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Texas Instruments SN74ABT16470DLR
- Part No.:
- SN74ABT16470DLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16470DLR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
SN74ABT16470DLR from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for high-speed bidirectional data buffering in bus-hold or hot-swap applications. It features dual 8-bit registers (A↔B), independent clock (CLKAB/CLKBA) and output-enable (OEAB/OEBA) controls, ±32-mA high-drive outputs, and operation over –40°C to 85°C at 4.5–5.5 V.
For engineers reviewing the SN74ABT16470DLR datasheet, SN74ABT16470DLR pinout, SN74ABT16470DLR application, or SN74ABT16470DLR equivalent, key selection criteria include registered flow-through timing (tPLH/tPHL ≤ 4.9 ns), latch-up immunity (>500 mA), distributed VCC/GND layout support, and compatibility with 5-V TTL/CMOS systems requiring robust noise margin and ground-bounce control (VOLP < 1 V).
Technical Context
The SN74ABT16470DLR implements two independent 8-bit D-type flip-flop banks-one for A-to-B and one for B-to-A data flow-each with dedicated clock enable (CLKENAB/CLKENBA), clock (CLKAB/CLKBA), and output-enable (OEAB/OEBA) inputs. Its EPIC-IIB BiCMOS process enables low power dissipation while sustaining high drive strength.
It supports flow-through architecture with distributed VCC and GND pins to suppress high-speed switching noise, and requires OE tied to VCC via pullup during power-up/down to guarantee high-impedance state. Clock enable must not transition low while clock is high to prevent false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL logic rails and stable operation across industrial voltage tolerances. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems and communications backplanes. |
| Output Drive | –32 mA IOH / +64 mA IOL - Supports heavy capacitive loads and fanout to multiple TTL inputs without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 4.9 ns @ VCC = 5 V, CL = 50 pF - Enables reliable 150-MHz clock operation in synchronous bus interfaces. |
| Ground Bounce (VOLP) | < 1 V @ VCC = 5 V, TA = 25°C - Minimizes signal integrity risk in dense PCB layouts with simultaneous switching outputs. |
| Latch-Up Immunity | > 500 mA per JEDEC JESD-17 - Provides robust fault tolerance against transient current surges in shared-bus environments. |
| Input Capacitance | Ci = 3 pF (control), Cio = 8.5 pF (I/O) - Reduces loading on upstream drivers and preserves signal edge rates in high-frequency routing. |
Pinout & Package
SN74ABT16470DLR is packaged in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.5-mm lead pitch, 1.2-mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Individually disables 8-bit A→B or B→A output banks into high-impedance state; critical for bus arbitration and hot-swap isolation. |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register clock input (rising-edge) | Controls synchronous latching of data from A to B or B to A; separate clocks allow asymmetric timing control per direction. |
| 1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA | Clock enable (active-high) | Gates clock propagation to respective register bank; prevents unintended latching when CLK is active but data is unstable. |
| 1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8 | Bi-directional data I/O ports | Two sets of 8-bit parallel I/O channels; each port pair (e.g., 1A1 ↔ 1B1) forms a registered transceiver path with internal D-flip-flop storage. |
| VCC, GND (12× each) | Distributed power/ground | Multiple VCC/GND pins interleaved across package reduce simultaneous switching noise and improve PDN impedance for clean signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input-to-output signal path aligns physically across package (e.g., A1→B1 adjacent), minimizing trace length and skew in PCB layout. |
| High-drive 3-state outputs | –32 mA IOH / +64 mA IOL ensures direct interface with legacy TTL loads and eliminates need for external line drivers in mid-density buses. |
| Dual independent register banks | Enables asynchronous A↔B data transfer-e.g., A-side latches at 10 MHz while B-side updates at 25 MHz-without internal contention. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS density to achieve 150-MHz max clock frequency with sub-5-ns propagation delay and low static current (ICC ≤ 2 mA disabled). |
| Robust ESD and latch-up protection | Exceeds JEDEC JESD-17 latch-up rating (>500 mA) and supports >2-kV HBM ESD-critical for manufacturing handling and field-replaceable modules. |
Applications
| Backplane Data Buffering | Hot-Swappable Module Interface |
|---|---|
|
Use Scenario: Bidirectional data transfer between CPU and peripheral cards in a 16-bit VMEbus or custom industrial backplane. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune data capture and forwarding with independent A/B clock domains. Use Value: Eliminates metastability risk via D-flip-flop registration and maintains signal integrity with distributed VCC/GND and <1-V ground bounce. |
Use Scenario: Isolating a newly inserted module's data bus from the live backplane during hot insertion. IC Role / Device Role / Timing Role: 3-state output control enables safe bus connection/disconnection; OE-driven high-Z state prevents bus contention during power ramp-up. Use Value: Pullup-tied OE guarantees fail-safe high-impedance at power-on, avoiding short-circuits or data corruption during hot-swap sequencing. |
| Memory Expansion Interface | Legacy Bus Bridge (ISA/EISA) |
|
Use Scenario: Extending address/data bus width between microcontroller and external SRAM or Flash memory array. IC Role / Device Role / Timing Role: Registered latching synchronizes burst-mode memory reads/writes to system clock, decoupling timing between controller and slower memory. Use Value: tSU = 4 ns and tH = 1 ns setup/hold margins ensure reliable sampling at 100+ MHz bus speeds without added wait states. |
Use Scenario: Interfacing modern FPGA-based controllers to legacy ISA or EISA expansion slots requiring 5-V tolerant, high-drive signaling. IC Role / Device Role / Timing Role: Level-shifting and drive-boosting transceiver that meets TTL voltage thresholds while sourcing/sinking >60 mA per line. Use Value: –32 mA IOH / +64 mA IOL directly drives ISA bus loads without external buffers, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162245DLR | Non-registered 16-bit transceiver; no internal flip-flops; lower drive (–24 mA / +24 mA); 48-pin SSOP. | Suitable only for combinatorial bus driving-not for synchronous data capture or clock-domain crossing. | Select when timing transparency is required and external clocking is handled by FPGA/controller logic. |
| SN74LVC16T245DGGR | 3.3-V only (1.65–3.6 V), level-shifting, registered variant not available; 56-pin TSSOP; ±24 mA drive. | Designed for mixed-voltage 3.3-V/5-V interfacing, not native 5-V bus extension; lacks latch-up immunity >500 mA. | Choose for low-voltage systems needing voltage translation; avoid in industrial 5-V backplanes requiring robustness. |
Compared with SN74ABT162245DLR and SN74LVC16T245DGGR, the SN74ABT16470DLR uniquely delivers registered 16-bit bidirectional buffering at full 5-V operation with industry-leading noise suppression and latch-up resilience-making it irreplaceable in synchronous, high-noise, hot-swap-capable industrial bus architectures.
Availability
SN74ABT16470DLR is available at Aetrix Electronics and suitable for industrial backplane buffering, hot-swap module interfaces, memory expansion subsystems, and legacy bus bridge designs requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT16470DLR 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 heritage in high-reliability industrial and aerospace components.
The SN74ABT16470DLR belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, registered data transfer in demanding 5-V industrial and communications infrastructure applications.
FAQ
What is the maximum clock frequency supported by the SN74ABT16470DLR?
The SN74ABT16470DLR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This is validated by timing parameters including tw ≥ 3.3 ns (minimum pulse width) and fclock ≤ 150 MHz in the datasheet. Real-world operation at this rate requires controlled impedance routing and proper decoupling due to its high-speed BiCMOS design.
Does the SN74ABT16470DLR require external pull-up resistors on OE pins?
Yes - to ensure a defined high-impedance state during power-up or power-down, OEAB and OEBA pins must be tied to VCC through an external pull-up resistor. The minimum resistance value depends on the current-sinking capability of the driving source; TI recommends verifying against the device's II input leakage (±1 µA typical) and system-level noise margin requirements.
Can the SN74ABT16470DLR be used as two independent 8-bit transceivers?
Yes - the SN74ABT16470DLR contains two fully independent 8-bit registered transceiver banks (1A↔1B and 2A↔2B), each with dedicated CLKAB/CLKBA, CLKENAB/CLKENBA, and OEAB/OEBA controls. This allows concurrent, asynchronous data transfers in both directions without internal resource conflict or timing coupling.
What is the thermal performance of the SN74ABT16470DLR in the DL package?
The SN74ABT16470DLR in the DL (SSOP) package has a junction-to-ambient thermal resistance (θJA) of 74°C/W, measured per JEDEC Std JESD51. This value assumes standard 2-layer PCB layout with adequate copper pour; actual thermal performance improves significantly with internal ground/power planes and thermal vias beneath exposed pad areas (if applicable).
Is the SN74ABT16470DLR compatible with 3.3-V logic inputs?
No - the SN74ABT16470DLR is a 5-V-only device with VIH = 2.0 V (min) and VIL = 0.8 V (max), specified for 4.5–5.5 V operation. While 3.3-V CMOS outputs may meet the VIL threshold, they risk marginal noise margin and are not guaranteed across temperature/voltage extremes. A level-shifter or 5-V-compatible driver is required for reliable interfacing.
SN74ABT16470DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 56-SSOP
SN74ABT16470DLR FAQ
1.How can I place an order for SN74ABT16470DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16470DLR 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 SN74ABT16470DLR reliable?
The price and inventory of SN74ABT16470DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16470DLR is usually 5 days.
3.What payment methods are accepted for SN74ABT16470DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16470DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT16470DLR?
SN74ABT16470DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16470DLR 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 SN74ABT16470DLR?
For technical support, including SN74ABT16470DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16470DLR requirements.
6.How does Aetrix verify that SN74ABT16470DLR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16470DLR 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 SN74ABT16470DLR meets industry standards.
7.What is the process for return or replacement of SN74ABT16470DLR?
All SN74ABT16470DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16470DLR, 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 SN74ABT16470DLR part is unused and in its original packaging.
Return procedure for SN74ABT16470DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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