245ADL provides partial hot-swap support via its power-up/power-down high-Z feature: outputs enter high-impedance when VCC drops below 2.1 V. However, it lacks dedicated hot-swap controllers or slew-rate limiting. For true live-insertion, external current-limiting and sequencing circuitry is required. The SN74ABT16245ADL itself will not latch up or sustain damage during controlled insertion if VCC ramps within 200 µs/V (per datasheet).
How does the distributed VCC/GND pin configuration in SN74ABT16245ADL reduce switching noise?
The SN74ABT16245ADL places four VCC and eight GND pins strategically across the 48-pin DL package - adjacent to signal groups and alternating along both long edges. This minimizes current loop area for each switching output, reduces simultaneous switching output (SSO) noise, and lowers effective PDN inductance. Measured VOLP is <1 V at 5 V/25°C, directly attributable to this layout, enabling cleaner signal integrity in dense backplane designs.
Is SN74ABT16245ADL pin-compatible with older SN74ABT16245A variants in DL package?
Yes. The SN74ABT16245ADL is the production-orderable version of the SN74ABT16245A in DL package, sharing identical pinout, electrical specifications, and mechanical dimensions per TI's SCBS300G datasheet and packaging addendum. Marking "ABT16245A" on the device body confirms functional and physical equivalence with legacy SN74ABT16245A-DL units.
SN74ABT16245ADL 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:
- 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
SN74ABT16245ADL FAQ
1.How can I place an order for SN74ABT16245ADL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16245ADL 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 SN74ABT16245ADL reliable?
The price and inventory of SN74ABT16245ADL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16245ADL is usually 5 days.
3.What payment methods are accepted for SN74ABT16245ADL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16245ADL transactions.
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4.How is shipping managed for SN74ABT16245ADL?
SN74ABT16245ADL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16245ADL 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 SN74ABT16245ADL?
For technical support, including SN74ABT16245ADL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16245ADL requirements.
6.How does Aetrix verify that SN74ABT16245ADL is sourced from the original manufacturer or authorized distributors?
All SN74ABT16245ADL 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 SN74ABT16245ADL meets industry standards.
7.What is the process for return or replacement of SN74ABT16245ADL?
All SN74ABT16245ADL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16245ADL, 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 SN74ABT16245ADL part is unused and in its original packaging.
Return procedure for SN74ABT16245ADL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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