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Texas Instruments SN74ABT16623DLR
- Part No.:
- SN74ABT16623DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16623DLR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,908
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Product details
Overview
SN74ABT16623DLR from Texas Instruments is a 16-bit dual-bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in high-speed digital systems. It supports true data flow (non-inverting), operates at 4.5–5.5 V, delivers ±32-mA/±64-mA output drive, and is rated for –40°C to 85°C industrial temperature range.
For engineers reviewing the SN74ABT16623DLR datasheet, SN74ABT16623DLR pinout, SN74ABT16623DLR application, or SN74ABT16623DLR equivalent, key selection criteria include its dual-enable control logic (OEAB/OEBA), flow-through architecture for PCB layout optimization, distributed VCC/GND pins for noise reduction, and high-drive capability suitable for bus loading in legacy TTL- and CMOS-compatible systems.
Technical Context
The SN74ABT16623DLR implements a dual 8-bit transceiver architecture with independent OEAB (A-to-B enable) and OEBA (B-to-A enable) controls, enabling flexible bus direction management including simultaneous bidirectional data latching when both enables are active. Its EPIC-IIB BiCMOS process delivers low ground bounce (VOLP < 1 V) and latch-up immunity exceeding 500 mA per JESD-17.
It features distributed power/ground pinning across the 48-pin SSOP (DL) package to minimize high-speed switching noise, and a flow-through pinout that aligns inputs and outputs on opposite sides of the package-reducing trace crossovers and improving signal integrity in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL and mixed-voltage logic systems without level-shifting. |
| Output Drive | –32 mA IOH, +64 mA IOL - Drives heavy capacitive loads and multiple TTL inputs directly, reducing need for external buffers. |
| Propagation Delay | 1 ns to 3.7 ns (tPLH/tPHL) - Supports >200-MHz bus operation in short-trace, low-capacitance environments. |
| Enable Timing | tPZL = 1.4–6.2 ns, tPHZ = 1–6 ns - Enables fast bus arbitration and dynamic isolation during hot-swap or power sequencing. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded control, instrumentation, and communications equipment. |
| Input Clamp Current | –18 mA - Protects against transient overvoltage on control inputs without external diodes. |
| Thermal Resistance | θJA = 94°C/W (DL package) - Defines maximum power dissipation limit under natural convection for thermal design. |
Pinout & Package
SN74ABT16623DLR is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.5-mm lead pitch and RoHS-compliant NiPdAu finish. The package is moisture-sensitive Level-1 (260°C peak reflow, unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB | A-to-B Output Enable (active-low) | Controls direction from A bus to B bus; low enables A→B data flow, high places B outputs in high-Z. |
| 1OEBA, 2OEBA | B-to-A Output Enable (active-low) | Controls direction from B bus to A bus; low enables B→A data flow, high places A outputs in high-Z. |
| 1A1–1A8, 2A1–2A8 | Port A Data Inputs/Outputs | First and second 8-bit A-side bidirectional I/O terminals; driven by B-side data when OEBA low, drive B-side when OEAB low. |
| 1B1–1B8, 2B1–2B8 | Port B Data Inputs/Outputs | First and second 8-bit B-side bidirectional I/O terminals; driven by A-side data when OEAB low, drive A-side when OEBA low. |
| VCC (Pins 7, 18, 28, 39) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN impedance across the die. |
| GND (Pins 4, 10, 15, 21, 25, 31, 34, 42) | Ground Reference | Eight dedicated GND pins provide low-inductance return paths and support clean signal integrity in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins placed on opposite package edges-enables straight-layer PCB routing, minimizes vias and stubs. |
| Dual independent enable logic | OEAB and OEBA allow four distinct operational modes: A→B, B→A, isolation, and bidirectional latching-no external glue logic required. |
| High-drive 3-state outputs | –32 mA / +64 mA drive strength sustains signal integrity across long traces or multi-drop buses without repeaters. |
| Low ground bounce (VOLP) | < 1 V at VCC = 5 V - Reduces noise coupling into analog sections and improves timing margin in mixed-signal systems. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS density-delivers high speed with lower static power vs. pure bipolar designs. |
Applications
| Industrial Backplane Interfacing | Legacy System Bus Expansion |
|---|---|
|
Use Scenario: Connecting microcontroller local bus to a 16-bit ISA-style backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing address/data multiplexing and direction control via discrete OE signals. Use Value: High drive strength ensures reliable signal integrity across 150-mm backplane traces; flow-through pinout simplifies layer stackup in 4-layer control board. |
Use Scenario: Adding peripheral memory or I/O expansion to an aging 5-V embedded system using parallel bus protocol. IC Role / Device Role / Timing Role: Isolating and translating between CPU data bus and add-on card bus with independent direction control. Use Value: Dual OE inputs allow precise timing of bus handshaking; 3-state outputs prevent contention during reset or sleep states. |
| Test Equipment Data Path Switching | Automated Test Fixture Interface |
|
Use Scenario: Routing DUT data between multiple instrument channels in automated test equipment with shared bus resources. IC Role / Device Role / Timing Role: Configurable 16-bit data switch enabling dynamic reconfiguration of measurement paths without FPGA intervention. Use Value: Sub-4-ns propagation delay supports real-time path switching at >100 MHz; latch mode holds state during channel reconfiguration. |
Use Scenario: Interfacing boundary-scan controller to device-under-test pins in production test fixtures requiring robust drive. IC Role / Device Role / Timing Role: Level-translating and driving JTAG or custom parallel test bus with high-current capability. Use Value: ±64-mA IOL drives long fixture cables and multiple DUT inputs simultaneously; industrial temp rating ensures reliability in factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVT16623DLR | Lower VCC range (2.7–3.6 V), 3.3-V only; 32-mA/64-mA drive; faster tPLH (1.8 ns typ) | Designed for 3.3-V LVTTL systems; not 5-V tolerant; requires level-shifting when interfacing with legacy 5-V buses. | Select when migrating to 3.3-V infrastructure and full 5-V compatibility is unnecessary. |
| SN74ALVC164245DLR | Direction-controlled (DIR pin), dual-supply (VCCA/VCCB), 24-mA/24-mA drive, 1.65–3.6 V per rail | Supports voltage translation (e.g., 3.3 V ↔ 1.8 V); lacks dual-OE latching mode; lower drive limits use in high-load scenarios. | Choose for mixed-voltage domain bridging where voltage translation-not high drive-is the primary requirement. |
Compared with SN74LVT16623DLR and SN74ALVC164245DLR, the SN74ABT16623DLR uniquely combines 5-V tolerance, dual-OE latching, and highest output drive in a single 48-pin SSOP package-making it the only option for robust 5-V bus isolation and expansion without redesigning power or interface logic.
Availability
SN74ABT16623DLR is available at Aetrix Electronics and suitable for industrial backplane interfacing, legacy system bus expansion, test equipment data path switching, automated test fixture interface, and embedded control subsystems requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT16623DLR 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 logic families and industrial-grade components.
The SN74ABT16623DLR belongs to TI's Widebus™ ABT logic family-designed specifically for high-speed, high-drive, 5-V bus interfacing in industrial, telecom, and computing infrastructure where signal integrity and bus loading resilience are critical.
FAQ
What is the operating voltage range for SN74ABT16623DLR?
The SN74ABT16623DLR operates over a supply voltage range of 4.5 V to 5.5 V. This 5-V nominal range ensures full compatibility with legacy TTL and CMOS systems, and supports stable operation even under moderate rail droop. It is not rated for 3.3-V or mixed-voltage operation-using it outside this range may cause functional failure or damage.
Does SN74ABT16623DLR support bidirectional data latching?
Yes, the SN74ABT16623DLR supports true bidirectional latching: when both OEAB and OEBA are asserted low, data flows in both directions and each port reinforces its own input-effectively storing the last valid state on both A and B buses. This mode requires all other drivers on both buses to be in high-impedance state to avoid contention.
What package type and dimensions does SN74ABT16623DLR use?
SN74ABT16623DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 300-mil body width, 0.5-mm lead pitch, and 1.2-mm max height. Its tape-and-reel packaging (1000 units per reel) complies with JEDEC standard MO-153, and the part marking "ABT16623" appears on the top surface.
How does SN74ABT16623DLR handle power-up and power-down sequencing?
To ensure high-impedance outputs during power transitions, OEBA must be tied to VCC via a pullup resistor and OEAB to GND via a pulldown resistor. Minimum resistor values depend on driver current capability-TI recommends ≥10-kΩ for typical conditions. This prevents bus contention before logic initialization completes.
Is SN74ABT16623DLR pin-compatible with other 16-bit transceivers in TI's portfolio?
No-SN74ABT16623DLR has a unique 48-pin DL package pinout optimized for flow-through routing and distributed power/ground. It is not pin-compatible with SN74LVT16623DLR or SN74ALVC164245DLR, which use different pin assignments for enables, VCC, and I/O groups. PCB layout must be designed specifically for SN74ABT16623DLR.
SN74ABT16623DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SN74ABT16623DLR FAQ
1.How can I place an order for SN74ABT16623DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16623DLR 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 SN74ABT16623DLR reliable?
The price and inventory of SN74ABT16623DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16623DLR is usually 5 days.
3.What payment methods are accepted for SN74ABT16623DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16623DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT16623DLR?
SN74ABT16623DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16623DLR 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 SN74ABT16623DLR?
For technical support, including SN74ABT16623DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16623DLR requirements.
6.How does Aetrix verify that SN74ABT16623DLR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16623DLR 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 SN74ABT16623DLR meets industry standards.
7.What is the process for return or replacement of SN74ABT16623DLR?
All SN74ABT16623DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16623DLR, 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 SN74ABT16623DLR part is unused and in its original packaging.
Return procedure for SN74ABT16623DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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