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Texas Instruments SN74ABT16623DLG4
- Part No.:
- SN74ABT16623DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16623DLG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,689
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Product details
Overview
SN74ABT16623DLG4 from Texas Instruments is a 16-bit bus transceiver with 3-state outputs in a 48-pin SSOP (DL) package, operating from 4.5 V to 5.5 V over –40°C to 85°C. It supports bidirectional data flow between A and B buses with dual output-enable controls (OEAB/OEBA), delivers ±32 mA/±64 mA drive strength, and features distributed VCC/GND pins to suppress high-speed switching noise for use in industrial backplane and board-level interconnect applications.
For engineers reviewing the SN74ABT16623DLG4 datasheet, SN74ABT16623DLG4 pinout, SN74ABT16623DLG4 application, or SN74ABT16623DLG4 equivalent, this page provides verified functional identity, confirmed pin mapping, real-world timing parameters (tPLH ≤ 3.6 ns, tPZL ≤ 6 ns), thermal resistance (θJA = 94°C/W), and two validated alternative parts for system-level design continuity.
Technical Context
The SN74ABT16623DLG4 implements a flow-through architecture with separate OEAB and OEBA inputs per 8-bit section, enabling independent control of A→B and B→A data paths or simultaneous bidirectional 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.
Each of its 32 I/Os operates as a true bus interface with high-drive capability (–32 mA IOH, 64 mA IOL), while distributed power/ground pins and 50 pF load-optimized switching characteristics (tPHL ≤ 4.3 ns, tPHZ ≤ 6 ns) support reliable operation in dense PCB layouts with minimal signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic systems without level-shifting. |
| IOH/IOL | –32 mA / 64 mA - Drives heavy capacitive loads (e.g., long traces, multiple inputs) without signal degradation. |
| tPLH/tPHL | 1 ns to 3.6 ns - Enables sub-4 ns propagation delay for high-speed synchronous bus handshaking. |
| tPZL/tPHZ | 1.4 ns to 6 ns - Guarantees fast 3-state enable/disable transitions to prevent bus contention during state changes. |
| θJA | 94°C/W - Matches thermal performance of standard DL-package logic devices for predictable board-level thermal design. |
| VOLP | < 1 V at VCC = 5 V - Limits ground bounce-induced noise coupling into adjacent signals on shared PCB planes. |
| Operating Temp | –40°C to 85°C - Qualified for industrial-grade embedded systems including programmable logic controllers and test equipment. |
Pinout & Package
SN74ABT16623DLG4 uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch and 300-mil body width. Pin 1 is located at top-left corner (Q1 quadrant) in tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB | A→B Output Enable (active-low) | Disables A-port drivers to isolate A bus; asserted low enables A→B data transfer. |
| 1OEBA, 2OEBA | B→A Output Enable (active-low) | Disables B-port drivers to isolate B bus; asserted low enables B→A data transfer. |
| 1A1–1A8, 2A1–2A8 | A-side bidirectional data I/Os | Connect to source bus; direction determined by OEAB/OEBA states and internal transceiver logic. |
| 1B1–1B8, 2B1–2B8 | B-side bidirectional data I/Os | Connect to destination bus; mirror A-side behavior with independent enable control per 8-bit group. |
| VCC (Pins 7, 18, 28, 39) | Power supply | Distributed VCC pins reduce IR drop and supply noise across the 16-bit data path. |
| GND (Pins 4, 10, 15, 21, 25, 31, 34, 42) | Ground reference | Eight GND pins minimize ground bounce and provide low-inductance return paths for all I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input and output pins arranged to minimize trace length and layer transitions on PCBs-reduces skew and EMI. |
| Dual 8-bit enable control | Independent OEAB/OEBA per half allows split-bus operation, isolated data latching, or full 16-bit mode without external logic. |
| High-drive 3-state outputs | –32 mA IOH/64 mA IOL drives up to 10 LSTTL loads or 20 pF + 10 cm trace capacitance reliably. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power-typical ICC = 2 mA in disabled state, 35 mA max under full load. |
| Latch-up immunity | Exceeds 500 mA per JESD-17-ensures robustness against transient overcurrent events in noisy industrial environments. |
Applications
| Industrial Backplane Interconnect | Programmable Logic Controller (PLC) I/O Expansion |
|---|---|
|
Use Scenario: Bidirectional data routing between CPU module and modular I/O carrier boards in DIN-rail mounted PLC chassis. IC Role / Device Role / Timing Role: Bus transceiver managing asynchronous parallel communication between processor and field I/O ASICs with configurable direction control. Use Value: Dual OE inputs allow independent gating of 8-bit segments to support mixed analog/digital I/O modules without bus contention. |
Use Scenario: Isolating and extending 16-bit parallel data paths between main controller and remote sensor/actuator interface cards. IC Role / Device Role / Timing Role: Level-shifting and drive-boosting transceiver enabling clean signal transmission across 15-cm backplane traces at 25 MHz. Use Value: 94°C/W θJA and distributed VCC/GND pins maintain signal integrity under sustained 64 mA per output switching loads. |
| Test Equipment Data Acquisition Interface | Legacy System Bus Bridge |
|
Use Scenario: Connecting high-speed ADC/DAC FPGA fabric to external memory-mapped instrumentation bus with precise timing control. IC Role / Device Role / Timing Role: Synchronous bus interface providing sub-4 ns tPLH and controlled 3-state disable (tPZL ≤ 6 ns) for glitch-free sampling windows. Use Value: Low VOLP < 1 V prevents ground bounce from corrupting adjacent analog measurement channels on shared PCB ground plane. |
Use Scenario: Bridging legacy 5-V parallel buses (e.g., ISA, VME) to modern microcontroller peripherals requiring isolation and drive enhancement. IC Role / Device Role / Timing Role: Protocol-transparent transceiver enabling direct connection between mismatched bus timing domains using OE-driven handshaking. Use Value: True data output behavior and flow-through layout eliminate need for external inverters or delay compensation in retrofit designs. |
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 |
|---|---|---|---|
| SN74ABT162245DLR | Non-inverting 16-bit transceiver with single-direction control (DIR pin); no dual-OE latching mode. | Requires external logic for bidirectional latching; better suited for unidirectional data highways than split-bus arbitration. | Select when system uses centralized direction control and prioritizes pin count reduction over per-segment enable flexibility. |
| SN74LVC16245ADGGR | 3.3-V only operation (1.65–3.6 V); lower drive (–24 mA/24 mA); 32-pin TSSOP package. | Not compatible with 5-V buses; requires level translation if interfacing with legacy 5-V logic or peripherals. | Select for new 3.3-V designs where power efficiency and smaller footprint outweigh 5-V interoperability needs. |
Compared with SN74ABT16623DLG4, SN74ABT162245DLR offers simpler direction control but lacks independent 8-bit latching, while SN74LVC16245ADGGR reduces voltage and size at the cost of 5-V compatibility and drive strength-making SN74ABT16623DLG4 optimal for industrial 5-V bus isolation with timing-critical enable sequencing.
Availability
SN74ABT16623DLG4 is available at Aetrix Electronics and suitable for industrial backplane interconnect, programmable logic controller (PLC) I/O expansion, and test equipment data acquisition interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABT16623DLG4 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 automotive components.
The SN74ABT16623DLG4 belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for robust, low-noise bidirectional data transfer in industrial control, instrumentation, and legacy-system upgrade applications.
FAQ
What is the operating temperature range for SN74ABT16623DLG4?
The SN74ABT16623DLG4 is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is explicitly specified in the official Texas Instruments datasheet SCBS211B and confirmed across all DL-package variants including SN74ABT16623DLG4. It does not support the extended –55°C to +125°C military range offered by the SN54ABT16623 variant in WD packaging.
Does SN74ABT16623DLG4 support true bidirectional data flow without external logic?
Yes, SN74ABT16623DLG4 supports true bidirectional data flow through its dual active-low output-enable inputs: OEAB controls A→B transmission, and OEBA controls B→A transmission. When both are asserted low, the device enters bidirectional latching mode-allowing simultaneous A→B and B→A data transfer without additional gates or direction-control circuitry.
What package type and pin count does SN74ABT16623DLG4 use?
SN74ABT16623DLG4 uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch and 300-mil body width. This matches the DL package designation in TI's official packaging addendum and is distinct from the DGG (thin shrink) or WD (ceramic flat) variants used by other members of the ABT16623 family.
How does SN74ABT16623DLG4 handle power-up and power-down isolation?
To ensure high-impedance outputs during power sequencing, SN74ABT16623DLG4 requires OEBA to be tied to VCC via a pullup resistor and OEAB to GND via a pulldown resistor. The minimum resistor values depend on driver current-sourcing/sinking capability-TI specifies these as design-critical for preventing bus contention during brown-out or hot-insertion events.
What is the maximum output current rating for SN74ABT16623DLG4?
SN74ABT16623DLG4 supports a maximum low-level output current (IOL) of 64 mA and high-level output current (IOH) of –32 mA per pin, as verified in the "Recommended Operating Conditions" and "Electrical Characteristics" tables of the SCBS211B datasheet. These ratings apply across the full operating temperature range and define its ability to drive heavy capacitive or fanout loads.
SN74ABT16623DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 48-SSOP
SN74ABT16623DLG4 FAQ
1.How can I place an order for SN74ABT16623DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16623DLG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74ABT16623DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16623DLG4 is usually 5 days.
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Once your SN74ABT16623DLG4 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 SN74ABT16623DLG4?
For technical support, including SN74ABT16623DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16623DLG4 requirements.
6.How does Aetrix verify that SN74ABT16623DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT16623DLG4 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 SN74ABT16623DLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT16623DLG4?
All SN74ABT16623DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16623DLG4, 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 SN74ABT16623DLG4 part is unused and in its original packaging.
Return procedure for SN74ABT16623DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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