My Inquiry
My Account
Texas Instruments SN74ABT16623DL
- Part No.:
- SN74ABT16623DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16623DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,851
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT16623DL 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 independent OEAB/OEBA controls, delivers ±32 mA/±64 mA output drive, and features low ground bounce (<1 V VOLP) for high-speed digital systems such as backplane interconnects and memory expansion modules.
For engineers reviewing the SN74ABT16623DL datasheet, SN74ABT16623DL pinout, SN74ABT16623DL application, or SN74ABT16623DL equivalent, this page provides verified electrical specs, true bidirectional timing behavior (tPLH/tPHL ≤ 3.6 ns), thermal resistance (θJA = 94°C/W), latch-up immunity (>500 mA), and dual-enable data hold capability - all critical for synchronous bus arbitration and hot-swap isolation design.
Technical Context
The SN74ABT16623DL implements a dual 8-bit or unified 16-bit transceiver architecture with separate OEAB (A-to-B enable) and OEBA (B-to-A enable) inputs, enabling flexible bus direction control and simultaneous bidirectional operation when both enables are active. Its EPIC-IIB BiCMOS process ensures low power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and rail-to-rail output swing.
Each of its 32 I/O pins operates with high-drive capability (–32 mA IOH, 64 mA IOL), distributed VCC/GND pinning to suppress switching noise, and flow-through pinout for optimized PCB layout. The device enters high-impedance state on power-up when OEBA is pulled up and OEAB pulled down, satisfying safe-bus initialization requirements in industrial control backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL and LVTTL logic domains without level-shifting. |
| Operating Temperature | –40°C to 85°C - Qualified for industrial-grade embedded systems including programmable logic controllers and data acquisition units. |
| Output Drive | –32 mA IOH / 64 mA IOL - Drives heavy capacitive loads (e.g., >100 pF traces or multiple TTL inputs) without signal degradation. |
| Propagation Delay | tPLH/tPHL ≤ 3.6 ns @ 5 V - Enables reliable operation in 100+ MHz bus cycles with margin for setup/hold timing closure. |
| Thermal Resistance | θJA = 94°C/W (DL package) - Supports continuous operation at full drive in compact enclosures with natural convection cooling. |
| Input Clamp Current | –18 mA IIK - Protects against transient overvoltage events on control lines during hot-plug or ESD exposure. |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - Guarantees robustness in noisy industrial environments with shared ground returns. |
Pinout & Package
SN74ABT16623DL uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch lead pitch and gull-wing leads. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation standard.
| 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 transfer, 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 transfer, high places A outputs in high-Z. |
| 1A1–1A8, 2A1–2A8 | Port A Data Inputs/Outputs | First and second 8-bit group of bidirectional A-side I/Os; reinforced by dual-enable storage mode. |
| 1B1–1B8, 2B1–2B8 | Port B Data Inputs/Outputs | First and second 8-bit group of bidirectional B-side I/Os; electrically isolated from A ports when both OEs are high. |
| VCC (Pins 7, 18, 28, 39) | Power Supply | Distributed VCC pins minimize IR drop and supply noise across high-speed switching activity. |
| GND (Pins 4, 10, 15, 21, 27, 32, 42, 45) | Ground Reference | Eight dedicated GND pins reduce ground bounce and improve signal integrity in multi-bit parallel interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| True bidirectional data path | Simultaneous A↔B communication enabled via independent OEAB/OEBA control - eliminates need for external direction logic in full-duplex bus bridges. |
| Dual-enable data hold mode | When OEAB and OEBA are both low, each port reinforces its own data - maintains stable bus states without external latches during arbitration pauses. |
| High-noise-immunity BiCMOS | EPIC-IIB process achieves <1 V output ground bounce (VOLP) at 5 V - prevents false triggering in mixed-signal systems with shared power rails. |
| Flow-through pinout | Input and output pins arranged linearly across package edges - simplifies layer routing and reduces trace crosstalk in dense 16-bit bus layouts. |
| Distributed power/ground | Four VCC and eight GND pins interleaved across package - lowers effective loop inductance and suppresses simultaneous switching noise (SSN). |
Applications
| Industrial Backplane Interconnect | Memory Expansion Interface |
|---|---|
|
Use Scenario: Connecting CPU local bus to peripheral expansion slots in modular PLC chassis with hot-swap capability. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing address/data multiplexing between master and slave cards under asynchronous timing control. Use Value: Dual-enable storage mode holds bus state during card insertion/removal, preventing glitches on shared address lines during reconfiguration. |
Use Scenario: Extending 16-bit SRAM or Flash memory width in embedded controller designs with limited GPIO resources. IC Role / Device Role / Timing Role: Direction-controlled data buffer isolating memory bus from processor during DMA transfers and interrupt servicing. Use Value: ±64 mA IOL drives long memory traces and multiple chip selects without external buffers, reducing BOM count and board area. |
| Test Equipment Bus Arbitration | Legacy ISA-Compatible Adapter |
|
Use Scenario: Managing shared GPIB or VXI data bus among multiple instruments in automated test systems. IC Role / Device Role / Timing Role: Isolation and direction control element in multi-master bus arbitration logic with deterministic turnaround delay. Use Value: tPZL/tPLZ ≤ 6 ns ensures rapid bus release after transmission, minimizing arbitration latency in time-critical measurement sequences. |
Use Scenario: Adapting modern microcontroller peripherals to legacy ISA bus timing and voltage levels in retro-computing hardware. IC Role / Device Role / Timing Role: Level-translating transceiver bridging 3.3 V MCU I/O to 5 V ISA data/address bus with controlled slew rate. Use Value: TTL-compatible VIH/VIL thresholds and 5 V tolerant I/O allow direct connection to ISA without discrete level shifters or pull-ups. |
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 |
|---|---|---|---|
| SN74LVC16623DL | Lower voltage operation (1.65–3.6 V), reduced drive (–24 mA/24 mA), higher propagation delay (≤6.7 ns). | Suitable for battery-powered or low-power 3.3 V systems but not 5 V TTL interoperability. | Select when power efficiency and 3.3 V compatibility outweigh 5 V drive and speed requirements. |
| SN74ABT162245DL | Unidirectional architecture (separate A→B and B→A paths), identical voltage range and drive strength. | Requires external direction logic; lacks dual-enable storage mode and true bidirectional flexibility. | Choose only if system-level control logic already manages direction separately and storage mode is unnecessary. |
Compared with SN74ABT16623DL, SN74LVC16623DL trades 5 V tolerance and speed for lower power and voltage scalability, while SN74ABT162245DL sacrifices bidirectional simplicity for marginally better noise margin in unidirectional point-to-point links - neither offers pin-compatible replacement nor identical functional behavior.
Availability
SN74ABT16623DL is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy interface adaptation requiring stable component supply, long-lifecycle support, and guaranteed 5 V TTL interoperability.
Supply support for SN74ABT16623DL 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 ICs.
The SN74ABT16623DL belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for robust 5 V backplane and board-to-board communication in noise-prone industrial environments.
FAQ
What is the maximum clock frequency supported by SN74ABT16623DL in a data bus application?
The SN74ABT16623DL does not include an internal clock; it is an asynchronous transceiver. Its usable data rate depends on propagation delay and system timing margins. With tPLH/tPHL ≤ 3.6 ns and setup/hold times under 1 ns, SN74ABT16623DL reliably supports bus cycles up to 100 MHz in well-designed PCB layouts with controlled impedance and minimal stub length.
Does SN74ABT16623DL support hot-swap or live-insertion capability?
SN74ABT16623DL supports safe hot-swap operation when OEBA is tied to VCC via a pullup resistor and OEAB to GND via a pulldown resistor. This ensures all outputs remain in high-impedance state during power-up/down transitions, preventing bus contention. The device's >500 mA latch-up immunity further enhances robustness during live insertion into powered backplanes.
Can SN74ABT16623DL be used as two independent 8-bit transceivers?
Yes, SN74ABT16623DL is explicitly designed to operate as two independent 8-bit transceivers. Pins 1–24 and 25–48 form separate 8-bit A/B port groups, each with dedicated OEAB/OEBA controls (1OEAB/1OEBA and 2OEAB/2OEBA). This allows concurrent bidirectional communication on two distinct data paths without interference.
What is the thermal performance of SN74ABT16623DL in its DL package?
SN74ABT16623DL in the SSOP-DL package has a junction-to-ambient thermal resistance (θJA) of 94°C/W. Under worst-case conditions (5.5 V, full 64 mA drive on all 16 outputs), power dissipation remains below 1.2 W, resulting in a junction temperature rise of ~113°C above ambient - well within its 85°C max operating temperature when mounted on standard FR-4 with moderate copper pour.
How does the dual-enable storage mode function in SN74ABT16623DL?
When both OEAB and OEBA are logic low, SN74ABT16623DL enters dual-enable storage mode: each port's outputs reinforce their corresponding inputs, effectively latching data. If all external drivers to both A and B buses are in high-Z, the 32 bus lines retain their last valid states - enabling glitch-free bus parking during arbitration pauses or firmware reconfiguration without external flip-flops.
SN74ABT16623DL 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
SN74ABT16623DL FAQ
1.How can I place an order for SN74ABT16623DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16623DL 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 SN74ABT16623DL reliable?
The price and inventory of SN74ABT16623DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16623DL is usually 5 days.
3.What payment methods are accepted for SN74ABT16623DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT16623DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT16623DL?
SN74ABT16623DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16623DL 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 SN74ABT16623DL?
For technical support, including SN74ABT16623DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16623DL requirements.
6.How does Aetrix verify that SN74ABT16623DL is sourced from the original manufacturer or authorized distributors?
All SN74ABT16623DL 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 SN74ABT16623DL meets industry standards.
7.What is the process for return or replacement of SN74ABT16623DL?
All SN74ABT16623DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16623DL, 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 SN74ABT16623DL part is unused and in its original packaging.
Return procedure for SN74ABT16623DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT16623DL Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
